[Spring]~@JsonProperty(字段映射名称)

作用

@JsonProperty 可以指定某个属性和json映射的名称。例如我们有个json字符串为{“user_name”:”aaa”},而java中命名要遵循驼峰规则,则为userName,这时通过@JsonProperty 注解来指定两者的映射规则即可。

实体类

@JsonIgnoreType
public class JsonTestModel {
    String name;
    @JsonProperty("ti_me")
    Date time;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Date getTime() {
        return time;
    }
    public void setTime(Date time) {
        this.time = time;
    }
}

测试类

public class JsonTests {

    static JsonTestModel testModel;

    @BeforeClass
    public static void setTestModel(){
        JsonTestModel jsonTestModel = new JsonTestModel();
        jsonTestModel.setName("@JsonIgnoreProperties测试");
        jsonTestModel.setTime(new Date());
        testModel = jsonTestModel;
    }

    @Test
    public void test() throws IOException {

        ObjectMapper mapper = new ObjectMapper();
        //序列化
        String json = mapper.writeValueAsString(testModel);
        System.out.println(json);
        json = "{\"name\":\"@JsonIgnoreProperties测试\",\"ti_me\":1575431118191}";
        //反序列化
        JsonTestModel readValue = mapper.readValue(json, JsonTestModel.class);
        System.out.println("name:"+readValue.getName());
        System.out.println("time:"+readValue.getTime());

    }

    @AfterClass
    public static void tearDown() {
        testModel = null;
    }

}

测试结果

{"name":"@JsonIgnoreProperties测试","ti_me":1575445225021}
name:@JsonIgnoreProperties测试
time:Wed Dec 04 11:45:18 CST 2019

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