-
pom.xml
1 <dependencies> 2 <dependency> 3 <groupId>org.springframework.boot</groupId> 4 <artifactId>spring-boot-starter</artifactId> 5 </dependency> 6 <dependency> 7 <groupId>org.springframework.boot</groupId> 8 <artifactId>spring-boot-starter-test</artifactId> 9 <scope>test</scope> 10 </dependency> 11 <dependency> 12 <groupId>org.projectlombok</groupId> 13 <artifactId>lombok</artifactId> 14 <optional>true</optional> 15 </dependency> 16 <dependency> 17 <groupId>com.baomidou</groupId> 18 <artifactId>mybatis-plus-boot-starter</artifactId> 19 <version>3.2.0</version> 20 </dependency> 21 <dependency> 22 <groupId>com.h2database</groupId> 23 <artifactId>h2</artifactId> 24 <scope>runtime</scope> 25 </dependency> 26 <dependency> 27 <groupId>p6spy</groupId> 28 <artifactId>p6spy</artifactId> 29 </dependency> 30 </dependencies> 31 32 <build> 33 <plugins> 34 <plugin> 35 <groupId>org.springframework.boot</groupId> 36 <artifactId>spring-boot-maven-plugin</artifactId> 37 </plugin> 38 </plugins> 39 </build>
-
application.yml
# DataSource Config spring: datasource: driver-class-name: org.h2.Driver url: jdbc:h2:tcp://192.168.180.115:19200/~/mem/test username: root password: test # Logger Config logging: level: com.mp.crud: debug -
dao层
public interface UserMapper extends BaseMapper<User> { }
-
实体类
1 @Data 2 @Accessors(chain = true) 3 @TableName("user") 4 public class User { 5 6 private Long id; 7 private String name; 8 private Integer age; 9 private String email; 10 11 @TableField(exist = false) 12 private Integer count; 13 }
-
1 @Configuration 2 @MapperScan("com.mp.crud.mapper") 3 public class MybatisPlusConfig { 4 5 } 6
-
测试类
1 @SpringBootTest 2 @RunWith(SpringRunner.class) 3 class CrudApplicationTests { 4 5 @Resource 6 private UserMapper mapper; 7 8 @Test 9 public void aInsert() { 10 User user = new User(); 11 user.setName("小羊"); 12 user.setAge(3); 13 user.setEmail("[email protected]"); 14 assertThat(mapper.insert(user)).isGreaterThan(0); 15 // 成功直接拿会写的 ID 16 assertThat(user.getId()).isNotNull(); 17 } 18 19 20 @Test 21 public void bDelete() { 22 assertThat(mapper.deleteById(3L)).isGreaterThan(0); 23 assertThat(mapper.delete(new QueryWrapper<User>() 24 .lambda().eq(User::getName, "Sandy"))).isGreaterThan(0); 25 } 26 27 28 @Test 29 public void cUpdate() { 30 //UPDATE user SET email=? WHERE id=? 31 assertThat(mapper.updateById(new User().setId(1L).setEmail("[email protected]"))).isGreaterThan(0); 32 //UPDATE user SET name=?, age=? WHERE (id = ?) 33 assertThat( 34 mapper.update( 35 new User().setName("mp"), 36 Wrappers.<User>lambdaUpdate() 37 .set(User::getAge, 3) 38 .eq(User::getId, 2) 39 ) 40 ).isGreaterThan(0); 41 User user = mapper.selectById(2); 42 assertThat(user.getAge()).isEqualTo(3); 43 assertThat(user.getName()).isEqualTo("mp"); 44 45 mapper.update( 46 null, 47 Wrappers.<User>lambdaUpdate().set(User::getEmail, null).eq(User::getId, 2) 48 ); 49 assertThat(mapper.selectById(1).getEmail()).isEqualTo("[email protected]"); 50 user = mapper.selectById(2); 51 assertThat(user.getEmail()).isNull(); 52 assertThat(user.getName()).isEqualTo("mp"); 53 54 mapper.update( 55 new User().setEmail("[email protected]"), 56 new QueryWrapper<User>() 57 .lambda().eq(User::getId, 2) 58 ); 59 user = mapper.selectById(2); 60 assertThat(user.getEmail()).isEqualTo("[email protected]"); 61 62 mapper.update( 63 new User().setEmail("[email protected]"), 64 Wrappers.<User>lambdaUpdate() 65 .set(User::getAge, null) 66 .eq(User::getId, 2) 67 ); 68 user = mapper.selectById(2); 69 assertThat(user.getEmail()).isEqualTo("[email protected]"); 70 assertThat(user.getAge()).isNull(); 71 } 72 73 74 @Test 75 public void dSelect() { 76 mapper.insert( 77 new User().setId(10086L) 78 .setName("miemie") 79 .setEmail("[email protected]") 80 .setAge(3)); 81 assertThat(mapper.selectById(10086L).getEmail()).isEqualTo("[email protected]"); 82 User user = mapper.selectOne(new QueryWrapper<User>().lambda().eq(User::getId, 10086)); 83 assertThat(user.getName()).isEqualTo("miemie"); 84 assertThat(user.getAge()).isEqualTo(3); 85 86 List<User> users = mapper.selectList(Wrappers.