7. 参数绑定

7.1. 参数绑定的过程

下表描述了支持的控制器方法参数

Controller method argument	Description
`WebRequest`, `NativeWebRequest`	Generic access to request parameters and request and session attributes, without direct use of the Servlet API.
`javax.servlet.ServletRequest`, `javax.servlet.ServletResponse`	Choose any specific request or response type — for example, `ServletRequest`, `HttpServletRequest`, or Spring’s `MultipartRequest`, `MultipartHttpServletRequest`.
`javax.servlet.http.HttpSession`	Enforces the presence of a session. As a consequence, such an argument is never `null`. Note that session access is not thread-safe. Consider setting the `RequestMappingHandlerAdapter` instance’s `synchronizeOnSession` flag to `true` if multiple requests are allowed to concurrently access a session.
`javax.servlet.http.PushBuilder`	Servlet 4.0 push builder API for programmatic HTTP/2 resource pushes. Note that, per the Servlet specification, the injected `PushBuilder` instance can be null if the client does not support that HTTP/2 feature.
`java.security.Principal`	Currently authenticated user — possibly a specific `Principal` implementation class if known.Note that this argument is not resolved eagerly, if it is annotated in order to allow a custom resolver to resolve it before falling back on default resolution via `HttpServletRequest#getUserPrincipal`. For example, the Spring Security `Authentication` implements `Principal` and would be injected as such via `HttpServletRequest#getUserPrincipal`, unless it is also annotated with `@AuthenticationPrincipal` in which case it is resolved by a custom Spring Security resolver through `Authentication#getPrincipal`.
`HttpMethod`	The HTTP method of the request.
`java.util.Locale`	The current request locale, determined by the most specific `LocaleResolver` available (in effect, the configured `LocaleResolver` or `LocaleContextResolver`).
`java.util.TimeZone` + `java.time.ZoneId`	The time zone associated with the current request, as determined by a `LocaleContextResolver`.
`java.io.InputStream`, `java.io.Reader`	For access to the raw request body as exposed by the Servlet API.
`java.io.OutputStream`, `java.io.Writer`	For access to the raw response body as exposed by the Servlet API.
`@PathVariable`	For access to URI template variables. See URI patterns.
`@MatrixVariable`	For access to name-value pairs in URI path segments. See Matrix Variables.
`@RequestParam`	For access to the Servlet request parameters, including multipart files. Parameter values are converted to the declared method argument type. See `@RequestParam` as well as Multipart.Note that use of `@RequestParam` is optional for simple parameter values. See “Any other argument”, at the end of this table.
`@RequestHeader`	For access to request headers. Header values are converted to the declared method argument type. See `@RequestHeader`.
`@CookieValue`	For access to cookies. Cookies values are converted to the declared method argument type. See `@CookieValue`.
`@RequestBody`	For access to the HTTP request body. Body content is converted to the declared method argument type by using `HttpMessageConverter` implementations. See `@RequestBody`.
`HttpEntity<B>`	For access to request headers and body. The body is converted with an `HttpMessageConverter`. See HttpEntity.
`@RequestPart`	For access to a part in a `multipart/form-data` request, converting the part’s body with an `HttpMessageConverter`. See Multipart.
`java.util.Map`, `org.springframework.ui.Model`, `org.springframework.ui.ModelMap`	For access to the model that is used in HTML controllers and exposed to templates as part of view rendering.
`RedirectAttributes`	Specify attributes to use in case of a redirect (that is, to be appended to the query string) and flash attributes to be stored temporarily until the request after redirect. See Redirect Attributes and Flash Attributes.
`@ModelAttribute`	For access to an existing attribute in the model (instantiated if not present) with data binding and validation applied. See `@ModelAttribute` as well as Model and `DataBinder`.Note that use of `@ModelAttribute` is optional (for example, to set its attributes). See “Any other argument” at the end of this table.
`Errors`, `BindingResult`	For access to errors from validation and data binding for a command object (that is, a `@ModelAttribute` argument) or errors from the validation of a `@RequestBody` or `@RequestPart` arguments. You must declare an `Errors`, or `BindingResult` argument immediately after the validated method argument.
`SessionStatus` + class-level `@SessionAttributes`	For marking form processing complete, which triggers cleanup of session attributes declared through a class-level `@SessionAttributes` annotation. See `@SessionAttributes` for more details.
`UriComponentsBuilder`	For preparing a URL relative to the current request’s host, port, scheme, context path, and the literal part of the servlet mapping. See URI Links.
`@SessionAttribute`	For access to any session attribute, in contrast to model attributes stored in the session as a result of a class-level `@SessionAttributes` declaration. See `@SessionAttribute` for more details.
`@RequestAttribute`	For access to request attributes. See `@RequestAttribute` for more details.
Any other argument	If a method argument is not matched to any of the earlier values in this table and it is a simple type (as determined by BeanUtils#isSimpleProperty), it is resolved as a `@RequestParam`. Otherwise, it is resolved as a `@ModelAttribute`

