核心pom.xml:
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.27</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.1</version> </dependency> </dependencies>
主要的:
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.27</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.1</version> </dependency> </dependencies>
目录结构:
mybatis-config.xml配置信息如下:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 配置mybatis运行环境 --> <environments default="development"> <environment id="development"> <!-- 使用JDBC的事务管理 --> <transactionManager type="JDBC" /> <dataSource type="POOLED"> <!-- MySQL数据库驱动 --> <property name="driver" value="com.mysql.jdbc.Driver" /> <!-- 连接数据库的URL --> <property name="url" value="jdbc:mysql://localhost:3306/mysql8?characterEncoding=utf8" /> <property name="username" value="root" /> <property name="password" value="123456" /> </dataSource> </environment> </environments> <!-- 将mapper文件加入到配置文件中 --> <mappers> <mapper resource="com/sunxl/dao/UserDao.xml"/> </mappers> </configuration>
mapper设置如下:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.sunxl.dao.UserDao"> <!-- 查询所有网站信息 --> <select id="findAll" resultType="com.sunxl.pojo.User"> select * from USERs </select> </mapper>
dao接口:
package com.sunxl.dao; import com.sunxl.pojo.User; import java.util.List; public interface UserDao { List<User> findAll(); }
pojo类:
package com.sunxl.pojo; public class User { Integer id; String name; Integer age; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } @Override public String toString() { return "Users{" + "id=" + id + ", name='" + name + '\'' + ", age=" + age + '}'; } }
测试连接类:
import com.sunxl.dao.UserDao; import com.sunxl.pojo.User; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import java.io.IOException; import java.io.InputStream; import java.util.List; public class MybatisTest { public static void main(String[] args) throws IOException { InputStream config = Resources.getResourceAsStream("mybatis-config.xml"); SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); SqlSessionFactory factory = builder.build(config); SqlSession ss = factory.openSession(); UserDao userdao = ss.getMapper(UserDao.class); List<User> users = userdao.findAll(); for (User user: users){ System.out.println(user); } ss.commit(); //4. 释放资源 ss.close(); config.close(); } }
执行结果:
原文地址:http://www.cnblogs.com/xiaobaibailongma/p/16929476.html
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