先引入pom依赖

  org.springframework.boot
  spring-boot-starter-test
  test
 

代码1

public class MongoUser implements Serializable{
 private static final long serialVersionUID = 1L;
 @Id
   private String id;
   private String name;
   private String age;
 
   public String getId() {
     return id;
   }
 
   public void setId(String id) {
     this.id = id;
   }
 
   public String getName() {
     return name;
   }
 
   public void setName(String name) {
     this.name = name;
   }
 
   public String getAge() {
     return age;
   }
 
   public void setAge(String age) {
     this.age = age;
   }
 
   @Override
   public boolean equals(Object o) {
     if (this == o) return true;
     if (o == null || getClass() != o.getClass()) return false;
     MongoUser user = (MongoUser) o;
     return Objects.equals(id, user.id) &&
         Objects.equals(name, user.name) &&
         Objects.equals(age, user.age);
   }
 
   @Override
   public int hashCode() {
     return Objects.hash(id, name, age);
   }
}

代码2

@RunWith(SpringRunner.class)
@SpringBootTest
@Transactional
public class ApplicationTests {
 
 @Autowired
 private RedisService redisService;
 
 @Autowired
 private UserDao userDao;
 
 @Autowired
 private JdbcTemplate jdbcTemplate;
 
 @Autowired
 private MongoTemplate mongoTemplate;
 
 @Test
  public void hello() {
    System.out.println("hello world");
    redisService.setObjectJSON("test", "1");
    System.out.println("使用了redisservice");
    User user = userDao.find("id=?", 1l).first();
    System.out.println("打印出了一个用户名"+user.userName);
    List> queryForList = jdbcTemplate.queryForList("select id,user_name from c_user where id<2");
    for (Map map : queryForList) {
  Object object = map.get("id");
  System.out.println(object);
  Object object2 = map.get("user_name");
  System.out.println(object2);
 }
    MongoUser mongoUser2 = new MongoUser();
    mongoUser2.setId("1");
    mongoUser2.setName("小明");
 mongoTemplate.insert(mongoUser2);
    List findAll = mongoTemplate.findAll(MongoUser.class);
    for (MongoUser mongoUser : findAll) {
  System.out.println("id="+mongoUser.getId());
  System.out.println("id="+mongoUser.getName());
 }
  }
 
 public static void main(String[] args) {
 HashMap hashMap = new HashMap();
 hashMap.put("a", 1);
 hashMap.put("b", 2);
 Set keySet = hashMap.keySet();
 for (String string : keySet) {
  System.out.println(string);
  Object object = hashMap.get(string);
  System.out.println(object);
  System.out.println("================");
 }
 }
 
}