public class JsonUtils { |
// 定义jackson对象 |
private static final ObjectMapper MAPPER = new ObjectMapper(); |
/** |
* 将对象转换成json字符串。 |
* <p>Title: pojoToJson</p> |
* <p>Description: </p> |
* @param data |
* @return |
* @throws IOException |
*/ |
public static String objectToJson(Object data) throws IOException { |
try { |
String string = MAPPER.writeValueAsString(data); |
return string; |
} catch (JsonProcessingException e) { |
e.printStackTrace(); |
} |
return null ; |
} |
|
/** |
* 将json结果集转化为对象 |
* |
* @param jsonData json数据 |
* @param clazz 对象中的object类型 |
* @return |
*/ |
public static <T> T jsonToPojo(String jsonData, Class<T> beanType) { |
try { |
T t = MAPPER.readValue(jsonData, beanType); |
return t; |
} catch (Exception e) { |
e.printStackTrace(); |
} |
return null ; |
} |
|
/** |
* 将json数据转换成pojo对象list |
* <p>Title: jsonToList</p> |
* <p>Description: </p> |
* @param jsonData |
* @param beanType |
* @return |
*/ |
public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) { |
JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List. class , beanType); |
try { |
List<T> list = MAPPER.readValue(jsonData, javaType); |
return list; |
} catch (Exception e) { |
e.printStackTrace(); |
} |
|
return null ; |
} |
|
/** |
* 将json数据转换成pojo对象listmap |
* <p>Title: jsonToList</p> |
* <p>Description: </p> |
* @param jsonData |
* @param beanType |
* @return |
*/ |
public static <T>List<Map<Serializable, Serializable>> jsonToListMap(String jsonData, Class<T> beanType) { |
JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List. class , beanType); |
try { |
List<Map<Serializable, Serializable>> list = MAPPER.readValue(jsonData, javaType); |
return list; |
} catch (Exception e) { |
e.printStackTrace(); |
} |
|
return null ; |
} |
} |