7.2. 内置的参数

HttpServletRequest、HttpServletResponse、HTTPSession、Model、ModelMap

7.2.1.1. 映射方法

java

@RequestMapping("/list")
    public String list(ModelMap model , HttpServletRequest request, HttpServletResponse response, HttpSession session ) throws ServletException, IOException {
        ServletContext app1 = session.getServletContext();
        ServletContext app2 = request.getServletContext();
        System.out.println("app = " + app1);

        model.addAttribute("userList",userService.selectListEntity());
        return "/user/user_list";
    }

7.3. 基础类型

支持整型、字符串、单精度/双精度、布尔型

当请求的【参数名称】和【处理器形参名称】一致(区分大小写)时会将请求参数与形参进行绑定。

完成修改的功能

UserController.javauser_edit.jsp

java

package com.neuedu.mvc.controller;

import com.neuedu.mvc.entity.User;
import com.neuedu.mvc.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

/**
 * 项目：      spring-framework
 * 类名:       UserController
 * 创建时间：  2024/3/18 16：23
 * 描述 :
 * 作者 :     张金山
 * QQ :     314649444
 * Site:      https://jshand.gitee.io
 */
@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    IUserService userService;




    @RequestMapping("/list")
    public String list(ModelMap model , HttpServletRequest request, HttpServletResponse response, HttpSession session ) throws ServletException, IOException {
        ServletContext app1 = session.getServletContext();
        ServletContext app2 = request.getServletContext();
        System.out.println("app = " + app1);

        model.addAttribute("userList",userService.selectListEntity());
        return "/user/user_list";
    }


    @RequestMapping("toAdd")
    public String  toAdd(){
        return "/user/user_add";
    }

    /**
     * http://lo
     * @param request
     * @param response
     * @return
     * @throws ParseException
     */
    @RequestMapping("add")
    public String  add(HttpServletRequest request,HttpServletResponse response) throws ParseException {

        // 获取参数
        String userId = request.getParameter("userId");
        String userName = request.getParameter("userName");
        String birthday = request.getParameter("birthday");// "2024-03-19"  "asdfasfasdfas"
        String gender = request.getParameter("gender");
        String status = request.getParameter("status");
        //调用service保存

        User user = new User();
        user.setUserId(Integer.parseInt(userId));
        user.setUserName(userName);
        user.setBirthday(new SimpleDateFormat("yyyy-MM-dd").parse(birthday));
        user.setGender(gender);
        user.setStatus(Integer.parseInt(status));
        boolean success = userService.insert(user);
       String path = "";
        if(success) {
//            重定向
//            redirect   和  forward  使用的不带前缀和后缀的视图层处理
            path = "redirect:/user/list";
        }else{
            path = "/user/user_add";
        }
        return path;
    }

    @RequestMapping("forward")
    public ModelAndView  forward(HttpServletRequest request) throws ParseException {
        ModelAndView mv = new ModelAndView();

//        mv.setViewName("/dept/dept_add.jsp");
        mv.setViewName("forward:/dept/dept_add.jsp");
        return mv;

