对象转Json字符串时，忽略指定属性

深藏阁楼爱情的钟 2022-06-04 09:14 846阅读 0赞

# 1、FastJson转Json字符串时，忽略指定属性 #

## 1.1使用注解@JSONField ##

以下Bean

package com.gomefinance.esign;
    
    import com.alibaba.fastjson.annotation.JSONField;
    import lombok.Getter;
    import lombok.Setter;
    
    import java.io.Serializable;
    
    /**
     * 本地签署信息
     * Created by JHAO on 2017/5/31.
     */
    @Setter
    @Getter
    public class FastJsonInputBean implements Serializable {
    
        // 合同模板ID
    
        private String contractTemplateId;
        // 合同号
        private String contractId;
        // Base64编码的合同
        @JSONField(serialize = false)
        private String contractImage;
        private String contractVersion;
    
    }

FastJsonInputBean inputBean = new FastJsonInputBean();
     inputBean.setContractImage("contractImage");
     inputBean.setContractTemplateId("templateId");
     inputBean.setContractId("comtractId");
     inputBean.setContractVersion("contractVersion");
    
     System.out.println("JSONField(serialize = false)忽略contractImage属性:"+JSON.toJSONString(inputBean));

打印结果：{"contractId":"comtractId","contractTemplateId":"templateId","contractVersion":"contractVersion"}

## 1.2Filter指定序列化的字段 ##

SimplePropertyPreFilter filter = new SimplePropertyPreFilter(FastJsonInputBean.class, "contractTemplateId");
     System.out.println("filter忽略contractTemplateId属性:"+JSONObject.toJSONString(inputBean, filter));

打印结果：{"contractTemplateId":"templateId"}

#  #

# 2、JackSon忽略字段 #

# @JsonIgnoreProperties主键或者在字段上使用@JsonIgnore #

package com.gomefinance.esign;
    
    import com.alibaba.fastjson.annotation.JSONField;
    import com.fasterxml.jackson.annotation.JsonIgnore;
    import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
    import lombok.Getter;
    import lombok.Setter;
    
    import java.io.Serializable;
    
    /**
     * 本地签署信息
     * Created by JHAO on 2017/5/31.
     */
    @Setter
    @Getter
    @JsonIgnoreProperties({"contractTemplateId", "contractImage"})
    public class JackSonInputBean implements Serializable {
    
        // 合同模板ID
    
        private String contractTemplateId;
        // 合同号
        @JsonIgnore
        private String contractId;
        // Base64编码的合同
        private String contractImage;
        private String contractVersion;
    
    }

JackSonInputBean jackSonInputBean = new JackSonInputBean();
     jackSonInputBean.setContractImage("contractImage");
     jackSonInputBean.setContractTemplateId("templateId");
     jackSonInputBean.setContractId("comtractId");
     jackSonInputBean.setContractVersion("contractVersion");
    
     ObjectMapper objectMapper = new ObjectMapper();
     System.out.println("JackSon JsonIgnore忽略contractId属性:"+objectMapper.writeValueAsString(jackSonInputBean));

打印结果：{"contractVersion":"contractVersion"}