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SSM项目小例子，SSM整合图文详细教程
SSM项目小例子
今天来搭建一个SSM项目的小例子简单练一练，那项目模板还是我们那个模板，就是我们在JavaWeb最后的小例子，那到SSM中我们如何实现，后面我们再看看springboot中如何实现
javaweb中项目例子：https://blog.csdn.net/hello_list/article/details/124734814
首先我们来搭建一个SSM项目，同时也是SSM项目整合哦！
web项目创建
环境：idea2019 、maven、jdk1.8
创建一个maven项目，直接next
现在还不是一个web项目
项目右键，选择这个
我们把web勾上
这样就是一个标准的web项目了，比起maven自建的我觉得好看，普普通通的maven项目看起来最顺眼
项目就就创建好了，我们运行下，运行之前我们放个login.jsp页面，随便在网上找了一个页面：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Login</title> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous"> <style> .loginForm { /*边框高度*/ height: 350px; /*边框宽度*/ width: 500px; /*边框颜色*/ border: #4d4d4d solid 1px; /*边框圆角*/ border-radius: 4px; /*阴影 水平方向，竖直方向，模糊距离*/ box-shadow: 5px 5px 5px #4d4d4d; /*上边界距离*/ margin-top: 300px; /*左边界距离：自动*/ margin-left: auto; /*右边界距离：自动*/ margin-right: auto; /*用户名、密码间距*/ padding: 20px 40px; } /*将用户登录置于中间*/ .loginForm h2 { text-align: center; } /*修改button属性*/ .button { text-align: center; vertical-align: middle; } </style> </head> <body> <div class="loginForm"> <h2>用户登录</h2> <form> <div class="form-group"> <label for="exampleInputEmail1">用户名</label> <input type="email" class="form-control" id="exampleInputEmail1" placeholder="请输入用户名"> </div> <div class="form-group"> <label for="exampleInputPassword1">密码</label> <input type="password" class="form-control" id="exampleInputPassword1" placeholder="请输入密码"> </div> <div class="checkbox"> <label> <input type="checkbox"> 同意 <a href="#"> xxx安全协议</a> 与 <a href="#"> xxx隐私协议</a> </label> </div> <div class="button"> <input type="submit" class="btn btn-primary" value="登 录"/> </div> </form> </div> </body> </html>- 1
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打包运行项目，手把手教你，
如果没有打包，自己打个包，我们看到没有lib目录，后面我们项目的依赖不一定会加进来，现在没有依赖，后面可能我们会需要自己建一个，可能你idea不一样，视情况而变
把我们的项目加进来
OK，启动成功
下面我们开始SSM整合，然后开始写例子
SSM整合
万事开头加入依赖：
<dependencies> <!--Junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--数据库驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <!-- 数据库连接池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!--Servlet - JSP --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!--Mybatis--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <!--Spring--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.9.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.9.RELEASE</version> </dependency> </dependencies>- 1
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一定要检查自己的依赖都加进来了
添加一个maven的过滤
<build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build>- 1
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首先我们搭建spring框架：
总配置文件applicationContext.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> </beans>- 1
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我们先spring整合mybatis
database.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/huanying?useSSL=false&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=- 1
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mybatis的配置文件：mybatis-config.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> <typeAliases> <package name="com.xxx.pojo"/> </typeAliases> <mappers> <package name="com.xxx.dao.mapper"/> </mappers> </configuration>- 1
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然后通过spring去接管一下：spring-dao
<?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.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置整合mybatis --> <!-- 1.关联数据库文件 --> <context:property-placeholder location="classpath:database.properties"/> <!-- 2.数据库连接池 --> <!--数据库连接池 dbcp 半自动化操作 不能自动连接 c3p0 自动化操作（自动的加载配置文件 并且设置到对象里面） --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!-- 配置连接池属性 --> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!-- c3p0连接池的私有属性 --> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 关闭连接后不自动commit --> <property name="autoCommitOnClose" value="false"/> <!-- 获取连接超时时间 --> <property name="checkoutTimeout" value="10000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!-- 3.配置SqlSessionFactory对象 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 注入数据库连接池 --> <property name="dataSource" ref="dataSource"/> <!-- 配置MyBaties全局配置文件:mybatis-config.xml --> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 --> <!--解释 ：https://www.cnblogs.com/jpfss/p/7799806.html--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 注入sqlSessionFactory --> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 给出需要扫描Dao接口包 --> <property name="basePackage" value="com.xuerxiriji.dao"/> </bean> </beans>- 1