    }


    /**
     * http://localhost:8080/web/user/toEdit?userId=>>>
     * @param modelMap
     * @param userId
     * @return
     */
    @GetMapping("/toEdit")
    public String toEdit(  ModelMap modelMap,      Integer userId  ){
        modelMap.addAttribute("user",userService.selectById(userId));
        return "/user/user_edit";
    }


    @RequestMapping("update")
//    public String  update(   String userId,   String userName,  String birthday,   String gender,  String status  ) throws ParseException {
    public String  update( User user  ) throws ParseException {

        //调用service保存
        boolean success = userService.updateById(user);
        String path = "";
        if(success) {
//            重定向
//            redirect   和  forward  使用的不带前缀和后缀的视图层处理
            path = "redirect:/user/list";
        }else{
            path = "/user/user_edit";
        }
        return path;
    }



}

html

<%@ page import="java.util.List" %>
<%@ page import="com.neuedu.mvc.entity.User" %><%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2024/3/18
  Time: 16:26
  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" %>
<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%--<%--%>
<%--    List<User> userList = (List<User>) request.getAttribute("userList");--%>
<%--%>--%>
<h3>用户列表: </h3>
<form action="${pageContext.request.contextPath}/user/update" method="post">
     <table>
         <tr>
             <td>用户ID</td>
             <td>   <input type="text" name="userId" value="${user.userId}">  </td>
         </tr>
         <tr>
             <td>用户名</td>
             <td>   <input type="text" name="userName" value="${user.userName}">  </td>
         </tr>
         <tr>
             <td>出生日期("2024-03-19")</td>

             <td>   <input type="text" name="birthday" value="<fmt:formatDate pattern="yyyy-MM-dd"  value="${user.birthday}"/>">  </td>
         </tr>
         <tr>
             <td>性别</td>
             <td>   <input type="text" name="gender" value="${user.gender}">  </td>
         </tr>
         <tr>
             <td>状态</td>
             <td>   <input type="text" name="status" value="${user.status}">  </td>
         </tr>
         <tr>
             <td>
                 <button type="submit">提交</button>
                 <button type="reset">重置</button>
             </td>

         </tr>
     </table>



</form>


</body>
</html>

7.3.1. @RequestParam

当请求的【参数名称】和【处理器形参名称】不一致的时候需要使用注解@RequestParam进行自定义的绑定,

声明次注解则默认该参数必须提供（必须传）,可以使用required属性=false设置为非必须。

<input type="text" name="test" value="123546">
@RequestParam(value = "test",required = false) String myVar

通过defaultValue属性设置默认值

java

// http://127.0.0.1:8080/springmvc/param4?username=jshand&age=30&salary=3000.01&onstudy=true
@RequestMapping("/param4")
public void param4(HttpServletResponse response, @RequestParam(value = "username",required = false,defaultValue="admin") String name , Integer age, Double salary, boolean onstudy) throws ServletException, IOException {
    System.out.println("name-->"+name);
    System.out.println("age-->"+age);
    System.out.println("salary-->"+salary);
    System.out.println("onstudy-->"+onstudy);

    response.setContentType("text/html;charset=utf-8");//响应html，格式utf8
    PrintWriter out = response.getWriter();

    out.println("<div style='border:1px solid red'>name:"+name+"</div>");
    out.println("<div style='border:1px solid red'>age:"+age+"</div>");
    out.println("<div style='border:1px solid red'>salary:"+salary+"</div>");
    out.println("<div style='border:1px solid red'>onstudy:"+onstudy+"</div>");

    out.flush();
    out.close();
}

7.4. Pojo类型

7.4.1. 表单

html

<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 2020/3/27
  Time: 14:38
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

        <%--模拟用户注册，存在大量的字段--%>


    <form action="../param5">

        <!--模拟都是 30-字段 -->
        <table>
            <tr>
                <td>用户名字</td>
                <td><input type="text" name="username"></td>
            </tr>
            <tr>
                <td>常用地址</td>
                <td><input type="text" name="password"></td>
            </tr>
            <tr>
                <td>账户余额</td>
                <td><input type="text" name="amount"></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" value="用户注册"></td>
            </tr>
        </table>


