SpringMvc+Mybatis 框架搭建

2022-10-05 12:03:27

开篇：在main/resources下新建dbconfig.properties、spring.xml、spring-mybatis.xml，内容如下：

driverClassName=com.mysql.jdbc.Driver

validationQuery=SELECT 1

jdbc_url=jdbc:mysql://localhost:3306/dangdb?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull

jdbc_username=root

jdbc_password=root

dbconfig.properties

<?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: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">

    <!-- 引入dbconfig.properties属性文件 -->

    <context:property-placeholder location="classpath:dbconfig.properties" />

    <!-- 自动扫描(自动注入)，扫描me.gacl.service这个包以及它的子包的所有使用@Service注解标注的类 -->

    <context:component-scan base-package="com.dang.service" />

</beans>

spring.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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx-3.0.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.0.xsd

">

    <!-- JNDI方式配置数据源 -->

    <!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> -->

    <!-- ========================================配置数据源========================================= -->

    <!-- 配置数据源，使用的是alibaba的Druid(德鲁伊)数据源 -->

    <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">

        <property name="url" value="${jdbc_url}" />

        <property name="username" value="${jdbc_username}" />

        <property name="password" value="${jdbc_password}" />

        <!-- 初始化连接大小 -->

        <property name="initialSize" value="0" />

        <!-- 连接池最大使用连接数量 -->

        <property name="maxActive" value="20" />

        <!-- 连接池最大空闲 -->

        <property name="maxIdle" value="20" />

        <!-- 连接池最小空闲 -->

        <property name="minIdle" value="0" />

        <!-- 获取连接最大等待时间 -->

        <property name="maxWait" value="60000" />

        <!--

        <property name="poolPreparedStatements" value="true" />

        <property name="maxPoolPreparedStatementPerConnectionSize" value="33" />

        -->

        <property name="validationQuery" value="${validationQuery}" />

        <property name="testOnBorrow" value="false" />

        <property name="testOnReturn" value="false" />

        <property name="testWhileIdle" value="true" />

        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->

        <property name="timeBetweenEvictionRunsMillis" value="60000" />

        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->

        <property name="minEvictableIdleTimeMillis" value="25200000" />

        <!-- 打开removeAbandoned功能 -->

        <property name="removeAbandoned" value="true" />

        <!-- 1800秒，也就是30分钟 -->

        <property name="removeAbandonedTimeout" value="1800" />

        <!-- 关闭abanded连接时输出错误日志 -->

        <property name="logAbandoned" value="true" />

        <!-- 监控数据库 -->

        <!-- <property name="filters" value="stat" /> -->

        <property name="filters" value="mergeStat" />

    </bean>

    <!-- ========================================分隔线========================================= -->

    <!-- ========================================针对myBatis的配置项============================== -->

    <!-- 配置sqlSessionFactory -->

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

        <!-- 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 -->

        <property name="dataSource" ref="dataSource" />

        <!-- 自动扫描com/dang/mapping/目录下的所有SQL映射的xml文件, 省掉Configuration.xml里的手工配置

        value="classpath:com/dang/mapping/*.xml"指的是classpath(类路径)下me.gacl.mapping包中的所有xml文件

        UserMapper.xml位于com/dang.mapping包下，这样UserMapper.xml就可以被自动扫描

         -->

        <property name="mapperLocations" value="classpath:com/dang/mapping/*.xml" />

    </bean>

    <!-- 配置扫描器 -->

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

        <!-- 扫描com/dang.dao这个包以及它的子包下的所有映射接口类 -->

        <property name="basePackage" value="com.dang.dao" />

        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />

    </bean>

    <!-- ========================================分隔线========================================= -->

