金山老师的笔记

Appearance

1. SSM框架整合 ​

  • Spring

  • SpringMVC

  • Mybatis

1.1. 创建webapp骨架的项目 ​

img

1.2. 添加依赖 ​

Spring-容器

Spring-text

Springmvc-模块

Springmvc-jdbc

SpringMVC依赖的Jackson的json库

SpringMVC的校验框架

文件上传下载的类库

Jsp、Servlet API()

Jstl 标签库

Mybatis的类库

Mybatis的分页插件

mybatis-spring 需要使用Spring的IOC容器管理SQLSessionFactory：:SQLSessionFactoryBean

数据库驱动:mysql-connector-java 5.4. 1

数据源的类库：（C3p0、DBCP、HikariCP）

事务: Springmvc-事务

事务使用的面向切面aop织入(aspectjweaver)

日志的类库：lo4j的日志

xml
<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.neuedu</groupId>
  <artifactId>ssm</artifactId>
  <version>1.0</version>
  <packaging>war</packaging>

  <name>ssm Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <!-- 单元测试的类库 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>

    <!-- Spring对MVC的支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>

    <!-- Spring对jdbc-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>
    <!-- Spring对事务的支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>
    <!-- Spring对测试的支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.5</version>
    </dependency>




    <!--解析对象为json  start -->
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.9</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.9</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.9.1</version>
    </dependency>
    <!--解析对象为json  end  -->


    <!--SpringMVC依赖的数据校验框架-->
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-validator</artifactId>
      <version>5.1.0.Final</version>
    </dependency>


    <!-- 对SpirngMVC 上传文件的支持 https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.4</version>
    </dependency>

    <!--提供编译环境的支持 Servlet API  HTTPServletReqest.....-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>


    <!--提供编译环境的支持 JSP API  例如pageContext等.-->
    <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.3</version>
      <scope>provided</scope>
    </dependency>



    <!--jstl   start .-->
    <!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/taglibs/standard -->
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    <!--jstl   end .-->


    <!-- mybatis框架-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.3</version>
    </dependency>

    <!-- MySQL数据库的驱动-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.48</version>
    </dependency>

  <!--    第三方写好的mybatis分页组件-->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>5.1.11</version>
    </dependency>


    <!-- spring 和 mybatis的桥梁  https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.4</version>
    </dependency>


    <!--dbcp  https://mvnrepository.com/artifact/commons-dbcp/commons-dbcp -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>


    <!-- 日志 ： https://mvnrepository.com/artifact/log4j/log4j -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>

    <!-- Spring对事务的支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.2.4.RELEASE</version>
    </dependency>


  </dependencies>

  <build>
    <finalName>ssm</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

1.3. 整合思路 ​

由spring管理SQLSessionFactory

Spring和Mybatis整合生成代理对象（通过Spring生成Mapper的代理对象）

1 )搭建Spirng（SpringMVC的程序）

  1. 搭建Mybatis的程序(控制台程序)

  2. 将SQLSessionFactory交给Spring容器管理

1.4. 搭建SpringMVC框架 ​

1.4.1. IOC配置文件（SpringMVC.xml） ​

1） 包扫描

2） 开启mvc:annotation-driven注解驱动

3） 可以配置视图解析器（前缀、后缀）此处默认不进行配置

4） 因为RESTful风格需要mvc:default-servlet-handler 用于处理静态资源

5） 配置文件上传的解析器

xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--配置扫描组件    -->
    <context:component-scan base-package="com.neuedu"/>

    <!--mvc的注解驱动 -->
    <mvc:annotation-driven   />

    <!--第三种声明 默认servlet处理器-->
    <mvc:default-servlet-handler/>


    <!--指定使用common-fileupload类型的方式解析request中的文件内容-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--设置允许上传的最大多少字节 -->
        <property name="maxUploadSize" value="99999999999"></property>
    </bean>
    
