SpringMVC -- 梗概--源码--壹--收参

附：实体类

Class ： User

package com.c61.entity;

import java.text.SimpleDateFormat;

import java.util.Date;

import org.springframework.format.annotation.DateTimeFormat;

import com.alibaba.fastjson.annotation.JSONField;

public class User {

    private Integer id;

    private String name;

    //@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")

    @DateTimeFormat(pattern="yyyy-MM-dd")//定制在接收请求参数时的日期格式

    @JSONField(format="yyyy-MM-dd")//作用在java序列化成json时

    private Date birth;

    private String dateStr;

    public String getDateStr() {

        return dateStr;

    }

    public void setDateStr(String dateStr) {

        this.dateStr = dateStr;

    }

    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;

    }

    public Date getBirth() {

        return birth;

    }

    public void setBirth(Date birth) {

        this.birth = birth;

        SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd");

        this.dateStr=format.format(birth);

    }

    @Override

    public String toString() {

        return "User [id=" + id + ", name=" + name + ", birth=" + birth + "]";

    }

    public User(){}

    public User(Integer id, String name, Date birth) {

        super();

        this.id = id;

        this.name = name;

        this.birth = birth;

    }

}

Class : ValueObject

package com.c61.entity;

import java.util.List;

public class ValueObject{

    private List<User> users;

    private String[] ids;

    public List<User> getUsers() {

        return users;

    }

    public void setUsers(List<User> users) {

        this.users = users;

    }

    public String[] getIds() {

        return ids;

    }

    public void setIds(String[] ids) {

        this.ids = ids;

    }

}

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1.配置web.xml

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

<web-app version="2.5"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

  <display-name></display-name>

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

  <!-- 前端控制器

         /=默认的url-pattern

         /a/b/c  /a

         /a/d/c

         /a/d

         /a

         /

         *注意：此控制器默认加载/WEB-INF下的xxx-servlet.xml文件

                        ：其中xxx等于【DispatcherServlet的配置名】

  -->

  <servlet>

      <servlet-name>mvc61</servlet-name>

      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

      <init-param>

          <param-name>contextConfigLocation</param-name>

          <param-value>classpath:mvc62.xml</param-value>

      </init-param>

      <!-- 随项目启动而启动 -->

      <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>

      <servlet-name>mvc61</servlet-name>

      <url-pattern>/</url-pattern>

  </servlet-mapping>

  <!-- 专治Post请求参数乱码 -->

  <filter>

      <filter-name>encoding61</filter-name>

      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

      <!-- 将请求的编码方式设置为utf-8 -->

      <init-param>

          <param-name>encoding</param-name>

          <param-value>utf-8</param-value>

      </init-param>

  </filter>

  <filter-mapping>

      <filter-name>encoding61</filter-name>

      <url-pattern>/*</url-pattern>

  </filter-mapping>

</web-app>

2.配置控制器

Class ： ParamController

package com.c61.controller;

import java.util.Date;

import org.springframework.format.annotation.DateTimeFormat;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import com.c61.entity.User;

import com.c61.entity.ValueObject;

/**

 *

 * @author admin

 * 收参测试  controller

 */

@Controller

@RequestMapping(value="/mvc")//等价于namespace

public class ParamController {

    /**

     *

     * @param name

     * @param id

     * @param birth

     * @return

     * 零散传参：请求参数和方法参数同名即可

     */

    //url?id=61&name=zhoushanlin&birth=2016/09/29 11:15:40

    @RequestMapping("/param")//等价于<action name="mvc1"

    public String testMVC(String name,Integer id,Date birth){

        System.out.println(name+" "+id+" "+birth);

        return "index";

    }

    /**

     *

     * @param name

     * @param id

     * @param birth

     * @return

     * 零散传参

     * 细节：

     *  @RequestParam(required=true,defaultValue="lime",value="abc")

     *      required=参数是否是必需传递的，如果参数上加了此注解，则required默认为true

     *      defaultValue=参数的默认值，如果参数没有收到数据，则取默认值

     *      value=定制请求参数的名称

     *  @DateTimeFormat(pattern="yyyy-MM-dd")

