SpringBoot的MyBatis的业务类

一 AreaService接口

package com.imooc.demo.service;

import java.util.List;

import com.imooc.demo.entity.Area;

public interface AreaService {

    /**
     * 获取区域列表
     *
     * @return
     */
    List<Area> getAreaList();

    /**
     * 通过区域Id获取区域信息
     *
     * @param areaId
     * @return
     */
    Area getAreaById(int areaId);

    /**
     * 增加区域信息
     *
     * @param area
     * @return
     */
    boolean addArea(Area area);

    /**
     * 修改区域信息
     *
     * @param area
     * @return
     */
    boolean modifyArea(Area area);

    /**
     * 删除区域信息
     *
     * @param area
     * @return
     */
    boolean deleteArea(int areaId);

}

二 AreaServiceImpl实现类

package com.imooc.demo.service.impl;

import java.util.Date;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.imooc.demo.dao.AreaDao;
import com.imooc.demo.entity.Area;
import com.imooc.demo.service.AreaService;

@Service
public class AreaServiceImpl implements AreaService {
    @Autowired
    private AreaDao areaDao;

    @Override
    public List<Area> getAreaList() {
        // 返回所有的区域信息
        return areaDao.queryArea();
    }

    @Override
    public Area getAreaById(int areaId) {
        return areaDao.queryAreaById(areaId);
    }

    @Transactional
    @Override
    public boolean addArea(Area area) {
        // 空值判断，主要是判断areaName不为空
        if (area.getAreaName() != null && !"".equals(area.getAreaName())) {
            // 设置默认值
            area.setCreateTime(new Date());
            area.setLastEditTime(new Date());
            try {
                int effectedNum = areaDao.insertArea(area);
                if (effectedNum > 0) {
                    return true;
                } else {
                    throw new RuntimeException("添加区域信息失败!");
                }
            } catch (Exception e) {
                throw new RuntimeException("添加区域信息失败:" + e.toString());
            }
        } else {
            throw new RuntimeException("区域信息不能为空！");
        }
    }

    @Transactional
    @Override
    public boolean modifyArea(Area area) {
        // 空值判断，主要是areaId不为空
        if (area.getAreaId() != null && area.getAreaId() > 0) {
            // 设置默认值
            area.setLastEditTime(new Date());
            try {
                // 更新区域信息
                int effectedNum = areaDao.updateArea(area);
                if (effectedNum > 0) {
                    return true;
                } else {
                    throw new RuntimeException("更新区域信息失败!");
                }
            } catch (Exception e) {
                throw new RuntimeException("更新区域信息失败:" + e.toString());
            }
        } else {
            throw new RuntimeException("区域信息不能为空！");
        }
    }

    @Transactional
    @Override
    public boolean deleteArea(int areaId) {
        if (areaId > 0) {
            try {
                // 删除区域信息
                int effectedNum = areaDao.deleteArea(areaId);
                if (effectedNum > 0) {
                    return true;
                } else {
                    throw new RuntimeException("删除区域信息失败!");
                }
            } catch (Exception e) {
                throw new RuntimeException("删除区域信息失败:" + e.toString());
            }
        } else {
            throw new RuntimeException("区域Id不能为空！");
        }
    }
}

三 事务处理

package com.imooc.demo.config.service;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;

/**
* 对标spring-service里面的transactionManager
* 继承TransactionManagementConfigurer是因为开启annotation-driven
*
* @author xiangze
*
*/
@Configuration
// 首先使用注解 @EnableTransactionManagement 开启事务支持后
// 在Service方法上添加注解 @Transactional 便可
@EnableTransactionManagement
public class TransactionManagementConfiguration implements TransactionManagementConfigurer {

    @Autowired
    // 注入DataSourceConfiguration里边的dataSource,通过createDataSource()获取
    private DataSource dataSource;

    @Override
    /**
     * 关于事务管理，需要返回PlatformTransactionManager的实现
     */
    public PlatformTransactionManager annotationDrivenTransactionManager() {
        return new DataSourceTransactionManager(dataSource);
    }

}