</beans>

1.4.2. Web.xml中配置前端控制器 ​

xml
<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
  <display-name>Archetype Created Web Application</display-name>

  <!--前端控制器-->
  <servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <!--默认的配置文件的名字applicationContext.xml-->
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
<!--    当容器启动的时候就立即加载前端控制器，否则会在第一次请求的时候初始化，导致第一次请求慢-->
    <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>


</web-app>

1.4.3. 编写Controller进行测试 ​

java
package com.neuedu.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/2  15:50 02
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 第一个控制器的测试程序
 * http://127.0.0.1:8080/ssm/index
 */
@RestController
public class IndexController {

    @RequestMapping("/index")
    public String index(){
        return "index";
    }

}

1.4.4. 发布Tomcat使用浏览器访问测试mvc程序 ​

img

img

img

1.4.5. 配置日志组件log4j ​

官网：

http://logging.apache.org/log4j/1.2/manual.html

博客：

https://www.cnblogs.com/wangzhuxing/p/7753420.html

添加组件依赖（开始已经完成）.

设置日志组件，

1.4.5.1. 在classpath下添加log4j.properties ​

properties
#配置全局的日志级别和输出方式
log4j.rootLogger=DEBUG, stdout  



#单独针对org.springframework包设置级别INFO
#log4j.logger.org.springframework=INFO
#单独针对RequestMappingHandlerMapping类设置级别INFO
#log4j.logger.org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping=ERROR
#log4j.logger.org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping=DEBUG


#自定义包（自己写的）
log4j.logger.com.neuedu=NONE
#log4j.logger.com.neuedu.dao=DEBUG

#设置sql输出
#log4j.logger.com.neuedu.framework=DEBUG
#log4j.logger.java.sql.Statement=DEBUG
#log4j.logger.java.sql.PreparedStatement=DEBUG
#log4j.logger.java.sql.ResultSet=DEBUG


#设置外观（如何除数日志）
#外观ConsoleAppender ---向控制台输出，文件
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#设置日志的布局类型
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout  
#设置输出日志的格式
log4j.appender.stdout.layout.ConversionPattern=[%p]\:%d{HH:mm:ss} %c(%L\u884C) %m%n

1.4.5.2. 自定义的的日志调用 ​

java
/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/2  15:50 02
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 第一个控制器的测试程序
 * http://127.0.0.1:8080/ssm/index
 *  setting :  ERROR
 *   DEBUG  比较多
 *   INFO  级别 重要一点
 *   ERROR 级别更高一点
 *
 */
@RestController
public class IndexController {

    Logger logger = Logger.getLogger(IndexController.class);

    @RequestMapping("/index")
    public String index(){
        logger.trace("trace..............");// TRACE DEBUG INFO ERROR FATAL
        logger.debug("DEBUG..............");//DEBUG INFO ERROR FATAL
        logger.info("info.............."); // INFO ERROR FATAL
        logger.error("error..............");//ERROR FATAL
        logger.fatal("fatal..............");//FATAL


        return "index";
    }
}

1.4.6. 全局的异常处理器 ​

略

1.4.7. 全局的数据校验 ​

略

1.5. 搭建Mybatis的程序 ​

1.5.1. 添加依赖 ​

参考全局的依赖

1.5.2. SqlMapConfig.xml ​

xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <environments default="development">


        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>


    </environments>
    <mappers>
        <mapper resource="Mapper.xml"/>
    </mappers>
</configuration>

1.5.3. 在dao包下配置Mapper代理 ​

java
package com.neuedu.dao;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/2  16:38 02
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 测试的第一个代理接口
 */
public interface TestMapper {

    public int selectUserCount();
}

1.5.4. 配置Mapper.xml ​

xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.neuedu.dao.TestMapper">

    <select id="selectUserCount" resultType="int">
        select count(1) from t_user
     </select>

