SSM框架
SSM的步骤，要学习本知识，需要具备Spring, SpringMVC, Mybatis 的基础，如果没有这些基础，请把基础掌握之后再学习，不要跳跃学习，欲速则不达。
必读： 基于框架的程序要成功运行，对于JAR包的版本，配置文件的正确性有着苛刻的要求，任何一个地方出错了，都会导致框架程序运行失败。 如果你是第一次学习本框架，务必严格按照教程的指导，完全模仿操作，直到成功看到运行效果。 第一次成功之后，信心，思路都会有较好的铺垫，然后再根据自己的疑惑，在“成功”的代码上做原本想做的改动和调整，这样可以大大节约学习的时间，提高效率，切勿一来就擅自改动，给自己的学习制造障碍
/* SQLyog Ultimate v12.09 (64 bit) MySQL - 5.7.26-log : Database - ssm ********************************************************************* */ /*!40101 SET NAMES utf8 */; /*!40101 SET SQL_MODE=''*/; /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */; /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */; /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */; /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */; CREATE DATABASE /*!32312 IF NOT EXISTS*/`ssm` /*!40100 DEFAULT CHARACTER SET utf8 */; USE `ssm`; /*Table structure for table `user` */ DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `name` varchar(255) NOT NULL, `password` varchar(255) DEFAULT NULL, PRIMARY KEY (`name`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; /*Data for the table `user` */ insert into `user`(`name`,`password`) values ('leike1','11'),('王菲','111'); /*!40101 SET SQL_MODE=@OLD_SQL_MODE */; /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */; /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */; /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
<?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>com.leike</groupId> <artifactId>ssm_demo</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>ssm_demo Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <!--版本指定--> <spring.version>5.1.8.RELEASE</spring.version> <jackson.version>2.9.9</jackson.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!--spring依赖 ==start==--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <!--利用它来处理事务问题--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <!--spring依赖 ==end==--> <!--json依赖 ==start==--> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.4</version> <classifier>jdk15</classifier> </dependency> <!--添加处理json为javabean--> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-core-asl</artifactId> <version>1.9.13</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> <!--添加处理json为javabean ==end== --> <!--文件上传依赖 ==start==--> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.3</version> </dependency> <!--文件上传依赖 ==end==--> <!--mybatis依赖 ==start==--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <!--mybatis分页依赖 ps:中国《mybatis从入门到精通》作者写的--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.1.2</version> </dependency> <!--mybatis依赖 ==end==--> <!--mybatis与spring整合所需要的依赖--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.1</version> </dependency> <!--mysql依赖 ==start==--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> <!--mysql依赖 ==end==--> <!--日志依赖 ==start==--> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.26</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.26</version> </dependency> <!--日志依赖 ==end==--> <!-- 数据源引入 c3p0连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!-- servlet jsp jstL 等依赖 ==start== --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <!-- 将来我们的web容器将会提供这个jar包--> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- servlet jsp jstL 等依赖 ==end== --> <!--处理时间日期格式--> <dependency> <groupId>joda-time</groupId> <artifactId>joda-time</artifactId> <version>2.9.9</version> </dependency> <!--Apache用于MD5加密--> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency> <!-- SpringAOP需要的依赖 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.9.2</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.2</version> </dependency> </dependencies> <build> <finalName>ssm_demo</finalName> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build> </project>
配置jdbc.properties
jdbc.url=jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=UTF8 jdbc.username=root jdbc.password=1996 jdbc.driver=com.mysql.jdbc.Driver
配置log4j.properties
#定义LOG输出级别 log4j.rootLogger=INFO,Console,File #定义日志输出目的地为控制台 log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.Target=System.out #可以灵活的指定日志输出格式 , 下面一行是指定具体的格式 log4j.appender.Console.layout=org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=[%c]-%m%n #mybatis显示SQL语句日志配置 log4j.logger.com.leike.mapper=DEBUG #文件大小到达指定尺寸的时候产生一个新的文件 log4j.appender.File=org.apache.log4j.RollingFileAppender #指定输出目录 这里会放在tomcat之下 log4j.appender.File.File=D:/log.log #定义文件最大大小 log4j.appender.File.MaxFileSize=10MB #输出所有日志 如果换成DEBUG表示输出DEBUF以上级别的日志 log4j.appender.File.Threshold=ALL log4j.appender.file.layout=org.apache.log4j.PatternLayout log4j.appender.file.layout.ConversionPattern=[%p][%d{yyyy-MM-dd HH\:mm|\:ss}][%c]%m%n
