网上看到很多关于Struts2+ajax+jquery+json的例子,但是很多都不完整,也看不明白,主要原因是返回jsno类型数据和原来的返回字符串类型数据不一样,并且网友们实现步骤没有说清楚,让初学的朋友捉摸不透到底该怎么做。
我做了个简单的demo,供网友们学习,最后我会附上链接,可以下载整个demo.
首先需要的包(struts核心包和json需要的包):
struts核心包:
json需要的包:
commons-logging-*.jar在导入struts核心包的时候就导入了,所以导入json包的时候可以去掉这个包
页面效果:
json_demo.jsp页面(该页面引用了jquery文件,我用的版本是jquery-1.8.2.js,如果使用版本不同,请自行修改):
01 | <%@ page language="java" contentType="text/html; charset=UTF-8" |
02 | pageEncoding="UTF-8"%> |
03 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
06 | < meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" > |
07 | < title >Simpleton Demo | struts+ajax返回json类型数据</ title > |
09 | < link rel = "shortcut icon" type = "image/x-icon" href = "images/Icon.png" /> |
10 | < link rel = "stylesheet" type = "text/css" href = "styles/base.css" /> |
13 | < body background = "images/bg.gif" > |
18 | < form action = "#" method = "post" > |
19 | < label for = "name" >姓名:</ label >< input type = "text" name = "name" /> |
20 | < label for = "age" >年龄:</ label >< input type = "text" name = "age" /> |
21 | < label for = "position" >职务:</ label >< input type = "text" name = "position" /> |
22 | < input type = "button" class = "btn" value = "提交结果" /> |
28 | < li >姓名:< span id = "s_name" >赞无数据</ span ></ li > |
29 | < li class = "li_layout" >年龄:< span id = "s_age" >暂无数据</ span ></ li > |
30 | < li class = "li_layout" >职务:< span id = "s_position" >暂无数据</ span ></ li > |
34 | < div id = "authorgraph" >< img alt = "" src = "images/autograph.gif" ></ div > |
36 | < script type = "text/javascript" src = "scripts/jquery-1.8.2.js" ></ script > |
37 | < script type = "text/javascript" > |
42 | var $btn = $("input.btn");//获取按钮元素 |
44 | $btn.bind("click",function(){ |
48 | url:"excuteAjaxJsonAction",//需要用来处理ajax请求的action,excuteAjax为处理的方法名,JsonAction为action名 |
50 | name:$("input[name=name]").val(), |
51 | age:$("input[name=age]").val(), |
52 | position:$("input[name=position]").val()//这里不要加"," 不然会报错,而且根本不会提示错误地方 |
54 | dataType:"json",//设置需要返回的数据类型 |
55 | success:function(data){ |
56 | var d = eval("("+data+")");//将数据转换成json类型,可以把data用alert()输出出来看看到底是什么样的结构 |
57 | //得到的d是一个形如{"key":"value","key1":"value1"}的数据类型,然后取值出来 |
59 | $("#s_name").text(""+d.name+""); |
60 | $("#s_age").text(""+d.age+""); |
61 | $("#s_position").text(""+d.position+""); |
72 | $(document).ready(function(){ |
JsonAction.java代码
01 | package com.simpleton.demo.action; |
03 | import java.util.HashMap; |
06 | import javax.servlet.http.HttpServletRequest; |
08 | import net.sf.json.JSONObject; |
10 | import org.apache.struts2.interceptor.ServletRequestAware; |
12 | import com.opensymphony.xwork2.ActionSupport; |
14 | public class JsonAction extends ActionSupport implements ServletRequestAware{ |
15 | private static final long serialVersionUID = 1L; |
17 | private HttpServletRequest request; |
18 | private String result; |
20 | public void setServletRequest(HttpServletRequest arg0) { |
23 | public String getResult() { |
26 | public void setResult(String result) { |
34 | public String excuteAjax(){ |
38 | String name = request.getParameter( "name" ); |
39 | int age = Integer.parseInt(request.getParameter( "age" )); |
40 | String position = request.getParameter( "position" ); |
42 | //将数据存储在map里,再转换成json类型数据,也可以自己手动构造json类型数据 |
43 | Map<String,Object> map = new HashMap<String,Object>(); |
44 | map.put( "name" , name); |
46 | map.put( "position" , position); |
48 | JSONObject json = JSONObject.fromObject(map); //将map对象转换成json类型数据 |
49 | result = json.toString(); //给result赋值,传递给页面 |
50 | } catch (Exception e) { |
struts.xml中
01 | <? xml version = "1.0" encoding = "UTF-8" ?> |
02 | <!DOCTYPE struts PUBLIC |
03 | "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN" |
04 | "http://struts.apache.org/dtds/struts-2.0.dtd"> |
08 | < constant name = "struts.i18n.encoding" value = "UTF-8" ></ constant > |
10 | < package name = "simpleton" extends = "struts-default,json-default" > |
12 | < action name = "*JsonAction" method = "{1}" class = "com.simpleton.demo.action.JsonAction" > |
13 | < result name = "fail" ></ result > |
16 | < param name = "root" >result <!-- result是action中设置的变量名,也是页面需要返回的数据,该变量必须有setter和getter方法 --> </ param > |
这样就可以完成一个简单json数据类型传递的demo了。