    <!-- 配置Spring的事务管理器 -->

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

        <property name="dataSource" ref="dataSource" />

    </bean>

    <!-- 注解方式配置事物 -->

    <!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->

    <!-- 拦截器方式配置事物 -->

    <tx:advice id="transactionAdvice" transaction-manager="transactionManager">

        <tx:attributes>

            <tx:method name="add*" propagation="REQUIRED" />

            <tx:method name="append*" propagation="REQUIRED" />

            <tx:method name="insert*" propagation="REQUIRED" />

            <tx:method name="save*" propagation="REQUIRED" />

            <tx:method name="update*" propagation="REQUIRED" />

            <tx:method name="modify*" propagation="REQUIRED" />

            <tx:method name="edit*" propagation="REQUIRED" />

            <tx:method name="delete*" propagation="REQUIRED" />

            <tx:method name="remove*" propagation="REQUIRED" />

            <tx:method name="repair" propagation="REQUIRED" />

            <tx:method name="delAndRepair" propagation="REQUIRED" />

            <tx:method name="get*" propagation="SUPPORTS" />

            <tx:method name="find*" propagation="SUPPORTS" />

            <tx:method name="load*" propagation="SUPPORTS" />

            <tx:method name="search*" propagation="SUPPORTS" />

            <tx:method name="datagrid*" propagation="SUPPORTS" />

            <tx:method name="*" propagation="SUPPORTS" />

        </tx:attributes>

    </tx:advice>

    <aop:config>

        <aop:pointcut id="transactionPointcut" expression="execution(* com.dang.service..*Impl.*(..))" />

        <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />

    </aop:config>

    <!-- 配置druid监控spring jdbc -->

    <bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">

    </bean>

    <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype">

        <property name="patterns">

            <list>

                <value>com.dang.service.*</value>

            </list>

        </property>

    </bean>

    <aop:config>

        <aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />

    </aop:config>

</beans>

spring-mybatis.xml

1、在com.dang目录下新建文件夹如下图：

2、根据mybatis-generator工具生成数据表的相关代码和sql映射文件

打开http://mvnrepository.com/ 搜索mybatis-generator-core，这里我选择了最新版的1.3.5

解压后找到lib目录，把当前使用的mysql jar包放在此目录下，并新建generator.xml 文件，内容如下

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>

    <!--targetProject：生成文件存放路径，方便起见在同级目录新建src文件夹，都存放在此文件夹-->

    <!-- 数据库驱动包位置 因放在同级文件夹，可直接写包名-->

    <classPathEntry location="mysql-connector-java-5.1.39.jar" />

    <context id="DB2Tables" targetRuntime="MyBatis3">

        <commentGenerator>

            <property name="suppressAllComments" value="true" />

        </commentGenerator>

        <!-- 数据库链接URL、用户名、密码 -->

        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/dangdb" userId="root" password="root">

        </jdbcConnection>

        <javaTypeResolver>

            <property name="forceBigDecimals" value="false" />

        </javaTypeResolver>

        <!-- 生成实体类的包名和位置，这里配置将生成的实体类放在com.dang.model这个包下 -->

        <javaModelGenerator targetPackage="com.dang.model" targetProject="src">

            <property name="enableSubPackages" value="true" />

            <property name="trimStrings" value="true" />

        </javaModelGenerator>

        <!-- 生成的SQL映射文件包名和位置，这里配置将生成的SQL映射文件放在com.dang.mapping这个包下 -->

        <sqlMapGenerator targetPackage="com.dang.mapping" targetProject="src">

            <property name="enableSubPackages" value="true" />

        </sqlMapGenerator>

        <!-- 生成DAO的包名和位置，这里配置将生成的dao类放在com.dang.model这个包下 -->

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.dang.dao" targetProject="src">

            <property name="enableSubPackages" value="true" />

        </javaClientGenerator>

        <!-- 要生成那些表(更改tableName和domainObjectName就可以) -->

        <table tableName="sysuser" domainObjectName="SysUser" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />

    </context>

</generatorConfiguration>

generator.xml

生成方法：选中lib文件夹【shift+右键】，选择“在此处打开命令窗口”打开cmd窗口，输入

java -jar mybatis-generator-core-1.3.5.jar -configfile generator.xml –overwrite

把生成的文件放入项目相应的文件夹

3、在service文件夹下新建SysUserService接口，impl下新建SysUserServiceImpl类

SysUserService内容如下：

package com.dang.service;

import com.dang.model.SysUser;

import java.util.List;

/**

 * Created by dang on 2017/1/5.