</mapper>

1.5.5. 将Mapper添加到SqlMapConfig.xml中 ​

img

1.5.6. 使用main的形式访问mybatis(单元测试) ​

img

java
package com.neuedu.dao;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;

import java.io.InputStream;

import static org.junit.Assert.*;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/2  16:43 02
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     :
 */
public class TestMapperTest {

    SqlSessionFactory factory = null;
    String config = "SqlMapConfig.xml";
    @Before
    public void setUp() throws Exception {

        InputStream is = Resources.getResourceAsStream(config);
        factory = new SqlSessionFactoryBuilder().build(is);
    }

    @Test
    public void selectUserCount() {
        SqlSession session = factory.openSession();

        TestMapper dao =  session.getMapper(TestMapper.class);
        int count = dao.selectUserCount();

        System.out.println("count:"+count);


        session.close();
    }
}

img

1.6. 将SQLSessionFactory放到IOC容器中 ​

提前编写Controller、Service并设置依赖关系（UserController依赖UserService，UserService依赖TestMapper）

1.6.1. UserService ​

java
package com.neuedu.service;

import com.neuedu.dao.TestMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  8:42 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 用户的逻辑层
 */
@Service
public class UserService {

    @Autowired
    TestMapper testMapper;


    public List queryAll(){
        int count = testMapper.selectUserCount();
        System.out.println("count :"+count );
        return null;
    }

}

1.6.2. UserController ​

java
package com.neuedu.controller;

import com.neuedu.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  8:39 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 用户的控制器
 */
@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;



    @ResponseBody
    @RequestMapping("/list")
    public String list(){
        List list = userService.queryAll();
        return "user - list ";
    }

}

启动的时候会抛出依赖失败的异常

img

1.6.3. 使用**IOC容器自动的生成Mapper代理对象并使用容器管理 ​

1 ）配置DataSource 使用的是dbcp

2）配置SQLSessionFactoryBean

3） 配置单个TestMapper（弃用）

4）启动包扫描的形式注册多个Mapper接口的代理对象

xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--配置扫描组件    -->
    <context:component-scan base-package="com.neuedu"/>

    <!--mvc的注解驱动 -->
    <mvc:annotation-driven   />


    <!--第三种声明 默认servlet处理器-->
    <mvc:default-servlet-handler/>


    <!--指定使用common-fileupload类型的方式解析request中的文件内容-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--设置允许上传的最大多少字节 -->
        <property name="maxUploadSize" value="99999999999"></property>
    </bean>


    <!--配置数据源-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <property name="maxActive" value="30"/>
    </bean>

    <!--全局的SQLSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
       <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:SqlMapConfig.xml"/>
    </bean>

    <!--单独声明TestMapper的代理类   -->
<!--    <bean id="testMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">-->
<!--        <!–告诉MapperFactoryBean生成那个接口的代理类–>-->
<!--        <property name="mapperInterface" value="com.neuedu.dao.TestMapper"/>-->
<!--        <!–注入一个SQLSessionFactory的对象，好让他创建代理类–>-->
<!--        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>-->
<!--    </bean>-->



    <!--批量扫描com.neuedu.dao包-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactory" ref="sqlSessionFactory">  </property>
        <property name="basePackage" value="com.neuedu.dao"/>
    </bean>



</beans>

1.6.4. 使用mybatis工具生成Mapper接口 ​

1.6.4.1. 要求mapper.java和Mapper.xml在同一个包下 ​

img

同一个包下的xml默认不编译需要添加maven配置使maven编译时复制xml到target

img

1.6.5. 使用mybatis工具生成Mapper接口 ​

1.6.6. 修改了下UserController和UserService的代码（依赖关系） ​

1.6.6.1. UserController ​

java
package com.neuedu.controller;

import com.neuedu.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  8:39 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 用户的控制器
 */
@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @ResponseBody
    @RequestMapping("/list")
    public List list(){
        List list = userService.queryAll();
        return list;
    }

