使用 Json-lib
一、相关资料
1、json-lib 参考网站：http://json-lib.sourceforge.net/
2、下载：http://sourceforge.net/projects/json-lib/files/json-lib/
3、json-lib 的版本。
依据对jdk 的匹配，Json-lib有两个版本：
1） x-jdk13匹配于JDK 1.3.1及更高版本。
2）x-jdk15匹配于JDK 1.5，包括在JSONArray 和JSONObject中对Enums 的支持。
4、json-lib的依赖包（基于 json-lib-2.3-jdk15.jar ）。
1）commons-lang-2.6.jar
2）commons-beanutils-1.8.3.jar
3）commons-collections-3.2.1.jar
4）commons-logging-1.1.1.jar
5）ezmorph-1.0.6.jar
二、例：使用json-lib 处理数据，类似为DataGrid 数据。
JSONObject jsonObject = new JSONObject();
jsonObject.put("page", 1); // 当前页
jsonObject.put("total", 3); // 总页数
jsonObject.put("records", 3); // 总记录数
UserDaoImpl userDaoImpl=new UserDaoImpl();
ArrayList<User> userList=userDaoImpl.getUserList();
JSONArray rows=JSONArray.fromObject(userList); // 用JSONArray 存储 JSONArray.fromObject() 转换的数据
jsonObject.put("rows", rows);
System.out.println("要返回的json对象：\n" + jsonObject.toString());
三、打印结果。
1） System.out.println(rows);
[{"address":"合肥","email":"[email protected]","password":"123456","sex":"男","telephone":"5394252","userId":1,"userName":"admin"},{"address":"上海","email":"[email protected]","password":"123456","sex":"男","telephone":"1394253","userId":2,"userName":"zhangsan"},{"address":"北京","email":"[email protected]","password":"123456","sex":"女","telephone":"5625321","userId":3,"userName":"lisi"}]
2）System.out.println("要返回的json对象：\n" + jsonObject.toString());
{"page":1,"total":3,"records":3,
"rows":
[{"address":"合肥","email":"[email protected]","password":"123456","sex":"男","telephone":"5394252","userId":1,"userName":"admin"},{"address":"上海","email":"[email protected]","password":"123456","sex":"男","telephone":"1394253","userId":2,"userName":"zhangsan"},{"address":"北京","email":"[email protected]","password":"123456","sex":"女","telephone":"5625321","userId":3,"userName":"lisi"}]
}