使用Mybatis-Plus时的SqlSessionFactory的问题

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	前些日子工作中出现一个问题,项目中使用了MybatisPlus,然后出现了一个问题,Druid的其他的配置都可以正常使用,但是配置的SqlSessionFactory这个bean不能被加载,我在这个bean中加载的mybatis-config.xml文件也不能被加载,因为代码里使用了拦截器进行数据库的自动分页,找到问题后在这里mark一下。
	其实这里不能加载的原因是因为MybatisPlus中自定义了MybatisSqlSessionFactoryBean这个类,而这个类是实现了接口FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent>,而在mybatis中有一个类也实现了这些接口,SqlSessionFactoryBean,所以在mybatisplus的配置文件中配置SqlSessionFactoryBean时需要换成mybatisplus中自定义的这个类MyBatisSqlSessionFactoryBean,并在类中加载对应的mybatis-config.xml文件。
	贴一下这两个类的源码,看一眼就明白了。
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
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package org.mybatis.spring;

import java.io.IOException;
import java.sql.SQLException;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.ibatis.builder.xml.XMLConfigBuilder;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.cache.Cache;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.io.VFS;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.type.TypeHandler;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;

public class SqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent> {
    private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);
    private Resource configLocation;
    private Configuration configuration;
    private Resource[] mapperLocations;
    private DataSource dataSource;
    private TransactionFactory transactionFactory;
    private Properties configurationProperties;
    private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
    private SqlSessionFactory sqlSessionFactory;
    private String environment = SqlSessionFactoryBean.class.getSimpleName();
    private boolean failFast;
    private Interceptor[] plugins;
    private TypeHandler<?>[] typeHandlers;
    private String typeHandlersPackage;
    private Class<?>[] typeAliases;
    private String typeAliasesPackage;
    private Class<?> typeAliasesSuperType;
    private DatabaseIdProvider databaseIdProvider;
    private Class<? extends VFS> vfs;
    private Cache cache;
    private ObjectFactory objectFactory;
    private ObjectWrapperFactory objectWrapperFactory;

    public SqlSessionFactoryBean() {
    }

     。。。。。。
}

还 有MybatisSqlSessionFactoryBean的:

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//

package com.baomidou.mybatisplus.spring;

import com.baomidou.mybatisplus.MybatisConfiguration;
import com.baomidou.mybatisplus.MybatisXMLConfigBuilder;
import com.baomidou.mybatisplus.entity.GlobalConfiguration;
import com.baomidou.mybatisplus.enums.IEnum;
import com.baomidou.mybatisplus.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.handlers.EnumTypeHandler;
import com.baomidou.mybatisplus.mapper.SqlRunner;
import com.baomidou.mybatisplus.toolkit.GlobalConfigUtils;
import com.baomidou.mybatisplus.toolkit.PackageHelper;
import java.sql.SQLException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Properties;
import java.util.Set;
import javax.sql.DataSource;
import org.apache.ibatis.builder.xml.XMLMapperBuilder;
import org.apache.ibatis.cache.Cache;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.io.VFS;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.type.EnumOrdinalTypeHandler;
import org.apache.ibatis.type.TypeHandler;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.transaction.SpringManagedTransactionFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;

public class MybatisSqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent> {
    private static final Log LOGGER = LogFactory.getLog(SqlSessionFactoryBean.class);
    private Resource configLocation;
    private Configuration configuration;
    private Resource[] mapperLocations;
    private DataSource dataSource;
    private TransactionFactory transactionFactory;
    private Properties configurationProperties;
    private SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
    private SqlSessionFactory sqlSessionFactory;
    private String environment = MybatisSqlSessionFactoryBean.class.getSimpleName();
    private boolean failFast;
    private Interceptor[] plugins;
    private TypeHandler<?>[] typeHandlers;
    private String typeHandlersPackage;
    private Class<?>[] typeAliases;
    private String typeAliasesPackage;
    private String typeEnumsPackage;
    private Class<?> typeAliasesSuperType;
    private DatabaseIdProvider databaseIdProvider;
    private Class<? extends VFS> vfs;
    private Cache cache;
    private ObjectFactory objectFactory;
    private ObjectWrapperFactory objectWrapperFactory;
    private GlobalConfiguration globalConfig = GlobalConfigUtils.defaults();

    public MybatisSqlSessionFactoryBean() {
    }

     。。。。。。
}

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转载自blog.csdn.net/canyun9798/article/details/83243416