使用 json_in_java

java_in_json

Table of Contents

• 1. Java 使用 Json
  • 1.1. 下载地址:
  • 1.2. 构造 json 字符串
  • 1.3. 解析 json 字符串
  • 1.4. 进一步使用,查看文档.

1 Java 使用 Json

 

1.1 下载地址: http://mvnrepository.com/artifact/org.json/json

1.2 构造 json 字符串

JSONObject jsonObject = new JSONObject();
jsonObject.put("name", "zhangsan");
jsonObject.put("age", 11);

JSONArray array = new JSONArray();
array.put(0,"lisi");
array.put(1,"wangwu");
array.put(2,"zhaoliu");
jsonObject.put("friends", array);

System.out.println(jsonObject.toString());

结果: {"friends":["lisi","wangwu","zhaoliu"],"age":11,"name":"zhangsan"}

1.3 解析 json 字符串

String str = "{\"friends\":[\"lisi\",\"wangwu\",\"zhaoliu\"],\"age\":11,\"name\":\"zhangsan\"}";
JSONTokener tokener = new JSONTokener(str);
JSONObject object = (JSONObject) tokener.nextValue();

System.out.println(object.getString("name"));
System.out.println(object.getInt("age"));

JSONArray arr = object.getJSONArray("friends");
for (int i = 0; i < arr.length(); i++) {
        String friendName = (String) arr.get(i);
        System.out.println(friendName);
}

结果: zhangsan 11 lisi wangwu zhaoliu

1.4 进一步使用,查看文档.

Author: dai

Created: 2016-04-12 Tue 17:03

Emacs 24.5.1 (Org mode 8.2.10)

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