配置spring相关配置
applicationContent
<?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.xsd"> <!--spring-*.xml 代指同一路径下的所有 spring-xxx.xml 文件--> <!-- 引入spring和其它整合的配置文件 --> <import resource="classpath:spring/spring-*.xml"></import> </beans>
spring-content
<?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" 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"> <!--1.spring容器注册--> <context:annotation-config/> <!--2.自动扫描配置--> <context:component-scan base-package="com.leike.service"/> <!--3.激活aop注解方式的代理--> <aop:aspectj-autoproxy/> <!--消息格式的转换--> <bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> <property name="registerDefaultFormatters" value="false"/> <property name="formatters"> <set> <bean class="org.springframework.format.number.NumberFormatAnnotationFormatterFactory"></bean> </set> </property> <property name="formatterRegistrars"> <set> <bean class="org.springframework.format.datetime.joda.JodaTimeFormatterRegistrar"> <property name="dateFormatter"> <bean class="org.springframework.format.datetime.joda.DateTimeFormatterFactoryBean"> <property name="pattern" value="yyyyMMdd"/> </bean> </property> </bean> </set> </property> </bean> </beans>
spring-mybatis
<?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" 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/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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 扫描，扫描注解类(除了控制层) --> <context:component-scan base-package="com.leike.mapper"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 加载资源文件 --> <context:property-placeholder location="classpath:jdbc.properties"/> <!-- 配置数据源 本项目使用c3p0连接池--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!--如果有需要,请把所有的属性全部写到properties文件当中去--> <!-- c3po链接池的私有属性 --> <property name="initialPoolSize" value="10"/> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 关闭连接后不自动commit--> <property name="autoCommitOnClose" value="false"/> <!-- 获取链接超时时间 --> <property name="checkoutTimeout" value="100000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!-- 最后关键一步 , 如何整合mybatis --> <!-- 1. 注入一股mybatis的sqlsessionFactiry 这就是我们所做的关键 2. 声明式的事物管理 --> <!-- myBatis的工厂类 --> <bean id="SqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- 引入mappers文件 --> <!-- 这里要求所有的mapper文件必须放在com/leike/mapper/之下 自动扫描mapper目录, 省掉Configuration.xml里的手工配置 --> <property name="mapperLocations" value="classpath:com/leike/mapper/**/*.xml"/> <property name="configuration"> <bean class="org.apache.ibatis.session.Configuration"> <!-- 可以使用驼峰命名 , 其它mybatis的配置也就是mybatis.cfg.xml的相关配置 --> <property name="mapUnderscoreToCamelCase" value="true"/> </bean> </property> <!-- 插件配置 --> <property name="plugins"> <array> <!-- 分页插件的配置 , 拦截器实现分页功能 --> <bean class="com.github.pagehelper.PageInterceptor"> <property name="properties"> <!-- 这里的几个配置主要演示如何使用 , 如果不理解 ,一定要去掉下面的配置 --> <value> <!--***--> <!-- helperDialect=mysql--> <!-- reasonable=true--> <!-- supportMethodsArguments=true--> <!-- params=count=countSql--> <!-- autoRuntimeDialect=true--> </value> </property> </bean> </array> </property> <!-- 配置数据库表对应的java实体类 --> <!-- <property name="typeAliasesPackage" value="com.leike.dao"/>--> </bean> <!-- 持久层接口 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.leike.mapper"/> <property name="sqlSessionFactoryBeanName" value="SqlSessionFactoryBean"/> </bean> <!-- 配置事务管理组件 --> <!-- 事务管理 使用数据源事务管理类进行管理 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 确定事务管理的策略transaction-manager:指向上面的transaction --> <tx:advice transaction-manager="transactionManager" id="transactionAdvice"> <!--事务处理的相关值以及它的传播性 --> <tx:attributes> <tx:method name="select*" read-only="true"/> <tx:method name="get*" read-only="true"/> <tx:method name="query*" read-only="true"/> <tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="insert*" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="add*" propagation="REQUIRED" rollback-for="Exception"/> </tx:attributes> </tx:advice> <!-- 使用AOP对事务管理的范围进行织入 明确几个点 1. 对哪些地方需要进行事务的管理 execution 书写 , 明确边界 2. 使用什么策略去管理 我们使用tx:advice全部书写于其中 , 在我们的aop的advisor当中只需要去引用这个事务管理者的建议即可--> <aop:config> <aop:pointcut expression="execution(* com.leike.service..*.*(..))" id="txCut"/> <aop:advisor advice-ref="transactionAdvice" pointcut-ref="txCut"/> </aop:config> <!-- 采用注解进行事务配置 , 请在Service的实现类上面加上@Transanctional注解 --> <tx:annotation-driven transaction-manager="transactionManager"/> </beans>
