mybatis、spring、mysql、maven实现简单增删查改

之前写过的mybatis博客作为学习mybatis、spring还是不太合适。

现在找到一个不错的例子，首先将这个完整的mybatis增删查改例子在本地上实现出来，然后再进行学习。

项目结构与运行结果图:

pom文件

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.maven</groupId>
  <artifactId>mybatisCRUD</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>mybatisCRUD Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>

        <!-- JUnit testing framework -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <!-- Spring framework -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>3.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>3.2.6.RELEASE</version>
        </dependency>

        <!-- Spring AOP dependency -->
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
            <version>2.2</version>
        </dependency>

        <!-- MySQL database driver -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.0.5</version>
        </dependency>

        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>

        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
           </dependency>

        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>

        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.1</version>
        </dependency>

        <dependency>
            <groupId>antlr</groupId>
            <artifactId>antlr</artifactId>
            <version>2.7.7</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.3</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.1</version>
        </dependency>

        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.7.4</version>
        </dependency>

    </dependencies>
  <build>
    <finalName>mybatisCRUD</finalName>
  </build>
</project>

代码如下：

User.java

package com.mybatis;

public class User {
    private int userId;
    private String userName;
    private String password;
    private String comment;
    public int getUserId() {
        return userId;
    }
    public void setUserId(int userId) {
        this.userId = userId;
    }
    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;
    }
    public String getComment() {
        return comment;
    }
    public void setComment(String comment) {
        this.comment = comment;
    }
}

UserDao.java

package com.mybatis;

import java.util.List;

public interface UserDao {
    public int insert(User user);

    public int update(User user);

    public int delete(String userName);

    public List<User> selectAll();

    public int countAll();

    public User findByUserName(String userName);
}

MyBatis-Configuration.xml

<?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>
    <mappers>
        <mapper resource="com/mybatis/UserDaoMapper.xml"/>
    </mappers>
</configuration>

UserDaoMapper.xml

<?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.mybatis.UserDao">
    <select id="countAll" resultType="int">
        select count(*) c from user;
    </select>

    <select id="selectAll" resultType="com.mybatis.User">
        select * from user order by userName asc
    </select>

    <insert id="insert" parameterType="com.mybatis.User">
        insert into user(userName,password,comment) values(#{userName},#{password},#{comment})
    </insert>

    <update id="update" parameterType="com.mybatis.User">
        update user set userName=#{userName},password=#{password},comment=#{comment} where userName=#{userName}
    </update>

    <delete id="delete" parameterType="int">
        delete from user where userName=#{userName}
    </delete>

    <select id="findByUserName" parameterType="String" resultType="com.mybatis.User">
        select * from user where userName=#{userName}
    </select>
</mapper>

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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/hlp?useUnicode=true&amp;characterEncoding=UTF-8"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
        <property name="maxActive" value="100"></property>
        <property name="maxIdle" value="30"></property>
        <property name="maxWait" value="500"></property>
        <property name="defaultAutoCommit" value="true"></property>
    </bean>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="configLocation" value="com/mybatis/MyBatis-Configuration.xml"></property>
        <property name="dataSource" ref="dataSource" />
    </bean>

    <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="mapperInterface" value="com.mybatis.UserDao"></property>
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
    </bean>

</beans>

Test.java

package com.mybatis;

import org.springframework.context.ApplicationContext;

import  com.mybatis.User;

import java.io.Reader;
import java.util.Iterator;
import java.util.List;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

        UserDao userDao=(UserDao)context.getBean("userDao");
        System.out.println(userDao.countAll());

        User user=new User();
        user.setUserName("虚");
        user.setPassword("1256");
        user.setComment("注");
        userDao.insert(user);

        List<User> users = userDao.selectAll(); //mybatis java orm
        Iterator<User> iter = users.iterator();
        while(iter.hasNext()){
            User u = iter.next();
            System.out.println("用户名："+u.getUserName()+"密码："+u.getPassword());
        }

        user.setComment("comment");
        userDao.update(user);

        userDao.delete("虚");
        System.out.println("记录条数："+userDao.countAll());

        List<User> users2 = userDao.selectAll();
        Iterator<User> iter2 = users2.iterator();
        while(iter2.hasNext()){
            User u2 = iter2.next();
            System.out.println("用户名："+u2.getUserName()+"密码："+u2.getPassword());
        }

        System.out.println("hello,this is my first mybatis program");
    }

}

上图和下图是该程序所使用的数据库图