springmvc处理ajax请求
1.controller将数据封装成json格式返回页面
@RequestMapping("/dataList")
public void datalist(CsoftCunstomerPage page,HttpServletResponse response) throws Exception{
List<CsoftCunstomer> dataList = csoftCunstomerService.queryByList(page);
//设置页面数据
Map<String,Object> jsonMap = new HashMap<String,Object>();
jsonMap.put("total",page.getPager().getRowCount());
jsonMap.put("rows", dataList);
try {
//设置页面不缓存
response.setContentType("application/json");
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setCharacterEncoding("UTF-8");
PrintWriter out= null;
out = response.getWriter();
out.print(JSONUtil.toJSONString(jsonMap));
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
2.ajax提交数据以json格式到controller中
例一:
<!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" />
<!--<script type="text/javascript" src="../static/js/jquery-1.7.2.min.js"></script>-->
<!--JS的地址可以写成下面这样，将来部署的时候，这些静态文件就可以单独部署了，不依赖于后台路径-->
<script type="text/javascript" src="http://localhost:8080/sshdemo/static/js/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
ajaxRequest();
});
function ajaxRequest() {
$.ajax({
url: "http://localhost:8080/sshdemo/hello/ajax",
type: "POST",
dataType: "json",
data: {
"a": 1,
"b": 2,
"c": 3
},
async: false,
success: function(data) {
alert("success");
$.each(data, function(index, element) {
alert(element.a);
alert(element.b);
alert(element.c);
});
},
error: function() {
alert("error");
}
});
}
</script>
</head>
<body>
<div>Hello World!</div>
</body>
</html>
package com.xbs.ready.ssh.controller;
import com.alibaba.fastjson.JSON;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
/**
*
* @author xbs
*/
@Controller
@RequestMapping("hello")
public class HelloController {
/**
* ajax请求不需要返回页面，只需要得到response中的数据即可，所以方法签名为void即可
*
* @param request
* @param response
*/
@RequestMapping(value = "ajax", method = RequestMethod.POST)
public void ajaxDatas(HttpServletRequest request, HttpServletResponse response) {
String jsonResult = getJSONString(request);
renderData(response, jsonResult);
}
private String getJSONString(HttpServletRequest request) {
//故意构造一个数组，使返回的数据为json数组，数据更复杂些
List<Map<String, Object>> datas = new ArrayList<Map<String, Object>>(5);
Map<String, Object> map1 = new HashMap<String, Object>(10);
//可以获得ajax请求中的参数
map1.put("a", request.getParameter("a"));
map1.put("b", request.getParameter("b"));
map1.put("c", request.getParameter("c"));
datas.add(map1);
//故意构造一个数组，使返回的数据为json数组，数据更复杂些
Map<String, Object> map2 = new HashMap<String, Object>(10);
map2.put("a", "11");
map2.put("b", "22");
map2.put("c", "33");
datas.add(map2);
String jsonResult = JSON.toJSONString(datas);
return jsonResult;
}
/**
* 通过PrintWriter将响应数据写入response，ajax可以接受到这个数据
*
* @param response
* @param data
*/
private void renderData(HttpServletResponse response, String data) {
PrintWriter printWriter = null;
try {
printWriter = response.getWriter();
printWriter.print(data);
} catch (IOException ex) {
Logger.getLogger(HelloController.class.getName()).log(Level.SEVERE, null, ex);
} finally {
if (null != printWriter) {
printWriter.flush();
printWriter.close();
}
}
}
}
例二:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
<head>
<title>helloworld</title>
<script type="text/javascript" src="/spring_mvc/js/jquery.js"></script>
<script type="text/javascript">
$(function(){
$("#testButton").click(function(){
var $a = $(this);
$.ajax({
url:"/spring_mvc/testAjax.do",
type:'post',
data:'name=admin&password=123456',
dataType:'html',
success:function(data,status){
if(status == "success"){
var objs = jQuery.parseJSON(data);
var str = "";
for(var i=0;i<objs.length;i++){
str = str + objs[i].activityName+" ";
}
$("#content").html(str);
}
},
error:function(xhr,textStatus,errorThrown){
}
});
});
});
</script>
</head>
<body>
<button id="testButton">异步传输</button>
<div id="content"></div>
</body>
</html>
public class TestAjaxAction implements Controller {
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
response.setCharacterEncoding("UTF-8");
String name = request.getParameter("name");
String password = request.getParameter("password");
System.out.println(name+" : "+password);
PrintWriter out = response.getWriter();
List<Map<String,String>> list = new ArrayList<Map<String,String>>();
Map<String,String> m1 = new HashMap<String,String>();
m1.put("activityId", "000001");
m1.put("activityName", "阿斯蒂芬1");
Map<String,String> m2 = new HashMap<String,String>();
m2.put("activityId", "000002");
m2.put("activityName", "阿斯蒂芬2");
Map<String,String> m3 = new HashMap<String,String>();
m3.put("activityId", "000003");
m3.put("activityName", "阿斯蒂芬3");
Map<String,String> m4 = new HashMap<String,String>();
m4.put("activityId", "000004");
m4.put("activityName", "阿斯蒂芬4");
Map<String,String> m5 = new HashMap<String,String>();
m5.put("activityId", "000005");
m5.put("activityName", "阿斯蒂芬5");
list.add(m1);
list.add(m2);
list.add(m3);
list.add(m4);
list.add(m5);
String s = JSONArray.fromObject(list).toString();
out.print(s);
out.close();
return null;
}
}
例三:
@RequestMapping("/dataList")
public void datalist(CsoftCunstomerPage page,HttpServletResponse response) throws Exception{
List<CsoftCunstomer> dataList = csoftCunstomerService.queryByList(page);
//设置页面数据
Map<String,Object> jsonMap = new HashMap<String,Object>();
jsonMap.put("total",page.getPager().getRowCount());
jsonMap.put("rows", dataList);
try {
//设置页面不缓存
response.setContentType("application/json");
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setCharacterEncoding("UTF-8");
PrintWriter out= null;
out = response.getWriter();
out.print(JSONUtil.toJSONString(jsonMap));
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
