1. 导入依赖的jar包
springboot项目整合mybatis之前首先要导入依赖的jar包,配置pom.xml文件如下:
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<?xml version= "1.0" encoding= "utf-8" ?> <project xmlns= "http://maven.apache.org/pom/4.0.0" xmlns:xsi= "http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation= "http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > <modelversion> 4.0 . 0 </modelversion> <groupid>com.u</groupid> <artifactid>springboot-mybatis</artifactid> <version> 1.0 -snapshot</version> <parent> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-parent</artifactid> <version> 1.3 . 0 .release</version> </parent> <properties> <start- class >com.us.application</start- class > <mybatis.version> 3.2 . 7 </mybatis.version> <mybatis-spring.version> 1.2 . 2 </mybatis-spring.version> <maven.compiler.target> 1.8 </maven.compiler.target> <maven.compiler.source> 1.8 </maven.compiler.source> </properties> <dependencies> <!--springboot--> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-web</artifactid> </dependency> <!--db--> <dependency> <groupid>mysql</groupid> <artifactid>mysql-connector-java</artifactid> <version> 6.0 . 5 </version> </dependency> <dependency> <groupid>com.mchange</groupid> <artifactid>c3p0</artifactid> <version> 0.9 . 5.2 </version> <exclusions> <exclusion> <groupid>commons-logging</groupid> <artifactid>commons-logging</artifactid> </exclusion> </exclusions> </dependency> <!--mybatis--> <dependency> <groupid>org.springframework</groupid> <artifactid>spring-jdbc</artifactid> </dependency> <dependency> <groupid>org.mybatis</groupid> <artifactid>mybatis</artifactid> <version>${mybatis.version}</version> </dependency> <dependency> <groupid>org.mybatis</groupid> <artifactid>mybatis-spring</artifactid> <version>${mybatis-spring.version}</version> </dependency> <!--util--> <dependency> <groupid>org.apache.commons</groupid> <artifactid>commons-lang3</artifactid> <version> 3.4 </version> </dependency> </dependencies> </project> |
2. 配置数据源
pom.xml配置完毕后需要配置数据源了。新建dbconfig类配置数据源,代码如下:
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import org.springframework.beans.factory.annotation.autowired; import org.springframework.context.annotation.bean; import org.springframework.context.annotation.configuration; import org.springframework.core.env.environment; import com.alibaba.druid.pool.druiddatasource; import com.google.common.base.preconditions; @configuration public class dbconfig { @autowired private environment env; @bean (name = "datasource" ) public druiddatasource datasource() { final string url = preconditions.checknotnull(env.getproperty( "ms.db.url" )); final string username = preconditions.checknotnull(env.getproperty( "ms.db.username" )); final string password = env.getproperty( "ms.db.password" ); final int maxactive = integer.parseint(env.getproperty( "ms.db.maxactive" , "200" )); druiddatasource datasource = new druiddatasource(); datasource.seturl(url); datasource.setusername(username); datasource.setpassword(password); datasource.setmaxactive(maxactive); return datasource; } } |
3. 添加数据库连接信息
在配置文件application.properties中添加数据库连接信息如下:
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ms.db.url=jdbc:mysql: //localhost:3306/dev?prepstmtcachesize=517&cacheprepstmts=true&autoreconnect=true&characterencoding=utf-8&allowmultiqueries=true ms.db.username=root ms.db.password=admin ms.db.maxactive= 500 |
4. 配置mybatis的sqlsessionfactorybean
数据源配置完以后要配置mybatis的sqlsessionfactorybean进行扫描mapper,新建mybatisconfig类代码如下(classpath*:mapper/*.xml为mapper.xml文件路径):
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import javax.sql.datasource; import org.mybatis.spring.sqlsessionfactorybean; import org.springframework.beans.factory.annotation.autowired; import org.springframework.context.applicationcontext; import org.springframework.context.annotation.bean; import org.springframework.context.annotation.configuration; @configuration public class mybatisconfig { @autowired private datasource datasource; @bean (name = "sqlsessionfactory" ) public sqlsessionfactorybean sqlsessionfactory(applicationcontext applicationcontext) throws exception { sqlsessionfactorybean sessionfactory = new sqlsessionfactorybean(); sessionfactory.setdatasource(datasource); sessionfactory.setmapperlocations(applicationcontext.getresources( "classpath*:mapper/*.xml" )); return sessionfactory; } } |
5. 配置mapperscannerconfigurer扫描dao层
然后配置mapperscannerconfigurer扫描dao层,新建类mybatisscannerconfig代码如下(注意与mybatisconfig不要写在一个类里):
