【移动应用开发技术】Springboot+Mybatis中怎么实现typeAliasesPackage正则扫描

【移动应用开发技术】Springboot+Mybatis中怎么实现typeAliasesPackage正则扫描

本篇内容主要讲解“Springboot+Mybatis中怎么实现typeAliasesPackage正则扫描”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让在下来带大家学习“Springboot+Mybatis中怎么实现typeAliasesPackage正则扫描”吧!mybatis默认配置typeAliasesPackage是不支持正则扫描package的，因此需要手动继承org.mybatis.spring.SqlSessionFactoryBean，自己实现正则扫描，方法和传统的spring+mybatis没什么区别，不同的是一个需要继承类一个是使用的扫描实现。对于两个或多个扫描路径，例：perties配置Mybatis如下mybatis.typeAliasesPackage=.onethird.*.*.entity

mybatis.mapperLocations=classpath:mapper/*.xmlpackage

.onethird.nursinghome;

import

java.io.IOException;

import

java.util.ArrayList;

import

java.util.HashSet;

import

java.util.List;

import

java.util.Properties;

import

javax.sql.DataSource;

import

org.apache.ibatis.session.SqlSessionFactory;

import

org.mybatis.spring.SqlSessionFactoryBean;

import

org.mybatis.spring.annotation.MapperScan;

import

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

import

org.springframework.boot.SpringApplication;

import

org.springframework.context.annotation.Bean;

import

org.springframework.context.annotation.Configuration;

import

org.springframework.context.annotation.PropertySource;

import

org.springframework.core.env.Environment;

import

org.springframework.core.io.Resource;

import

org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import

org.springframework.core.io.support.ResourcePatternResolver;

import

org.springframework.core.type.classreading.CachingMetadataReaderFactory;

import

org.springframework.core.type.classreading.MetadataReader;

import

org.springframework.core.type.classreading.MetadataReaderFactory;

import

org.springframework.util.ClassUtils;

import

com.Application;

/**

*

*

@Title:

MyBatisConfig.java

*

*

@Package

*

@Description:

mybtis实现正则扫描java

bean包

*

*

@author

*

@date

*

@version

V1.0

*/

@Configuration

@PropertySource("classpath:perties")

public

class

MyBatisConfig

{

@Autowired

private

Environment

env;

static

final

String

DEFAULT_RESOURCE_PATTERN

=

"**/*.class";

public

static

String

setTypeAliasesPackage(String

typeAliasesPackage)

{

ResourcePatternResolver

resolver

=

(ResourcePatternResolver)

new

PathMatchingResourcePatternResolver();

MetadataReaderFactory

metadataReaderFactory

=

new

CachingMetadataReaderFactory(

resolver);

typeAliasesPackage

=

ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX

+

ClassUtils.convertClassNameToResourcePath(typeAliasesPackage)

+

"/"

+

DEFAULT_RESOURCE_PATTERN;

try

{

List<String>

result

=

new

ArrayList<String>();

Resource[]

resources

=

resolver.getResources(typeAliasesPackage);

if

(resources

!=

null

&&

resources.length

>

0)

{

MetadataReader

metadataReader

=

null;

for

(Resource

resource

:

resources)

{

if

(resource.isReadable())

{

metadataReader

=

metadataReaderFactory

.getMetadataReader(resource);

try

{

result.add(Class

.forName(metadataReader.getClassMetadata().getClassName())

.getPackage().getName());

}

catch

(ClassNotFoundException

e)

{

e.printStackTrace();

}

}

}

}

if

(result.size()

>

0)

{

HashSet<String>

h

=

new

HashSet<String>(result);

result.clear();

result.addAll(h);

typeAliasesPackage

=

String.join(","

,(String[])

result.toArray(new

String[0]));

}

else

{

throw

new

RuntimeException(

"mybatis

typeAliasesPackage

路径扫描错误,

参数typeAliasesPackage:"

+

typeAliasesPackage

+

"未找到任何包");

}

}

catch

(IOException

e)