 */

public interface SysUserService {

    /**

     * 添加

     * @param sysUser

     */

    int addSysUser(SysUser sysUser);

    /**

     * 删除

     * @param id

     */

    int deleteBySysUserId(Integer id);

    /**

     * 修改

     * @param sysUser

     */

    int updateBySysUserId(SysUser sysUser);

    /**

     * 根据用户id获取用户

     * @param sysUserId

     * @return

     */

    SysUser getSysUserById(Integer sysUserId);

    List<SysUser> getAll();

}

SysUserService

SysUserServiceImpl内容如下：

package com.dang.service.impl;

import com.dang.dao.SysUserMapper;

import com.dang.model.SysUser;

import com.dang.service.SysUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import java.util.List;

/**

 * Created by dang on 2017/1/5.

 */

/**

 * 使用@Service注解将SysUserServiceImpl类标注为一个service

 * service的id是sysUserService

 */

@Service("sysUserService")

public class SysUserServiceImpl implements SysUserService{

    /**

     * 使用@Autowired注解标注sysUserMapper变量，

     * 当需要使用SysUserMapper时，Spring就会自动注入SysUserMapper

     */

    @Autowired

    private SysUserMapper sysUserMapper; //注入dao

    @Override

    public int addSysUser(SysUser sysUser) {

       return sysUserMapper.insert(sysUser);

    }

    @Override

    public int deleteBySysUserId(Integer id) {

        return sysUserMapper.deleteByPrimaryKey(id);

    }

    @Override

    public int updateBySysUserId(SysUser sysUser) {

        return sysUserMapper.updateByPrimaryKey(sysUser);

    }

    @Override

    public SysUser getSysUserById(Integer sysUserId) {

        return sysUserMapper.selectByPrimaryKey(sysUserId);

    }

    @Override

    public List<SysUser> getAll() {

        return sysUserMapper.getAll();

    }

}

SysUserServiceImpl

ps: getAll()方法因为在生成映射和sql语句时是没有的，要在SysUserMapper.xml文件中添加上去

并在dao文件夹SysUserMapper接口中加入此项，完整内容如下：

package com.dang.dao;

import com.dang.model.SysUser;

import java.util.List;

/**

 * 各方法名均要对应SysUserMapper.xml中各标签的【id】值

 */

public interface SysUserMapper {

    int deleteByPrimaryKey(Integer id);

    int insert(SysUser record);

    int insertSelective(SysUser record);

    SysUser selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(SysUser record);

    int updateByPrimaryKey(SysUser record);

    List<SysUser> getAll();

}

SysUserMapper

4、在controller文件夹添加SysUserController的java文件，内容如下：

package com.dang.controller;

import com.dang.model.SysUser;

import com.dang.service.SysUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import java.util.List;

/**

 * Created by dang on 2017/1/5.

 */

@Controller

@RequestMapping(value = "sysuser")

public class SysUserController {

    @Autowired

    private SysUserService sysUserService;

    @RequestMapping(value = "list", method = RequestMethod.GET)

    public String list(ModelMap modelMap) {

        List<SysUser> list = sysUserService.getAll();

        modelMap.addAttribute("list", list);

        return "sysuser/list";

    }

}

SysUserController

在webapp\WEB-INF\View 文件夹下新建sysuser/list.jsp，内容如下：

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%--

  Created by IntelliJ IDEA.

  User: dang

  Date: 2017/1/5

  Time: 15:36

  To change this template use File | Settings | File Templates.

--%>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

<head>

    <title>list</title>

</head>

<body>

<table>

    <tr>

        <td>ID</td>

        <td>用户名</td>

        <td>密码</td>

    </tr>

    <c:forEach var="list" items="${list}">

        <tr>

            <td>${list.id}</td>

            <td>${list.username}</td>

            <td>${list.userpwd}</td>

        </tr>

    </c:forEach>

</table>

</body>

</html>

list.jsp

ps：添加、修改的一些操作也大致如此

运行项目，打开 http://localhost:8080/sysuser/list

运行成功，项目配置完成。

整个项目结构如下：

mybatis-generator下载

码农公寓

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