施用 Json-lib

一、相关资料

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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

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二、例：使用json-lib 处理数据，类似为DataGrid 数据。

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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());

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?三、打印结果。

1） System.out.println(rows);

[{"address":"合肥","email":"admin@163.com","password":"123456","sex":"男","telephone":"5394252","userId":1,"userName":"admin"},{"address":"上海","email":"zhangsan@163.com","password":"123456","sex":"男","telephone":"1394253","userId":2,"userName":"zhangsan"},{"address":"北京","email":"lisi@sohu.com","password":"123456","sex":"女","telephone":"5625321","userId":3,"userName":"lisi"}]

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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":"admin@163.com","password":"123456","sex":"男","telephone":"5394252","userId":1,"userName":"admin"},{"address":"上海","email":"zhangsan@163.com","password":"123456","sex":"男","telephone":"1394253","userId":2,"userName":"zhangsan"},{"address":"北京","email":"lisi@sohu.com","password":"123456","sex":"女","telephone":"5625321","userId":3,"userName":"lisi"}]

}

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