1 package com.xxx.common.util;
2
3 import java.util.List;
4 import com.fasterxml.jackson.core.JsonProcessingException;
5 import com.fasterxml.jackson.databind.JavaType;
6 import com.fasterxml.jackson.databind.ObjectMapper;
7
8 public class JSONUtil {
9
10 // 定义jackson对象
11 private static final ObjectMapper mapper = new ObjectMapper();
12 /**
13 * 将对象转换成json字符串
14 * @param data
15 * @return
16 */
17 public static String toJSONString(Object data) {
18 try {
19 String string = mapper.writeValueAsString(data);
20 return string;
21 } catch (JsonProcessingException e) {
22 e.printStackTrace();
23 }
24 return null;
25 }
26
27 /**
28 * 将json结果集转化为对象
29 * @param jsonData
30 * @param beanType
31 * @return
32 */
33 public static <T> T parseObject(String jsonData, Class<T> beanType) {
34 try {
35 T t = mapper.readValue(jsonData, beanType);
36 return t;
37 } catch (Exception e) {
38 e.printStackTrace();
39 }
40 return null;
41 }
42
43 /**
44 * 将json数据转换成list
45 * @param jsonData
46 * @param beanType
47 * @return
48 */
49 public static <T> List<T> parseArray(String jsonData, Class<T> beanType) {
50 JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, beanType);
51 try {
52 List<T> list = mapper.readValue(jsonData, javaType);
53 return list;
54 } catch (Exception e) {
55 e.printStackTrace();
56 }
57 return null;
58 }
59 }
