对象转Json字符串时，忽略指定属性

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"}