SSM快速搭建
基本环境搭建
1、 创建Maven工程
2、 导入项目相关依赖的jar包
-
spring
-
springmvc
-
mybatis
-
mysql
-
junit
-
spring-test
-
lombok
-
devtools
<?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>org.example</groupId>
<artifactId>ssm-crud</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.2.8.RELEASE</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.11.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.0</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.21</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.24</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.8.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.4.0</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.1.10</version>
</dependency>
<dependency>
<groupId>com.github.jsqlparser</groupId>
<artifactId>jsqlparser</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>1.5.6.RELEASE</version>
<optional>true</optional>
</dependency>
</dependencies>
</project>
3、 引用bootstrap前端框架
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<!-- 可选的 Bootstrap 主题文件（一般不用引入） -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
4、 编写ssm相关配置文件
- web.xml
- spring-mvc.xml
- appicationContext.xml
- spring-mybatis.xml
- jdbc.properties
4.1、web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!--全局初始化参数-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--监听器，用来加载applicationContext.xml-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--监听器，用来解决关闭tomcat时产生的错误->“为防止内存泄漏，JDBC驱动程序已被强制取消注册。”-->
<listener>
<listener-class>com.example.demo.Listener.MyContextListener</listener-class>
</listener>
<!--前端控制器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--字符编码过滤器-->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!--设置项目中使用的字符编码-->
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<!--强制请求对象（HttpServletRequest）使用encoding编码的值-->
<init-param>
<param-name>forceRequestEncoding</param-name>
<param-value>true</param-value>
</init-param>
<!--强制应答对象（HttpServletResponse）使用encoding编码的值-->
<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>
<!--可以将post请求转成delete或put请求-->
<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>
4.2、spring-mvc.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: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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!--视图解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--组件扫描-->
<context:component-scan base-package="com.example.demo.controller" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--不拦截静态资源-->
<mvc:default-servlet-handler/>
<!--开启注解驱动-->
<mvc:annotation-driven/>
</beans>
4.3、appicationContext.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:context="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">
<!--=====================================Spring配置和整合Mybatis=====================================-->
<!--加载jdbc.properties-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!--配置数据源-->
<bean id="druid" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<context:component-scan base-package="com.example.demo">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--spring整合mybatis-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--mybatis的配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="dataSource" ref="druid"/>
<!--映射器配置文件-->
<property name="mapperLocations" value="classpath:mapper/*Mapper.xml"/>
</bean>
<!--扫描器，将mybatis的dao接口实现加入ioc容器-->
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--扫描包-->
<property name="basePackage" value="com.example.demo.dao"/>
</bean>
<!--=====================================事务控制的配置=====================================-->
<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="druid"/>
</bean>
<!--配置事务增强-->
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="*" rollback-for="Exception"/>
<tx:method name="get*" read-only="true"/>
</tx:attributes>
</tx:advice>
<!--配置事务-->
<aop:config>
<aop:pointcut id="pointcut" expression="execution(* com.example.demo.service.impl..*.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
</aop:config>
</beans>
4.4、spring-mybatis.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>
<!-- 开启驼峰匹配 -->
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!-- 打印查询语句 -->
<!-- <setting name="logImpl" value="STDOUT_LOGGING" /> -->
</settings>
<!-- 使用扫描包，扫描指定包下的所有类，扫描之后的别名就是类名（不区分大小写），建议使用的时候和类名一致。 -->
<typeAliases>
<package name="com.example.demo.domain" />
</typeAliases>
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
</plugin>
</plugins>
</configuration>
4.5、jdbc.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
jdbc.username=root
jdbc.password=12345678
4.6、log4j.properties
#############
# 输出到控制台
#############
# log4j.rootLogger日志输出类别和级别：只输出不低于该级别的日志信息DEBUG < INFO < WARN < ERROR < FATAL
# WARN：日志级别 CONSOLE：输出位置自己定义的一个名字 logfile：输出位置自己定义的一个名字
log4j.rootLogger=WARN,CONSOLE,logfile
# 配置CONSOLE输出到控制台
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
# 配置CONSOLE设置为自定义布局模式
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
# 配置CONSOLE日志的输出格式 [frame] 2019-08-22 22:52:12,000 %r耗费毫秒数 %p日志的优先级 %t线程名 %C所属类名通常为全类名 %L代码中的行号 %x线程相关联的NDC %m日志 %n换行
log4j.appender.CONSOLE.layout.ConversionPattern=[frame] %d{yyyy-MM-dd HH:mm:ss,SSS} - %-4r %-5p [%t] %C:%L %x - %m%n
################
# 输出到日志文件中
################
# 配置logfile输出到文件中 文件大小到达指定尺寸的时候产生新的日志文件
log4j.appender.logfile=org.apache.log4j.RollingFileAppender
# 保存编码格式
log4j.appender.logfile.Encoding=UTF-8
