Eclipse编写spring(4.3.9)+springMVC(4.3.9)+Mybatis(3.4.1)/Hibernate(4.3.11)+mysql(5.7)+log4j2项目
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项目说明
项目计划使用spring+springMVC+shiro+log4j2进行简单搭建，并完成增删改查目标，数据访问层采用
mybatis和hibernate两种方式分别与上述环境组合，适应不同的企业开发环境。
eclipse版本（4.6.3）
Eclipse Java EE IDE for Web Developers.
Version: Neon.3 Release (4.6.3)
Build id: 20170314-1500
MySQL版本（5.7.17）
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1552
Server version: 5.7.17-log MySQL Community Server (GPL)
JDK版本（1.8.0_111）
java version “1.8.0_111”
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)
Maven版本（3.5.0）
Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-04T03:39:06+08:00)
Maven home: D:\apache-maven-3.5.0\bin..
Java version: 1.8.0_111, vendor: Oracle Corporation
Java home: C:\Java\jdk1.8.0_111\jre
Default locale: zh_CN, platform encoding: GBK
OS name: “windows 10”, version: “10.0”, arch: “amd64”, family: “windows”
用Maven创建项目注意事项
1、打开eclipse工程的Navigator视图，找到新建maven项目的.settings目录，修改如下：
- 修改org.eclipse.jdt.core.prefs的版本为JDK版本
- 修改org.eclipse.wst.common.project.facet.core.xml版本3.0
- 添加maven项目必须的目录source folder：src/test/resources
- java build path选项source下，四个文件夹要全
- 修改src/test/resources的output folder为test-classes
- 修改libraries的JRE为当前JDK版本
- pom.xml添加javax.servlet-api（或者指定tomcat目录下的server runtime）
（大概就是新建maven项目所需要的流程）
修改完项目编译器版本，动态网站为最新的3.0版本，使用新特性，然后添加maven的四个默认文件
夹，在项目的java build path查看是否有默认的四个文件夹，缺少哪个就添加哪个。同时指定输出文件夹。
JRE版本一定要与JDK版本对应，不然会存在项目报错却找不到错误点的情况。
综上如此，项目基本不会报错了。
2、pom.xml添加jar包
项目必须的jar包如下。 
pom.xml如下
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.wangjikai</groupId> <artifactId>ssm</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.9.RELEASE</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.18</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.3.11.Final</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>4.3.9.RELEASE</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>4.3.9.RELEASE</version> </dependency> <dependency> <groupId>org.mongodb</groupId> <artifactId>mongo-java-driver</artifactId> <version>3.2.2</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-mongodb --> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-mongodb</artifactId> <version>1.10.4.RELEASE</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log配置：Log4j2 + Slf4j --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.2</version> </dependency> <dependency> <!-- 桥接：告诉Slf4j使用Log4j2 --> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-slf4j-impl</artifactId> <version>2.2</version> </dependency> <dependency> <!-- 桥接：告诉commons logging使用Log4j2 --> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-jcl</artifactId> <version>2.2</version> </dependency> <!-- 单元测试包 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.8.1</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.1</version> <scope>provided</scope> </dependency> </dependencies> <build> <finalName>ssm</finalName> </build></project>3、Eclipse编码设置
Eclipse的所有项目编码:
Window->Preferences->General->Workspace->Text file encoding->UTF-8->Apply->OK
项目JSP文件的默认编码
Window->Preferences->Web->JSP Files->Encoding>ISO10646/Unicode(UTF-8)->Apply->OK
项目配置
1、首先是web.xml的配置，它是web项目最先执行的配置文件。
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" metadata-complete="true" version="3.0"> <!-- 项目的基本描述 --> <display-name>Archetype Created Web Application</display-name> <description>spring项目</description> <!-- web项目最先扫描的两个节点之一，加载spring等配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:application-context.xml</param-value> </context-param> <!-- 保证hibernate懒加载不出现异常，service完成之后事务关闭session也会关闭，会出现session异常 --> <filter> <filter-name>openSession</filter-name> <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>openSession</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 编码过滤器 --> <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- springMVC 前端控制器 --> <servlet> <servlet-name>spring_ssm</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:application-web.xml</param-value> </init-param> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring_ssm</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <servlet> <servlet-name>DruidStatView</servlet-name> <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>DruidStatView</servlet-name> <url-pattern>/druid/*</url-pattern> </servlet-mapping> <!