JSONObject object = JSONObject.fromObject(data);
新版的是用 JSONObject object = new JSONObject(data);
JSONObject只是一种数据结构,可以理解为JSON格式的数据结构(key-value 结构),可以使用put方法给json对象添加元素。JSONObject可以很方便的转换成字符串,也可以很方便的把其他对象转换成JSONObject对象。
pom:
<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.28</version> </dependency>
1.通过原生生成json数据格式。
JSONObject zhangsan = new JSONObject(); try { //添加 zhangsan.put("name", "张三"); zhangsan.put("age", 18.4); zhangsan.put("birthday", "1900-20-03"); zhangsan.put("majar", new String[] {"哈哈","嘿嘿"}); zhangsan.put("null", null); zhangsan.put("house", false); System.out.println(zhangsan.toString()); } catch (JSONException e) { e.printStackTrace(); }
2.通过hashMap数据结构生成
HashMap<String, Object> zhangsan = new HashMap<>(); zhangsan.put("name", "张三"); zhangsan.put("age", 18.4); zhangsan.put("birthday", "1900-20-03"); zhangsan.put("majar", new String[] {"哈哈","嘿嘿"}); zhangsan.put("null", null); zhangsan.put("house", false); System.out.println(new JSONObject(zhangsan).toString());
3.通过实体生成
Student student = new Student(); student.setId(1); student.setAge("20"); student.setName("张三"); //生成json格式 System.out.println(JSON.toJSON(student)); //对象转成string String stuString = JSONObject.toJSONString(student);
4.JSON字符串转换成JSON对象
String studentString = "{\"id\":1,\"age\":2,\"name\":\"zhang\"}"; //JSON字符串转换成JSON对象 JSONObject jsonObject1 = JSONObject.parseObject(stuString); System.out.println(jsonObject1);
5.list对象转listJson
ArrayList<Student> studentLsit = new ArrayList<>(); Student student1 = new Student(); student1.setId(1); student1.setAge("20"); student1.setName("asdasdasd"); studentLsit.add(student1); Student student2 = new Student(); student2.setId(2); student2.setAge("20"); student2.setName("aaaa:;aaa"); studentLsit.add(student2); //list转json字符串 String string = JSON.toJSON(studentLsit).toString(); System.out.println(string); //json字符串转listJson格式 JSONArray jsonArray = JSONObject.parseArray(string); System.out.println(jsonArray);
阿里的json很好用,还有一个谷歌Gson也不错。有兴趣的可以看一看
JSONObject object = JSONObject.fromObject(data);
新版的是用 JSONObject object = new JSONObject(data);转载于:https://www.cnblogs.com/kinome/p/10289304.html
JSONObject jo= (JSONObject) JSONObject.toJSON(javaBean);
Student stu = JSONObject.parseObject(jo, Student.class);
JSONObject jo = JSON.parseObject(str);
JSONObject jsonObject = JSONObject.fromObject(result);报错
引用import net.sf.json.JSONObject;
<!-- JSONObject对象依赖的jar包 --> <dependency> <groupId>commons-beanutils</groupId> <artifactId>commons-beanutils</artifactId> <version>1.9.3</version> </dependency> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>3.2.1</version> </dependency> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>net.sf.ezmorph</groupId> <artifactId>ezmorph</artifactId> <version>1.0.6</version> </dependency> <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.2.3</version> <classifier>jdk15</classifier><!-- 指定jdk版本 --> </dependency>