Java判断2个List集合是否相等(不考虑元素的顺序)

package com.lxk.model;

import lombok.allargsconstructor;

import lombok.data;

import lombok.noargsconstructor;

import java.util.collection;

import java.util.objects;

/**

  * table metadata.

  *

  * @author lxk

  */

@data

@allargsconstructor

@noargsconstructor

public class tablemetadata {

   private collection<columnmetadata> columnmetadata;

   @override

   public boolean equals(object o) {

     if ( this == o) {

       return true ;

     }

     if (o == null || getclass() != o.getclass()) {

       return false ;

     }

     tablemetadata that = (tablemetadata) o;

     if (columnmetadata.size() != that.getcolumnmetadata().size()) {

       return false ;

     }

     return columnmetadata.containsall(that.getcolumnmetadata());

   }

   @override

   public int hashcode() {

     return objects.hash(columnmetadata);

   }

}

package com.lxk.model;

import lombok.allargsconstructor;

import lombok.data;

import lombok.noargsconstructor;

import java.util.objects;

/**

  * column metadata.

  *

  * @author lxk

  */

@data

@noargsconstructor

@allargsconstructor

public final class columnmetadata {

   private string columnname;

   private string columntype;

   private boolean primarykey;

   @override

   public boolean equals(object o) {

     if ( this == o) {

       return true ;

     }

     if (o == null || getclass() != o.getclass()) {

       return false ;

     }

     columnmetadata that = (columnmetadata) o;

     return primarykey == that.primarykey &&

         objects.equals(columnname, that.columnname) &&

         objects.equals(columntype, that.columntype);

   }

   @override

   public int hashcode() {

     return objects.hash(columnname, columntype, primarykey);

   }

   @override

   public string tostring() {

     return "columnmetadata{" +

         "columnname='" + columnname + '\ '' +

         ", columntype='" + columntype + '\ '' +

         ", primarykey=" + primarykey +

         '}' ;

   }

}

package com.lxk测试数据montest;

import com.google测试数据mon.collect.lists;

import com.lxk.model.columnmetadata;

import com.lxk.model.tablemetadata;

import java.util.collection;

/**

  * 测试equals的各种情况

  *

  * @author lxk on 2018/9/17

  */

public class equalstest {

   public static void main(string[] args) {

     testcollectionequal();

   }

   /**

    * 比较2个集合是否是相同的，不考虑集合的顺序，只要里面的元素确实相同即可。

    */

   private static void testcollectionequal() {

     columnmetadata c1 = new columnmetadata( "age1" , "name" , true );

     columnmetadata c2 = new columnmetadata( "age2" , "name" , true );

     columnmetadata c3 = new columnmetadata( "age3" , "name" , true );

     columnmetadata c4 = new columnmetadata( "age4" , "name" , true );

     collection<columnmetadata> list1 = lists.newarraylist(c1, c2, c3);

     collection<columnmetadata> list2 = lists.newarraylist(c2, c3, c1);

     tablemetadata table1 = new tablemetadata(list1);

     tablemetadata table2 = new tablemetadata(list2);

     boolean equals = table1.equals(table2);

     system.out.println(equals);

   }

}