Spring MVC系列：（11）返回JSON
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1、引入jar包
jackson-core-asl-1.9.11.jar
jackson-mapper-asl-1.9.11.jar
2、配置springmvc.xml
<!-- 基于注解的适配器 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean> </list> </property> </bean>
3、Action代码
@RequestMapping(value="/test")
public @ResponseBody User test() throws Exception{
User user = new User();
user.setId(99);
user.setName("小明");
user.setSal(8888.88);
user.setHiredate(new Date());
return user;
}4、JSP页面
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta name="content-type" content="text/html; charset=UTF-8"> <title>Index Page</title> <script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.12.3.js"></script> <script type="text/javascript"> $(function(){ $(‘#btn‘).click(function(){ $.ajax({ "url":"${pageContext.request.contextPath}/user/test.action", success:function(result){ var str = ""; str += result.id + "\n"; str += result.name + "\n"; str += result.sal + "\n"; str += result.hiredate + "\n"; var millisec = result.hiredate; var date = new Date(); date.setTime(millisec); str += date.getFullYear() + "-" + date.getMonth() + "-" + date.getDate(); alert(str); } }); }); }); </script> </head> <body> <input id="btn" type="button" value="GetJson"/> </body> </html>
完整的UserAction.java
package com.rk.action;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.rk.entity.User;
@Controller
@RequestMapping(value="/user")
public class UserAction {
@InitBinder
private void initBinder(ServletRequestDataBinder binder){
binder.registerCustomEditor(
Date.class,
new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"), true));
}
@RequestMapping(value="/delete")
public String delete(int id) throws Exception{
System.out.println("删除用户->" + id);
//转发到find(int)
//return "forward:/user/find.action";
//重定向到find(int)
return "redirect:/user/find.action?id=4";
}
@RequestMapping(value="/test")
public @ResponseBody User test() throws Exception{
User user = new User();
user.setId(99);
user.setName("小明");
user.setSal(8888.88);
user.setHiredate(new Date());
return user;
}
}完整的springmvc.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- <import resource="com/rk/config/spring-test.xml"/> --> <!-- Action控制器 --> <context:component-scan base-package="com.rk.action"></context:component-scan> <!-- 基于注解的映射器(可选) --> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/> <!-- 基于注解的适配器 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean> </list> </property> </bean> <!-- 视图解析器(可选) --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"/> </beans>
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