spring-servlet
<?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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c" xmlns:cache="http://www.springframework.org/schema/cache" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xmlns:task="http://www.springframework.org/schema/task" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.3.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.3.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-4.3.xsd"> <!-- 启动注解 排除service注解 --> <context:component-scan base-package="com.leike"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service"/> </context:component-scan> <!--配置一个视图解析器 常用内部资源视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 1. 前缀--> <property name="prefix" value="/jsp/"/> <!-- 2. 后缀--> <property name="suffix" value=".jsp"/> </bean> <!--文件上传解析器, id必须是multipartResolver原因是源码写死为这个名字--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!--定义最大长度的大小 总的 单位为 bytes--> <property name="maxUploadSize" value="10241024"/> <!--指定上传编码--> <property name="defaultEncoding" value="UTF-8"/> <!--指定单个文件最大上传大小--> <property name="maxUploadSizePerFile" value="2000000"/> </bean> <mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/**/*"/> <bean class="com.leike.interceptors.MethodTimerInterceptor"></bean> </mvc:interceptor> <mvc:interceptor> <!-- 只想拦截/user/**/* 还需要开放登录权限 静态资源的权限 --> <mvc:mapping path="/user/*"/> <!--排除登录的这个URI--> <mvc:exclude-mapping path="/user/login"/> <bean class="com.leike.interceptors.SessionInterceptor"></bean> </mvc:interceptor> </mvc:interceptors> <!--默认的servlet处理者 静态资源处理 只加这个的话相当于全部让他处理了--> <mvc:default-servlet-handler/> <!-- MVC驱动 为了让controller生效,要加这个注解驱动 激活springmvc消息转换功能--> <mvc:annotation-driven/> <!-- <mvc:resources mapping="/static/css/*" location="/static/css/"/>--> </beans>
配置mapper
<?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.leike.mapper.UserMapper">
<delete id="delete">
delete
from user
where name=#{name}
</delete>
<select id="query" resultType="com.leike.pojo.User">
select *
from user
where name = #{name}
and password = #{password}
</select>
</mapper>
实体类的创建
package com.leike.pojo; /** * @description: * @author: leike * @date: 2019-07-25 18:38 */ public class User { private String name; private String password; @Override public String toString() { return "User{" + "name='" + name + '\'' + ", password='" + password + '\'' + '}'; } public User() { } public User(String name, String password) { this.name = name; this.password = password; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
配置userMapper
package com.leike.mapper; import com.leike.pojo.User; /** * @description: * @author: leike * @date: 2019-07-25 18:40 */ public interface UserMapper { User query(User user); int delete(String name); }
配置service
package com.leike.service; import com.leike.pojo.User; /** * @description: * @author: leike * @date: 2019-07-25 19:09 */ public interface UserService { /** * 根据user信息去检查数据库是否存在用户 * @param user * @return */ User get(User user); boolean delete(String name); }
配置service的实现类
package com.leike.service.impl; import com.leike.mapper.UserMapper; import com.leike.pojo.User; import com.leike.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; /** * @description: * @author: leike * @date: 2019-07-25 19:12 */ @Service("userService") public class UserServiceImpl implements UserService { //注入mapper @Autowired private UserMapper userMapper; @Override public User get(User user) { //提前检查 if (user == null){ return null; } User u = userMapper.query(user); System.out.println(u); return u; } @Override public boolean delete(String name) { int row = userMapper.delete(name); return row==1?true:false; } }
配置controoler
