JSON(三:json格式数据解析)
格式一
说明：
后台通过StringBuffer拼接数据。
前台端通过struts2配置页面跳转，通过s:property标签获取对应的值(通过setter和getter方法设置对应的变量)。

{'key':[{'key1':'value1'},{'key2':'value2'},......]}

StringBuffer sbf = new StringBuffer();sbf.append("{'data' : ");try{if (null == tVisitResult) {sbf.append("'no_result'");} else {int storeId = null == tVisitResult.getStoreId() ? 0 : tVisitResult.getStoreId();TStore store = this.visitResultService.getById(TStore.class, storeId);sbf.append("[");// storesbf.append("{'name' : '");sbf.append(store.getName());sbf.append("', 'lon' : '");sbf.append(store.getGisX());sbf.append("', 'lat' : '");sbf.append(store.getGisY());sbf.append("'}, ");// check in gissbf.append("{'name' : 'CheckIn', 'lon' : '116.45733', 'lat' : '39.91993'}, ");// check out gissbf.append("{'name' : 'CheckOut', 'lon' : '116.46233', 'lat' : '39.95293'} ");//sbf.append("]");}sbf.append("}");} catch (Exception e) {e.printStackTrace();}

{'data' : [{'name' : '鲁春利测试店面A', 'lon' : '116.45724121462', 'lat' : '39.919978035546'},{'name' : 'CheckIn', 'lon' : '116.45733', 'lat' : '39.91993'}, {'name' : 'CheckOut', 'lon' : '116.46233', 'lat' : '39.95293'}]}

var data = "<s:property value='jsonData'/>";var content = eval("("+data+")");if ('no_store' == $.trim(result)) { return false;}for (var i in result) {if (typeof(result[i]) == "object") {  if ("" == $.trim(result[i].lon)) {  continue;}alert("name : " + result[i].name + "\tlon : " + result[i].lon + "\tlat : " + result[i].lat);}}

说明：
如果将

{'name' : 'CheckOut', 'lon' : '116.46233', 'lat' : '39.95293'}

格式的单引号改成双引号

{\"name\" : \"CheckOut\", \"lon\" : \"116.46233\", \"lat\" : \"39.95293\"}

的话，则解析的过程应为

var data = '<s:property value="jsonData" escape="false"/>'

格式二

JSONObject jsonObject = new JSONObject();StringBuffer json = new StringBuffer();for (VisitPlanInfo planInfo : this.visitPlanInfoList) {//查找已经放过的店面FilterWrapper cancelFilter = new FilterWrapper();cancelFilter.addFilter("companyId", userInfo.getCompanyId(), Filter.EQ);cancelFilter.addFilter("planId", planInfo.gettVisitPlan().getPlanId());cancelFilter.addFilter("visitNo", planInfo.getVisitNo());cancelFilter.addFilter("visitStatus", VISIT_PLAN_CANCEL, Filter.EQ);cancelFilter.addFilter("isDelete", IS_DELETE_NO, Filter.EQ);List<TVisitResult> results = this.visitResultService.getEntitiesByFilter(TVisitResult.class, cancelFilter);//json.append("'pno_");json.append(planInfo.gettVisitPlan().getPlanId());json.append("_");json.append(planInfo.getVisitNo());json.append("' : ");if (null == results || results.size() <= 0) {//全部访问完成json.append("'no'");} else {//有取消的拜访任务json.append("'");for (TVisitResult tr : results) {json.append(tr.getStoreName());json.append(";  ");}json.append("'");}json.append(", ");}log.info("json : " + json);if (json.length() > 0) {if (json.lastIndexOf(",") > 0) {json = json.deleteCharAt(json.lastIndexOf(","));}jsonObject.put("data", "{" + json.toString() + "}");} else {jsonObject.put("data", "none");}this.setJsonStores(jsonObject.toString());

{"data":{"pno_1568_1" : "鲁春利测试店面A;","pno_1560_1" : "鲁春利测试店面A;鲁春利测试店面B;","pno_1420_10" : "鲁春利测试店面B;鲁春利测试店面C;","pno_1565_1" : "鲁春利测试店面A"}} 

var data = <s:property value="jsonStores"/>;//不需要在s:property 标签外添加单引号或双引号

说明：
这里不再需要通过eval("(" + + ")")来解析。如果传入某一个id值为pno_1565_1(id = pno_1565_1)，则data.data[id]的值为"鲁春利测试店面A"。

格式三
过Ajax方式获取，返回类型为：setContentType("text/json;charset=UTF-8");

List<TUser> users = ......String json = JSONArray.fromCollection(users).toString();out.print(json);

$.post(url, null, function(data){var content = eval("(" + data + ")");for (i in content) {alert(content[i].name + "\t" + content[i].phoneNo);}}

web端获取到的数据：[{"userId":10056,"name":"grady","status":"1","password":"grms123","phoneNo":"12345678901","isDelete":"0","companyId":9},{"userId":10160,"name":"wangxiaojie","status":"1","password":"grms123","phoneNo":"18910858581","isDelete":"0","companyId":9}] 

格式四

var json = "{'results' : [{'id' : 12,'name' : '京汉旭城家园商圈', 'shortname' : '京汉旭城...', 'boundary' : '', 'centerPoint' : '京汉旭城家园', 'lon' : '116.22391', 'lat' : '39.88617', 'shape' : '0.0', 'diameter' : '3000'},{'id' : 13,'name' : '门头沟军庄中心东三小学商圈', 'shortname' : '门头沟军...', 'boundary' : '[{\"bname\":\"门头沟军庄中心东三小学\",\"lon\":\"116.13296\",\"lat\":\"40.02321\"},{\"bname\":\"东山贡梨园生态山庄\",\"lon\":\"116.151\",\"lat\":\"39.99931\"},{\"bname\":\"京香花园东区西门\",\"lon\":\"116.21614\",\"lat\":\"39.97753\"}]', 'centerPoint' : 'null', 'lon' : 'null', 'lat' : 'null', 'shape' : '0.0', 'diameter' : '0'}]}";

var obj = eval("(" + json + ")");var data = obj.results;for (var i in data) {if (typeof(data[i]) == "object") {if(null == data[i].boundary || "" == $.trim(data[i].boundary)) {                      //......        } else {//var bound = data[i].boundary;/*var k = 0;str = '';while(bound.indexOf("\"") != -1)  { k = bound.indexOf("\""); bound = bound.replace("\"", "'"); str += bound.substr(0, k + 1); bound = bound.substr(k + 1);}str += bound;   */var str = bound.replace(/\"/g, "'");  //注意正则/\"/g的形式var jsonNew = eval("(" + str + ")");//str为另外的JSON对象//以上代码类似于replaceAll        }       }}