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import org.mybatis.spring.mapper.mapperscannerconfigurer; import org.springframework.context.annotation.bean; import org.springframework.context.annotation.configuration; @configuration public class mybatisscannerconfig { @bean public mapperscannerconfigurer mapperscannerconfigurer() { mapperscannerconfigurer mapperscannerconfigurer = new mapperscannerconfigurer(); mapperscannerconfigurer.setbasepackage( "com.example.*.dao" ); mapperscannerconfigurer.setsqlsessionfactorybeanname( "sqlsessionfactory" ); return mapperscannerconfigurer; } } |
6. 开启数据库事务(必须)代码如下
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import javax.sql.datasource; import org.springframework.beans.factory.annotation.autowired; import org.springframework.context.annotation.bean; import org.springframework.context.annotation.configuration; import org.springframework.jdbc.datasource.datasourcetransactionmanager; import org.springframework.transaction.platformtransactionmanager; import org.springframework.transaction.annotation.transactionmanagementconfigurer; @configuration public class transactionconfig implements transactionmanagementconfigurer{ @autowired private datasource datasource; @bean (name = "transactionmanager" ) @override public platformtransactionmanager annotationdriventransactionmanager() { return new datasourcetransactionmanager(datasource); } } |
7. 实战
配置大致就是如此,然后就是新建java bean(省略,文章底部有源码地址)
新建mapper.xml文件(省略,文章底部有源码地址,关于mapper.xml 文件编写的疑问可以看我以前的springmvc+mybatis 系列文章)
新建dao层。代码如下:
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import java.util.list; import java.util.map; import com.example.base.model.user; import com.example.config.mybatisrepository; public interface userdao { public list<user> getlist(map<string,object> map); } |
service层要在实现类上添加@service注解,代码如下:
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import java.util.map; import org.springframework.beans.factory.annotation.autowired; import org.springframework.stereotype.service; import com.example.base.dao.userdao; import com.example.base.service.userservice; @service public class userserviceimpl implements userservice { @autowired private userdao userdao; public object getlist(map<string, object> map) { return userdao.getlist(map); } } |
controller层也要加@controller注解代码如下:
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import javax.servlet.http.httpservletrequest; import java.util.map; import org.springframework.beans.factory.annotation.autowired; import org.springframework.http.httpstatus; import org.springframework.http.responseentity; import org.springframework.stereotype.controller; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestmethod; import org.springframework.web.bind.annotation.responsebody; import com.example.base.service.userservice; import com.example.base.util.commonutil; import com.example.demo.serviceemail; @controller @requestmapping (value = "/users" ) public class usercontroller { @autowired private userservice userservice; @autowired private serviceemail serviceemail; /*** * api :localhost:8099/users?id=99 localhost:8099/users * * @param request * @return */ @requestmapping (method = requestmethod.get, produces = "application/json;charset=utf-8" ) @responsebody public responseentity<?> list(httpservletrequest request) { map<string, object> map = commonutil.getparametermap(request); return new responseentity<object>(userservice.getlist(map), httpstatus.ok); } } |
然后在启动入口类中扫描定义的这些配置累(配置包名可却省只写部分包名)如下:
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import java.util.arrays; import org.springframework.boot.springapplication; import org.springframework.boot.autoconfigure.springbootapplication; import org.springframework.boot.builder.springapplicationbuilder; import org.springframework.boot.context.web.springbootservletinitializer; import org.springframework.context.applicationcontext; import org.springframework.context.annotation.componentscan; import org.springframework.scheduling.annotation.enablescheduling; @componentscan (basepackages = "com.example" ) @springbootapplication public class application extends springbootservletinitializer{ @override protected springapplicationbuilder configure(springapplicationbuilder application) { return application.sources(application. class ); } public static void main(string[] args) throws exception { applicationcontext ctx = springapplication.run(application. class , args); string[] beannames = ctx.getbeandefinitionnames(); arrays.sort(beannames); for (string beanname : beannames) { system.out.println(beanname); } } } |
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,谢谢大家对服务器之家的支持。如果你想了解更多相关内容请查看下面相关链接
原文链接:https://blog.csdn.net/u012373815/article/details/52050308