package com.leike.controller; import com.leike.pojo.User; import com.leike.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpSession; import java.util.HashMap; import java.util.Map; /** * @description: * @author: leike * @date: 2019-07-25 18:54 */ @Controller @RequestMapping("/user") public class UserController { // 自动注入UserService @Autowired private UserService userService; @RequestMapping("/login") public String login(User user, HttpSession session, Model model) { //数据库查询 user = userService.get(user); System.out.println("login...."); if (user != null) { //将用户信息存储到会话当中 session.setAttribute("SESSION_USER", user); return "msg"; } else { model.addAttribute("msg", "账号或者密码错误");//因为用的是重定向,所以msg会失效 session.setAttribute("msg", "账号或者密码错误");//存到会话中就没问题了 return "redirect:/jsp/login.jsp"; } } @RequestMapping("/delete/{name}") @ResponseBody public Map<String,Integer> delete(@PathVariable("name") String name) { //数据库查询 boolean deleteSuc = userService.delete(name); int code = deleteSuc?2000:2003; Map<String, Integer> map = new HashMap<>(); map.put("code",code); return map; } }
添加登陆的拦截器
package com.leike.interceptors; /** * @description: * @author: leike * @date: 2019-07-22 21:34 */ import com.leike.pojo.User; import org.apache.log4j.Logger; import org.springframework.web.bind.annotation.SessionAttributes; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * 会话拦截器 */ public class SessionInterceptor implements HandlerInterceptor { private static final Logger LOGGER = Logger.getLogger(SessionAttributes.class); @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { Object user = request.getSession().getAttribute("SESSION_USER"); if (user == null){ LOGGER.warn("你不具备权限 , 请先登录"); return false; } if (user instanceof User){ User u = (User) user; u.setPassword(null); request.getSession().setAttribute("SESSION_USER",u); LOGGER.info(u.getName()+"处于登录状态 , 可以执行操作"); return true; }else { LOGGER.warn("请不要搞事 , 请先登录"); return false; } } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }
* 方法耗时统计拦截器
package com.leike.interceptors; import org.apache.log4j.Logger; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * @description: * @author: leike * @date: 2019-07-22 18:52 */ /** * 方法耗时统计拦截器 */ public class MethodTimerInterceptor implements HandlerInterceptor { private static final Logger LOGGER = Logger.getLogger(MethodTimerInterceptor.class); //前置功能 , 开始 - 结束 , 两个点减法得到耗时 @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { //1 定义开始时间 long start = System.currentTimeMillis(); //2 将其存到请求域当中 request.setAttribute("start",start); // 返回true , 才会找到下一个拦截器 , 如果没有下一个拦截器 , 则去Controller LOGGER.info(request.getRequestURI()+",请求到达"); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // 1取出start long start = (long) request.getAttribute("start"); // 2得到end long end = System.currentTimeMillis(); // 3记录一下耗时 long spendTime = end - start; if (spendTime >= 1000){ LOGGER.warn("方法耗时严重 , 请及时处理,耗时: "+spendTime+"毫秒"); }else { LOGGER.info("方法耗时:"+spendTime+"毫秒,速度正常"); } } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }
配置WebPathInitServlet
package com.leike.constant; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; /** * @description: * @author: leike * @date: 2019-07-12 18:44 */ @WebServlet(urlPatterns = {},loadOnStartup = 2) public class WebPathInitServlet extends HttpServlet { @Override public void init(ServletConfig config) throws ServletException { //在整体应用上下文当中存储了一个ctx的值,用它来引用上下文路径. config.getServletContext().setAttribute("ctx",config.getServletContext().getContextPath()); super.init(config); } }
配置web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <!-- 设置jsp/index.jsp为首页 --> <welcome-file-list> <welcome-file>jsp/index.jsp</welcome-file> </welcome-file-list> <!-- 优先级:监听器->过滤器->拦截器->servlet --> <!-- 指定整个程序上下文信息 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext.xml</param-value> </context-param> <!--注册一个spring启动监听器--> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!--创建一个支持request和response字符编码过滤器--> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <!-- 指定字符编码 --> <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> <!--注册一个支持所有http请求类型的过滤器--> <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> <!-- <context-param>--> <!-- <param-name>log4jConfigLocation</param-name>--> <!-- <param-value></param-value>--> <!-- </context-param>--> <!--注册一个前端控制器DispatcherServlet--> <servlet> <!--这里写的名字是有讲究的 如果我们不去修改spring配置文件默认位置, 那么springmvc他会去web-inf下面找一个叫做springmvc-service.xml的文件--> <servlet-name>ssm_demo</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- <init-param> 可以重新生成配置文件的名字 <param-name>namespace</param-name> <param-value>newSpringmvc-servlet</param-value> </init-param> --> <init-param> <!--上下文配置文件的位置的制定--> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>ssm_demo</servlet-name> <!--这里统一写斜杠--> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
index.JSP
