java使用stream判断两个list元素的属性并输出方式

/**

* 使用stream判断两个list中元素不同的item

*/

@Test

public void test1(){

List<Param> stringList1 = new LinkedList<Param>(){{

     add( new Param( 1 , "1111" ));

     add( new Param( 2 , "2222" ));

     add( new Param( 3 , "3333" ));

}};

List<Param> stringList2 = new LinkedList<Param>(){{

     add( new Param( 1 , "1111" ));

     add( new Param( 2 , "4444" ));

     add( new Param( 3 , "5555" ));

}};

// 判断key相同，value相同的元素

Map<Integer, String> tmpList2 = stringList2.stream().collect(Collectors.toMap(Param::getId, Param::getName));

var tmplist = stringList1.stream().filter(item -> (tmpList2.get(item.getId()) != null && tmpList2.get(item.getId()).equals(item.getName()))).collect(Collectors.toList());

System.out.println(tmplist);

}

@Setter

@Getter

@ToString

@AllArgsConstructor

public static class Param{

private Integer id;

private String name;

}

/**

  * 使用stream判断两个list中元素不同的item

  */

@Test

public void test1(){

     List<Param> stringList1 = new LinkedList<Param>(){{

         add( new Param( 1 , "1111" , "b" ));

         add( new Param( 2 , "2222" , "c" ));

         add( new Param( 3 , "3333" , "a" ));

     }};

     List<Param> stringList2 = new LinkedList<Param>(){{

         add( new Param( 1 , "1111" , "c" ));

         add( new Param( 2 , "4444" , "b" ));

         add( new Param( 3 , "5555" , "a" ));

     }};

    // 判断key相同，value相同的元素

    Map<Integer, String> tmpList2 = stringList2.stream().collect(Collectors.toMap(Param::getId, Param::getName));

    var tmplist = stringList1.stream().filter(item -> (tmpList2.get(item.getId()) != null && tmpList2.get(item.getId()).equals(item.getName()))).collect(Collectors.toList());

    System.out.println(tmplist);

    // 如果需要判断多个值，直接将对象加入进去

    Map<Integer, Param> tmpList3 = stringList2.stream().collect(Collectors.toMap(Param::getId, Function.identity()));

    var tmplist2 = stringList1.stream().filter(item -> (tmpList3.get(item.getId()) != null && tmpList3.get(item.getId()).getType().equals(item.getType()))).collect(Collectors.toList());

    System.out.println(tmplist2);

}

@Setter

@Getter

@ToString

@AllArgsConstructor

@EqualsAndHashCode

public static class Param{

     private Integer id;

     private String name;

     private String type;

}

int intCheck = profileServiceDtoList.stream().filter(e ->

            "1" .equals(e.getEnable())

            &&(( "PROFILE-IN-MOSHOW" .equals(e.getServiceIdentifier()))||( "PROFILE-IN-ADC" .equals(e.getServiceIdentifier())))  

    ).collect(Collectors.toList()).size();

public static void main(String[] args) {

    List<ProfileServiceDto> profileServiceDtoList= new ArrayList<>( 3 );

    ProfileServiceDto profileService1 = new ProfileServiceDto();

    profileService1.setServiceId(1001L);

    profileService1.setServiceIdentifier( "PROFILE-IN-MOSHOW" );

    profileService1.setEnable( "1" );

    profileServiceDtoList.add(profileService1);

    ProfileServiceDto profileService2 = new ProfileServiceDto();

    profileService2.setServiceId(1002L);

    profileService2.setServiceIdentifier( "PROFILE-IN-ADC" );

    profileService2.setEnable( "1" );

    profileServiceDtoList.add(profileService2);

    ProfileServiceDto profileService3 = new ProfileServiceDto();

    profileService3.setServiceId(1003L);

    profileService3.setServiceIdentifier( "PROFILE-XXX-ABC" );

    profileService3.setEnable( "1" );

    profileServiceDtoList.add(profileService3);

    int intCheck = profileServiceDtoList.stream().filter(e ->

            "1" .equals(e.getEnable())&&(( "PROFILE-IN-MOSHOW" .equals(e.getServiceIdentifier()))||( "PROFILE-IN-ADC" .equals(e.getServiceIdentifier())))

    ).collect(Collectors.toList()).size();

    System.out.println( "intCheck->" +intCheck);

     if (intCheck> 1 ){

         System.error.println( "In one profile, cannot contain two more PROFILE-IN profile." );

     }

}

         //profileServiceDtoList路上,不累赘

         //多了一个profileService1.setGroupId("A");profileService1.setGroupId("B");profileService3.setGroupId("A");

         List<String> groupList = new ArrayList<>( 4 );

        profileServiceDtoList.stream().forEach(e -> {

            if ( "Y" .equals(e.getEnable()) && StringUtils.isNotEmpty(e.getGroupId())) {

                groupList.add(e.getGroupId());

            }

        });

        int distinctGroupSize = groupList.stream().distinct().collect(Collectors.toList()).size();

        if (groupList.size() > distinctGroupSize) {

            throw new ValidationException( "100001" , "In one profile, the services with the same groupId cannot co-exist." );

        }