     *      pattern=定制日期的收参格式

     */

    //url?id=61&name=zhoushanlin&birth=2016/09/29 11:15:40

    @RequestMapping("/param2")//等价于<action name="mvc1"

    public String testMVC2(@RequestParam(required=true,defaultValue="lime") String name,

                           @RequestParam Integer id,

                           @RequestParam(value="b") @DateTimeFormat(pattern="yyyy-MM-dd")Date birth){

        System.out.println(name+" "+id+" "+birth);

        return "index";

    }

    /**

     * 以实体为整体

     * url?id=61&name=c61&birth=2016/09/29

     * *请求参数名 要和 实体属性名同名即可

     */

    @RequestMapping("/param3")//等价于<action name="mvc1"

    public String testMVC3(User user){

        System.out.println(user);

        return "index";

    }

    /**

     * url?hobby61=xxx&hobby61=xxx&hobby61=xxxx

     * 以数组为整体1

     */

    @RequestMapping("/param4")//等价于<action name="mvc1"

    public String testMVC4(String[] hobby61){

        for(String hobby:hobby61){

            System.out.println(hobby);

        }

        return "index";

    }

    /**

     * 以集合为整体  (了解)

     * url?users[0].id=1&users[0].name=c61&users[0].birth=2016-09-29

     *     &users[1].id=2&users[1].name=c61&users[1].birth=2016-09-29

     *     &users[2].id=3&users[2].name=c61&users[2].birth=2016-09-29

     */

    @RequestMapping("/param5")//等价于<action name="mvc1"

    public String testMVC5(ValueObject vo61){

        for(User user:vo61.getUsers()){

            System.out.println(user);

        }

        return "index";

    }

}

3 配置视图

View ： index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

    This is my JSP page. <br>

  </body>

</html>

零散收参 : 请求参数名 要和 方法参数名同名即可

View : param.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

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

        <input type="text" name="id"/>

        <input type="text" name="name"/>

        <input type="text" name="birth"/><br/>

        <input type="submit" value="提交"/>

    </form>

  </body>

</html>

Console :

实体为整体收参 : 请求参数名 要和 实体属性名同名即可

View ： param.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

    <form method="post" action="${pageContext.request.contextPath}/mvc/param3">

        <input type="text" name="id"/>

        <input type="text" name="name"/>

        <input type="text" name="birth"/><br/>

        <input type="submit" value="提交"/>

    </form>

  </body>

</html>

Console ：

数组为整体收参 ：

View ： param.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

    <form method="post" action="${pageContext.request.contextPath}/mvc/param4">

        <label><input name="hobby61" type="checkbox" value="hiking" />徒步旅行</label>

        <label><input name="hobby61" type="checkbox" value="swimming" />游泳</label>

        <input type="submit" value="提交"/>

    </form>

  </body>

</html>

Console :

集合为整体收参 ：

View ： param.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

    <form method="post" action="${pageContext.request.contextPath}/mvc/param5">

    用户A：<br>

        <input name="users[0].id" type="text" value="" />

        <input name="users[0].name" type="text" value="" />

        <input name="users[0].birth" type="text" value="" /><br>

    用户B：<br>

        <input name="users[1].id" type="text" value="" />

        <input name="users[1].name" type="text" value="" />

        <input name="users[1].birth" type="text" value="" /><br>

        <input type="submit" value="提交"/>

    </form>

  </body>

</html>

Console :

收参乱码 ：

1>get请求：在服务器的配置中添加URIEncoding="utf-8"

2>post请求：在项目中注册CharacterEncodingFilter

<!-- 专治Post请求参数乱码 -->

  <filter>

      <filter-name>encoding61</filter-name>

      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

      <!-- 将请求的编码方式设置为utf-8 -->

      <init-param>

          <param-name>encoding</param-name>

          <param-value>utf-8</param-value>

      </init-param>

  </filter>

  <filter-mapping>

      <filter-name>encoding61</filter-name>

      <url-pattern>/*</url-pattern>

  </filter-mapping>

啦啦啦

啦啦啦

啦啦啦