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使用fastjson与SpringMVC实现自定义HttpMessageConverter接收和获取JSON格式的数据

2017-03-28 10:53 886 查看

1.下载Spring、fastjson的jar包以及jQuery和json2的js文件，向项目的WEB-INF/lib目录加入Spring和fastjson的jar包，在WebContent目录下创建一个js文件夹，向js文件夹中加入jQuery和json2的js文件。

2.配置web.xml：配置SpringMVC前端控制器

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>FastjsonRequestTest</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>

<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>

3.编写实体类（bean）：

package com.domain;

import java.io.Serializable;

public class Book implements Serializable{

private Integer id;
private String name;
private String author;
public Book() {
// TODO Auto-generated constructor stub
}
public Book(Integer id,String name, String author) {
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 + "]";
}

}

4.编写index.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>测试接收JSON格式的数据</title>
<script type="text/javascript" src="js/jquery-3.2.0.min.js"></script>
<script type="text/javascript" src="js/json2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#btn").click(testRequestBody);
});
function testRequestBody(){
$.ajax("testRequestBody.action",
{
dataType : "json",
type : "post",
contentType : "application/json",
data : JSON.stringify({"id" : 1, "name" : "Spring MVC学习"}),
async : true,
success : function(data){
console.log(data);
$("#id").html(data.id);
$("#name").html(data.name);
$("#author").html(data.author);
},
error:function(){
alert("数据发送失败");
}
});
}
</script>
</head>
<body>
<button id="btn">点击</button><br>
编号：<span id="id"></span><br>
书名：<span id="name"></span><br>
作者：<span id="author"></span><br>
</body>
</html>

5.编写handler处理器：BookController.java

package com.controller;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;

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

import com.alibaba.fastjson.JSONObject;
import com.domain.Book;

@Controller
public class BookController {

@RequestMapping(value="/testRequestBody")
public void setJson(
@RequestBody Book book,
HttpServletResponse response
) throws IOException{
book.setAuthor("张三");
response.setContentType("text/html;charset=UTF-8");
//JSONobject-lib包是一个beans，collections，maps，java arrays和xml与JSON互相转换的包
//使用JSONobject将book对象转换成json写出到客户端
PrintWriter out = response.getWriter();
out.println(JSONObject.toJSONString(book));
}
}

6.配置SpringMVC配置文件：springmvc.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:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:c="http://www.springframework.org/schema/c"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">

<context:component-scan base-package="com.controller"/>

<mvc:annotation-driven>

<mvc:message-converters register-defaults="false">

<bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
<bean class="org.springframework.http.converter.xml.XmlAwareFormHttpMessageConverter"/>
<bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>
&l
a84c
t;bean class="org.springframework.http.converter.BufferedImageHttpMessageConverter"/>


<bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">

<property name="supportedMediaTypes">
<list>

<value>text/html;charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>

<mvc:default-servlet-handler/>

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">


<property name="suffix">
<value>.jsp</value>
</property>
</bean>

</beans>

执行前index.jsp显示如下：

执行点击后，结果如下：

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标签： spring mvc 注解 xml fastjson json

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