maven下整合mybatis

mybatis依赖：

<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.mybatis</groupId>
<artifactId>com.mybatis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.4</version>
</dependency>

</dependencies>
<build/>
<packaging>war</packaging>
</project>

jdbc.properties配置如下：

driver=com.mysql.jdbc.Driver
url=jdbc\:mysql\://localhost\:3306/user?serverTimezone\=UTC
username=root
password=

mybatis-config.xml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>

<properties resource="jdbc.properties"></properties>
<typeAliases>
<typeAlias alias="user" type="entity.user"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="dao/usermapper.xml"/>
</mappers>
</configuration>

usermapper.xml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="dao.userdao">
<select id="findall" resultType="user">
SELECT * FROM user
</select>
</mapper>

userdao.java DAO层代码：

package dao;
import java.util.List;
import entity.user;
public interface userdao {
public List<user> findall();
}

实体类user.java :

package entity;

public class user{
@Override
public String toString() {
return "user [id=" + id + ", username=" + username + ", password="
+ password + "]";
}

private int id;
private String username;
private String password;

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}
}

接下来测试代码：

package test;

import java.io.IOException;
import java.util.List;

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 dao.userdao;

import entity.user;

public class test {

public static void main(String[] args) {

SqlSessionFactory s;
try {
s = new SqlSessionFactoryBuilder().build(Resources.getResourceAsStream("mybatis-config.xml"));
SqlSession ss=s.openSession();
userdao dao = ss.getMapper(userdao.class);
List<user> u= dao.findall();
for (user us : u) {
System.out.println(us.toString());
}
} catch (IOException e) {
e.printStackTrace();
}

}
}

运行结果：

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