/**
   * 通過單個ID主鍵進(jìn)行查詢
   */
  @Test
  public void selectById() {
    User user = userMapper.selectById(1094592041087729666L);
    System.out.println(user);
  }

  /**
   * 通過多個ID主鍵查詢
   */
  @Test
  public void selectByList() {
    List<Long> longs = Arrays.asList(1094592041087729666L, 1094590409767661570L);
    List<User> users = userMapper.selectBatchIds(longs);
    users.forEach(System.out::println);
  }

  /**
   * 通過Map參數(shù)進(jìn)行查詢
   */
  @Test
  public void selectByMap() {
    Map<String, Object> params = new HashMap<>();
    params.put("name", "張雨琪");
    List<User> users = userMapper.selectByMap(params);
    users.forEach(System.out::println);
  }

/**
   * 名字包含雨并且年齡小于40
   * <p>
   * WHERE name LIKE '%雨%' AND age < 40
   */
  @Test
  public void selectByWrapperOne() {
    QueryWrapper<User> wrapper = new QueryWrapper();
    wrapper.like("name", "雨").lt("age", 40);
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * 名字包含雨
   * 年齡大于20小于40
   * 郵箱不能為空
   * <p>
   * WHERE name LIKE '%雨%' AND age BETWEEN 20 AND 40 AND email IS NOT NULL
   */
  @Test
  public void selectByWrapperTwo() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.like("name", "雨").between("age", 20, 40).isNotNull("email");
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * 名字為王性
   * 或者年齡大于等于25
   * 按照年齡降序排序，年齡相同按照id升序排序
   * <p>
   * WHERE name LIKE '王%' OR age >= 25 ORDER BY age DESC , id ASC
   */
  @Test
  public void selectByWrapperThree() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.likeRight("name", "王").or()
        .ge("age", 25).orderByDesc("age").orderByAsc("id");
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * 查詢創(chuàng)建時間為2019年2月14
   * 并且上級領(lǐng)導(dǎo)姓王
   * <p>
   * WHERE date_format(create_time,'%Y-%m-%d') = '2019-02-14' AND manager_id IN (select id from user where name like '王%')
   */
  @Test
  public void selectByWrapperFour() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.apply("date_format(create_time,'%Y-%m-%d') = {0}", "2019-02-14")
        .inSql("manager_id", "select id from user where name like '王%'");
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * 查詢王姓
   * 并且年齡小于40或者郵箱不為空
   * <p>
   * WHERE name LIKE '王%' AND ( age < 40 OR email IS NOT NULL )
   */
  @Test
  public void selectByWrapperFive() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.likeRight("name", "王").and(qw -> qw.lt("age", 40).or().isNotNull("email"));
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * 查詢王姓
   * 并且年齡大于20 、年齡小于40、郵箱不能為空
   * <p>
   * WHERE name LIKE ? OR ( age BETWEEN ? AND ? AND email IS NOT NULL )
   */
  @Test
  public void selectByWrapperSix() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.likeRight("name", "王").or(
        qw -> qw.between("age", 20, 40).isNotNull("email")
    );
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * (年齡小于40或者郵箱不為空) 并且名字姓王
   * WHERE ( age < 40 OR email IS NOT NULL ) AND name LIKE '王%'
   */
  @Test
  public void selectByWrapperSeven() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.nested(qw -> qw.lt("age", 40).or().isNotNull("email"))
        .likeRight("name", "王");
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * 查詢年齡為30、31、32
   * WHERE age IN (?,?,?)
   */
  @Test
  public void selectByWrapperEight() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.in("age", Arrays.asList(30, 31, 32));
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }

  /**
   * 查詢一條數(shù)據(jù)
   * limit 1
   */
  @Test
  public void selectByWrapperNine() {
    QueryWrapper<User> wrapper = Wrappers.query();
    wrapper.in("age", Arrays.asList(30, 31, 32)).last("limit 1");
    List<User> users = userMapper.selectList(wrapper);
    users.forEach(System.out::println);
  }