springMVC_04 Ajax请求 @RequestBody，@ResponseBody 处理JSON格式
springMVC处理Ajax请求，返回JSON格式数据
加入对jackson的依赖，springMVC使用jackson进行JSON数据转换
<!-- json --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-core-asl</artifactId> <version>1.9.10</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.10</version> </dependency>
Controller
package com.gc.springmvc.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 com.gc.springmvc.model.User;
@Controller
public class AjaxController {
@RequestMapping(value="listUser")
public @ResponseBody List<User> listUser() throws Exception {
List<User> users = new ArrayList<User>();
users.add(new User("张三2", "zs"));
users.add(new User("李四", "ls"));
return users;
}
}页面
<%@ 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>Insert title here</title>
</head>
<body>
<div>
<div>
<a href="javascript:void(0)" onclick="sendAjaxReq()">Ajax请求，返回JSON数据</a>
</div>
<div id="users" style="margin-left:50%;font-weight:bold;color:red"></div>
</div>
<!-- Ajax -->
<script type="text/javascript">
function createAjaxObj() {
var req;
if (window.XMLHttpRequest) {
req = new XMLHttpRequest();
} else {
req = new ActiveXObject("Msxml2.XMLHTTP"); //ie
}
return req;
}
function sendAjaxReq() {
var req = createAjaxObj();
req.open("get", "listUser?name=王五&time="+Math.random());
req.setRequestHeader("accept", "application/json");
req.onreadystatechange = function() {
if(req.readyState=4 && req.status==200) {
var result = eval("(" + req.responseText +")");
var divNode = document.getElementById("users");
divNode.innerHTML = "";
for(var index in result) {
var name = result[index].name;
if(index>0) {
name = "<br/>" + name;
}
divNode.innerHTML += name;
}
}
}
req.send(null);
}
</script>
</body>
</html>JSP页面中访问服务器上的静态资源，如js脚本文件
必须配置resource资源，否则按请求一个Controller进行映射处理，导致无法下载
<!-- 配置对静态资源文件的访问不被拦截，如js脚本-->
<mvc:resources location="/script/" mapping="/script/**"/> 相关推荐
kentrl 2020-11-10
结束数据方法的参数，该如何定义？-- 集合为自定义实体类中的结合属性，有几个实体类，改变下标就行了。<input id="add" type="button" value="新增visitor&quo
ajaxyan 2020-11-09
zndy0 2020-11-03
学留痕 2020-09-20
Richardxx 2020-11-09
learningever 2020-09-19
chongxiaocheng 2020-08-16
ajaxhe 2020-08-16
lyqdanang 2020-08-16
curiousL 2020-08-03
TONIYH 2020-07-22
时光如瑾雨微凉 2020-07-19
83510998 2020-07-18
坚持着执着 2020-07-16
jiaguoquan00 2020-07-07
李永毅 2020-07-05
坚持着执着 2020-07-05