Ajax跨域请求的解决

最新推荐文章于 2024-10-24 09:55:22 发布

懒企鹅

最新推荐文章于 2024-10-24 09:55:22 发布

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本文链接：https://blog.youkuaiyun.com/qq_24949727/article/details/51006943

test-client的index.jsp里面的Ajax访问test-service的Controller

Controller返回json时无法接接收，JSONP方式处理后可接收

Client:

<%@ 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>jquery--getJSON方法实现ajax功能</title>
        <script type="text/javascript" src="jquery.js"></script>
        <script type="text/javascript">
		/**
			页面加载完立即执行
		*/
        $(function(){
        	//alert("JJJ");
			$.getJSON("http://127.0.0.1:8080/test-service/json?callback=?&id=123&age=22", function(data) {
				
                alert(data.name);
             });
		
		});
            
        </script>
		
		
		    <script type="text/javascript">
			/**
			触发执行
			*/
            /*$(function() {
                $("#button1").click(function() {
                  
                    //打开文件，并通过回调函数处理获取的数据
                    $.getJSON("userInfo.json", function(data) {
                        alert(data.name);
                    });
                });
            });*/
			</script>		
			

</head>
<body>
	<div class="divTitle">
            <input type="button" id="button1" value="获取数据"/>
        </div>
        <div id="divTip"></div>
		
	
</body>
</html>

Service:

package com.xh.controller;

import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;



@Controller
public class JsonController {
	//@RequestMapping("/json")
	@RequestMapping(value="/json"/*,produces=MediaType.APPLICATION_JSON_VALUE+";charset=utf-8"*/)
	@ResponseBody
	public String getJson(String id,String callback,String age )
	{
		System.out.println("id:"+id);
		System.out.println("age:"+age);
		String json="{'name':'zhangs121212andsads'}";
		System.out.println(StringUtils.isEmpty(callback));
		System.out.println(json );
		System.out.println(callback );
		if(StringUtils.isEmpty(callback))
		{
			
			return json;
		}
		else
		{
			System.out.println(callback + "(" + json + ");");
			return callback + "(" + json + ");";
		}
		
	}
}

web.xml

<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="taotao" version="2.5">
	<display-name>tets-service</display-name>
	<welcome-file-list>
		
		<welcome-file>index.jsp</welcome-file>
	
	</welcome-file-list>


	<!-- 初始化spring容器 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:spring/ApplicationContext-*.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- 解决post乱码 -->
	<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>


	

	<!-- springmvc的前端控制器 -->
	<servlet>
		<servlet-name>tets-service</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- contextConfigLocation不是必须的， 如果不配置contextConfigLocation， springmvc的配置文件默认在：WEB-INF/servlet的name+"-servlet.xml" -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring/springMVC.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>tets-service</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	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-4.0.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd">
    
    
    <!-- 配置包扫描器 -->    
    
    <context:component-scan base-package="com.xh.controller"></context:component-scan>
    <!-- 配置注解驱动 -->
    
    <mvc:annotation-driven/>
	<!-- 静态资源映射 -->
	<!-- <mvc:resources location="/category.json" mapping="/category.json"/> -->


	
	
</beans>