SpringBoot集成Mybatis+xml格式的sql配置文件操作

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服务器之家。

原文链接：https://blog.csdn.net/u011051912/article/details/74295172