java如何解析json对象
时间: 2024-03-09 22:44:28 浏览: 29
在Java中解析JSON对象可以使用Java自带的org.json库或者第三方库如Jackson、Gson等。
使用org.json库解析JSON对象的示例代码:
```java
import org.json.*;
String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
JSONObject jsonObject = new JSONObject(jsonString);
String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");
String city = jsonObject.getString("city");
```
使用Jackson库解析JSON对象的示例代码:
```java
import com.fasterxml.jackson.databind.ObjectMapper;
String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
ObjectMapper objectMapper = new ObjectMapper();
Map<String, Object> jsonMap = objectMapper.readValue(jsonString, new TypeReference<Map<String, Object>>(){});
String name = (String) jsonMap.get("name");
int age = (int) jsonMap.get("age");
String city = (String) jsonMap.get("city");
```
使用Gson库解析JSON对象的示例代码:
```java
import com.google.gson.*;
String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";
Gson gson = new Gson();
Map<String, Object> jsonMap = gson.fromJson(jsonString, new TypeToken<Map<String, Object>>(){}.getType());
String name = (String) jsonMap.get("name");
int age = (int) jsonMap.get("age");
String city = (String) jsonMap.get("city");
```