(转)Spring集成MyBatis进行项目开发（三）

色魔王子7 · 发表于 2016-11-28 07:00:25

原文出处： http://wangjie2013.iyunv.com/blog/1996159
Spring集成MyBatis进行项目开发（一）
Spring集成MyBatis进行项目开发（二）
上两章进行了相关环境的配置和测试，接下来是将继续这个样例系统的Dao层，service层和controller层。
AppDao.java
Java代码

package com.pinche.statistic.dao;
import java.util.List;
import com.pinche.statistic.domain.Application;
public interface AppDao {
boolean add(Application app);
boolean delete(String appAccount);
boolean update(Application app);
Application findByAppAccount(String appAccount);
List<Application> findAll();
}

AppDaoImpl.java
Java代码

package com.pinche.statistic.dao.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataAccessException;
import org.springframework.stereotype.Repository;
import com.pinche.statistic.dao.AppDao;
import com.pinche.statistic.domain.Application;
import com.pinche.statistic.mapper.ApplicationsMapper;
@Repository
public class AppDaoImpl implements AppDao {
@Autowired
private ApplicationsMapper mapper;
@Override
public boolean add(Application app) {
try {
mapper.add(app);
return true;
} catch (DataAccessException e) {
e.printStackTrace();
}
return false;
}
@Override
public boolean delete(String appAccount) {
try {
mapper.delete(appAccount);
return true;
} catch (DataAccessException e) {
e.printStackTrace();
}
return false;
}
@Override
public boolean update(Application app) {
try {
mapper.update(app);
return true;
} catch (DataAccessException e) {
e.printStackTrace();
}
return false;
}
@Override
public Application findByAppAccount(String appAccount) {
try {
Application findByAppAccount = mapper.findByAppAccount(appAccount);
return findByAppAccount;
} catch (DataAccessException e) {
e.printStackTrace();
}
return null;
}
@Override
public List<Application> findAll() {
try {
return mapper.findAll();
} catch (DataAccessException e) {
e.printStackTrace();
}
return null;
}
}

自行设计的DAO层对象容器（在DAO对象很多时，如果在service层要调用对应的DAO还得手动注入，通过引用这个DAO层对象容器，可以实现在需要使用DAO时迅速找需要的DAO，省去了繁杂的手动注入，而且spring默认的bean都是单例的，无论在何处注入一个实体bean其实都是同一个。这样做更方便）：
Java代码

package com.pinche.statistic.dao;
import java.lang.reflect.Field;
import javax.annotation.PostConstruct;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
@Repository
public class BaseDAL {
private static final Logger logger = LoggerFactory.getLogger(BaseDAL.class);
@Autowired
private AppDao _appDao;
public static AppDao appDao;
@Autowired
private MetaDataDao _metaDataDao;
public static MetaDataDao metaDataDao;
@Autowired
private DDLManager _DDLManager;
public static DDLManager DDLManager;
@Autowired
private AnalyzeDao _analyzeDao;
public static AnalyzeDao analyzeDao;
@Autowired
private DialstatisticsDao _dialstatisticsDao;
public static DialstatisticsDao dialstatisticsDao;
@PostConstruct
public void init() {
long start = System.currentTimeMillis();
logger.debug("start init BaseDAL ...");
try {
Field[] fields = this.getClass().getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
String fieldname = fields.getName();
if (fieldname.startsWith("_")) {
String sfieldname = fieldname.substring(1);
Field sfield = this.getClass().getDeclaredField(sfieldname);
sfield.setAccessible(true);
sfield.set(this, fields.get(this));
}
}
logger.debug("init BaseDAL OVER, consume = {}ms",
System.currentTimeMillis() - start);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}

如果使用了以上的层管理容器，如果要在容器中添加一个DAO（例如：DemoDao），只需在这个容器中添加一个这样的声明：
Java代码

@Autowired

private DemoDao _demoDao;

public static DemoDao demoDao;

好了下面是service层定义的接口：
AppService.java
Java代码

package com.pinche.statistic.service;



import java.util.List;



import com.pinche.statistic.domain.Application;



/**

* @author JACKWANG

* @since Dec 23, 2013

*/

public interface AppService {



    Application find(String appAccount);



    boolean update(Application app);



    boolean setDisable(String appAccount);



    boolean setEnable(String appAccount);



