mybatis+spring配置

可参考：http://www.javacodegeeks.com/2014/02/building-java-web-application-using-mybatis-with-spring.html

自己对mybatis的spring配置不太熟，弄好了好久总算弄出来了。总结下好了！

1. 新建web maven工程。

以idea自带的spring_mvc模板开个web工程就好。

2. pom.xml配置

pom中需要新增以下jar包

• mybatis (for MyBatis support)
• mybatis-spring (for MyBatis-Spring integration support)
• mysql-connector-java (for MYSQL support)
• tomcat-jdbc (for Tomcat support MYSQL connection)
• defind the location of source & resource 

<properties>
        <spring.version>4.1.3.RELEASE</spring.version>
        <mybatis.version>3.3.0</mybatis.version>
        <mybatis-spring.version>1.2.3</mybatis-spring.version>
        <mysql.version>5.1.21</mysql.version>
        <tomcat-jdbc.version>7.0.30</tomcat-jdbc.version>
</properties>

<dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis-spring.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jdbc</artifactId>
            <version>${tomcat-jdbc.version}</version>
        </dependency>
</dependencies>
<build>
        <finalName>my_test</finalName>
        <sourceDirectory>src/main/java</sourceDirectory>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
</build>

3. web.xml

我的实践中web.xml保持原状。

<web-app version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>Spring MVC Application</display-name>
        <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

4. 修改mvc-dispatcher-servlet.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:mvc="http://www.springframework.org/schema/mvc"
         xmlns:context="http://www.springframework.org/schema/context"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
                http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                http://www.springframework.org/schema/context
                http://www.springframework.org/schema/context/spring-context-3.0.xsd
                http://www.springframework.org/schema/mvc
                http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
                http://www.springframework.org/schema/context
                http://www.springframework.org/schema/context/spring-context-3.0.xsd"
        >

    <!--配置ViewResolver-->
    <!--InternalResourceViewResolver支持 servlet、JSP视图解析-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/pages/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!--配置DataSource数据源-->
    <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!--Tomcat jdbc pool是apache在tomcat7版本中启用的新连接池，用它来解决以往DBCP无法解决的一些问题-->
    <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close" autowire="no">
        <property name="fairQueue" value="false" />
        <property name="minIdle" value="5" />
        <property name="maxIdle" value="10" />
        <property name="maxActive" value="50" />
        <property name="initialSize" value="1" />
        <property name="testOnBorrow" value="true" />
        <property name="validationQuery" value="select 1" />
        <property name="validationInterval" value="500000" />
        <property name="removeAbandoned" value="true" />
        <property name="removeAbandonedTimeout" value="30" />
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/accounts" />
        <property name="username" value="name" />
        <property name="password" value="passwd" />
    </bean>

    <!--配置SqlSessionFactoryBean-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="mapperLocations" value="classpath:*.xml" />
    </bean>

    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg ref="sqlSessionFactory" />
    </bean>
    <!--查 找 类 路 径 下 的 映 射 器 并 自 动 将 它 们 创 建 成 MapperFactoryBean-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.springapp.mvc.mapper" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>

   
    <context:annotation-config />
    <context:component-scan base-package="com.springapp.mvc" />

</beans>

4. 各种类

因为此篇主要想讲讲如果使用在spring中进行mybatis配置，所以代码的分层不太严格。完成后代码树长这样：

4.1 controller

package com.springapp.mvc;

import org.apache.ibatis.session.SqlSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Repository;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;

@Controller
@RequestMapping("/")
public class HelloController {
    @Resource
    private SqlSession sqlSession;

    @RequestMapping(method = RequestMethod.GET)
    public ModelAndView test(ModelMap mode){
　　　　//需结合accountMapper.xml来看。Account为namespace的值；getAccountByOwner为select的id值
        Account account =  sqlSession.selectOne("Account.getAccountByOwner");
        ModelAndView mv = new ModelAndView();
        mv.setViewName("hello");
        mv.addObject("Account",account);
        return mv;
    }
}

4.2 Account

package com.springapp.mvc;

import java.math.BigDecimal;

/**
 * Created by Administrator on 2015/10/25.
 */
public class Account {
    private Integer accountId;
    private String account; 
    private String owner;
    private BigDecimal balance;

    public String getOwner() {
        return owner;
    }

    public void setOwner(String owner) {
        this.owner = owner;
    }

    public Integer getAccountId() {
        return accountId;
    }

    public void setAccountId(Integer accountId) {
        this.accountId = accountId;
    }

    public String getAccount() {
        return account;
    }

    public void setAccount(String account) {
        this.account = account;
    }

    public BigDecimal getBalance() {
        return balance;
    }

    public void setBalance(BigDecimal balance) {
        this.balance = balance;
    }

    public String toString(){
        return "" + this.getAccountId() + "|" + this.getOwner() + "|"  +
                this.getAccount() +  ";";

    }
}

4.3 AccountMapper

package com.springapp.mvc.mappers;

import com.springapp.mvc.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Options;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

/**
 * Created by Administrator on 2015/11/8.
 */
@Repository
public interface AccountMapper {
//可以使用annotation的方式来进行数据库操作
//    @Insert("INSERT INTO accounts(owner,account,type,balance) VALUES"
//            + "(#{owner},#{account},#{type},#{balance})")
//    @Options(useGeneratedKeys = true, keyProperty = "id", flushCache = true, keyColumn = "id")
//    public void insertAccount(Account account);

//也可使用xml配置方式来操作数据库，本例中即使用xml来操作数据库
//    @Select("SELECT OWNER as owner, ACCOUNT as account, TYPE as type,"
//            + "BALANCE as balance FROM accounts WHERE owner=#{owner}")
    public Account getAccountByOwner();
}

4.4 accountMapper.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="Account">
    <!--select结果与返回类的对应关系 -->
    <resultMap id="AccountResult" type="com.springapp.mvc.Account">
        <id column="id" jdbcType="INTEGER" property="accountId"/>
        <result column="owner" jdbcType="CHAR" property="owner"/>
        <result column="account" jdbcType="CHAR" property="account"/>
        <result column="balance" jdbcType="DECIMAL" property="balance"/>
    </resultMap>

    <select id="getAccountByOwner" resultMap="AccountResult">
      select id, owner, account, balance from accounts where id="1"
    </select>

</mapper>

4.4 hello.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
${Account}
</body>
</html>

5. 操作数据库，准备数据

create database accounts;
use accounts;
CREATE TABLE `accounts` (
  `id` int(5) NOT NULL AUTO_INCREMENT,
  `owner` char(10) NOT NULL,
  `account` char(10) DEFAULT NULL,
  `balance` decimal(9,2) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
INSERT accounts values(1,'haha', '中国', 12000);

6. 运行tomcat即可搜出刚才插入的数据了。