<User>lambdaQuery().select(User::getId)); 87 System.out.println(users); 88 89 mapper.selectList(Wrappers.<User>lambdaQuery().select(User::getId)) 90 .forEach(x -> { 91 assertThat(x.getId()).isNotNull(); 92 assertThat(x.getEmail()).isNull(); 93 assertThat(x.getName()).isNull(); 94 assertThat(x.getAge()).isNull(); 95 }); 96 mapper.selectList(new QueryWrapper<User>().select("id", "name")) 97 .forEach(x -> { 98 assertThat(x.getId()).isNotNull(); 99 assertThat(x.getEmail()).isNull(); 100 assertThat(x.getName()).isNotNull(); 101 assertThat(x.getAge()).isNull(); 102 }); 103 } 104 105 @Test 106 public void orderBy() { 107 List<User> users = mapper.selectList(Wrappers.<User>query().orderByAsc("age")); 108 System.out.println(users); 109 //assertThat(users).isNotEmpty(); 110 } 111 112 @Test 113 public void selectMaps() { 114 List<Map<String, Object>> mapList = mapper.selectMaps(Wrappers.<User>query().orderByAsc("age")); 115 assertThat(mapList).isNotEmpty(); 116 assertThat(mapList.get(0)).isNotEmpty(); 117 //{ID=1189005852158324737, [email protected], NAME=小羊, AGE=3} 118 System.out.println(mapList.get(0)); 119 } 120 121 @Test 122 public void selectMapsPage() { 123 IPage<Map<String, Object>> page = mapper.selectMapsPage(new Page<>(1, 5), Wrappers.<User>query().orderByAsc("age")); 124 assertThat(page).isNotNull(); 125 assertThat(page.getRecords()).isNotEmpty(); 126 assertThat(page.getRecords().get(0)).isNotEmpty(); 127 } 128 129 @Test 130 public void orderByLambda() { 131 //SELECT id,name,email,age FROM user ORDER BY age ASC 132 List<User> users = mapper.selectList(Wrappers.<User>lambdaQuery().orderByAsc(User::getAge)); 133 List<User> users1 = mapper.selectList(Wrappers.<User>query().orderByAsc("age")); 134 System.out.println(users1); 135 //assertThat(users).isNotEmpty(); 136 } 137 138 @Test 139 public void testSelectMaxId() { 140 // SELECT max(id) as id FROM user 141 QueryWrapper<User> wrapper = new QueryWrapper<>(); 142 wrapper.select("max(id) as id"); 143 //User(id=1189005852158324737, name=null, age=null, email=null, count=null) 144 User user = mapper.selectOne(wrapper); 145 System.out.println(user); 146 System.out.println("maxId=" + user.getId()); 147 List<User> users = mapper.selectList(Wrappers.<User>lambdaQuery().orderByDesc(User::getId)); 148 Assert.assertEquals(user.getId().longValue(), users.get(0).getId().longValue()); 149 } 150 151 @Test 152 public void testGroup() { 153 QueryWrapper<User> wrapper = new QueryWrapper<>(); 154 wrapper.select("age, count(*)") 155 .groupBy("age"); 156 List<Map<String, Object>> maplist = mapper.selectMaps(wrapper); 157 for (Map<String, Object> mp : maplist) { 158 System.out.println(mp); 159 } 160 /** 161 * lambdaQueryWrapper groupBy orderBy 162 */ 163 LambdaQueryWrapper<User> lambdaQueryWrapper = new QueryWrapper<User>().lambda() 164 .select(User::getAge) 165 .groupBy(User::getAge) 166 .orderByAsc(User::getAge); 167 for (User user : mapper.selectList(lambdaQueryWrapper)) { 168 System.out.println(user); 169 } 170 } 171 172 @Test 173 public void testTableFieldExistFalse(){ 174 QueryWrapper<User> wrapper = new QueryWrapper<>(); 175 wrapper.select("age, count(age) as count") 176 .groupBy("age"); 177 List<User> list = mapper.selectList(wrapper); 178 list.forEach(System.out::println); 179 list.forEach(x->{ 180 Assert.assertNull(x.getId()); 181 Assert.assertNotNull(x.getAge()); 182 Assert.assertNotNull(x.getCount()); 183 }); 184 mapper.insert( 185 new User().setId(10088L) 186 .setName("miemie") 187 .setEmail("[email protected]") 188 .setAge(3)); 189 User miemie = mapper.selectById(10088L); 190 Assert.assertNotNull(miemie); 191 192 } 193 194 } 195
-
测试结果（我处只运行了部分的测试方法）
SpringBoot整合Mybatisplus3.x之CRUD(一)
猜你喜欢
转载自www.cnblogs.com/dalianpai/p/11758027.html
今日推荐
周排行