sql - Java equals() and hashcode() during automatic code generation -

i working on project code gets automatically generated based upon mysql library. jpa, not quite.

this example bean:

public class templatebean implements bean {     private integer templateid;     private integer businesspartnerid;      public templatebean(final integer businesspartnerid) {         this.businesspartnerid = businesspartnerid;     }      private templatebean(final object nullobject, final integer templateid, final integer businesspartnerid) {         this.templateid = templateid;         this.businesspartnerid = businesspartnerid;     }      public templatebean(final resultset rs) throws sqlexception {         this(null, rs.getint(1), rs.getint(2));     }      public integer gettemplateid() {         return templateid;     }      public void settemplateid(final integer templateid) {         this.templateid = templateid;     }      public integer getbusinesspartnerid() {         return businesspartnerid;     }      public void setbusinesspartnerid(final integer businesspartnerid) {         this.businesspartnerid = businesspartnerid;     }      @override     public string tostring() {         return "template(" + templateid + ", " + businesspartnerid + ")";     } } 

now need implement equals() , hashcode(). of course have access data available sql, think implementing equals() should doable, how going create hashcode()?

any tips appreciated.

i suggest use equalsbuilder

import org.apache.commons.lang.builder.equalsbuilder; import org.apache.commons.lang.builder.hashcodebuilder;   public class person {     private string id;     private string name;     private string address;     private string phone;     private string version;      @override     public boolean equals(object object) {         return equalsbuilder.reflectionequals(this, object,);     }      @override     public int hashcode() {         return hashcodebuilder.reflectionhashcode(this);     }      or      /*      * equal() method exclude fields.      * neglect id , version fields.      *       * */     @override     public boolean equals(object object) {         return equalsbuilder.reflectionequals(this, object, "id", "version");     } }