equals 方法重写的规则
判断一定相等(引用一致)
判断一定不等(类型不一致)
判断可能相等(需要把当前的对象给强转之后进行比较)
hashCode 重写规则
根据当前对象的唯一标识进行重写
如果为空就直接返回0,不为空就返回唯一标识的 hashCode 即可。
toString 重写规则,字符串加上 '' 区别非字符串
类名 + {field1=value1, field2=value2}
例如:Person{id=123,name="tom"}
例如:
package com.dada.shiro.entity;
import java.io.Serializable;
public class Organization implements Serializable {
private Long id;//编号
private String name;// 组织机构名称
private Long parentId;// 父编号
private String parentIds;// 父编号列表
private Boolean available = Boolean.FALSE;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Long getParentId() {
return parentId;
}
public void setParentId(Long parentId) {
this.parentId = parentId;
}
public String getParentIds() {
return parentIds;
}
public void setParentIds(String parentIds) {
this.parentIds = parentIds;
}
public Boolean getAvailable() {
return available;
}
public void setAvailable(Boolean available) {
this.available = available;
}
public boolean isRootNode() {
return parentId == 0;
}
public String makeSelfAsParentIds() {
return getParentIds() + getId() + "/";
}
@Override
public boolean equals(Object that) {
// 1.判断一定相等
if(this == that) return true;
// 2.判断一定不等
if(that == null || getClass() != that.getClass()) return false;
// 3.判断可能相等的情况
Organization thatObj = (Organization) that;
if(id==null ? thatObj.id !=null : !id.equals(thatObj.id)) return false;
return true;
}
@Override
public int hashCode() {
return id == null ? 0 : id.hashCode();
}
@Override
public String toString() {
return "Organization {" +
"id=" + id +
", name='" + name + "'" +
", parentId=" + parentId +
", parentIds='" + parentIds + "'" +
", available=" + available
+ "}";
}
}