    </form>

</body>
</html>

7.5. Pojo包装的POJO

为了解决同名参数可以使用pojo嵌套pojo解决

http://localhost:8080/web/doctor/update?doctor.id=1&doctor.name=222&dept.id=456&dept.name=DEV

Doctor.javaDept.javaDoctorVo.javaDoctorController.java

java

package com.neuedu.mvc.entity;

/**
 * 项目：      spring-framework
 * 类名:       Doctor
 * 创建时间：  2024/3/19 14：52
 * 描述 :
 * 作者 :     张金山
 * QQ :     314649444
 * Site:      https://jshand.gitee.io
 */
public class Doctor {

    private Integer id;

    private String name;


    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "Doctor{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }
}

java

package com.neuedu.mvc.entity;

/**
 * 项目：      spring-framework
 * 类名:       Dept
 * 创建时间：  2024/3/19 14：54
 * 描述 :
 * 作者 :     张金山
 * QQ :     314649444
 * Site:      https://jshand.gitee.io
 */
public class Dept {

    private Integer id;

    private  String name;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }



    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "Dept{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }
}

java

package com.neuedu.mvc.vo;

import com.neuedu.mvc.entity.Dept;
import com.neuedu.mvc.entity.Doctor;

/**
 * 项目：      spring-framework
 * 类名:       DoctorVo
 * 创建时间：  2024/3/19 14：58
 * 描述 :
 * 作者 :     张金山
 * QQ :     314649444
 * Site:      https://jshand.gitee.io
 */
public class DoctorVo {
   private  Doctor doctor;
   private Dept dept;

    public Doctor getDoctor() {
        return doctor;
    }

    public void setDoctor(Doctor doctor) {
        this.doctor = doctor;
    }

    public Dept getDept() {
        return dept;
    }

    public void setDept(Dept dept) {
        this.dept = dept;
    }

    @Override
    public String toString() {
        return "DoctorVo{" +
                "doctor=" + doctor +
                ", dept=" + dept +
                '}';
    }
}

java

package com.neuedu.mvc.controller;

import com.neuedu.mvc.entity.Dept;
import com.neuedu.mvc.entity.Doctor;
import com.neuedu.mvc.vo.DoctorVo;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletResponse;

/**
 * 项目：      spring-framework
 * 类名:       DoctorController
 * 创建时间：  2024/3/19 14：51
 * 描述 :
 * 作者 :     张金山
 * QQ :     314649444
 * Site:      https://jshand.gitee.io
 */
@Controller
@RequestMapping("doctor")
public class DoctorController {


    /**
     *
     *  <input type="text" name="doctor.id" value=""/>
     *  <input type="text" name="doctor.name" value=""/>
     *
     *  <input type="text" name="dept.id" value=""/>
     *  <input type="text" name="dept.name" value=""/>
     *
     *
     * http://localhost:8080/web/doctor/update?doctor.id=1&doctor.name=222&dept.id=456&dept.name=DEV
//     * @param doctor
     * @param vo
     */
    @RequestMapping("update")
//    public void save(Doctor doctor, Dept dept , HttpServletResponse response){
    public void save(DoctorVo vo , HttpServletResponse response){
        System.out.println("vo = " + vo);
    }
}

7.6. 数组类型

7.6.1. 控制器

java

/***
 * 接受数组
 *
 * 批量删除用户信息   【userId、userId、userId、userId】
 *
 */
@RequestMapping("/param7")
public void param7(HttpServletResponse response, Integer[] userId) throws IOException {
    response.setContentType("text/html;charset=utf-8");//响应html，格式utf8
    PrintWriter out = response.getWriter();


    StringBuffer ids = new StringBuffer();
    for (Integer id : userId) {
        ids.append(id+",");
    }

    out.println("<div style='border:1px solid blue'>批量删除的id：:"+
            ids.toString()
            +"</div>");
    out.flush();
    out.close();
}

7.6.2. Form表单

html

<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 2020/3/27
  Time: 14:38
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

    <form action="../param7">


        <table>
            <tr>
                <td>勾选id删除</td>
                <td>用户名</td>
                <td>密码</td>
            </tr>

