java返回前端实体类json数据时怎样忽略某个属性

第一种方法

  SpringBoot中忽略实体类中的某个属性不返回给前端的方法：使用Jackson的方式：//第一种方式，使用@JsonIgnore注解标注在属性上，

1. //第一种方式，使用@JsonIgnore注解标注在属性上，忽略指定属性
2. public  class PropertyDTO {
3.    
4.     private Integer disable;
5.    
6.     private String placeholder;
7.     //使用@JsonIgnore注解，忽略此属性，前端不会拿到该属性
8.     @JsonIgnore
9.     private String validate;
10. }

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第二种方法

  使用@JsonIgnoreProperties标注在类上，可以忽略指定聚集的属性

1. //第二种方式，使用@JsonIgnoreProperties标注在类上，可以忽略指定集合的属性
2. @JsonIgnoreProperties({"validate"})
3. public  class PropertyDTO {
4.     private Integer disable;
5.     private String placeholder;
6.     private String validate;
7. }

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注意：同时使用@JsonProperty和@JsonIgnore时，大概会导致@JsonIgnore失效
  第三种方法

  使用fastjson时：使用@JSONField(serialize = false)注解

1. public  class PropertyDTO {
2.    
3.     private Integer disable;
4.     private String placeholder;
5.     @JSONField(serialize = false)
6.     private String validate;
7. }

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第四种方法

  加上 @JsonProperty(access = JsonProperty.Access.WRITE_ONLY) ：前端就不能吸收到

1. /**
2.      * 密码
3.      */
4.     @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)
5.     private String password;

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第五种方法

  假如是null不返回，注解JsonInclude(value= JsonInclude.Include.NON_NULL) 返回的字段属性为null 就不会展示给前端...可以放在类上，也可以放在字段上!

1. @JsonInclude(value= JsonInclude.Include.NON_NULL)
2. public  class PropertyDTO {
3.    
4.     private Integer disable;
5.     private String placeholder;
6.     private String validate;
7. }

复制代码

来源：https://blog.csdn.net/zlfjavahome/article/details/129619541
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