<%-- Created by IntelliJ IDEA. User: leike Date: 2019/7/19 Time: 16:36 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> <title>约建App后台管理系统</title> <%--引入css,否则没样式--%> <link rel="stylesheet" href="${ctx}/static/plugins/layui/css/layui.css"> </head> <body class="layui-layout-body"> <div class="layui-layout layui-layout-admin"> <jsp:include page="common/header.jsp"/> <div class="layui-body"> <!-- 内容主体区域 --> <div style="padding: 15px;">内容主体区域</div> </div> <jsp:include page="common/tail.jsp"/> </div> <script src="${ctx}/static/plugins/layui/layui.js"></script> <script> //JavaScript代码区域 layui.use('element', function(){ var element = layui.element; }); </script> </body> </html>
login.jsp
<%-- Created by IntelliJ IDEA. User: leike Date: 2019/7/25 Time: 19:30 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <form action="${ctx}/user/login" method="post"> 用户名:<input type="text" name="name"><br> 密码:<input type="password" name="password"><br> <input type="submit" value="提交"> <span>${msg}</span> </form> </body> </html>
msg.jsp
<%-- Created by IntelliJ IDEA. User: leike Date: 2019/7/25 Time: 18:57 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <%-- user_name:${user.name}--%> <%-- password:${user.password}--%> Session_username:${SESSION_USER.name} Session_password:${SESSION_USER.password} </body> </html>
showMaster.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%-- Created by IntelliJ IDEA. User: leike Date: 2019/7/19 Time: 17:14 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> <title>layout 后台大布局 - Layui</title> <%--引入css,否则没样式--%> <link rel="stylesheet" href="${ctx}/static/plugins/layui/css/layui.css"> </head> <body class="layui-layout-body"> <div class="layui-layout layui-layout-admin"> <%--引入后台页面头--%> <jsp:include page="/jsp/common/header.jsp"/> <div class="layui-body"> <!-- 内容主体区域 --> <div style="padding: 100px;"> <form action="" method="post"> <table class="layui-table"> <thead> <tr> <th>ID</th> <th>用户名</th> <th>电话</th> </tr> </thead> <tbody> <c:forEach items="${masters}" var="obj"> <tr> <td>${obj.id}</td> <td>${obj.name}</td> <td>${obj.tel}</td> </tr> </c:forEach> </tbody> </table> </form> </div> </div> <div class="layui-footer"> <!-- 底部固定区域 --> © layui.com - 底部固定区域 </div> <jsp:include page="/jsp/common/tail.jsp"/> </div> <script src="${ctx}/static/plugins/layui/layui.js"></script> <script> //JavaScript代码区域 layui.use('element', function(){ var element = layui.element; }); </script> </body> </html>
header.jsp
<%-- Created by IntelliJ IDEA. User: leike Date: 2019/7/19 Time: 17:25 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <div class="layui-header"> <div class="layui-logo">layui 后台布局</div> <!-- 头部区域（可配合layui已有的水平导航） --> <ul class="layui-nav layui-layout-left"> <li class="layui-nav-item"><a href="">控制台</a></li> <li class="layui-nav-item"><a href="">商品管理</a></li> <li class="layui-nav-item"><a href="">用户</a></li> <li class="layui-nav-item"> <a href="javascript:;">其它系统</a> <dl class="layui-nav-child"> <dd><a href="">邮件管理</a></dd> <dd><a href="">消息管理</a></dd> <dd><a href="">授权管理</a></dd> </dl> </li> </ul> <ul class="layui-nav layui-layout-right"> <li class="layui-nav-item"> <a href="javascript:;"> <img src="http://t.cn/RCzsdCq" class="layui-nav-img"> SSM终结者 </a> <dl class="layui-nav-child"> <dd><a href="">基本资料</a></dd> <dd><a href="">安全设置</a></dd> </dl> </li> <li class="layui-nav-item"><a href="${ctx}/jsp/login.jsp">退了</a></li> </ul> </div> <div class="layui-side layui-bg-black"> <div class="layui-side-scroll"> <!-- 左侧导航区域（可配合layui已有的垂直导航） --> <ul class="layui-nav layui-nav-tree" lay-filter="test"> <li class="layui-nav-item layui-nav-itemed"> <a class="" href="javascript:;">所有商品</a> <dl class="layui-nav-child"> <dd><a href="javascript:;">显示大师列表</a></dd> <dd><a href="javascript:;">列表二</a></dd> <dd><a href="javascript:;">列表三</a></dd> <dd><a href="">超链接</a></dd> </dl> </li> <li class="layui-nav-item"> <a href="javascript:;">解决方案</a> <dl class="layui-nav-child"> <dd><a href="javascript:;">列表一</a></dd> <dd><a href="javascript:;">列表二</a></dd> <dd><a href="">超链接</a></dd> </dl> </li> <li class="layui-nav-item"><a href="">云市场</a></li> <li class="layui-nav-item"><a href="">发布商品</a></li> </ul> </div> </div>
tail.jsp
<%-- Created by IntelliJ IDEA. User: leike Date: 2019/7/26 Time: 17:50 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <div class="layui-footer"> <!-- 底部固定区域 --> © layui.com - 底部固定区域 </div>
微信公众号