# 输出文件位置此为项目根目录下的logs文件夹中
log4j.appender.logfile.File=logs/root.log
# 后缀可以是KB,MB,GB达到该大小后创建新的日志文件
log4j.appender.logfile.MaxFileSize=10MB
# 设置滚定文件的最大值3 指可以产生root.log.1、root.log.2、root.log.3和root.log四个日志文件
log4j.appender.logfile.MaxBackupIndex=3
# 配置logfile为自定义布局模式
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %F %p %m%n
##########################
# 对不同的类输出不同的日志文件
##########################
# club.bagedate包下的日志单独输出
log4j.logger.club.bagedate=DEBUG,bagedate
# 设置为false该日志信息就不会加入到rootLogger中了
log4j.additivity.club.bagedate=false
# 下面就和上面配置一样了
log4j.appender.bagedate=org.apache.log4j.RollingFileAppender
log4j.appender.bagedate.Encoding=UTF-8
log4j.appender.bagedate.File=logs/bagedate.log
log4j.appender.bagedate.MaxFileSize=10MB
log4j.appender.bagedate.MaxBackupIndex=3
log4j.appender.bagedate.layout=org.apache.log4j.PatternLayout
log4j.appender.bagedate.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %F %p %m%n
5、工具类
5.1.1 Msg（封装返回信息的对象）
@Data
public class Msg {
//100代表成功，200代表失败
private int code;
private String message;
private Map<String, Object> data;
public Msg() {
data = new HashMap<>();
}
public static Msg success() {
Msg msg = new Msg();
msg.setCode(100);
msg.setMessage("处理成功!");
return msg;
}
public static Msg error() {
Msg msg = new Msg();
msg.setCode(200);
msg.setMessage("处理失败！");
return msg;
}
public Msg addData(String s, Object o) {
data.put(s, o);
return this;
}
}
6、mybatis generator（mybatis逆向工程）
6.1、配置文件
<?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">
<commentGenerator>
<!-- 是否去除自动生成的注释 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!-- Mysql数据库连接的信息：驱动类、连接地址、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"
userId="root"
password="12345678">
</jdbcConnection>
<!-- Oracle数据库
<jdbcConnection driverClass="oracle.jdbc.OracleDriver"
connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg"
userId="yycg"
password="yycg">
</jdbcConnection>
-->
<!-- 默认为false，把JDBC DECIMAL 和NUMERIC类型解析为Integer，为true时
把JDBC DECIMAL 和NUMERIC类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- targetProject：生成POJO类的位置 -->
<javaModelGenerator targetPackage="com.example.demo.domain" targetProject=".\src\generation">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false"/>
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- targetProject：mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.example.demo.mapper" targetProject=".\src\generation">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- targetProject：mapper接口生成的的位置 -->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.example.demo.dao" targetProject=".\src\generation">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 指定数据表 -->
<table schema="" tableName="ssm_emp"/>
<table schema="" tableName="ssm_dept"/>
<!-- 有些表的字段需要指定java类型
<table schema="DB2ADMIN" tableName="ALLTYPES" domainObjectName="Customer" >
<property name="useActualColumnNames" value="true"/>
<generatedKey column="ID" sqlStatement="DB2" identity="true" />
<columnOverride column="DATE_FIELD" property="startDate" />
<ignoreColumn column="FRED" />
<columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />
</table> -->
<!-- mapper生成不带有Example的方法
<table tableName="ssm_emp"
enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false">
</table>-->
</context>
</generatorConfiguration>
6.2、生成文件的类
public class Generator {
@Test
public void generator() throws Exception {
List<String> warnings = new ArrayList<String>();
// 指定配置文件
File configFile = new File("F:/MyProjects/complete/ssm-crud/generatorConfig.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(true);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
}
}
遇到的坑
坑一
c3p0-0.9.5.2 jar包缺少其它依赖
解决办法：添加mchange-commons-java-0.2.20 jar包（注意jar包版本）
<dependency>
<groupId>com.mchange</groupId>
<artifactId>mchange-commons-java</artifactId>
<version>0.2.20</version>
</dependency>
坑二
pagehelper-5.1.10 jar包缺少其它依赖
解决方法：添加jsqlparser-3.1 jar包（注意jar包版本）
<dependency>
<groupId>com.github.jsqlparser</groupId>
<artifactId>jsqlparser</artifactId>
<version>3.1</version>
</dependency>
坑三
关闭tomcat时报错
错误提示：Web应用程序[ROOT]似乎启动了一个名为[C3P0PooledConnectionPoolManager[identityToken->31usy7ac1ocyx2d1tj3xmv|630da823]-AdminTaskTimer]的线程，但未能停止它。这很可能会造成内存泄漏。
解决方法: 换数据源druid
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.24</version>
</dependency>
坑四
关闭tomcat时报错
错误提示：为防止内存泄漏，JDBC驱动程序已被强制取消注册。
解决方法：配置监听器jie
<!--监听器，用来解决关闭tomcat时产生的错误->“为防止内存泄漏，JDBC驱动程序已被强制取消注册。”-->
<listener>
<listener-class>com.example.demo.config.listener.MyContextListener</listener-class>
</listener>
public class MyContextListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent arg0) {
System.out.println("webService start");
}
@Override
public void contextDestroyed(ServletContextEvent arg0) {
System.out.println("webService stop");
try {
while (DriverManager.getDrivers().hasMoreElements()) {
DriverManager.deregisterDriver(DriverManager.getDrivers().nextElement());
}
System.out.println("jdbc Driver close");
AbandonedConnectionCleanupThread.checkedShutdown();
System.out.println("clean thread success");
} catch (SQLException e) {
e.printStackTrace();
}
}
}
坑五
使用lombok插件，编写实体类时，某成员变量的第二个字母为大写，导致springmvc无法接收前台传来的参数
解决方法：自己编写setter/getter
private Integer dId;
//解决dId无法接收参数的问题，下面的命名方式是JavaBean规范命名
public Integer getdId() {
return dId;
}
public void setdId(Integer dId) {
this.dId = dId;
}
浙公网安备 33010602011771号