HashCodeBuilder的用法,有人知道吗??

Question

org.apache.commons.lang.builder.HashCodeBuilder;这个类的用法??求助于各位大侠

Answer 1

用法很简单的。
给你举个例子，结合EqualsBuilder的用法：
package com.bryantd.hibernate.entity;import java.io.Serializable;
import java.util.*;import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;public class Address implements Serializable {
private Integer id;
private String address;
private String telephone;

private User user;

public Address(String address, String telephone) {
super();
// TODO Auto-generated constructor stub
this.address = address;
this.telephone = telephone;
}

public Address() {}

public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}

public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}

public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}

public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}

public boolean equals(Object object) {
if (!(object instanceof Address)) {
return false;
}
Address anotherAddress = (Address)object;
return new EqualsBuilder().appendSuper(super.equals(object))
                          .append(this.getAddress(), anotherAddress.getAddress())
                          .append(this.getTelephone(), anotherAddress.getTelephone())
                          .isEquals();
}

public int hashCode() {
return new HashCodeBuilder().appendSuper(super.hashCode())
                            .append(this.getAddress())
                            .append(this.getTelephone())
                            .hashCode();
} /*
public boolean equals(Object object) {
// TODO Auto-generated method stub
if (onject == this) {
    return true;
}
if (object instanceof Address) {
Address address = (Address)object;
if (getAddress() == address.getAddress()) return true;
}
return false;
} public int hashCode() {
// TODO Auto-generated method stub
return getTelephone().hashCode() * getAddress().hashCode();
}
*/
}