SpringBoot填坑系列---XML方式配置数据库
本次只是简单的运用SpringBoot搭建框架,对其原理并不做深入的探究
1.POM文件
- <?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.hxyz</groupId>
- <artifactId>media</artifactId>
- <version>0.0.1-SNAPSHOT</version>
- <packaging>jar</packaging>
- <name>media</name>
- <description>Demo project for Spring Boot</description>
- <parent>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-parent</artifactId>
- <version>1.4.0.RELEASE</version>
- <relativePath/> <!-- lookup parent from repository -->
- </parent>
- <properties>
- <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
- <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
- <java.version>1.8</java.version>
- <mybatis.version>3.2.2</mybatis.version>
- </properties>
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-web</artifactId>
- </dependency>
- <dependency>
- <groupId>mysql</groupId>
- <artifactId>mysql-connector-java</artifactId>
- </dependency>
- <!-- mybatis -->
- <dependency>
- <groupId>org.mybatis</groupId>
- <artifactId>mybatis</artifactId>
- <version>${mybatis.version}</version>
- </dependency>
- <dependency>
- <groupId>org.mybatis</groupId>
- <artifactId>mybatis-spring</artifactId>
- <version>1.2.0</version>
- </dependency>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.data</groupId>
- <artifactId>spring-data-commons</artifactId>
- </dependency>
- <!-- connection pool -->
- <dependency>
- <groupId>org.springframework</groupId>
- <artifactId>spring-jdbc</artifactId>
- </dependency>
- <dependency>
- <groupId>org.apache.tomcat</groupId>
- <artifactId>tomcat-jdbc</artifactId>
- </dependency>
- <dependency>
- <groupId>mysql</groupId>
- <artifactId>mysql-connector-java</artifactId>
- </dependency>
- <dependency>
- <groupId>com.fasterxml.jackson.core</groupId>
- <artifactId>jackson-databind</artifactId>
- <version>2.7.0</version>
- </dependency>
- <dependency>
- <groupId>net.sf.json-lib</groupId>
- <artifactId>json-lib</artifactId>
- <version>2.4</version>
- <classifier>jdk15</classifier>
- </dependency>
- <dependency>
- <groupId>com.fasterxml.jackson.module</groupId>
- <artifactId>jackson-module-jaxb-annotations</artifactId>
- <version>2.7.0</version>
- </dependency>
- <dependency>
- <groupId>net.sf.json-lib</groupId>
- <artifactId>json-lib</artifactId>
- <version>2.4</version>
- <classifier>jdk15</classifier>
- </dependency>
- <dependency>
- <groupId>dom4j</groupId>
- <artifactId>dom4j</artifactId>
- <version>1.1</version>
- </dependency>
- <dependency>
- <groupId>org.apache.commons</groupId>
- <artifactId>commons-lang3</artifactId>
- <version>3.1</version>
- </dependency>
- <dependency>
- <groupId>org.codehaus.jackson</groupId>
- <artifactId>jackson-mapper-asl</artifactId>
- <version>1.9.13</version>
- </dependency>
- <dependency>
- <groupId>org.codehaus.jackson</groupId>
- <artifactId>jackson-core-asl</artifactId>
- <version>1.9.13</version>
- </dependency>
- </dependencies>
- <build>
- <plugins>
- <plugin>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-maven-plugin</artifactId>
- </plugin>
- </plugins>
- </build>
- </project>
2.通过MyBatis-generate自动生成实体类和mapper
3.配置XML文件
在resource下面新建applicationContext.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xmlns:p="http://www.springframework.org/schema/p"
- xmlns:aop="http://www.springframework.org/schema/aop"
- xmlns:context="http://www.springframework.org/schema/context"
- xmlns:jee="http://www.springframework.org/schema/jee"
- xmlns:tx="http://www.springframework.org/schema/tx"
- xsi:schemaLocation="
- http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
- http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
- http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
- http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
- http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
- <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close">
- <!-- Connection Info -->
- <property name="driverClassName" value="${jdbc.driver}" />
- <property name="url" value="${jdbc.url}" />
- <property name="username" value="${jdbc.username}" />
- <property name="password" value="${jdbc.password}" />
- <!-- Connection Pooling Info -->
- <property name="maxActive" value="10" />
- <property name="maxIdle" value="50" />
- <property name="minIdle" value="0" />
- <property name="defaultAutoCommit" value="false" />
- </bean>
- <!-- MyBatis配置 -->
- <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
- <property name="dataSource" ref="dataSource" />
- <!-- 自动扫描entity目录, 省掉Configuration.xml里的手工配置 -->
- <property name="typeAliasesPackage" value="com.hxyz.media.entity" />
- <!-- 显式指定Mapper文件位置 -->
- <property name="mapperLocations" value="classpath:/mapper/*Mapper.xml" />
- </bean>
- <!-- 扫描basePackage下所有以@MyBatisRepository标识的 接口-->
- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
- <property name="basePackage" value="com.hxyz.media.mapper" />
- </bean>
- </beans>
在resource路径下新建application.properties
- server.port=8089
- jdbc.driver=com.mysql.jdbc.Driver
- jdbc.url=jdbc:mysql://localhost:3306/
- jdbc.username=jack
- jdbc.password=123456
至此,我们的xml文件已经配置好了,我们可以写一个简单的控制器来测试下数据库是否已经连通
4.测试是否连通
- public interface FactoryService {
- public List<FactoryEntity> findFactory();
- }
- @Service
- public class FactoryServiceImpl implements FactoryService{
- @Resource
- private FactoryEntityMapper factoryMaaper;
- @Override
- public List<FactoryEntity> findFactory() {
- FactoryEntityExample example=new FactoryEntityExample();
- Criteria createCriteria = example.createCriteria();
- List<FactoryEntity> selectByExample = factoryMaaper.selectByExample(example);
- return selectByExample;
- }
- }
- @RestController
- @RequestMapping(value="front/factory")
- public class FactoryController {
- @Resource
- private FactoryService factoryService;
- @RequestMapping(value="list")
- @ResponseBody
- public ResponseVo queryAll(){
- ResponseVo responseVo=new ResponseVo();
- List<FactoryEntity> factoryEntityList = factoryService.findFactory();
- responseVo.setData(factoryEntityList);
- return responseVo;
- }
- }
所以,我们猜一下,现在我请求下,数据会正常的返回么
我们现在请求下
http://localhost:8089/front/factory/list
返回的是
- Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.hxyz.media.mapper.FactoryEntityMapper] found for dependency [com.hxyz.media.mapper.FactoryEntityMapper]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@javax.annotation.Resource(shareable=true, lookup=, name=, description=, authenticationType=CONTAINER, type=class java.lang.Object, mappedName=)}
- at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1406) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1057) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1019) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:518) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:496) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:627) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:169) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:318) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
- ... 34 common frames omitted
没有找到FactoryEntityMapper,但是我们明明是在xml中配置了mapperScannerConfigue
这是因为springboot在启动后并不会主动的去读取xml文件,只会根据类文件间的依赖去加载spring的bean类,所以springboot并没有发现xml中的配置
我们可以在启动类中添加
- @ImportResource(locations = "classpath*:/applicationContext.xml")
完整的启动类如下
- @ImportResource(locations = "classpath*:/applicationContext.xml")
- @SpringBootApplication
- //@SpringBootApplication(exclude = { DataSourceAutoConfiguration.class})
- public class MediaApplication {
- public static void main(String[] args) {
- SpringApplication.run(MediaApplication.class, args);
- }
- }
这时我们再启动就可以返回数据了
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