}

1.6.6.2. UserService ​

java
package com.neuedu.service;

import com.neuedu.dao.TUserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  8:42 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 用户的逻辑层
 */
@Service
public class UserService {

//    @Autowired
//    TestMapper testMapper;

    @Autowired
    TUserMapper tUserMapper;

    public List queryAll(){
//        int count = testMapper.selectUserCount();
//        System.out.println("count :"+count );
        return tUserMapper.selectByExample(null);
    }


}

将原来的自己写的TestMapper删掉了,单元测试的TestMapperTest类注释掉了

1.6.6.3. 测试 ​

http://127.0.0.1:8080/ssm/user/list

img

1.7. 管理事务 ​

xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--配置扫描组件    -->
    <context:component-scan base-package="com.neuedu"/>

    <!--mvc的注解驱动 -->
    <mvc:annotation-driven/>


    <!--第三种声明 默认servlet处理器-->
    <mvc:default-servlet-handler/>


    <!--指定使用common-fileupload类型的方式解析request中的文件内容-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--设置允许上传的最大多少字节 -->
        <property name="maxUploadSize" value="99999999999"></property>
    </bean>


    <!--配置数据源-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <property name="maxActive" value="30"/>
    </bean>

    <!--全局的SQLSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:SqlMapConfig.xml"/>
    </bean>

    <!--单独声明TestMapper的代理类   -->
    <!--<bean id="testMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <!–告诉MapperFactoryBean生成那个接口的代理类–>
        <property name="mapperInterface" value="com.neuedu.dao.TestMapper"/>
        <!–注入一个SQLSessionFactory的对象，好让他创建代理类–>
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>-->

    <!-- <bean id="tUserMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <!–告诉MapperFactoryBean生成那个接口的代理类–>
        <property name="mapperInterface" value="com.neuedu.dao.TUserMapper"/>
        <!–注入一个SQLSessionFactory的对象，好让他创建代理类–>
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>


     <bean id="tAccountMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
         <!–告诉MapperFactoryBean生成那个接口的代理类–>
         <property name="mapperInterface" value="com.neuedu.dao.TAccountMapper"/>
         <!–注入一个SQLSessionFactory的对象，好让他创建代理类–>
         <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
     </bean>


     <bean id="tStuAccountMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
         <!–告诉MapperFactoryBean生成那个接口的代理类–>
         <property name="mapperInterface" value="com.neuedu.dao.TStuAccountMapper"/>
         <!–注入一个SQLSessionFactory的对象，好让他创建代理类–>
         <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
     </bean>-->

    <!--批量扫描com.neuedu.dao包
        在此处将com.neuedu.dao接口进行扫描,
            com.neuedu.dao.TUserMapoper
            com.neuedu.dao.TStuMapper
        生成接口的（mybatis）代理对象
            TUserMapoper tuserMapper
            TStuMapper tStuMapper

    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
        <property name="basePackage" value="com.neuedu.dao"/>
    </bean>


    <!--    <import resource="classpath: spring-tx.xml"-->

    <!-- tx 事务管理器-->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
        <!--commit rollback-->
    </bean>


    <!--配置事务的顾问-->
    <tx:advice id="txAdivce" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="select*" propagation="SUPPORTS"/>
            <tx:method name="insert*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="*insert" propagation="REQUIRED"/>
            <tx:method name="*update" propagation="REQUIRED"/>
            <tx:method name="save*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
        </tx:attributes>
    </tx:advice>


    <!--配置通知的切面-->
    <aop:config>
        <aop:pointcut id="servceMethod" expression="execution(* com.neuedu.service.*.*(..))"/>
        <aop:advisor advice-ref="txAdivce" pointcut-ref="servceMethod"></aop:advisor>
    </aop:config>


