实现SpringMVC数据绑定

SpringMVC数据绑定的使用

数据绑定即是将HTTP请求中的参数绑定到Handler业务方法的形参

常用的数据绑定类型

基本数据类型
包装类
数组
对象
集合（List，Set，Map）
JSON

话不多说，上代码：

项目结构如下所示：

第一步：编写Controller类：

package com.imooc.controller;

import com.imooc.dao.CourseDAO;
import com.imooc.entity.Course;
import com.imooc.entity.CourseList;
import com.imooc.entity.CourseMap;
import com.imooc.entity.CourseSet;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

/**
 * Created by Administrator.
 */
@Controller
public class DataBindController {

    @Autowired
    private CourseDAO courseDAO;

    //基本数据类型测试
    @RequestMapping(value = "/baseType")
    @ResponseBody
    public String baseType(@RequestParam(value = "id") int id){
        return "id:"+id;
    }
    //包装类测试
    @RequestMapping(value = "/packageType")
    @ResponseBody
    public String packageType(@RequestParam(value = "id") Integer id){
        return "id:"+id;
    }
    //数组测试
    @RequestMapping(value = "/arrayType")
    @ResponseBody
    public String arrayType(String[] name){
        StringBuffer sbf = new StringBuffer();
        for (String item:name){
            sbf.append(item).append(" ");
        }
        return sbf.toString();
    }
    //
    @RequestMapping(value = "/pojoType")
    public ModelAndView pojoType(Course course){
        courseDAO.add(course);
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("index");
        modelAndView.addObject("courses",courseDAO.getAll());
        return modelAndView;
    }

    @RequestMapping(value = "/listType")
    public ModelAndView listType(CourseList courseList){
        for(Course course:courseList.getCourses()){
            courseDAO.add(course);
        }
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("index");
        modelAndView.addObject("courses",courseDAO.getAll());
        return modelAndView;
    }

    @RequestMapping(value = "/mapType")
    public ModelAndView mapType(CourseMap courseMap){
        for(String key:courseMap.getCourses().keySet()){
            Course course = courseMap.getCourses().get(key);
            courseDAO.add(course);
        }
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("index");
        modelAndView.addObject("courses",courseDAO.getAll());
        return modelAndView;
    }

    @RequestMapping(value = "/setType")
    public ModelAndView setType(CourseSet courseSet){
        for (Course course:courseSet.getCourses()){
            courseDAO.add(course);
        }
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("index");
        modelAndView.addObject("courses",courseDAO.getAll());
        return modelAndView;
    }

    @RequestMapping(value = "/jsonType")
    @ResponseBody
    public  Course jsonType(@RequestBody  Course course){
        course.setPrice(course.getPrice()+100);
        return course;
    }
}

第二步：创建实体类：

Author类：

package com.imooc.entity;

/**
 * Created by Administrator.
 */
public class Author {
    private int id;
    private String name;

    public String getName() {
        return name;
    }

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

    public int getId() {
        return id;
    }

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

Course类：

package com.imooc.entity;

/**
 * Created by Administrator.
 */
public class Course {
    private int id;
    private String name;
    private double price;
    private Author author;

    public String getName() {
        return name;
    }

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

    public int getId() {
        return id;
    }

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

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public Author getAuthor() {
        return author;
    }

    public void setAuthor(Author author) {
        this.author = author;
    }
}

Course类和Author类设置级联，往Course类里面传入Author对象

CourseList类：

package com.imooc.entity;

import java.util.List;

/**
 * Created by Administrator.
 */
public class CourseList {
    private List<Course> courses;

    public List<Course> getCourses() {
        return courses;
    }

    public void setCourses(List<Course> courses) {
        this.courses = courses;
    }
}

CourseMap类:

package com.imooc.entity;

import java.util.Map;

/**
 * Created by Administrator.
 */
public class CourseMap {
    private Map<String,Course> courses;

    public void setCourses(Map<String, Course> courses) {
        this.courses = courses;
    }

    public Map<String, Course> getCourses() {
        return courses;
    }
}

CourseSet类：

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package com.imooc.entity;

import java.util.HashSet;
import java.util.Set;

/**
 * Created by Administrator.
 */
public class CourseSet {
    private Set<Course> courses = new HashSet<Course>();

    public void setCourses(Set<Course> courses) {
        this.courses = courses;
    }

    public Set<Course> getCourses() {
        return courses;
    }

    public  CourseSet(){
        courses.add(new Course());
        courses.add(new Course());
    }
}

第三步：创建一个CouserDao类：

package com.imooc.dao;

import com.imooc.entity.Course;
import org.springframework.stereotype.Repository;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by Administrator.
 */
@Repository
public class CourseDAO {

    private Map<Integer,Course> courses = new HashMap<Integer, Course>();

    public void add(Course course){
        courses.put(course.getId(),course);
    }

    public Collection<Course> getAll(){
        return courses.values();
    }

}

第四步：编写前端jsp页面

add.jsp,代码如下所示：

<%--
  Created by IntelliJ IDEA.
  User: Administrator.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>add</title>
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        body{
            overflow-x:hidden;
        }
        #main{
            width:1200px;
            height:600px;
            margin-left:500px;
        }
    </style>
</head>
<body>

<div id="main">
    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>添加课程</h1>
        </div>
    </div>
     <!--提交给我pojoType-->
    <form class="form-horizontal" role="form" action="pojoType" method="post">
        <div class="form-group">
            <label class="col-sm-1 control-label">课程编号</label>
            <div class="col-sm-3">
                <!--name即为couser.id -->
                <input type="text" class="form-control" name="id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="author.id" placeholder="请输入讲师编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师姓名</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="author.name" placeholder="请输入讲师姓名">
            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-1 col-sm-3">
                <button type="submit" class="btn btn-default">提交</button>
            </div>
        </div>
    </form>
</div>
</body>
</html>

addList.jsp:

<%--
  Created by IntelliJ IDEA.
  User: Administrator.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>add</title>
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        body{
            overflow-x:hidden;
        }
        #main{
            width:1200px;
            height:600px;
            margin-left:500px;
        }
    </style>
</head>
<body>

<div id="main">
    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>添加课程</h1>
        </div>
    </div>

    <form class="form-horizontal" role="form" action="listType" method="post">
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[0].id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[0].name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[0].price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[0].author.id" placeholder="请输入讲师编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师姓名</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[0].author.name" placeholder="请输入讲师姓名">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[1].id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[1].name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[1].price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[1].author.id" placeholder="请输入讲师编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师姓名</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses[1].author.name" placeholder="请输入讲师姓名">
            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-1 col-sm-3">
                <button type="submit" class="btn btn-default">提交</button>
            </div>
        </div>
    </form>
</div>
</body>
</html>

addMap.jsp:

<%--
  Created by IntelliJ IDEA.
  User: Administrator.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>add</title>
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        body{
            overflow-x:hidden;
        }
        #main{
            width:1200px;
            height:600px;
            margin-left:500px;
        }
    </style>
</head>
<body>

<div id="main">
    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>添加课程</h1>
        </div>
    </div>

    <form class="form-horizontal" role="form" action="mapType" method="post">
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].author.id" placeholder="请输入讲师编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师姓名</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].author.name" placeholder="请输入讲师姓名">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].author.id" placeholder="请输入讲师编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师姓名</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].author.name" placeholder="请输入讲师姓名">
            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-1 col-sm-3">
                <button type="submit" class="btn btn-default">提交</button>
            </div>
        </div>
    </form>
</div>
</body>
</html>

addset.jsp:

<%--
  Created by IntelliJ IDEA.
  User: Administrator.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>add</title>
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <style type="text/css">
        body{
            overflow-x:hidden;
        }
        #main{
            width:1200px;
            height:600px;
            margin-left:500px;
        }
    </style>
</head>
<body>

<div id="main">
    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>imooc-添加课程</h1>
        </div>
    </div>

    <form class="form-horizontal" role="form" action="mapType" method="post">
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程1价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].author.id" placeholder="请输入讲师编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师姓名</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['one'].author.name" placeholder="请输入讲师姓名">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].id" placeholder="请输入课程编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2名称</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].name" placeholder="请输入课程名称">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">课程2价格</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].price" placeholder="请输入课程价格">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师编号</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].author.id" placeholder="请输入讲师编号">
            </div>
        </div>
        <div class="form-group">
            <label class="col-sm-1 control-label">讲师姓名</label>
            <div class="col-sm-3">
                <input type="text" class="form-control" name="courses['two'].author.name" placeholder="请输入讲师姓名">
            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-1 col-sm-3">
                <button type="submit" class="btn btn-default">提交</button>
            </div>
        </div>
    </form>
</div>
</body>
</html>

index.jsp:

<%--
  Created by IntelliJ IDEA.
  User: Administrator.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
    <title>课程列表</title>
    <link href="css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">

    <!-- 标题 -->
    <div class="row">
        <div class="col-md-12">
            <h1>课程管理</h1>
        </div>
    </div>
    <!-- 显示表格数据 -->
    <div class="row">
        <div class="col-md-12">
            <table class="table table-hover" id="emps_table">
                <thead>
                <tr>
                    <th>
                        <input type="checkbox" id="check_all"/>
                    </th>
                    <th>编号</th>
                    <th>课程名</th>
                    <th>价格</th>
                    <th>讲师</th>
                    <th>操作</th>
                </tr>
                </thead>
                <tbody>
                <c:forEach items="${courses}" var="course">
                    <tr>
                        <td><input type='checkbox' class='check_item'/></td>
                        <td>${course.id}</td>
                        <td>${course.name}</td>
                        <td>${course.price}</td>
                        <td>${course.author.name}</td>
                        <td>
                            <button class="btn btn-primary btn-sm edit_btn">
                                <span class="glyphicon glyphicon-pencil">编辑</span>
                            </button>&nbsp;&nbsp;
                            <button class="btn btn-danger btn-sm delete_btn">
                                <span class="glyphicon glyphicon-trash">删除</span>
                            </button>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>

</div>
</body>
</html>

json.jsp:

<%--
  Created by IntelliJ IDEA.
  User: Administrator.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
<script type="text/javascript">

    $(function(){
        var course = {
            "id":"8",
            "name":"SSM框架整合",
            "price":"200"
        };
        $.ajax({
            url:"jsonType",
            data:JSON.stringify(course),
            type:"post",
            contentType:"application/json;charse=UTF-8",
            dataType:"json",
            success:function(data){
                alert(data.name+"---"+data.price);
            }
        })
    })

</script>
<body>

</body>
</html>

pom.xml:

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.imooc</groupId>
  <artifactId>SpringMVCDataBind</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>SpringMVCDataBind Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.1.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.8.3</version>
    </dependency>

    <!-- JSTL -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

  </dependencies>
  <build>
    <finalName>SpringMVCDataBind</finalName>
  </build>
</project>

运行效果如下所示：

纪文啊！

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私信关注

实现SpringMVC数据绑定

数据绑定即是将HTTP请求中的参数绑定到Handler业务方法的形参

常用的数据绑定类型

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