mapper:
mappers: com.common.dao
not-empty: false
identity: MYSQL
pagehelper:
helperDialect: mysql
reasonable: true
supportMethodsArguments: true
params: count=countSql
<dependency>
<groupId>tk.mybatisgroupId>
<artifactId>mapper-spring-boot-starterartifactId>
<version>2.0.0version>
dependency>
<dependency>
<groupId>com.github.pagehelpergroupId>
<artifactId>pagehelper-spring-boot-starterartifactId>
<version>1.1.1version>
dependency>
使用generator自动生成代码
<plugin>
<groupId>org.mybatis.generatorgroupId>
<artifactId>mybatis-generator-maven-pluginartifactId>
<version>1.3.5version> # 1.3.6就报错了
<configuration>
<configurationFile>....../generator.xmlconfigurationFile>
<overwrite>trueoverwrite>
configuration>
<dependencies>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.34version>
dependency>
<dependency>
<groupId>org.mybatis.generatorgroupId>
<artifactId>mybatis-generator-coreartifactId>
<version>1.3.5version>
dependency>
<dependency>
<groupId>tk.mybatisgroupId>
<artifactId>mapperartifactId>
<version>3.4.0version>
dependency>
dependencies>
plugin>
<generatorConfiguration>
<properties resource="generator.properties"/> #这里记录了数据库连接
<context defaultModelType="flat" id="mysql" targetRuntime="MyBatis3Simple">
<property name="javaFileEncoding" value="UTF-8"/>
<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
<property name="mappers" value=".目录.BaseMapper"/>
plugin>
<jdbcConnection driverClass="${driverClassName}"
connectionURL="${url}"
userId="${username}" password="${password}">
jdbcConnection>
<javaModelGenerator targetPackage="com.common.model.auto"
targetProject="src/main/java">
<property name="trimStrings" value="true"/>
javaModelGenerator>
<sqlMapGenerator targetPackage="mybatis.auto"
targetProject="src/main/resources">
sqlMapGenerator>
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.common.dao.auto"
targetProject="src/main/java">
javaClientGenerator>
<table schema="" tableName="t_city" domainObjectName="TcityEntity">table>
......
context>
generatorConfiguration>
项目内使用maven命令:mybatis-generator:generate -e
现在xml生成的里面均不包含sql语句了,其实我测试了删除这个xml也行,实体类已经有了表、主键、列注解,使用tk.mysql即可。
根mapper如下:
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;
// 继承的这2个里面就包含了crud、以及分页、条件查询的所有组件了
public interface BaseMapper<T> extends Mapper<T>, MySqlMapper<T>{
}
其他继承主mapper的mapper文件如下:
public interface TcityEntityMapper extends BaseMapper<TcityEntity> {
}
代码如下:
import com.github.pagehelper.PageHelper;
import tk.mybatis.mapper.entity.Example;
......
@RestController
@RequestMapping("/city")
public class CityController {
@Autowired
private TcityEntityMapper cityDao;
@RequestMapping("add")
public Object add() {
TcityEntity entity = new TcityEntity();
entity.setId(100000);
entity.setCityName("test");
// cityDao.insert(entity);
# 返回主键
int i = cityDao.insertUseGeneratedKeys(entity);
return i;
}
# 简单测试主键查询
@RequestMapping("/simple")
public Object simple(){
return cityDao.selectByPrimaryKey(1);
}
@RequestMapping("/tk")
public Object tk() {
//分页,根据默认配置
int page = 1;
int pageSize = 5;
PageHelper.startPage(page, pageSize);
// tk.mybatis有一个内置的example类
Example example = new Example(TcityEntity.class);
example.setOrderByClause("id desc");
Example.Criteria criteria = example.createCriteria();
criteria.andBetween("id", 0, 100);
example.and(criteria);
return cityDao.selectByExample(example);
}
}
访问:http://localhost:8080/city/tk
结果:
[{“id”:100,”cityCode”:”331100”,”cityName”:”x”,”provCode”:”330000”,”py”:”L”,”isDelete”:false,”sort”:null,”updateTime”:1449553403000},{“id”:99,……}]
Application方法增加了@MapperScan(“mapper目录”),但是仍旧是扫描不到,无论是引入
import org.mybatis.spring.annotation.MapperScan;
还是
import tk.mybatis.spring.annotation.MapperScan;
均不行。
引入tk.mybatis的MapperScan报范型转型错误,引入org则报找不到mapper文件,也是奇怪了。
网上的解决案例:https://yq.aliyun.com/articles/5831 ,我没有试验。这个是通过java文件配置,因为这个是简单配置,就单纯使用yml配置了,所以就暂时不改了。
测试成功的朋友帮忙告诉我一声。