</beans>

在service、Controller的基础上追加save方法

java
package com.neuedu.controller;

import com.neuedu.entity.TUser;
import com.neuedu.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  8:39 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 用户的控制器
 */
@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @ResponseBody
    @RequestMapping("/list")
    public List list(){
        List list = userService.queryAll();
        return list;
    }


    /**
     *  http://127.0.0.1:8080/ssm/user/save?userId=50&userName=abcdef&gender=男&status=0
     * @param user
     * @return
     */
    @ResponseBody
    @RequestMapping("/save")
    public Map save(TUser user) throws Exception {
       boolean success = userService.save(user);

       Map result = new HashMap();
       result.put("success",success);

       return result;
    }

}
java
package com.neuedu.service;

import com.neuedu.dao.TUserMapper;
import com.neuedu.entity.TUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  8:42 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 用户的逻辑层
 */
@Service
public class UserService {

//    @Autowired
//    TestMapper testMapper;

    @Autowired
    TUserMapper tUserMapper;

    public List queryAll(){
//        int count = testMapper.selectUserCount();
//        System.out.println("count :"+count );
        return tUserMapper.selectByExample(null);
    }


    /**
     * 在service层添加save方法
     * @param user
     * @return
     */
    public boolean save(TUser user) throws Exception {



        int count = tUserMapper.insertSelective(user);

        if(!"男".equals(user.getGender()) || !"女".equals(user.getGender())){
            throw new Exception("性别不正确");
        }

        return count>0;
    }


}

正常的请求

http://127.0.0.1:8080/ssm/user/save?userId=50&userName=abcdef&gender=%E7%94%B7&status=0

有可能产生异常的

http://127.0.0.1:8080/ssm/user/save?userId=50&userName=abcdef&gender=xx&status=0

1.8. 测试的逻辑 ​

2. SSM单表增删改查 ​

以t_product为例

2.1. 查询列表 ​

2.1.1. TProductMapper通过工具生成 √ ​

2.1.2. ProductService查询功能(依赖dao) ​

依赖dao(TProductMapper)

java
package com.neuedu.service;

import com.neuedu.dao.TProductMapper;
import com.neuedu.entity.TProduct;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  13:44 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     :
 */
@Service
public class ProductService {

    @Autowired
    TProductMapper productMapper;

    public List<TProduct> queryPage(){
        return productMapper.selectByExample(null);
    }

}

2.1.3. ProductController控制器方法查询集合 ​

让控制器依赖ProductService

分页展示列表

java
package com.neuedu.controller;

import com.neuedu.entity.TProduct;
import com.neuedu.service.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/4/3  13:45 03
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 产品的控制器
 */
@Controller
@RequestMapping("/product")
public class ProductControlller {
    @Autowired
    ProductService productService;


    /**
     * 分页查询
     * http://127.0.0.1:8080/ssm/product/list
     * @param model
     * @return
     */
    @RequestMapping("/list")
    public String listPage(Model model){

        List<TProduct> list = productService.queryPage();
        //将查询集合放到作用域中，并展示到jsp的列表
        model.addAttribute("productList",list);


        return "/product/product_list.jsp";
    }
    
}

2.1.4. 展示列表的页面 ​

/product/product_list.jsp

java
<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 2020/4/3
  Time: 13:49
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
    <script>

        function ajaxDelete(pid){

            var xmlhttp;
            if (window.XMLHttpRequest)   {
                //  IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码
                xmlhttp=new XMLHttpRequest();
            }
            else {
                // IE6, IE5 浏览器执行代码
                xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
            }

            xmlhttp.open("GET","${pageContext.request.contextPath}/product/ajaxDeleteById?id="+pid,true);
            xmlhttp.send();

            xmlhttp.onreadystatechange=function(){
                if (xmlhttp.readyState==4 && xmlhttp.status==200){
                    var data = eval('('+xmlhttp.responseText+')');
                    if(data.success){//刷新
                        window.location.href = window.location.href;
                    }else{
                        alert('出错了'+data.msg)
                    }
                }
            }
        }

