lombook注意点1

1. pId格式的值传递成pid问题.

问题描述

一个实体类存有pId,即第一个字母小写,第二个字母大写的情况.

public class Department {
    private Long id;
    private Long pId;
    private String name;
}

如果走idea自动生成的get/set方法,为区分其驼峰,get/set后面跟的第一个字母不会大写,这样输出给前端的值将是正常的驼峰格式.

public class Department {
    private Long id;
    private Long pId;
    private String name;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }
   // 这里的get方法时将p小写.没有遵循驼峰格式
    public Long getpId() {
        return pId;
    }

    public void setpId(Long pId) {
        this.pId = pId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

但通过lombook的@data标签修饰的类生成的class源文件中的类如下.其pId的get/set方法严格按照驼峰格式.

public class Department {
    private Long id;
    private Long pId;
    private String name;

    public Department() {
    }

    public Long getId() {
        return this.id;
    }

    public Long getPId() {
        return this.pId;
    }

    public String getName() {
        return this.name;
    }

    public void setId(final Long id) {
        this.id = id;
    }

    public void setPId(final Long pId) {
        this.pId = pId;
    }

    public void setName(final String name) {
        this.name = name;
    }

    public boolean equals(final Object o) {
        if (o == this) {
            return true;
        } else if (!(o instanceof Department)) {
            return false;
        } else {
            Department other = (Department)o;
            if (!other.canEqual(this)) {
                return false;
            } else {
                label47: {
                    Object this$id = this.getId();
                    Object other$id = other.getId();
                    if (this$id == null) {
                        if (other$id == null) {
                            break label47;
                        }
                    } else if (this$id.equals(other$id)) {
                        break label47;
                    }

                    return false;
                }

                Object this$pId = this.getPId();
                Object other$pId = other.getPId();
                if (this$pId == null) {
                    if (other$pId != null) {
                        return false;
                    }
                } else if (!this$pId.equals(other$pId)) {
                    return false;
                }

                Object this$name = this.getName();
                Object other$name = other.getName();
                if (this$name == null) {
                    if (other$name != null) {
                        return false;
                    }
                } else if (!this$name.equals(other$name)) {
                    return false;
                }

                return true;
            }
        }
    }

    protected boolean canEqual(final Object other) {
        return other instanceof Department;
    }

    public int hashCode() {
        int PRIME = true;
        int result = 1;
        Object $id = this.getId();
        int result = result * 59 + ($id == null ? 43 : $id.hashCode());
        Object $pId = this.getPId();
        result = result * 59 + ($pId == null ? 43 : $pId.hashCode());
        Object $name = this.getName();
        result = result * 59 + ($name == null ? 43 : $name.hashCode());
        return result;
    }

    public String toString() {
        return "Department(id=" + this.getId() + ", pId=" + this.getPId() + ", name=" + this.getName() + ")";
    }
}

这样在序列化的时候通过get方法转参数时,会将P与I都转成小写.从而输出给前端的时pid这样的.

解决方法

1. 重写get/set方法.破坏驼峰格式. 如pId的get方法直接写成getpId().

2. 修改序列化方法,不从get方法中反推需要序列化的参数

   @Configuration
   public class WebConfigurer implements WebMvcConfigurer {
   
       @Override
       public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
           val converter = new FastJsonHttpMessageConverter();
           converter.setSupportedMediaTypes(
                   Lists.newArrayList(MediaType.APPLICATION_JSON, MediaType.APPLICATION_JSON_UTF8));
           converter.getFastJsonConfig().setSerializerFeatures(SerializerFeature.DisableCircularReferenceDetect,
                   SerializerFeature.WriteMapNullValue);
           converters.add(0, converter);
   
           val builder = Jackson2ObjectMapperBuilder.xml();
           builder.indentOutput(true);
           converters.add(new MappingJackson2XmlHttpMessageConverter(builder.build()));
       }
   }