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我们再直接把service层搞定下：spring-service.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" 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"> <!-- 扫描service相关的bean --> <context:component-scan base-package="com.xuexiriji.service" /> <!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 注入数据库连接池 --> <property name="dataSource" ref="dataSource" /> </bean> </beans>- 1
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OK，接下来我们整合springMVC
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"> <!--DispatcherServlet--> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！--> <param-value>classpath:applicationContext.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> <!--encodingFilter--> <filter> <filter-name>encodingFilter</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> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!--Session过期时间--> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>- 1
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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/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 配置SpringMVC --> <!-- 1.开启SpringMVC注解驱动 --> <mvc:annotation-driven /> <!-- 2.静态资源默认servlet配置--> <mvc:default-servlet-handler/> <!-- 3.配置jsp 显示ViewResolver视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 4.扫描web相关的bean --> <!--其实像这样的扫描，我们完全可以配置一个总的直接就是com.xuexiriji但是我们既然想留下来mybatis和service和controller的层次感就这样 --> <context:component-scan base-package="com.xuexiriji.controller" /> </beans>- 1
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最后都放到我们applicationContext.xml总配置中
<?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"> <import resource="spring-dao.xml"/> <import resource="spring-service.xml"/> <import resource="spring-mvc.xml"/> </beans>- 1
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我们可以看到，配置好的文件idea会自动识别spring小叶子
写了这么多配置文件，项目算是搭好了，但是还没有写代码，下面我们对一个表试试CRUD
表结构，没错啦就是我们在javaweb中的Good货物表
SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for good -- ---------------------------- DROP TABLE IF EXISTS `good`; CREATE TABLE `good` ( `goodid` int(20) NOT NULL AUTO_INCREMENT, `goodname` varchar(20) NOT NULL, `surplus` int(20) NOT NULL, `goodprice` int(20) NOT NULL, PRIMARY KEY (`goodid`) ) ENGINE=InnoDB AUTO_INCREMENT=24 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of good -- ---------------------------- INSERT INTO `good` VALUES ('1', '黑色森林', '2', '15'); INSERT INTO `good` VALUES ('2', '奶油蛋糕', '3', '13'); INSERT INTO `good` VALUES ('3', '水果蛋糕', '2', '11'); INSERT INTO `good` VALUES ('4', '冰淇凌蛋糕', '5', '13'); INSERT INTO `good` VALUES ('9', '牛奶蛋糕', '34', '9'); INSERT INTO `good` VALUES ('11', '肉松蛋糕', '13', '13'); INSERT INTO `good` VALUES ('12', '草莓蛋糕', '99', '23'); INSERT INTO `good` VALUES ('13', '苹果蛋糕', '32', '12'); INSERT INTO `good` VALUES ('14', '香蕉蛋糕', '32', '12'); INSERT INTO `good` VALUES ('15', '火龙果蛋糕', '43', '43'); INSERT INTO `good` VALUES ('16', '香橙蛋糕', '65', '31'); INSERT INTO `good` VALUES ('17', '苹果', '43', '54'); INSERT INTO `good` VALUES ('18', '菠萝', '32', '32'); INSERT INTO `good` VALUES ('19', '橙子', '435', '32'); INSERT INTO `good` VALUES ('20', '花椒', '43', '65'); INSERT INTO `good` VALUES ('21', '大蒜', '23', '54'); INSERT INTO `good` VALUES ('22', '鸡蛋', '32', '43'); INSERT INTO `good` VALUES ('23', '西红柿', '32', '43');- 1
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还有就是javaweb中的展示页面，因为都是jsp所以都一样，所以不改了
我们把index.jsp换成我们的这个
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html lang="zh"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" /> <title>学习日记</title> </head> <body> <!--页面主要内容--> <main class="ftdms-layout-content"> <div style="margin-bottom: 90px;"> <div class="row" style="margin-top: 15px;"> <div class="col-lg-12"> <div class="card"> <div class="card-toolbar clearfix"> <form class="pull-right search-bar" method="post" action="GoodGetSearchServlet" role="form"> <div class="input-group"> <input type="hidden" name="search_field" id="search-field" value="title"> <input type="text" class="form-control col-lg-4" value="${keyword }" name="keyword" placeholder="请输入名称"/> <div class="input-group-btn"> <button class="btn btn-default dropdown-toggle" id="search-btn" type="submit"> 搜索 <!--<span class="caret"></span>--> </button> </div> <!