            <tr>
                <td><input type="checkbox" name="userId" value="1"/> 1</td>
                <td>admin</td>
                <td>123456</td>
            </tr>

            <tr>
                <td><input type="checkbox" name="userId" value="2"/> 2</td>
                <td>jshand</td>
                <td>456789</td>
            </tr>

            <tr>
                <td><input type="checkbox" name="userId"  value="3"/> 3</td>
                <td>yaoming</td>
                <td>456789</td>
            </tr>
        </table>

        <input type="submit" value="批量删除">

    </form>



</body>
</html>

7.6.3. 页面效果

7.7. List类型封装参数

7.7.3. Form表单

<%--
  Created by IntelliJ IDEA.
  User: root
  Date: 2020/3/27
  Time: 14:38
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

<form action="${pageContext.request.contextPath}/user/batchAdd" method="post">


    <table>
        <tr>
            <td>用户id</td>
            <td>用户名</td>
            <td>性别</td>
        </tr>

        <tr>
            <td><input type="text" name="userList[0].userId"/></td>
            <td><input type="text" name="userList[0].userName"/></td>
            <td><input type="text" name="userList[0].gender"/></td>

        </tr>
        <tr>
            <td><input type="text" name="userList[1].userId"/></td>
            <td><input type="text" name="userList[1].userName"/></td>
            <td><input type="text" name="userList[1].gender"/></td>
        </tr>

        <tr>
            <td><input type="text" name="userList[2].userId"/></td>
            <td><input type="text" name="userList[2].userName"/></td>
            <td><input type="text" name="userList[2].gender"/></td>
        </tr>

    </table>

    <input type="submit" value="批量保存">

</form>


</body>
</html>

7.7.1. Vo中添加List属性添加setter、getter方法

java

package com.neuedu.mvc.vo;

import com.neuedu.mvc.entity.User;

import java.util.List;

/**
 * 项目：      spring-framework
 * 类名:       ParamVo
 * 创建时间：  2024/3/20 08：53
 * 描述 :
 * 作者 :     张金山
 * QQ :     314649444
 * Site:      https://jshand.gitee.io
 */
public class ParamVo {

    List<User> userList;


    public List<User> getUserList() {
        return userList;
    }

    public void setUserList(List<User> userList) {
        this.userList = userList;
    }
}

7.7.2. 控制器方法

java

@RequestMapping("batchAdd")
    public String batchAdd(ParamVo vo ){

        for (User user : vo.getUserList()) {
            userService.insert(user);
        }

        return "redirect:/user/list";
    }

    /**
     * 跳转到批量添加页面
     * @param vo
     * @return
     */
    @RequestMapping("toBatchAdd")
    public String toBatchAdd(ParamVo vo ){
        return "/user/user_add_batch";
    }

7.7.4. 测试效果

7.8. Map接受参数

7.8.1. Form表单

html

<%@ page import="java.util.List" %>
<%@ page import="com.neuedu.mvc.entity.User" %><%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2024/3/18
  Time: 16:26
  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>
</head>
<body>
<%--<%--%>
<%--    List<User> userList = (List<User>) request.getAttribute("userList");--%>
<%--%>--%>
<h3>用户列表: </h3>
<form action="${pageContext.request.contextPath}/user/add2" method="post">
     <table>
         <tr>
             <td>用户ID</td>
             <td>   <input type="text" name="userId" value="">  </td>
         </tr>
         <tr>
             <td>用户名</td>
             <td>   <input type="text" name="userName" value="">  </td>
         </tr>
         <tr>
             <td>出生日期("2024-03-19")</td>
             <td>   <input type="text" name="birthday" value="">  </td>
         </tr>
         <tr>
             <td>性别</td>
             <td>   <input type="text" name="gender" value="">  </td>
         </tr>
         <tr>
             <td>状态</td>
             <td>   <input type="text" name="status" value="">  </td>
         </tr>
         <tr>
             <td>
                 <button type="submit">提交</button>
                 <button type="reset">重置</button>
             </td>

