Struts2+Mybatis+Spring整合增删改查实例

在我的博客首页有s2sh整合的例子，现在要做的工作就是将此工程中hibernate换成mybatis，并且使用比较流行的annotation注解来实现。首先肯定是要将hibernate的jar包全部干掉，然后加上mybatis的jar包及其与spring整合所需jar包，下面只贴主要改动的类及其配置文件：

一.mybatis配置文件mybatis-config.xml

>
<configuration>
    <typeAliases>
        <typeAlias alias="User" type="com.anxin.bean.User" />
        <typeAlias alias="Student" type="com.anxin.bean.Student" />
    typeAliases>
    <mappers>
        <mapper resource="com/anxin/orm/mapping/User.xml" />
        <mapper resource="com/anxin/orm/mapping/Student.xml" />
    mappers>
configuration>

二、bean的mapper文件

Student.xml

xml version="1.0" encoding="utf-8" ?>
>
<mapper namespace="Student">


        class="com.mchange.v2.c3p0.ComboPooledDataSource">


            ${driverClass}



            ${jdbcUrl}



            ${user}



            ${password}



            20



            2



            2



            20



        class="org.mybatis.spring.SqlSessionFactoryBean">

            value="classpath:mybatis-config.xml" />







        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">





四、泛型基类BaseDAOImpl.java
package com.anxin.dao.impl;

import java.io.Serializable;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;

import com.anxin.dao.BaseDAO;
import com.anxin.util.PageListData;

public class BaseDAOImpl extends
        SqlSessionDaoSupport implements BaseDAO {

    public static Logger logger = LoggerFactory.getLogger(BaseDAOImpl.class);
    @Autowired(required = true)
    @Resource(name = "sqlSessionFactory")
    public void setSuperSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
        super.setSqlSessionFactory(sqlSessionFactory);
    }
    // 保存
    public T save(T entity) {
        try {
            getSqlSessionTemplate().insert(
                    entity.getClass().getSimpleName() + ".save", entity);
            return entity;
        } catch (RuntimeException re) {
            logger.error("save " + entity.getClass().getName() + " failed :{}",
                    re);
            throw re;
        }
    }
    // 更新
    public void update(T entity) {
        try {
            this.getSqlSessionTemplate().update(
                    entity.getClass().getSimpleName() + ".update", entity);
        } catch (RuntimeException re) {
            logger.error("update " + entity.getClass().getName()
                    + " failed :{}", re);
            throw re;
        }
    }
    // 删除
    public void delete(T entity) {
        try {
            this.getSqlSessionTemplate().delete(
                    entity.getClass().getSimpleName() + ".delete", entity);
        } catch (RuntimeException re) {
            logger.error("delete " + entity.getClass().getName()
                    + " failed :{}", re);
            throw re;
        }
    }

    // 根据id删除某个对象
    public void delete(Class entityClass, PK id) {
        try {
            this.getSqlSessionTemplate().delete(
                    entityClass.getSimpleName() + ".deleteById", id);
        } catch (RuntimeException re) {
            logger.error("delete " + entityClass.getName() + "failed :{}", re);
            throw re;
        }
    }
    // 根据id加载某个对象
    public T findById(Class entityClass, PK id) {
        try {
            return (T) this.getSqlSessionTemplate().selectOne(
                    entityClass.getSimpleName() + ".findById", id);
        } catch (RuntimeException re) {
            logger.error("findById " + entityClass.getName() + "failed :{}",
                    re);
            throw re;
        }
    }

    // 查找所有的对象
    public List findAll(Class entityClass) {
        try {
            return this.getSqlSessionTemplate().selectList(
                    entityClass.getSimpleName() + ".findAll");
        } catch (RuntimeException re) {
            logger
                    .error("findAll " + entityClass.getName() + "failed :{}",
                            re);
            throw re;
        }
    }
    // 根据查询参数，当前页数，每页显示的数目得到分页列表
    public PageListData queryPage(Class entityClass, Map param,
            int currentPage, int pageSize) {
        try {
            return new PageListData((Integer)getSqlSessionTemplate()
                    .selectOne(entityClass.getSimpleName()+".getTotalCounts",param), pageSize, currentPage, this
                    .getSqlSessionTemplate().selectList(
                            entityClass.getSimpleName() + ".queryPage", param));
        } catch (RuntimeException re) {
            logger.error("findList " + entityClass.getName() + "failed :{}",
                    re);
            throw re;
        }
    }
}






StudentDAOImpl.java




package com.anxin.dao.impl;

import org.springframework.stereotype.Repository;

import com.anxin.bean.Student;
import com.anxin.dao.StudentDAO;

@Repository
public class StudentDAOImpl extends BaseDAOImpl implements StudentDAO {
}