1、json的官网：http://www.json.org/

2、使用java的jar包：http://json-lib.sourceforge.net/

这个包依赖的东西比较多，官网介绍如下：

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Json-lib requires (at least) the following dependencies in your classpath:

• jakarta commons-lang 2.5
• jakarta commons-beanutils 1.8.0
• jakarta commons-collections 3.2.1
• jakarta commons-logging 1.1.1
• ezmorph 1.0.6
  

3、从业务逻辑层获取数据形成json格式的字符串

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//stageList就是我们从业务逻辑层中获取的数据
private String parseStageToStr(List<Stage> stageList) {
		
		StringBuilder sb = new StringBuilder(200);
		if(CollectionUtils.isEmpty(stageList)) {
			return "";
		}
		int size = stageList.size();
		
		for(int i = 0; i < size; i++) {
			Stage s = stageList.get(i);
			sb.append(s.getStageId() + ":{");
			StringBuilder tmp = new StringBuilder(200);
			tmp.append("projectId:\""+ (s.getProjectId())+"\",");
			tmp.append("subProjectId:\""+(s.getSubProjectId())+"\",");
			tmp.append("stageNameId:\""+(s.getStageNameId())+"\",");
			tmp.append("psName:\"" + (s.getPsName()==null?"":s.getPsName())+"\",");
			tmp.append("planFromDate:\"" + (DateUtil.dateToStr(s.getPlanFromDate()))+"\",");
			tmp.append("planToDate:\"" + (DateUtil.dateToStr(s.getPlanToDate()))+"\",");
			tmp.append("stageLogId:\"" + (s.getStageLogId())+"\"");
			//tmp.append("departmentIds:\""+(s.getDepartmentIds()==null?"":s.getDepartmentIds())+"\"");
			sb.append(tmp);
			sb.append("}");
			if(i < size -1) {
				sb.append(",");
			}
		}
		return sb.toString();
	}

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4、在jsp页面中，解析json字符串

a)上面封装的json数据格式：{"265":{projectId:"0",subProjectId:"126",stageNameId:"1",psName:"2",planFromDate:"",planToDate:"",stageLogId:"100"},"270":{projectId:"0",subProjectId:"126",stageNameId:"1",psName:"",planFromDate:"",planToDate:"",stageLogId:"100"},"268":{projectId:"0",subProjectId:"126",stageNameId:"1",psName:"",planFromDate:"",planToDate:"",stageLogId:"100"}}

?? b)js中使用

var json = {<s:property value="#request.jsonStr" escape="false"/>};
	//alert('<s:property value="#request.jsonStr" escape="false"/>');
	function initTbody(){
		var str = '';
		for(var k in json){
			var v = json[k];
			
			var tr = '<tbody stageLogId="' + v.stageLogId
				+ '" projectId="' + v.projectId
				+ '" subProjectId="' + v.subProjectId
				+ '">';
			
			var stages = v.stages, idx = 0;
			for(var m in stages){
				tr += '<tr planFromDate="' + stages[m].planFromDate + '" planToDate="' + stages[m].planToDate + '" stageNameId="' + stages[m].stageNameId + '" psName="' + stages[m].psName + '" stageId="' + m + '" class="datarow" ondblclick="editStage(this)">';
				
	}

5、jsp页面通过**.action?jsonParam="这里是json格式的数据"传入到逻辑层处理

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/**
	 * 解析json数据
	 * @param str//格式：{"265":{projectId:"0",subProjectId:"126",stageNameId:"1",psName:"2",planFromDate:"",planToDate:"",stageLogId:"100"},"270":{projectId:"0",subProjectId:"126",stageNameId:"1",psName:"",planFromDate:"",planToDate:"",stageLogId:"100"},"268":{projectId:"0",subProjectId:"126",stageNameId:"1",psName:"",planFromDate:"",planToDate:"",stageLogId:"100"}}
	 * @return
	 * 2012-5-2 下午10:14:24
	 */
	private List<Stage> parseStageJson(String str) {
		
		List<Stage> stageList = new ArrayList<Stage>();
		if(StringUtils.isEmpty(str)) return stageList;
		JSONObject array = JSONObject.fromObject(str);
		Iterator<String> keys = array.keys();
		while(keys.hasNext()) {
			String key = keys.next();
			System.out.println(key);
			JSONObject value = array.getJSONObje