54 lines
1.4 KiB
Plaintext
54 lines
1.4 KiB
Plaintext
package com.cmeim.biz.utils;
|
|
|
|
import com.fasterxml.jackson.core.JsonProcessingException;
|
|
import com.fasterxml.jackson.databind.JavaType;
|
|
import com.fasterxml.jackson.databind.ObjectMapper;
|
|
|
|
import java.util.List;
|
|
|
|
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。
|
|
*/
|
|
public static String objectToJson(Object data) {
|
|
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
|
|
*/
|
|
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
|
|
*/
|
|
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;
|
|
}
|
|
}
|