java学习笔记：json串解析

1、所需jar包

需要导入json的jar包和json所依赖的jar包至builtPath路径下

json-lib-2.4-jdk15.jar

commons-beanutils-1.8.0.jar

commons-collections-3.2.1-1.0.0.jar

commons-lang-2.5.jar

commons-logging-1.1.1.jar  

ezmorph-1.0.6.jar

2、import

import net.sf.json.JSONArray;

import net.sf.json.JSONException;

import net.sf.json.JSONObject;

3、使用JsonObject解析只有一条数据的json

public static void main(String[] args) {

         String jsonString="{\"name\":\"zhangsan\",\"password\":

\"zhangsan123\",\"email\":\"[email protected]\"}";

         JSONObject json =JSONObject.fromObject(jsonString);

         User user = new User();

         user.setName(json.getString("name"));

         user.setPassword(json.getString("password"));

         user.setEmail(json.getString("email"));

    }

备注，在json.cn中打开jsonString如下：

{

    "name":"zhangsan",

    "password":"zhangsan123",

    "email":"[email protected]"

    }

4、使用JsonArray解析数组数据的json

String json = "{\"personData\":[

{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"[email protected]\"},

{\"name\":\"lisi\",\"password\":\"lisi123\",\"email\":\"[email protected]\"}]

}";

JSONArray jsonArray = JSONArray.fromObject(json);

for(int i = 0; i < jsonArray.size(); i++) {

User user = new User();

user.setName(jsonArray.getJSONObject(i).getString("name"));

user.setpassword(jsonArray.getJSONObject(i).getString("password"));

user.setEmail(jsonArray.getJSONObject(i).getString("email"));

users.add(user);

}

备注，在json.cn中打开jsonString如下：

{

    "personData":[

        {

            "name":"zhangsan",

            "password":"zhangsan123",

            "email":[email protected]

        },

        {

            "name":"lisi",

            "password":"lisi123",

            "email":[email protected]

        }

    ]

}