1. 導入依賴的jar包
springboot項目整合mybatis之前首先要導入依賴的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. 配置數據源
pom.xml配置完畢后需要配置數據源了。新建dbconfig類配置數據源，代碼如下：
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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;@configurationpublic 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. 添加數據庫連接信息
在配置文件application.properties中添加數據庫連接信息如下：
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ms.db.url=jdbc:mysql://localhost:3306/dev?prepstmtcachesize=517&cacheprepstmts=true&autoreconnect=true&characterencoding=utf-8&allowmultiqueries=truems.db.username=rootms.db.password=adminms.db.maxactive=500 |
4. 配置mybatis的sqlsessionfactorybean
數據源配置完以后要配置mybatis的sqlsessionfactorybean進行掃描mapper，新建mybatisconfig類代碼如下（classpath*:mapper/*.xml為mapper.xml文件路徑）：
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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;@configurationpublic 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掃描dao層
然后配置mapperscannerconfigurer掃描dao層，新建類mybatisscannerconfig代碼如下（注意與mybatisconfig不要寫在一個類里）：
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import org.mybatis.spring.mapper.mapperscannerconfigurer;import org.springframework.context.annotation.bean;import org.springframework.context.annotation.configuration;@configurationpublic class mybatisscannerconfig { @bean public mapperscannerconfigurer mapperscannerconfigurer() { mapperscannerconfigurer mapperscannerconfigurer = new mapperscannerconfigurer(); mapperscannerconfigurer.setbasepackage("com.example.*.dao"); mapperscannerconfigurer.setsqlsessionfactorybeanname("sqlsessionfactory"); return mapperscannerconfigurer; }} |
6. 開啟數據庫事務（必須）代碼如下
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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;@configurationpublic class transactionconfig implements transactionmanagementconfigurer{ @autowired private datasource datasource; @bean(name = "transactionmanager") @override public platformtransactionmanager annotationdriventransactionmanager() { return new datasourcetransactionmanager(datasource); }} |
7. 實戰
配置大致就是如此，然后就是新建java bean（省略，文章底部有源碼地址）
新建mapper.xml文件（省略，文章底部有源碼地址，關于mapper.xml 文件編寫的疑問可以看我以前的springmvc＋mybatis 系列文章）
新建dao層。代碼如下：
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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層要在實現類上添加@service注解，代碼如下：
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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;@servicepublic class userserviceimpl implements userservice { @autowired private userdao userdao; public object getlist(map<string, object> map) { return userdao.getlist(map); }} |
controller層也要加@controller注解代碼如下：
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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); } } |
然后在啟動入口類中掃描定義的這些配置累（配置包名可卻省只寫部分包名）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")@springbootapplicationpublic 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); } }} |
總結
以上就是這篇文章的全部內容了，希望本文的內容對大家的學習或者工作具有一定的參考學習價值，謝謝大家對服務器之家的支持。如果你想了解更多相關內容請查看下面相關鏈接
原文鏈接：https://blog.csdn.net/u012373815/article/details/52050308
