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):
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<%@ page language="java" contentType="text/html; charset=UTF-8" |
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pageEncoding="UTF-8"%> |
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
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< html > |
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< head > |
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< meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" > |
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< title >Simpleton Demo | struts+ajax返回json类型数据</ title > |
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< link rel = "shortcut icon" type = "image/x-icon" href = "images/Icon.png" /> |
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< link rel = "stylesheet" type = "text/css" href = "styles/base.css" /> |
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</ head > |
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< body background = "images/bg.gif" > |
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|
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< div id = "div_json" > |
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< h5 >录入数据</ h5 > |
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< br /> |
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< form action = "#" method = "post" > |
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< label for = "name" >姓名:</ label >< input type = "text" name = "name" /> |
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< label for = "age" >年龄:</ label >< input type = "text" name = "age" /> |
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< label for = "position" >职务:</ label >< input type = "text" name = "position" /> |
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< input type = "button" class = "btn" value = "提交结果" /> |
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</ form > |
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< br /> |
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< h5 >显示结果</ h5 > |
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< br /> |
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< ul > |
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< li >姓名:< span id = "s_name" >赞无数据</ span ></ li > |
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< li class = "li_layout" >年龄:< span id = "s_age" >暂无数据</ span ></ li > |
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< li class = "li_layout" >职务:< span id = "s_position" >暂无数据</ span ></ li > |
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</ ul > |
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</ div > |
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|
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< div id = "authorgraph" >< img alt = "" src = "images/autograph.gif" ></ div > |
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|
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< script type = "text/javascript" src = "scripts/jquery-1.8.2.js" ></ script > |
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< script type = "text/javascript" > |
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|
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/* 提交结果,执行ajax */ |
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function btn(){ |
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|
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var $btn = $("input.btn");//获取按钮元素 |
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//给按钮绑定点击事件 |
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$btn.bind("click",function(){ |
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|
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$.ajax({ |
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type:"post", |
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url:"excuteAjaxJsonAction",//需要用来处理ajax请求的action,excuteAjax为处理的方法名,JsonAction为action名 |
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data:{//设置数据源 |
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name:$("input[name=name]").val(), |
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age:$("input[name=age]").val(), |
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position:$("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 |
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}, |
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dataType:"json",//设置需要返回的数据类型 |
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success:function(data){ |
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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 |
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//得到的d是一个形如{"key":"value","key1":"value1"}的数据类型,然后取值出来 |
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|
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$("#s_name").text(""+d.name+""); |
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$("#s_age").text(""+d.age+""); |
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$("#s_position").text(""+d.position+""); |
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|
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}, |
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error:function(){ |
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alert("系统异常,请稍后重试!"); |
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}//这里不要加"," |
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}); |
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}); |
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} |
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|
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/* 页面加载完成,绑定事件 */ |
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$(document).ready(function(){ |
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btn();//点击提交,执行ajax |
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}); |
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</ script > |
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</ body > |
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</ html > |
JsonAction.java代码
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package com.simpleton.demo.action; |
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import java.util.HashMap; |
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import java.util.Map; |
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import javax.servlet.http.HttpServletRequest; |
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import net.sf.json.JSONObject; |
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import org.apache.struts2.interceptor.ServletRequestAware; |
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import com.opensymphony.xwork2.ActionSupport; |
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public class JsonAction extends ActionSupport implements ServletRequestAware{ |
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private static final long serialVersionUID = 1L; |
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|
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private HttpServletRequest request; |
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private String result; |
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public void setServletRequest(HttpServletRequest arg0) { |
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this .request = arg0; |
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} |
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public String getResult() { |
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return result; |
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} |
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public void setResult(String result) { |
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this .result = result; |
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} |
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|
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/** |
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* 处理ajax请求 |
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* @return SUCCESS |
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*/ |
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public String excuteAjax(){ |
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|
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try { |
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//获取数据 |
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String name = request.getParameter( "name" ); |
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int age = Integer.parseInt(request.getParameter( "age" )); |
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String position = request.getParameter( "position" ); |
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|
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//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 |
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Map<String,Object> map = new HashMap<String,Object>(); |
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map.put( "name" , name); |
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map.put( "age" ,age); |
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map.put( "position" , position); |
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|
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JSONObject json = JSONObject.fromObject(map); //将map对象转换成json类型数据 |
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result = json.toString(); //给result赋值,传递给页面 |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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return SUCCESS; |
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} |
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|
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} |
struts.xml中
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<? xml version = "1.0" encoding = "UTF-8" ?> |
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<!DOCTYPE struts PUBLIC |
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"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN" |
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"http://struts.apache.org/dtds/struts-2.0.dtd"> |
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< struts > |
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|
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<!--解决乱码 --> |
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< constant name = "struts.i18n.encoding" value = "UTF-8" ></ constant > |
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|
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< package name = "simpleton" extends = "struts-default,json-default" > |
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|
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< action name = "*JsonAction" method = "{1}" class = "com.simpleton.demo.action.JsonAction" > |
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< result name = "fail" ></ result > |
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<!-- 返回json类型数据 --> |
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< result type = "json" > |
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< 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 > |
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</ result > |
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</ action > |
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|
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</ package > |
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|
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</ struts > |
这样就可以完成一个简单json数据类型传递的demo了。
JS获取URL参数的两种方法
/*
*第一种方法:获取url的参数
***************************/
function
GetQueryString(name){
var
reg =
new
RegExp(
"(^|&)"
+ name +
"=([^&]*)(&|$)"
);
var
r = window.location.search.substr(1).match(reg);
if
(r!=
null
)
return
unescape(r[2]);
return
null
;
}
// 调用方法
alert(GetQueryString(
"参数名1"
));
/*
*第二种方法:获取url的参数
***************************/
UrlParse =
function
() {
this
.host = location.host;
//this.GET = _GET();
this
.url = location.herf;
this
.hash = location.hash;
this
.port = location.port;
this
.script_name = location.pathname;
this
.quartyString = location.search;
this
.protocol = location.protocol;
this
.GET =
this
.parseArguement();
}
UrlParse.prototype = {
parseArguement:
function
(){
var
pos;
var
arg =
new
Object();
var
quire = location.search.substring(1);
var
pair = quire.split(
"&"
);
if
(pair.length > 0)
{
for
(
var
i=0;i < pair.length ;i++)
{
pos = pair[i].indexOf(
"="
);
if
(pos == -1)
continue
;
argName = pair[i].substring(0,pos);
argValue = pair[i].substring(pos+1);
arg[argName] = argValue;
}
}
else
{
de = quire.indexOf(
"="
);
if
(de != -1)
{
argName = pair[i].substring(0,de);
argValue = pair[i].substring(de+1);
arg[argName] = argValue;
}
}
return
arg;
}
}
var
Url =
new
UrlParse();
alert(Url.GET);
for
(key
in
Url.GET)
{
document.write(key +
" : "
+ Url.GET[key]);
}