Spring MVC--使用Jackson返回JSON格式数据

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a772304419 2021-07-06 16:31:36 ©著作权

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使用Jackson返回JSON格式数据

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>测试返回JSON格式的数据</title>
<script type="text/javascript" src="js/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="js/json2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
	testResponseBody();
});
function testResponseBody(){
	$.post("${pageContext.request.contextPath}/json/testRequestBody",null,
			function(data){ 
		$.each(data,function(){
			var tr  = $("<tr align='center'/>");
            $("<td/>").html(this.id).appendTo(tr);
            $("<td/>").html(this.name).appendTo(tr);
            $("<td/>").html(this.author).appendTo(tr);
            $("#booktable").append(tr);
        })
	},"json");
}
</script>
</head>
<body>
<table id="booktable" border="1"  style="border-collapse: collapse;">
	<tr align="center">
	  <th>编号</th>
	  <th>书名</th>
	  <th>作者</th>
	</tr>
	
</table>
	
</body>
</html>

BookController.java


package org.zhangxueliang.controller;

import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.zhangxueliang.domain.Book;

@Controller
@RequestMapping("/json")
public class BookController {
	
	
    @RequestMapping(value="/testRequestBody")
    // @ResponseBody会将集合数据转换json格式返回客户端
    @ResponseBody
    public Object getJson() {
    	List<Book> list = new ArrayList<Book>();
    	list.add(new Book(1,"水浒传","施耐庵"));
    	list.add(new Book(2,"三国演义","罗贯中"));
    	list.add(new Book(3,"西游记","吴承恩"));
    	list.add(new Book(4,"红楼梦","曹雪芹"));
    	return list;
    }

}

Book.java


package org.zhangxueliang.domain;

import java.io.Serializable;

public class Book implements Serializable {

	private Integer id;
	private String name;
	private String author;

	public Book() {
		super();
		// TODO Auto-generated constructor stub
	}

	public Book(Integer id, String name, String author) {
		super();
		this.id = id;
		this.name = name;
		this.author = author;
	}

	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 String getAuthor() {
		return author;
	}

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

	@Override
	public String toString() {
		return "Book [id=" + id + ", name=" + name + ", author=" + author + "]";
	}

}

springmvc-config.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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd     
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.2.xsd">
        
    <!-- spring可以自动去扫描base-pack下面的包或者子包下面的java文件，
    	如果扫描到有Spring的相关注解的类，则把这些类注册为Spring的bean -->
    <context:component-scan base-package="org.zhangxueliang.controller"/>
	<!-- 设置配置方案 -->
    <mvc:annotation-driven/>
	<!-- 使用默认的Servlet来响应静态文件 -->
    <mvc:default-servlet-handler/>
	
    
    <!-- 视图解析器  -->
     <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
        <!-- 前缀 -->
        <property name="prefix">
            <value>/WEB-INF/content/</value>
        </property>
        <!-- 后缀 -->
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>
    
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
	http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 
	id="WebApp_ID" version="3.1">
	<!-- 定义Spring MVC的前端控制器 -->
  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/springmvc-config.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <!-- 让Spring MVC的前端控制器拦截所有请求 -->
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  <!-- 编码过滤器 -->
  <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>
 </filter>
	<filter-mapping>
		<filter-name>characterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
	
</web-app>