ssm实现crud_创建项目（1）

1、创建maven项目

创建maven的java web空项目后配置maven的xml文件，需要的相关jar包信息可通过https://mvnrepository.com/进行搜索。配置文件完整内容如下：

<?xml version="1.0" encoding="UTF-8"?><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>www.mk95.cn</groupId>    <artifactId>ssm_crud</artifactId>    <version>1.0-SNAPSHOT</version>    <dependencies>        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>4.3.9.RELEASE</version>        </dependency>        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.3.9.RELEASE</version>        </dependency>        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-aspects</artifactId>            <version>4.3.9.RELEASE</version>        </dependency>        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.4.2</version>        </dependency>        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.3.1</version>        </dependency>        <!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->        <dependency>            <groupId>c3p0</groupId>            <artifactId>c3p0</artifactId>            <version>0.9.1.2</version>        </dependency>        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.38</version>        </dependency>        <!-- https://mvnrepository.com/artifact/jstl/jstl -->        <dependency>            <groupId>jstl</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <scope>provided</scope>        </dependency>        <!-- https://mvnrepository.com/artifact/junit/junit -->        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.12</version>            <scope>test</scope>        </dependency>    </dependencies></project>

下载jar包的时候发现很慢，将maven的conf目录下的settings.xml中<mirrors>标签内容设置如下：

<mirror>  <id>alimaven</id>  <name>aliyun maven</name>  <url>http://maven.aliyun.com/nexus/content/groups/public/</url>  <mirrorOf>central</mirrorOf>        </mirror>

2、相关的配置文件

web.xml完整内容如下：

<!DOCTYPE web-app PUBLIC        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"        "http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app>    <display-name>Archetype Created Web Application</display-name>    <!--spring配置文件-->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>WEB-INF/springContext.xml</param-value>    </context-param>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!--spring MVC前端控制器-->    <servlet>        <servlet-name>springDispatcherServlet</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>WEB-INF/springDispatcherServlet.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>springDispatcherServlet</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <!--字符编码过滤器,存在多个过滤器时，这个应该在第一个-->    <filter>        <filter-name>CharacterEncodingFilter</filter-name>        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>        <init-param>            <param-name>encoding</param-name>            <param-value>utf-8</param-value>        </init-param>        <init-param>            <param-name>forceRequestEncoding</param-name>            <param-value>true</param-value>        </init-param>        <init-param>            <param-name>forceResponseEncoding</param-name>            <param-value>true</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>CharacterEncodingFilter</filter-name>        <url-pattern>/</url-pattern>    </filter-mapping>    <!--REST风格URI-->    <filter>        <filter-name>HiddenHttpMethodFilter</filter-name>        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>HiddenHttpMethodFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping></web-app>

spring MVC配置文件完整内容如下：

<?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"       xmlns:mvc="http://www.springframework.org/schema/mvc"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">    <!--spring MVC配置文件，包含网站跳转逻辑的控制-->    <context:component-scan base-package="cn.mk95.www.ssm_crud.controller" use-default-filters="false">        <!--只扫描控制器-->        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>    </context:component-scan>    <!--配置视图解析器，方便页面返回-->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/WEB-INF/views"/>        <property name="suffix" value=".jsp"/>    </bean>    <!--将spring不能处理的交给tomcat，比如静态资源-->    <mvc:default-servlet-handler/>    <!--支持pring MVC更高级的功能，比如JSR303校验、快捷的ajac请求。。。-->    <mvc:annotation-driven/></beans>