-- spring容器的监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 404页面 --> <error-page> <error-code>404</error-code> <location>/errorPages/404error.html</location> </error-page> <!-- 500页面 --> <error-page> <error-code>500</error-code> <location>/errorPages/500error.html</location> </error-page> <!-- 空指针页面 --> <error-page> <exception-type>java.lang.NullException</exception-type> <location>/errorPages/nullParam.html</location> </error-page> <!-- session追踪方式 --> <session-config> <tracking-mode>COOKIE</tracking-mode> </session-config></web-app>2、spring配置文件，application-context.xml（ORM：hibernate）
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"> <!-- spring扫描包，创建beans。但是去除controller的扫描，让springMVC扫描 --> <context:component-scan base-package="com"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 引入mysql/mongo数据库参数文件，用户名密码等信息 --> <context:property-placeholder location="classpath:jdbc.properties" /> <!-- 数据库连接池 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <!-- 数据库连接的基本属性 自动检测驱动 --> <property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <!-- 配置监控统计拦截的filters，去掉后监控界面sql无法统计 --> <property name="filters" value="stat" /> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="1" /> <property name="minIdle" value="10" /> <property name="maxActive" value="20" /> <!-- 配置获取连接等待超时的时间 --> <property name="maxWait" value="60000" /> <!-- 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="300000" /> <property name="validationQuery" value="SELECT 'x'" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <!-- 打开PSCache，并且指定每个连接上PSCache的大小 --> <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="20" /> </bean> <!-- 整合spring与hibernate --> <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- hibernate.cfg.xml配置信息 --> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> </props> </property> <!-- 扫描包含pojo对象注解的包 --> <property name="packagesToScan"> <list> <value>com.domain</value> </list> </property> </bean> <!-- 事务管理器，spring为hibernate适配的 --> <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- 事务的传播特性 --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="save" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="*" propagation="REQUIRED" /> </tx:attributes> </tx:advice> <!-- 哪些类的哪些方法参与事务 --> <aop:config expose-proxy="true"> <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.service.*.*(..))" /> </aop:config></beans>3、springMVC配置文件，application-web.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:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"> <!-- 配置静态页面不拦截策略 --> <mvc:resources location="/errorPages/" mapping="/errorPages/**" /> <!-- 注册springMVC注解功能 --> <mvc:annotation-driven /> <!-- 扫描com包下的包含controller注解的类，不使用默认的filter --> <context:component-scan base-package="com" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- springMVC视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/views/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- 全局异常配置 --> <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="exceptionMappings"> <props> <!-- 表示当抛出NumberFormatException的时候就返回名叫number的视图 --> <prop key="NumberFormatException">/errorPages/defaultError</prop> <prop key="NullPointerException">/errorPages/nullParam</prop> </props> </property> <!-- 表示当抛出异常但没有在exceptionMappings里面找到对应的异常时返回名叫exception的视图 --> <property name="defaultErrorView" value="exception" /> <!-- 定义在发生异常时视图跟返回码的对应关系 --> <property name="statusCodes"> <props> <!-- 表示在发生NumberFormatException时返回视图number，然后这里定义发生异常时视图number对应的HttpServletResponse的返回码是500 --> <prop key="/errorPages/defaultError">500</prop> <prop key="/errorPages/nullParam">405</prop> </props> </property> <!-- 表示在发生异常时默认的HttpServletResponse的返回码是多少，默认是200 --> <property name="defaultStatusCode" value="404" /> </bean></beans>4、log4j2配置文件，log4j2.xml
