Spring(一)之概括与架构

package cn.blog.mapper;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import cn.blog.entity.Post;
/*
 * 文章接口
 */
public interface PostMapper {
   
    /**
     * 根据文章ID显示文章
     */
    public Post selectByPostId(Integer postId);
    
    /**
     * 显示文章总数
     */
    public int selectPostCount();
    
    
    /**
     *分页显示
     */
    public List<Post> selectPostWherePage(HashMap<String,Object> map);
    
    
    /**
     * 根据用户ID显示该用户的所有文章
     */
    public List<Post> selectUserIdWherePage(Map<String,Object> map);
    
    
    /**
     *显示该用户ID下所有文章总数
     */
    public int selectUserIdWherePageCount(Integer userId);
    
    
    
    
}

package cn.blog.service;

import org.apache.ibatis.annotations.Param;

import cn.blog.entity.Post;
import cn.blog.utils.PageBean;

public interface PostService {

    
    /**
     * 根据文章ID显示文章
     */
    public Post selectByPostId(Integer postId);
    
    
    /**
     * 显示文章总数
     */
    public int selectPostCount();
    
    
    /**
     *分页显示
     */
    public PageBean<Post> selectPostWherePage(int currentPage);
    
    /**
     * 根据用户ID显示该用户的所有文章
     */
    public PageBean<Post> selectUserIdWherePage(int currentPate,int userId);
    

    /**
     *显示该用户ID下所有文章总数
     */
    public int selectUserIdWherePageCount(Integer userId);
    
     
}

package cn.blog.service.impl;


import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.blog.entity.Post;
import cn.blog.mapper.PostMapper;
import cn.blog.service.PostService;
import cn.blog.utils.PageBean;


@Service
public class PostServiceImpl implements PostService{

    @Autowired
    private PostMapper postMapper;
    
    @Override
    public Post selectByPostId(Integer postId) {
        // TODO Auto-generated method stub
        return postMapper.selectByPostId(postId);
    }

    @Override
    public int selectPostCount() {
        // TODO Auto-generated method stub
        return postMapper.selectPostCount();
    }

    @Override
    public PageBean<Post> selectPostWherePage(int currentPage) {
            HashMap<String,Object> map = new HashMap<String,Object>();
            PageBean<Post> pageBean = new PageBean<Post>();

            //封装当前页数
            pageBean.setCurrPage(currentPage);

            //每页显示的数据
            int pageSize=5;
            pageBean.setPageSize(pageSize);
            
            //封装总记录数
            int totalCount = postMapper.selectPostCount();
            pageBean.setTotalCount(totalCount);
            
            //封装总页数
            double tc = totalCount;
            Double num =Math.ceil(tc/pageSize);//向上取整
            pageBean.setTotalPage(num.intValue());

            map.put("start",(currentPage-1)*pageSize);
            map.put("size", pageSize);
            //封装每页显示的数据
            List<Post> lists = postMapper.selectPostWherePage(map);
            pageBean.setLists(lists);
            

            return pageBean;
    }



    @Override
    public int selectUserIdWherePageCount(Integer userId) {
        // TODO Auto-generated method stub
        return postMapper.selectUserIdWherePageCount(userId);
    }

    @Override
    public PageBean<Post> selectUserIdWherePage(int currentPage,int userId) {

        
        PageBean<Post> pageBean = new PageBean<Post>();

        Map<String,Object> paramMap = new HashMap<String,Object>();
        //封装当前页数

        pageBean.setCurrPage(currentPage);

        //每页显示的数据
        int pageSize=5;
        pageBean.setPageSize(pageSize);

        //封装总记录数
        int totalCount = postMapper.selectUserIdWherePageCount(userId);
        pageBean.setTotalCount(totalCount);

        //封装总页数
        double tc = totalCount;
        Double num =Math.ceil(tc/pageSize);//向上取整
        pageBean.setTotalPage(num.intValue());
        paramMap.put("start", (currentPage-1)*pageSize);
        paramMap.put("size", pageBean.getPageSize());
        paramMap.put("userId", userId);

        //封装每页显示的数据
        List<Post> lists = postMapper.selectUserIdWherePage(paramMap);
        
        pageBean.setLists(lists);
        

        return pageBean;
    }

}

<bean id="postMapper" class="com.blog.mapper.PostMapper">
</bean>

<bean id="postService" class="cn.blog.service.impl.PostServiceImpl">
<property name="postMapper" ref="postMapper"/>
</bean>

   <!-- 配置事务管理 -->
    <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 事务管理 属性 -->
    <tx:advice id="transactionAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" propagation="REQUIRED"/>
            <tx:method name="append*" propagation="REQUIRED"/>
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="modify*" propagation="REQUIRED"/>
            <tx:method name="edit*" propagation="REQUIRED"/>
            <tx:method name="insert*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="remove*" propagation="REQUIRED"/>
            <tx:method name="repair" propagation="REQUIRED"/>

            <tx:method name="get*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="find*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="load*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="search*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="datagrid*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="*" propagation="REQUIRED" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!-- 配置切面 -->
    <aop:config>
        <aop:pointcut id="transactionPointcut" expression="execution(* com.rms.service..*.*(..))"/>
        <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice"/>
    </aop:config>