SpringBoot集成Mybatis+xml格式的sql配置文件
最近一直在研究SpringBoot技术，由于项目需要，必须使用Mybatis持久化数据。所以就用SpringBoot集成Mybatis。
由于项目使用的是xml配置文件格式的SQL管理，所以SpringBoot必须配置Mybatis文件。但这样做的话又与SpringBoot的零xml配置冲突。
所以索性使用java类来配置Mybatis。
下面是Mybatis的配置类：
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import com.github.pagehelper.PageHelper;
import tk.mybatis.spring.mapper.MapperScannerConfigurer;
/**
* Mybatis & Mapper & PageHelper 配置
*
* @file MybatisConfigurer.java
* @author zoboy
* @version 2.0.0
* @todo TODO Copyright(C), 2017 xi'an Coordinates Software Development Co.,
* Ltd.
*/
@Configuration
public class MybatisConfigurer {
static final String ALIASESPACKAG="com.cictec.cloud.bus.middleware.dc.common.biz.entity";
static final String MAPPERXMLPATH="classpath:sqlmapper/*.xml";
static final String BASEPACKAGE="com.cictec.cloud.bus.middleware.dc.mapper";
static final String DATABSAENAME="POSTGRESQL";
@Bean
public SqlSessionFactory sqlSessionFactoryBean(DataSource dataSource) throws Exception {
SqlSessionFactoryBean factory = new SqlSessionFactoryBean();
factory.setDataSource(dataSource);
//实体类的包名（根据你的项目自行修改）
factory.setTypeAliasesPackage(ALIASESPACKAG);
//配置分页插件，详情请查阅官方文档
PageHelper pageHelper = new PageHelper();
Properties properties = new Properties();
properties.setProperty("pageSizeZero", "true");//分页尺寸为0时查询所有纪录不再执行分页
properties.setProperty("reasonable", "true");//页码<=0 查询第一页，页码>=总页数查询最后一页
properties.setProperty("supportMethodsArguments", "true");//支持通过 Mapper 接口参数来传递分页参数
pageHelper.setProperties(properties);
//添加插件
factory.setPlugins(new Interceptor[]{pageHelper});
//添加XML目录
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
//*.mapper.xml的地址（根据你的项目自行修改）
factory.setMapperLocations(resolver.getResources(MAPPERXMLPATH));
return factory.getObject();
}
@Bean
public MapperScannerConfigurer mapperScannerConfigurer() {
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
//*.mapper(*.dao)的包名（根据你的项目自行修改）
mapperScannerConfigurer.setBasePackage(BASEPACKAGE);
//配置通用Mapper，详情请查阅官方文档
Properties properties = new Properties();
//tk.mybatis.mapper.common.Mapper
properties.setProperty("mappers", "tk.mybatis.mapper.common.Mapper");
properties.setProperty("notEmpty", "false");//insert、update是否判断字符串类型!='' 即 test="str != null"表达式内是否追加 and str != ''
//使用的数据库类型名称（MySQL,Oracle,Postgresql...）
properties.setProperty("IDENTITY", DATABSAENAME);
mapperScannerConfigurer.setProperties(properties);
return mapperScannerConfigurer;
}
}
可以直接在你的项目中使用这个配置类，所要改动的地方有3处，我在代码中用注释标注了。
项目结构如下图所示：
经测试，可以正常运行。
Mybatis xml文件配置sql标准格式
1.Mapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.test.dao.StrategyDao">
<resultMap id="StrategyResultMap" type="com.test.entity.Strategy">
<result property="id" column="id"/>
<result property="projectId" column="project_id"/>
<result property="strategyType" column="strategy_type"/>
<result property="strategyName" column="strategy_name"/>
<result property="alias" column="alias"/>
</resultMap>
<select id="findNameList" resultType="java.util.Map" parameterType="com.test.entity.Strategy">
SELECT DISTINCT t.strategy_name strategyName,t.alias from test_strategy t WHERE
t.project_id=#{projectId, jdbcType=INTEGER} AND t.del_status=0 AND t.strategy_type =#{strategyType}
AND (t.strategy_name LIKE concat('%',#{strategyName,jdbcType=VARCHAR},'%')
or t.alias LIKE concat('%',#{strategyName,jdbcType=VARCHAR},'%'))
</select>
</mapper>
2.Dao
@MyBatisRepository
public interface StrategyDao extends ICrudDao<Strategy, Integer> {
List<Map<String,Object>> findNameList(Strategy entity);
}
3.service
public List<Map<String, Object>> findNameList(Strategy strategy) throws Exception {
try {
return dao.findNameList(strategy);
} catch (Exception var3) {
throw new MySqlException("P2101", "数据库执行异常", var3);
}
}
-----------
public class MySqlException extends ServiceException {
public MySqlException(String errorCode, Object[] args) {
super(errorCode, args);
}
public MySqlException(String errorCode) {
super(errorCode);
}
public MySqlException(String errorCode, String message) {
super(errorCode, message);
}
public MySqlException(String errorCode, String message, Throwable cause) {
super(errorCode, message, cause);
}
}
4.Controller
@RequestMapping("/nameList")
public Map<String, Object> findNameList(@RequestBody Strategy strategy) throws Exception {
try {
return result(strategyService.findNameList(strategy));
} catch (Exception e) {
throw e;
}
}
-----------
public Map<String, Object> result(Object object) {
Map<String, Object> result = new HashMap();
ResultUtil.addSuccessResult(result, object);
return result;
}
-------
public class ResultUtil {
public ResultUtil() {
}
public static void addSuccessResult(Map<String, Object> resultMap, Object data) {
resultMap.put("result", "1");
resultMap.put("msg", "调用成功！");
resultMap.put("code", "200");
resultMap.put("data", data);
}
}
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
