Struts2整合JSON
首先在http://code.google.com/p/jsonplugin/downloads/list下载jsonplugin-0.34.jar
之后将jsonplugin-0.34.jar放入WEB-INF/lib中
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之后使用prototype.js
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Action代码
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package com.platform.Action.SDCategory;import java.util.HashMap;import java.util.Map;import com.googlecode.jsonplugin.annotations.JSON;import com.opensymphony.xwork2.ActionSupport;public class JsonExampleAction extends ActionSupport{private String field1;private transient String field2;private String field3;private int[] ints = {10,20};private Map map = new HashMap();private String customName = "fini";public String getField1(){return field1;}public void setField1(String field1){this.field1 = field1;}public String getField2(){return field2;}public void setField2(String field2){this.field2 = field2;}public String getField3(){return field3;}public void setField3(String field3){this.field3 = field3;}public int[] getInts(){return ints;}public void setInts(int[] ints){this.ints = ints;}public Map getMap(){return map;}public void setMap(Map map){this.map = map;}@JSON(name="newName")public String getCustomName(){return customName;}public void setCustomName(String customName){this.customName = customName;}public String execute() throws Exception{map.put("name", "fuck");return SUCCESS;}}?
struts.xml
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<package name="json" extends="json-default"><action name="QueryChildCategory" name="code"><script src="prototype.js" type="text/javascript"></script><script type="text/javascript">function gotClick(){var url = 'JsonExample.action';var params = Form.serialize('form1');var myAjax = new Ajax.Request(url,{method:'post',parameters:params,onComplete:processResponse,asynchronous:true});}function processResponse(request){var json = request.responseText????var jsonData = eval("("+json+")");????document.getElementById("show").innerHTML=jsonData["field1"];}</script><form id="form1" name="form1" method="post"><input type="text" name="field1" id="field1"/><br><input type="text" name="field2" id="field2"/><br><input type="text" name="field3" id="field3"/><br><input type="button" value="提交" onClick="gotClick();"/></form><div id="show"></div>?
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?或链接调用
script src="prototype.js" type="text/javascript"></script><script type="text/javascript">function gotClick(){var url = 'JsonExample.action?no-cache='+Math.random();var params = "";var myAjax = new Ajax.Request(url,{method:'get',parameters:params,onComplete:processResponse});}function processResponse(request){var json = request.responseTextvar jsonData = eval("("+json+")");//document.getElementById("show").innerHTML=jsonData["fuck"];document.getElementById("show").innerHTML=request.responseText;}</script><a href="javascript:void(0)" onclick="gotClick();">afafa</a><div id="show"></div>?var url = 'JsonExample.action?no-cache='+Math.random();无缓存
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由于json-plugin会把action中的所有getter方法的属性序列化成json串，所以在整合spring开发时，需要将action中service对象的getter方法去掉，或者在前面增加@JSON(serialize=false)，否则页面会报错com.googlecode.jsonplugin.JSONException: java.lang.reflect.InvocationTargetException