1. 内容
1 public class PfJacksonUtils {
2 private PfJacksonUtils() {
3
4 }
5
6 public static String beanToJson(Object obj) throws JsonProcessingException {
7 ObjectMapper objectMapper = new ObjectMapper();
8 return objectMapper.writeValueAsString(obj);
9 }
10
11 public static <T> T jsonToBean(String json, Class<T> cls)
12 throws JsonParseException, JsonMappingException, IOException {
13 ObjectMapper objectMapper = new ObjectMapper();
14 if (json == null) {
15 return objectMapper.readValue("{}", cls);
16 }
17 return objectMapper.readValue(json, cls);
18 }
19
20 public static String mapToJson(Map<String, String> map) throws JsonProcessingException {
21 ObjectMapper mapper = new ObjectMapper();
22 return mapper.writeValueAsString(map);
23 }
24
25 public static <T> T jsonToBeanByMatchAttribute(String json, Class<T> cls)
26 throws JsonParseException, JsonMappingException, IOException {
27 if (StringUtils.isEmpty(json)) {
28 return null;
29 }
30 ObjectMapper objectMapper = new ObjectMapper();
31 objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
32 return objectMapper.readValue(json, cls);
33 }
34 }
2. 用法
1 String json = PfJacksonUtils.beanToJson(object);
2 PmDataInfo pmDataInfo = PfJacksonUtils.jsonToBeanByMatchAttribute(json, PmDataInfo.class);
