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增加README.md 项目说明

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luoxiang
2019-01-07 23:21:42 +08:00
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spring/spring-mybatis-annotation/README.md
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@ -1,125 +1,48 @@
# spring 整合 mybatis（注解配置方式）
# spring 整合 mybatis（xml配置方式）
1、创建标准web maven工程，导入依赖
## 一、说明
#### 1.1 项目结构
![spring-mybatis](D:\spring-samples-for-all\pictures\spring-mybatis-annotation.png)
#### 1.2 项目依赖
除了spring相关依赖外，还需要导入数据库驱动和对应的mybatis依赖包
```xml
<?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.heibaiying</groupId>
<!--jdbc 相关依赖包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<spring-base-version>5.1.3.RELEASE</spring-base-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.4</version>
<scope>provided</scope>
</dependency>
<!--jdbc 相关依赖包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.13</version>
</dependency>
<!--单元测试相关依赖包-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring-base-version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.3.0</version>
</dependency>
<!--mybatis 依赖包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
</dependencies>
</project>
<version>${spring-base-version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.13</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.3.0</version>
</dependency>
<!--mybatis 依赖包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
```
2、新建 DispatcherServletInitializer.java继承自AbstractAnnotationConfigDispatcherServletInitializer,等价于我们在web.xml中配置的前端控制器
## 二、spring 整合 mybatis
```java
public class DispatcherServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
protected Class<?>[] getRootConfigClasses() {
return new Class[0];
}
protected Class<?>[] getServletConfigClasses() {
return new Class[]{ServletConfig.class};
}
protected String[] getServletMappings() {
return new String[]{"/"};
}
}
```
3、在resources文件夹下新建数据库配置文件mysql.properties、oracle.properties
#### 2.1 在resources文件夹下新建数据库配置文件jdbc.properties及其映射类
```properties
# mysql 数据库配置
@ -127,9 +50,7 @@ mysql.driverClassName=com.mysql.jdbc.Driver
mysql.url=jdbc:mysql://localhost:3306/mysql
mysql.username=root
mysql.password=root
```
```properties
# oracle 数据库配置
oracle.driverClassName=oracle.jdbc.driver.OracleDriver
oracle.url=jdbc:oracle:thin:@//IP地址:端口号/数据库实例名
@ -137,21 +58,7 @@ oracle.username=用户名
oracle.password=密码
```
4、在新建数据库配置映射类DataSourceConfig.java
```java
package com.heibaiying.config;
import lombok.Data;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
/**
* @author : heibaiying
* @description :
*/
@Configuration
@PropertySource(value = "classpath:mysql.properties")
@Data
@ -167,35 +74,18 @@ public class DataSourceConfig {
private String password;
}
```
5、新建ServletConfig.java，进行数据库相关配置
#### 2.2 配置数据源和mybatis会话工厂、定义事务管理器
```java
package com.heibaiying.config;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.io.IOException;
/**
* @author : heibaiying
*/
@Configuration
@EnableTransactionManagement // 开启声明式事务处理 等价于xml中<tx:annotation-driven/>
@ComponentScan(basePackages = {"com.heibaiying.*"})
public class ServletConfig implements WebMvcConfigurer {
public class DatabaseConfig {
/* @Autowired
* private DataSourceConfig sourceConfig;
@ -216,7 +106,6 @@ public class ServletConfig implements WebMvcConfigurer {
return dataSource;
}
/**
* 配置mybatis 会话工厂
*
@ -258,7 +147,7 @@ public class ServletConfig implements WebMvcConfigurer {
```
5、新建mybtais 配置文件 更多settings配置项可以参考[官方文档](http://www.mybatis.org/mybatis-3/zh/configuration.html)
#### 2.3 新建mybtais配置文件，按照需求配置额外参数， 更多settings配置项可以参考[官方文档](http://www.mybatis.org/mybatis-3/zh/configuration.html)
```xml
<?xml version="1.0" encoding="UTF-8" ?>
@ -281,7 +170,7 @@ public class ServletConfig implements WebMvcConfigurer {
```
5、新建查询接口及其对应的mapper文件
#### 2.4 新建查询接口及其对应的mapper文件
```java
public interface MysqlDao {
@ -328,30 +217,11 @@ public interface OracleDao {
</mapper>
```
6.新建测试类进行测试
#### 2.5 新建测试类进行测试
```java
package com.heibaiying.dao;
import com.heibaiying.bean.Relation;
import com.heibaiying.config.DataSourceConfig;
import com.heibaiying.config.DispatcherServletInitializer;
import com.heibaiying.config.ServletConfig;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
/**
* @author : heibaiying
* @description :
*/
@RunWith(SpringRunner.class)
@ContextConfiguration(classes = {DispatcherServletInitializer.class, ServletConfig.class})
@ContextConfiguration(classes = {DatabaseConfig.class})
public class MysqlDaoTest {
@Autowired
@ -370,27 +240,8 @@ public class MysqlDaoTest {
```
```java
package com.heibaiying.dao;
import com.heibaiying.bean.Flow;
import com.heibaiying.config.DataSourceConfig;
import com.heibaiying.config.DispatcherServletInitializer;
import com.heibaiying.config.ServletConfig;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.List;
/**
* @author : heibaiying
* @description :
*/
@RunWith(SpringRunner.class)
@ContextConfiguration(classes = {DispatcherServletInitializer.class, ServletConfig.class})
@ContextConfiguration(classes = {DatabaseConfig.class})
public class OracleDaoTest {
@Autowired
@ -406,5 +257,6 @@ public class OracleDaoTest {
}
}
}
```