    </script>
</head>
<body>
后台管理>产品列表

<table cellspacing="0" cellpadding="0" border="1" width="100%">

    <tr>
        <td>序号</td>
        <td>数据id</td>
        <td>产品名称</td>
        <td>价格</td>
        <td>操作</td>
    </tr>

    <c:forEach items="${productList}" var="product" varStatus="stat">
        <tr>
            <td>${stat.count}</td>
            <td>${product.pid}</td>
            <td>${product.name}</td>
            <td>${product.price}</td>
            <td>
                <a href="${pageContext.request.contextPath}/product/toEdit?id=${product.pid}" >修改</a>
                <a href="${pageContext.request.contextPath}/product/deleteById?id=${product.pid}" >删除</a>
                <a href="javascript:void(0)" onclick="ajaxDelete('${product.pid}')" >ajax删除</a>
            </td>
        </tr>
    </c:forEach>


</table>




</body>
</html>

2.2. 添加 ​

2.2.1. 添加页面 ​

html
%--
  Created by IntelliJ IDEA.
  User: root
  Date: 2020/4/3
  Time: 14:10
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>产品添加</title>
</head>
<body>


<form action="${pageContext.request.contextPath}/product/save" method="post">
    <table cellpadding="0" cellspacing="0" border="1" width="100%">
        <tr>
            <td>产品id</td>
            <td><input type="text" name="pid"></td>
        </tr>

        <tr>
            <td>名称</td>
            <td><input type="text" name="name"></td>
        </tr>

        <tr>
            <td>单价</td>
            <td><input type="text" name="price"></td>
        </tr>

        <tr>
            <td colspan="2"><input type="submit" value="添加产品"/> </td>
        </tr>

    </table>


</form>

</body>
</html>

2.2.2. Service的添加方法 ​

java
/**
 * 保存
 * @param product
 * @return
 */
public boolean save(TProduct product){
    int count =  productMapper.insertSelective(product);
    return count>0;
}

2.2.3. 控制器： ​

1）跳转到添加页

2）保存产品的方法

@RequestMapping("/toAdd")
public String toAdd(Model model){
    return "/product/product_add.jsp";
}


/**
 * 保存新增的产品信息
 * @param product
 * @return
 */
@RequestMapping("/save")
public String save(TProduct product){

    boolean success = productService.save(product);

    if(success){
        //跳转到查询列表
        return "redirect:/product/list";
    }else{
        //跳转回添加页 展示错误信息
        return "product/product_add.jsp";
    }

}

2.2.4. 解决中文乱码 ​

xml
<filter>
  <filter-name>CharacterEncodingFilter</filter-name>
  <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  <init-param>
    <param-name>encoding</param-name>
    <param-value>UTF-8</param-value>
  </init-param>
  <init-param>
    <param-name>forceRequestEncoding</param-name>
    <param-value>true</param-value>
  </init-param>
  <init-param>
    <param-name>forceResponseEncoding</param-name>
    <param-value>true</param-value>
  </init-param>

</filter>

2.3. 修改 ​

修改的入口，在列表页中添加一列“修改”按钮,当点击修改按钮跳转到product_edit.jsp,jsp提供展示表单的作用（待修改的 数据展示）。点击页面的保存按钮提交修改的信息到数据库中，并刷新列表。

2.3.1. product_list.jsp ​

html
<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 2020/4/3
  Time: 13:49
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
    <script>

        function ajaxDelete(pid){

            var xmlhttp;
            if (window.XMLHttpRequest)   {
                //  IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码
                xmlhttp=new XMLHttpRequest();
            }
            else {
                // IE6, IE5 浏览器执行代码
                xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
            }

            xmlhttp.open("GET","${pageContext.request.contextPath}/product/ajaxDeleteById?id="+pid,true);
            xmlhttp.send();

            xmlhttp.onreadystatechange=function(){
                if (xmlhttp.readyState==4 && xmlhttp.status==200){
                    var data = eval('('+xmlhttp.responseText+')');
                    if(data.success){//刷新
                        window.location.href = window.location.href;
                    }else{
                        alert('出错了'+data.msg)
                    }
                }
            }
        }

