fasterxml Jackson 各种使用场景以及序列化、反序列化的时候忽略不必要的Properties

1. 将json字符串转成Map:

public static Map jsonToMap(String json) {
    ObjectMapper objectMapper = new ObjectMapper();
    try {
        return objectMapper.readValue(json, Map.class);
    } catch (IOException e) {
        LogUtil.outPutLog(Constant.LOG_ERROR, JsonUtils.class.getSimpleName(), e);
    }
    return null;
}

2. 将json字符串转换成java对象:
public static <T> T jsonToObject(String json, Class<T> clazz) {
    ObjectMapper objectMapper = new ObjectMapper();
    try {
        return (T) objectMapper.readValue(json, clazz);
    } catch (Exception e) {
        LogUtil.outPutLog(Constant.LOG_ERROR, JsonUtils.class.getSimpleName(), e);
    }
    return null;
}

3. 将Java对象转换成Josn:

public static String objectToJsonString(Object obj) {
    ObjectMapper objectMapper = new ObjectMapper();
    try {
        return objectMapper.writeValueAsString(obj);
    } catch (Exception e) {
        LogUtil.outPutLog(Constant.LOG_ERROR, JsonUtils.class.getSimpleName(), e);
    }
    return null;
}

4. 序列化、反序列化时忽略不必要的属性:

序列化时可以在成员变量上面加入@JsonIgnore注解:

    @JsonInclude(content = Include.NON_NULL, value = Include.NON_NULL)
    private String test;

    @JsonInclude(content = Include.NON_EMPTY, value = Include.NON_EMPTY)
    private List<Available> vehicle = new ArrayList<Available>();

反序列化时可以直接在类上面加入@JsonIgnoreProperties,忽略所有未知属性,也可以单个去忽略

@JsonIgnoreProperties(ignoreUnknown = true)
public class TestObject {...}
原文地址:https://www.cnblogs.com/cnsec/p/13407167.html