-- <ul class="dropdown-menu"> <li> <a tabindex="-1" href="javascript:void(0)" data-field="title">标题</a> </li> <li> <a tabindex="-1" href="javascript:void(0)" data-field="cat_name">栏目</a> </li> </ul> --> </div> </form> <div class="toolbar-btn-action"> <a class="btn btn-primary m-r-5 submenuitem" href="goodinsert.jsp" data-id="link552" data-index="552"> 新增</a> </div> </div> <div class="card-body"> <div class="table-responsive"> <table class="table table-bordered"> <thead> <tr> <th width="5"><label class="ftdms-checkbox checkbox-primary"> <input type="checkbox" id="check-all"><span></span> </label></th> <th>货物编号</th> <th>货物名称</th> <th>剩余数量</th> <th>货物价格</th> <th>操作</th> </tr> </thead> <tbody> <c:forEach items="${goods}" var="good"> <tr> <td>${good.goodId}</td> <td>${good.goodName}</td> <td>${good.surplus}</td> <td>${good.goodPrice}</td> <td><font class="text-success">正常</font></td> <td> <div class="btn-group"> <div class="toolbar-btn-action"> <a class="btn btn-success m-r-5 submenuitem" href="GoodGetByIdServlet?goodid=${good.goodId}" data-id="link553" data-index="553"><i class="ftsucai-edit-2">编辑</i></a> <a class="btn btn-warning m-r-5 submenuitem" href="GoodDeleteByIdServlet?goodId=${good.goodId}" data-id="link554" data-index="554"><i class="ftsucai-edit-2">删除</i></a> </div> </div> </td> </tr> </c:forEach> </tbody> </table> </div> <ul class="pagination"> <li class="disabled"><span>«</span></li> <li class="active"><span>1</span></li> <li><a class="submenuitem" href="pages_data.html#2">2</a></li> <li><a href="#3">3</a></li> <li><a href="#4">4</a></li> <li><a href="#5">5</a></li> <li><a href="#1">6</a></li> <li><a href="#1">7</a></li> <li><a href="#1">8</a></li> <li class="disabled"><span>...</span></li> <li><a href="#">14452</a></li> <li><a href="#">14453</a></li> <li><a href="#">»</a></li> </ul> </div> </div> </div> </div> </div> </main> <!--End 页面主要内容--> <!-- 新 Bootstrap 核心 CSS 文件 --> <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <!-- jQuery文件。务必在bootstrap.min.js 之前引入 --> <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script> <!-- 最新的 Bootstrap 核心 JavaScript 文件 --> <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> <script> $(function() { $('.search-bar .dropdown-menu a') .click( function() { var field = $(this).data('field') || ''; $('#search-field').val(field); $('#search-btn') .html( $(this).text() + ' <span class="caret"></span>'); }); }); </script> </body> </html>- 1
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一步步来，开始Good.java
package com.xuexiriji.pojo; public class Good { private int goodId; private String goodName; private int surplus; private int goodPrice; public int getGoodId() { return goodId; } public void setGoodId(int goodId) { this.goodId = goodId; } public String getGoodName() { return goodName; } public void setGoodName(String goodName) { this.goodName = goodName; } public int getSurplus() { return surplus; } public void setSurplus(int surplus) { this.surplus = surplus; } public int getGoodPrice() { return goodPrice; } public void setGoodPrice(int goodPrice) { this.goodPrice = goodPrice; } public Good(int goodId, String goodName, int surplus, int goodPrice) { super(); this.goodId = goodId; this.goodName = goodName; this.surplus = surplus; this.goodPrice = goodPrice; } public Good() { super(); } @Override public String toString() { return "Good [goodId=" + goodId + ", goodName=" + goodName + ", surplus=" + surplus + ", goodPrice=" + goodPrice + "]"; } }- 1
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mapper接口：goodDao.java
package com.xuexiriji.dao; import com.xuexiriji.pojo.Good; import java.util.List; public interface GoodDao { public List<Good> selectAllGood(); }- 1
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GoodMapper.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="com.xuexiriji.dao.GoodDao"> <select id="selectAllGood" resultType="Good"> select * from good </select> </mapper>- 1
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service这里我就不面向接口了：GoodService
@Service public class GoodService { @Autowired GoodDao GoodDao; public List<Good> selectAllGood(){ return GoodDao.selectAllGood(); } }- 1
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这里我们看好，只要是被spring接管的都是有小叶子的，而且点击都可以跳过去，如果你没有跳过去，那就是没接管，项目都不用运行，可以去找找错误了
GoodController
@Controller public class GoodController { @Autowired GoodService goodService; @RequestMapping("/selectAllGood") public String selectAllGood(Model model){ List<Good> goods = goodService.selectAllGood(); model.addAttribute("goods",goods); return "index"; } }- 1
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我们一会儿从登录页面进，登录页面表单加上请求路径
启动我们的项目，一下去写这么多中间都没有测试，害，希望不要报错一大堆吧，没有报错启动成功：
果然不出我所料必须报错，说没有这个类，其实看到我就想到，还记得之前启动web项目时候说的吗，lib依赖可能不被加进去，所以我们还得重新打下包
这样这些包就有了
重新启动，欧克，成功启动
点击登录，报错：
这里肯定就是我们的mapper和接口有问题，看下我们的配置，应该是这样的，因为这次我们类名没有起的一直，那就不改了，添加一个mapper.xml记得来这里注册就行
Ok，测试搞定
还可以哈，我差不多，这是我第三次吧，整合这个，其实第一整合完，第二次也就是复制粘贴，这次差不多也是复制的第一次的，所以你自己整合好的一个项目，留好，可能这是你后面项目的基底。
小结
这里打算给大家整合做一个小例子的，今天就先整合到这里吧，等后面再给大家做出来，看到这里了，还不点个赞吗，留个关注也行呀，bye~
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- 原文地址：https://blog.csdn.net/hello_list/article/details/125459464
