[Java] 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.commontest;
import com.google.common.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);
  }
}