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html><Configuration status="WARN"> <Appenders> <!-- 输出到控制台 --> <Console name="Console" target="SYSTEM_OUT"> <!-- 拦截器，只允许debug的信息输出 --> <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/> <!-- 输出格式 --> <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %logger{36} - %msg%n" /> </Console> </Appenders> <Loggers> <Root level="fatal"> <AppenderRef ref="Console" /> </Root> <!-- name为具体类所在的包名，所有在com包下的logger都会遵循此logger，additivity避免重复输出 --> <logger name="com" level="info" additivity="false"> <AppenderRef ref="Console"/> </logger> </Loggers></Configuration>5、数据库连接参数，jdbc.properties
useSSL=false 是mysql5.7要求使用更安全的验证方式的体现。
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/wjk?characterEncoding=utf8&useSSL=false
jdbc.username=root
jdbc.password=root
包结构
- | – com
- | – controller(控制层)
- | – service(服务层)
- | – dao(数据访问层)
- | – domain(领域对象)
代码编写
1、domain领域对象–pojo实体类
package com.domain;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name = "user")public class User { @Id @Column(name = "id") @GeneratedValue(strategy = GenerationType.AUTO) private String id; @Column(name = "name") private String name; @Column(name = "age") private String age; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; }}对应的数据库模型：
2、dao数据访问层
package com.dao;import java.io.Serializable;import java.util.List;import javax.annotation.Resource;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.springframework.stereotype.Repository;import com.domain.User;@Repositorypublic class UserSaveDao implements Serializable{ private static final long serialVersionUID = 1L; @Resource private SessionFactory sessionFactory; /** *用户数据保存 */ public void saveUserDao(User user){ getSession().save(user); } /** * 公共获取session方法 * @return */ public Session getSession(){ return sessionFactory.getCurrentSession(); }}3、service数据服务层
package com.service;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Service;import com.dao.MongoSearchDao;import com.dao.UserSaveDao;import com.domain.MongoUser;import com.domain.User;@Servicepublic class UserSaveService { @Resource private UserSaveDao userSaveDao; public void saveUserService(User user) { userSaveDao.saveUserDao(user); }}4、controller控制器层
package com.controller;import javax.annotation.Resource;import org.apache.logging.log4j.LogManager;import org.apache.logging.log4j.Logger;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.servlet.ModelAndView;import com.domain.MongoUser;import com.domain.User;import com.service.UserSaveService;@Controllerpublic class UserSaveController { //日志 private static Logger logger = LogManager.getLogger(UserSaveController.class.getName()); @Resource private UserSaveService usersaveservice; @RequestMapping(value="/") public String aa(){ logger.info("springMVC"); return "index"; } @RequestMapping(value="addUser") public String addUserPage(String name,String age) { logger.info("info level"); // User user = new User();// user.setName(name);// user.setAge(age);// usersaveservice.saveUserService(user); return "addUser"; } @RequestMapping(value="addUser",method=RequestMethod.POST) public String addUser(String add_name,String add_age) { User user = new User(); user.setName(add_name); user.setAge(add_age); usersaveservice.saveUserService(user); return "index"; }}5、前台addUser.jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ page isELIgnored="false"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><c:set var="ctx" value="${pageContext.request.contextPath}" /><!DOCTYPE><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>新增用户</title><script type="text/javascript"> function addUser() { var form = document.forms[0]; form.action = "${ctx}/addUser"; form.method = "post"; form.submit(); }</script></head><body><h2>请填写</h2> <form name="addUserForm"> <a>name</a><input type="text" name="add_name"><br/> <a>age</a><input type="text" name="add_age"><br/> <input type="button" value="确定" onclick="addUser()"></form></body></html>项目大概结构就是这样的，随着业务的不断增加，基本上都是在此结构上增加的。配置文件的代码注释是目前已知的都加上了，方便他人查阅，同时自己做一个备忘。
如果您觉得我写的还不错，就赏脸请杯咖啡吧~(❤ ω ❤)，您的支持是我最大的动力o(￣▽￣)ブ
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