spring 配置文件完整内容如下：

<?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:content="http://www.springframework.org/schema/context"       xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">    <!--加载数据库相关的配置文件-->    <content:property-placeholder location="classpath:dbconfig.properties"/>    <bean id="pooledDAtaSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">        <property name="jdbcUrl" value="${jdbc.url}"/>        <property name="user" value="${jdbc.user}"/>        <property name="password" value="${jdbc.password}"/>        <property name="driverClass" value="${jdbc.driver}"/>    </bean>    <content:component-scan base-package="cn.mk95.www.ssm_crud">        <!--不扫描控制器-->        <content:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>    </content:component-scan>    <!--控制和MyBatis整合-->    <bean class="org.mybatis.spring.SqlSessionFactoryBean">        <!--指定Mybatis全局配置文件路径-->        <property name="configLocation" value="classpath:mybatis-config.xml"/>        <property name="dataSource" ref="pooledDAtaSource"/>        <!--指定mybatis的mapper文件路径-->        <property name="mapperLocations" value="classpath*:/mapper/*Mapper.xml"/>    </bean>    <!--配置扫描器，将mybatis的接口实现加入到ioc容器-->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="cn.mk95.www.ssm_crud.dao"/>    </bean>    <!--事务控制的配置-->    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="pooledDAtaSource"/>    </bean>    <!--基于配置的事务管理-->    <aop:config>        <!--切入点表达式-->        <aop:pointcut id="txPoint" expression="execution(* cn.mk95.www.ssm_crud.dao..*(..))"/>        <!--配置事务增强-->        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>    </aop:config>    <!--事务增强规则-->    <tx:advice id="txAdvice" transaction-manager="transactionManager">        <tx:attributes>            <tx:method name="*"/>            <tx:method name="find*" read-only="true"/>        </tx:attributes>    </tx:advice></beans>

mybatis配置文件的编写：

<?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>    <settings>        <!--开启自动驼峰命名规则（camel case）映射-->        <setting name="mapUnderscoreToCamelCase" value="true"/>    </settings>    <!--bean的别名-->    <typeAliases>        <package name="cn.mk95.www.ssm_crud.bean"/>    </typeAliases></configuration>

3、使用MyBatis逆向工程

在maven配置文件添加使用MyBatis逆向工程需要的jar包：

    <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->    <dependency>      <groupId>org.mybatis.generator</groupId>      <artifactId>mybatis-generator-core</artifactId>      <version>1.3.5</version>    </dependency>

配置逆向需要的xml文件：

<?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>    <context id="DB2Tables" targetRuntime="MyBatis3">        <!--配置数据库连接信息-->        <jdbcConnection driverClass="com.mysql.jdbc.Driver"                        connectionURL="jdbc:mysql://localhost:3306/ssm_crud"                        userId="yyh"                        password="123456">        </jdbcConnection>        <javaTypeResolver >            <property name="forceBigDecimals" value="false" />        </javaTypeResolver>        <!--指定java bean生成的位置-->        <javaModelGenerator targetPackage="cn.mk95.www.ssm_crud.bean" targetProject=".\src\main\java">            <property name="enableSubPackages" value="true" />            <property name="trimStrings" value="true" />        </javaModelGenerator>        <!--指定mapper文件生成位置-->        <sqlMapGenerator targetPackage="mapper"  targetProject=".\src\main\resources">            <property name="enableSubPackages" value="true" />        </sqlMapGenerator>        <!--指定dao接口生成的位置-->        <javaClientGenerator type="XMLMAPPER" targetPackage="cn.mk95.www.ssm_crud.dao"  targetProject=".\src\main\java">            <property name="enableSubPackages" value="true" />        </javaClientGenerator>        <!--指定每个表的生成策略-->        <table tableName="user" domainObjectName="User"></table>        <table tableName="team" domainObjectName="Team"></table>    </context></generatorConfiguration>

运行代码生成相关文件：

package cn.mk95.www.ssm_crud.test;import org.mybatis.generator.api.MyBatisGenerator;import org.mybatis.generator.config.Configuration;import org.mybatis.generator.config.xml.ConfigurationParser;import org.mybatis.generator.exception.InvalidConfigurationException;import org.mybatis.generator.exception.XMLParserException;import org.mybatis.generator.internal.DefaultShellCallback;import java.io.File;import java.io.IOException;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;public class MbgTest {    public static void main(String[] args) {        List<String> warnings = new ArrayList<String>();        boolean overwrite = true;        File configFile = new File("mbg.xml");        ConfigurationParser cp = new ConfigurationParser(warnings);        Configuration config = null;        try {            config = cp.parseConfiguration(configFile);        } catch (IOException e) {            e.printStackTrace();        } catch (XMLParserException e) {            e.printStackTrace();        }        DefaultShellCallback callback = new DefaultShellCallback(overwrite);        MyBatisGenerator myBatisGenerator = null;        try {            myBatisGenerator = new MyBatisGenerator(config, callback, warnings);        } catch (InvalidConfigurationException e) {            e.printStackTrace();        }        try {            myBatisGenerator.generate(null);        } catch (SQLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } catch (InterruptedException e) {            e.printStackTrace();        }    }}

以上代码可通过mybatis generator官网查询。

最终生成的项目结构：