{

e.printStackTrace();

}

return

typeAliasesPackage;

}

@Bean

public

SqlSessionFactory

sqlSessionFactory(DataSource

dataSource)

throws

Exception

{

System.out.println(">>>>>>>>>>>配置[typeAliasesPackage,mapperLocations]START>>>>>>>>>>>>>>");

Properties

props

=

new

Properties();

String

typeAliasesPackage

=

env

.getProperty("mybatis.typeAliasesPackage");

String

mapperLocations

=

env.getProperty("mybatis.mapperLocations");

typeAliasesPackage=setTypeAliasesPackage(typeAliasesPackage);

final

SqlSessionFactoryBean

sessionFactory

=

new

SqlSessionFactoryBean();

sessionFactory.setDataSource(dataSource);

sessionFactory.setTypeAliasesPackage(typeAliasesPackage);

sessionFactory.setMapperLocations(new

PathMatchingResourcePatternResolver().getResources(mapperLocations));

System.out.println(">>>>>>>>>>>配置[typeAliasesPackage,mapperLocations]END>>>>>>>>>>>>>>");

return

sessionFactory.getObject();

}

public

static

void

main(String[]

args)

throws

Exception

{

setTypeAliasesPackage(".onethird.*.*.entity");

}

}Mybatis自定义扫描通配符typeAliasesPackagetypeAliasesPackage默认只能扫描某一个路径下，或以逗号等分割的几个路径下的内容，不支持通配符和正则，采用重写的方式解决package

mon;

import

com.xxxx.xxx.util.LogUtil;

import

mons.lang3.StringUtils;

import

org.mybatis.spring.SqlSessionFactoryBean;

import

org.slf4j.Logger;

import

org.springframework.core.io.Resource;

import

org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import

org.springframework.core.io.support.ResourcePatternResolver;

import

org.springframework.core.type.classreading.CachingMetadataReaderFactory;

import

org.springframework.core.type.classreading.MetadataReader;

import

org.springframework.core.type.classreading.MetadataReaderFactory;

import

org.springframework.util.ClassUtils;

import

java.io.IOException;

import

java.util.ArrayList;

import

java.util.List;

/**

*

Created

by

Administrator

on

2015/10/6.

*/

public

class

PackagesSqlSessionFactoryBean

extends

SqlSessionFactoryBean

{

static

final

String

DEFAULT_RESOURCE_PATTERN

=

"**/*.class";

private

static

Logger

logger

=

LogUtil.get();

@Override

public

void

setTypeAliasesPackage(String

typeAliasesPackage)

{

ResourcePatternResolver

resolver

=

(ResourcePatternResolver)

new

PathMatchingResourcePatternResolver();

MetadataReaderFactory

metadataReaderFactory

=

new

CachingMetadataReaderFactory(resolver);

typeAliasesPackage

=

ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX

+

ClassUtils.convertClassNameToResourcePath(typeAliasesPackage)

+

"/"

+

DEFAULT_RESOURCE_PATTERN;

//将加载多个绝对匹配的所有Resource

//将首先通过ClassLoader.getResource("META-INF")加载非模式路径部分

//然后进行遍历模式匹配

try

{

List<String>

result

=

new

ArrayList<String>();

Resource[]

resources

=

resolver.getResources(typeAliasesPackage);

if(resources

!=

null

&&

resources.length

>

0){

MetadataReader

metadataReader

=

null;

for(Resource

resource

:

resources){

if(resource.isReadable()){

metadataReader

=

metadataReaderFactory.getMetadataReader(resource);

try

{

result.add(Class.forName(metadataReader.getClassMetadata().getClassName()).getPackage().getName());

}

catch

(ClassNotFoundException

e)

{

e.printStackTrace();

}

}

}

}

if(result.size()

>

0)

{

super.setTypeAliasesPackage(StringUtils.join(result.toArray(),

","));

}else{

logger.warn("参数typeAliasesPackage:"+typeAliasesPackage+"，未找到任何包");

}