程式碼簡介

程式碼片段

import org.mybatis.spring.support.SqlSessionDaoSupport;public abstract class BaseDao<T> extends SqlSessionDaoSupport { protected <S> S getMapper(Class<S> clazz) {  return getSqlSession().getMapper(clazz); }}

程式碼片段

1.2.0版本/* *    Copyright 2010-2013 The MyBatis Team * *    Licensed under the Apache License, Version 2.0 (the "License"); *    you may not use this file except in compliance with the License. *    You may obtain a copy of the License at * *       http://www.apache.org/licenses/LICENSE-2.0 * *    Unless required by applicable law or agreed to in writing, software *    distributed under the License is distributed on an "AS IS" BASIS, *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *    See the License for the specific language governing permissions and *    limitations under the License. */package org.mybatis.spring.support;import static org.springframework.util.Assert.notNull;import org.apache.ibatis.session.SqlSession;import org.apache.ibatis.session.SqlSessionFactory;import org.mybatis.spring.SqlSessionTemplate;import org.springframework.dao.support.DaoSupport;/** * Convenient super class for MyBatis SqlSession data access objects. * It gives you access to the template which can then be used to execute SQL methods. * <p> * This class needs a SqlSessionTemplate or a SqlSessionFactory. * If both are set the SqlSessionFactory will be ignored. * <p> * {code Autowired} was removed from setSqlSessionTemplate and setSqlSessionFactory * in version 1.2.0. * * @see #setSqlSessionFactory * @see #setSqlSessionTemplate * @see SqlSessionTemplate * @version $Id$ */public abstract class SqlSessionDaoSupport extends DaoSupport {  private SqlSession sqlSession;  private boolean externalSqlSession;  public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {    if (!this.externalSqlSession) {      this.sqlSession = new SqlSessionTemplate(sqlSessionFactory);    }  }  public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {    this.sqlSession = sqlSessionTemplate;    this.externalSqlSession = true;  }  /**   * Users should use this method to get a SqlSession to call its statement methods   * This is SqlSession is managed by spring. Users should not commit/rollback/close it   * because it will be automatically done.   *   * @return Spring managed thread safe SqlSession   */  public SqlSession getSqlSession() {    return this.sqlSession;  }  /**   * {@inheritDoc}   */  protected void checkDaoConfig() {    notNull(this.sqlSession, "Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required");  }}1.1.1 版本/* *    Copyright 2010 The myBatis Team * *    Licensed under the Apache License, Version 2.0 (the "License"); *    you may not use this file except in compliance with the License. *    You may obtain a copy of the License at * *       http://www.apache.org/licenses/LICENSE-2.0 * *    Unless required by applicable law or agreed to in writing, software *    distributed under the License is distributed on an "AS IS" BASIS, *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *    See the License for the specific language governing permissions and *    limitations under the License. */package org.mybatis.spring.support;import org.apache.ibatis.session.SqlSession;import org.apache.ibatis.session.SqlSessionFactory;import org.mybatis.spring.SqlSessionTemplate;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.dao.support.DaoSupport;import org.springframework.util.Assert;/** * Convenient super class for MyBatis SqlSession data access objects. * It gives you access to the template which can then be used to execute SQL methods. * <p> * This class needs a SqlSessionTemplate or a SqlSessionFactory. * If both are set the SqlSessionFactory will be ignored. * * @see #setSqlSessionFactory * @see #setSqlSessionTemplate * @see SqlSessionTemplate * @version $Id: SqlSessionDaoSupport.java 3266 2010-11-22 06:56:51Z simone.tripodi $ */public abstract class SqlSessionDaoSupport extends DaoSupport {    private SqlSession sqlSession;    private boolean externalSqlSession;    @Autowired(required = false)    public final void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {        if (!this.externalSqlSession) {            this.sqlSession = new SqlSessionTemplate(sqlSessionFactory);        }    }    @Autowired(required = false)    public final void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {        this.sqlSession = sqlSessionTemplate;        this.externalSqlSession = true;    }    /**     * Users should use this method to get a SqlSession to call its statement methods     * This is SqlSession is managed by spring. Users should not commit/rollback/close it     * because it will be automatically done.     *      * @return Spring managed thread safe SqlSession      */    public final SqlSession getSqlSession() {        return this.sqlSession;    }    /**     * {@inheritDoc}     */    protected void checkDaoConfig() {        Assert.notNull(this.sqlSession, "Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required");    }}

程式碼片段

配置檔案跟我 貼出來的配置檔案一樣，不需要做改動，只需要在baseDao中注入sqlSessionFactory 或者 sqlSessionTemplate即可，程式碼如下：BaseDao.javaimport org.mybatis.spring.SqlSessionTemplate;import org.mybatis.spring.support.SqlSessionDaoSupport;import org.springframework.beans.factory.annotation.Autowired;public abstract class BaseDao<T> extends SqlSessionDaoSupport { @Autowired public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {  super.setSqlSessionTemplate(sqlSessionTemplate); } protected <S> S getMapper(Class<S> clazz) {  return getSqlSession().getMapper(clazz); }}