Jackson：我怎么能忽略getter而只解析setter呢？[副本]

Question

public class TestJson {
    private String s1, s2;

    @JsonIgnore
    public String getS1() {
        return s1;
    }

    @JsonIgnore(false)
    public void setS1(String s1) {
        this.s1 = s1;
    }

    public String getS2() {
        return s2;
    }

    public void setS2(String s2) {
        this.s2 = s2;
    }

    public static void main(String[] args) throws Exception {
        ObjectMapper mapper = new ObjectMapper();
        TestJson bean = new TestJson();
        bean.setS1("test1");
        bean.setS2("test2");
        System.out.println(mapper.writeValueAsString(bean));

        String json = "{\"s1\":\"test1\",\"s2\":\"test2\"}";
        bean = mapper.readValue(json, TestJson.class);
        System.out.println("s1=" + bean.getS1());
        System.out.println("s2=" + bean.getS2());
    }
}

s1=test1
s2=test2

s1=null
s2=test2

Answer 1

您可以将@jsonproperty与jsonproperty.access.write_only一起使用

来自文档

访问设置，该设置意味着可能只为反序列化写入（设置）属性，而不会在序列化上读取（获取）属性，即序列化中不包括属性的值。

public class TestJson {

    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
    private String s1;
    private String s2;


    public String getS1() {
        return s1;
    }

    public void setS1(String s1) {
        this.s1 = s1;
    }

    public String getS2() {
        return s2;
    }

    public void setS2(String s2) {
        this.s2 = s2;
    }
}

public class TestJson {
    private String s1;
    private String s2;


    @JsonIgnore
    public String getS1() {
        return s1;
    }

    @JsonProperty
    public void setS1(String s1) {
        this.s1 = s1;
    }

    public String getS2() {
        return s2;
    }

    public void setS2(String s2) {
        this.s2 = s2;
    }
}