    </script>
</head>
<body>
后台管理>产品列表

<table cellspacing="0" cellpadding="0" border="1" width="100%">

    <tr>
        <td>序号</td>
        <td>数据id</td>
        <td>产品名称</td>
        <td>价格</td>
        <td>操作</td>
    </tr>

    <c:forEach items="${productList}" var="product" varStatus="stat">
        <tr>
            <td>${stat.count}</td>
            <td>${product.pid}</td>
            <td>${product.name}</td>
            <td>${product.price}</td>
            <td>
                <a href="${pageContext.request.contextPath}/product/toEdit?id=${product.pid}" >修改</a>
                <a href="${pageContext.request.contextPath}/product/deleteById?id=${product.pid}" >删除</a>
                <a href="javascript:void(0)" onclick="ajaxDelete('${product.pid}')" >ajax删除</a>
            </td>
        </tr>
    </c:forEach>


</table>

</body>
</html>

2.3.2. product_edit.jsp ​

html
<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 2020/4/3
  Time: 14:10
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>产品添加</title>
</head>
<body>


<form action="${pageContext.request.contextPath}/product/edit" method="post">
    <table cellpadding="0" cellspacing="0" border="1" width="100%">
        <tr>
            <td>产品id</td>
            <td><input type="text" name="pid" value="${product.pid}" readonly></td>
        </tr>

        <tr>
            <td>名称</td>
            <td><input type="text" name="name" value="${product.name}"></td>
        </tr>

        <tr>
            <td>单价</td>
            <td><input type="text" name="price" value="${product.price}"></td>
        </tr>

        <tr>
            <td colspan="2"><input type="submit" value="更新产品"/> </td>
        </tr>

    </table>


</form>

</body>
</html>

2.3.3. Service的根据主键查询 ​

java
/**
 * 根据主键查询出待修改的产品
 * @param pid
 * @return
 */
public TProduct selectById(String pid){
    return  productMapper.selectByPrimaryKey(pid);
}

2.3.4. Service的修改方法 ​

/**
 * 根据主键更新
 * @param product
 * @return
 */
public boolean update(TProduct product){
    int count = productMapper.updateByPrimaryKeySelective(product);
    return count>0;
}

2.3.5. Controller的方法 ​

java
@RequestMapping("/toEdit")
public String toEdit(Model model,String id){
    TProduct product = productService.selectById(id);
    model.addAttribute("product",product);
    return "/product/product_edit.jsp";
}

@RequestMapping("/edit")
public String edit(TProduct product){
    boolean success = productService.update(product);
    if(success){
        //跳转到查询列表
        return "redirect:/product/list";
    }else{
        //跳转回添加页 展示错误信息
        return "product/product_edit.jsp";
    }
}

2.4. 删除 ​

2.4.1. 在列表页中添加删除按钮，（普通的get删除、ajax删除两种情况都有） ​

2.4.2. 详见修改时的[列表页面] ​

2.4.3. 后端的Controller的删除方法 ​

java
@RequestMapping("/deleteById")
public String deleteById(String id){

    boolean success = productService.deleteBydId(id);

    //需要携带异常消息

    return "redirect:/product/list";
}


@ResponseBody
@RequestMapping("/ajaxDeleteById")
public Map ajaxDeleteById(String id){

    boolean success = productService.deleteBydId(id);

    //需要携带异常消息
    Map result = new HashMap();
    result.put("success",success);

    return result;
}

2.4.4. Service的删除方法 ​

java
public boolean deleteBydId(String id) {
    return productMapper.deleteByPrimaryKey(id)>0;
}

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