         </tr>
     </table>



</form>






</body>
</html>

7.8.2. 控制器

需要注意，在Map参数上添加@RequestParam注解才能绑定参数

java

@RequestMapping("add2")
    public String  add(@RequestParam Map map) throws ParseException {

        System.out.println("map = " + map);
        //没有真正插入数据库，页面没有变化


        return "redirect:/user/list";
    }

7.9. 自定义的参数转换

页面上传递过的基础类型（Stirng、浮点型、整数等）可以直接绑定，Date特殊Springmvc默认无法转换，需要自定义转换器

7.9.1. 自定义一个转换器

java

package com.neuedu.converter;

import org.springframework.core.convert.converter.Converter;;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.logging.SimpleFormatter;

/**
 * 项目    ： spring-mvc-java1
 * 创建时间 ：2020/3/31  11:42 31
 * author  ：jshand-root
 * site    :  http://314649444.iteye.com
 * 描述     : 自定义的 类型转换器
 */
public class String2DateConverter implements Converter<String, Date> {

    static List<SimpleDateFormat> sdfs = new ArrayList();
    static{
        sdfs.add(new SimpleDateFormat("yyyy-MM-dd"));
        sdfs.add(new SimpleDateFormat("yyyy/MM/dd"));
        sdfs.add(new SimpleDateFormat("yyyy-MM-dd"));
        sdfs.add(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"));
        sdfs.add(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));

    }


    @Override
    public Date convert(String s) {
        Date date = null;

        for (SimpleDateFormat sdf : sdfs) {
            try {
                date = sdf.parse(s);
                return date;
    
            } catch (ParseException e) {
                e.printStackTrace();
            }
        }

        return null;
    }
}

7.9.2. 给处理器适配器注入converService**

xml

<mvc:annotation-driven conversion-service="conversionService"  />


<!-- 自定义的参数转换器  配置各种转换器 有默认值  String- stirng     stirng- Double ....     -->
<bean id="conversionService"  class="org.springframework.format.support.FormattingConversionServiceFactoryBean">

    <property name="converters">
        <list>
            <!--内部的Bean声明-->
            <bean id="string2DateConverter" class="com.neuedu.converter.String2DateConverter"/>
        </list>
    </property>
</bean>

7. 参数绑定 ​

7.1. 参数绑定的过程 ​

7.2. 内置的参数 ​

HttpServletRequest、HttpServletResponse、HTTPSession、Model、ModelMap ​

7.2.1.1. 映射方法 ​

7.3. 基础类型 ​

7.3.1. @RequestParam ​

7.4. Pojo类型 ​

7.4.1. 表单 ​

​

7.5. Pojo包装的POJO ​

​

7.6. 数组类型 ​

7.6.1. 控制器 ​

7.6.2. Form表单 ​

7.6.3. 页面效果 ​

7.7. List类型封装参数 ​

7.7.3. Form表单 ​

7.7.1. Vo中添加List属性 添加setter、getter方法 ​

7.7.2. 控制器方法 ​

7.7.4. 测试效果 ​

7.8. Map接受参数 ​

7.8.1. Form表单 ​

7.8.2. 控制器 ​

7.9. 自定义的参数转换 ​

7.9.1. 自定义一个转换器 ​

7.9.2. 给处理器适配器注入converService** ​

7. 参数绑定

7.1. 参数绑定的过程

7.2. 内置的参数

HttpServletRequest、HttpServletResponse、HTTPSession、Model、ModelMap

7.2.1.1. 映射方法

7.3. 基础类型

7.3.1. @RequestParam

7.4. Pojo类型

7.4.1. 表单

7.5. Pojo包装的POJO

7.6. 数组类型

7.6.1. 控制器

7.6.2. Form表单

7.6.3. 页面效果

7.7. List类型封装参数

7.7.3. Form表单

7.7.1. Vo中添加List属性添加setter、getter方法

7.7.2. 控制器方法

7.7.4. 测试效果

7.8. Map接受参数

7.8.1. Form表单

7.8.2. 控制器

7.9. 自定义的参数转换

7.9.1. 自定义一个转换器

7.9.2. 给处理器适配器注入converService**