    List<Application> findAll();



}

  AppServiceImpl.java : AppService的实现类：
Java代码

package com.pinche.statistic.service.impl;



import java.util.List;



import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.stereotype.Service;



import com.pinche.statistic.dao.BaseDAL;

import com.pinche.statistic.domain.Application;

import com.pinche.statistic.service.AppService;

import com.pinche.statistic.utils.SystemUtils;



/**

* @author JACKWANG

* @since Dec 23, 2013

*/

@Service

public class AppServiceImpl implements AppService {



    private static final Logger logger = LoggerFactory

            .getLogger(AppServiceImpl.class);



    @Override

    public Application find(String appAccount) {

        return BaseDAL.appDao.findByAppAccount(appAccount);

    }





    @Override

    public boolean update(Application app) {

        String appAccount = app.getAppAccount();

        if (appAccount == null && "".equals(appAccount)) {

            return true;

        }

        return BaseDAL.appDao.update(app);

    }



    @Override

    public boolean setDisable(String appAccount) {

        Application app = new Application();

        app.setAppAccount(appAccount);

        app.setIsDisable(Application.APP_DISABLE);

        return BaseDAL.appDao.update(app);

    }



    @Override

    public boolean setEnable(String appAccount) {

        Application app = new Application();

        app.setAppAccount(appAccount);

        app.setIsDisable(Application.APP_ENABLE);

        return BaseDAL.appDao.update(app);

    }



    @Override

    public List<Application> findAll() {

        return BaseDAL.appDao.findAll();

    }

}

哈哈，使用层对象管理容器是不是很方便。通过一个引用就能获得所有的DAO支持。所以我在service层也构建了一个service层对象管理容器BaseBLL:
BaseBLL.java:
Java代码

package com.pinche.statistic.service;



import java.lang.reflect.Field;



import javax.annotation.PostConstruct;



import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;



/**

* @author JACKWANG

* @since Dec 23, 2013

*/

@Service

public class BaseBLL {



    private static final Logger logger = LoggerFactory.getLogger(BaseBLL.class);



    @Autowired

    private AnalyzeService _analyzeService;

    public static AnalyzeService analyzeService;



    @Autowired

    private AppService _appService;

    public static AppService appService;



    @Autowired

    private MetaDataService _metaDataService;

    public static MetaDataService metaDataService;



    @PostConstruct

    public void init() {

        long start = System.currentTimeMillis();

        logger.debug("start init BaseBLL ...");

        try {



            Field[] fields = this.getClass().getDeclaredFields();



            for (int i = 0; i < fields.length; i++) {

                String fieldname = fields.getName();

                if (fieldname.startsWith("_")) {

                    String sfieldname = fieldname.substring(1);

                    Field sfield = this.getClass().getDeclaredField(sfieldname);

                    sfield.setAccessible(true);

                    sfield.set(this, fields.get(this));

                }

            }

            logger.debug("init BaseBLL OVER, consume = {}ms",

                    System.currentTimeMillis() - start);

        } catch (IllegalArgumentException e) {

            e.printStackTrace();

        } catch (NoSuchFieldException e) {

            e.printStackTrace();

        } catch (SecurityException e) {

            e.printStackTrace();

        } catch (IllegalAccessException e) {

            e.printStackTrace();

        }

    }



}

好了下面应该是controller层的编写了，但是由于笔者以上的代码只是摘录了系统中的部分，而在controller中涉及到其他的内容，如果直接摘录可能和以上的代码衔接不上。所以这里就不进行了controller层的具体介绍了。本系统controller层使用的是SpringMVC，开发效率一级赞。

账号		自动登录	找回密码
密码			立即注册

wirelessnetview好用的无线分析工具

亿图图示专家(EDraw Max) V7.9 中文破解版

zabbix3.4.1安装部署+微信推送信息+大屏显

Red Hat OpenShift I: Containers & Kubern

2025 年，C++ 还能“硬核”多久？

RH199 RHCSA Rapid Track

Red Hat RHCE 8 (EX294) Cert Guide

[经验分享] (转)Spring集成MyBatis进行项目开发（三）

浏览过的版块

扫码加入运维网微信交流群