SSM框架搭建之maven方式(二)

2024-12-03 技术教程

一、MAVEN下载安装

maven的下载地址：http://maven.apache.org/download.cgi

解压之后路径 D:\java\apache-maven-3.6.2;
新增系统变量【MAVEN_HOME】，变量名替换成自己本地解压路径

系统变量【Path】追加值：%MAVEN_HOME%\bin

运行cmd，输入mvn –version或者mvn –v；如果看见下图则说明maven安装配置完毕

本地仓储配置文件：D:\java\apache-maven-3.6.2\conf\settings.xml
在maven目录下创建本地存储文件夹repository，设置本地存储路径 D:\java\apache-maven-3.6.2\repository

<localRepository>D:\java\apache-maven-3.6.2\repository</localRepository>

直接访问maven<localRepository>D:\java\apache-maven-3.6.2\repository</localRepository>公共仓库的速度比较慢，所以推荐使用阿里的maven仓库镜像，在mirrors节点下，新增如下内容

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

设置默认jdk，在profiles节点下，新增如下内容(可以省略，在pom.xml配置也行)

<profile> <id>nexus</id> <repositories> <repository> <id>central</id> <url>http://repo.maven.apache.org/maven2</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> <repository> <id>ansj-repo</id> <name>ansj Repository</name> <url>http://maven.nlpcn.org/</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> </profile>

二、MAVEN配置

Maven项目目录结构
|----src
| |----main
| | |----java —— java文件
| | |----resource ——资源文件
| | |----webapp ——jsp/html/css/image/js文件
| |----test
| | |----java ——测试java文件
| | |----resource ——资源文件
|----target ——项目输出位置
|----pom.xml ——maven项目的标志

eclipse设置Maven
在Window----Preferences中找到Maven节点----User Setting，设置如下图：

点击Installations节点，添加maven runtime如下图所示

三、eclipse创建Maven工程

点击File----New----Maven Project(默认有的话)或者File----New----Other，选择maven文件夹，点击Maven Project如下图所示

点击Next，选择默认工作空间位置，选择web类型，再点击Next

填写GroupID、ArtifactID，点击Finish完成maven项目web工程的创建
Group ID：相当于一个组织
Artifact ID：相当于这个组织下的一个具体项目
Packege：根据Group ID和Artifact ID生成一个默认的名称

四、配置的修改

在项目上右键，查看项目信息，默认的Dynamic Web Module为2.3，使用Tomcat 8.5，需要修改为3.1

(1).找到maven工程所在目录下org.eclipse.wst.common.project.facet.core.xml此文件

(2).maven工程下的web.xml文件替换为

<?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_3_1.xsd" version="3.1" metadata-complete="true"></web-app>

(3).pom.xml文件中修改build节点，添加如下内容

<plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins>

(4).在项目上右键，找到Maven属性下的Update Project

(5).选择该项目进行更新，如果怕不能强制更新，可以勾选Force Update of Snapshots/Releases，更新完毕再一次查看Dynamic Web Module是否为3.1

右键项目--Properties--Deployment Assembly，移除target

五、案例测试

目录结构

Pom.xml再添加如下内容

<properties> <srping.version>4.0.2.RELEASE</srping.version> <mybatis.version>3.2.8</mybatis.version> <slf4j.version>1.7.12</slf4j.version> <log4j.version>1.2.17</log4j.version> </properties> <dependencies>  <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.apache.geronimo.bundles</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8_2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${srping.version}</version> </dependency>   <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.2</version> </dependency>   <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.17</version> </dependency>  <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency>  <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency>  <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency>    <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.6</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency>  <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency>  <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency>  <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> <scope>provided</scope> </dependency> </dependencies>

2.datasource.properties
mysql8的驱动名称不是~~com.mysql.jdbc.Driver~~；格外注意url的写法

datasource.driverClassName=com.mysql.cj.jdbc.Driverdatasource.userName=rootdatasource.userPassword=123456datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC

3. 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.ConsoleAppenderlog4j.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.PatternLayoutlog4j.appender.Console.layout.ConversionPattern=[%c]-%m%n#mybatis显示SQL语句日志配置 net.cxp.blog.dao是你的dao接口所在的包名 #log4j.logger.org.mybatis=DEBUGlog4j.logger.com.lymn.it.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log4j.appender.File.File=d:/logs/ssm.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DEBUG以上级别日志log4j.appender.File.Threshold=DEBUGlog4j.appender.File.layout=org.apache.log4j.PatternLayoutlog4j.appender.File.layout.ConversionPattern=[%p][%d{yyyy-MM-dd HH\:mm|\:ss}][%c]%m%n

4. spring-mvc.xml

5.spring-mybatis.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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:task="http://www.springframework.org/schema/task" 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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">  <context:component-scan base-package="com.lymn.it.*"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan>    <context:property-placeholder location="classpath:datasource.properties" />  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="${datasource.driverClassName}"></property> <property name="url" value="${datasource.url}"></property> <property name="username" value="${datasource.userName}"></property> <property name="password" value="${datasource.userPassword}"></property> </bean>  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  <property name="typeAliasesPackage" value="com.lymn.it.model"></property>   <property name="dataSource" ref="dataSource" />  <property name="mapperLocations" value="classpath:com/lymn/it/mapper/*.xml"></property> </bean>  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.lymn.it.mapper" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean>  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean>  <tx:advice id="tx" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="select*" read-only="true" /> <tx:method name="find*" read-only="true" /> <tx:method name="get*" read-only="true" /> <tx:method name="has*" read-only="true" /> <tx:method name="count*" read-only="true" /> <tx:method name="search*" read-only="true" /> </tx:attributes> </tx:advice> <aop:config> <aop:pointcut id="pc" expression="execution(* com.lymn.it.service.impl..*.*(..))" />  <aop:advisor pointcut-ref="pc" advice-ref="tx" /> </aop:config></beans>

6.model--User

package com.lymn.it.model;public class User { private Integer userid; private String username; private String password; private String email; private String phone; private Integer status; private String code; public Integer getUserid() { return userid; } public void setUserid(Integer userid) { this.userid = userid; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public Integer getStatus() { return status; } public void setStatus(Integer status) { this.status = status; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } @Override public String toString() { return "User [userid=" + userid + ", username=" + username + ", password=" + password + ", email=" + email + ", phone=" + phone + ", status=" + status + ", code=" + code + "]"; }}

7.mapper-UserMapper.java

package com.lymn.it.mapper;import java.util.List;import com.lymn.it.model.User;public interface UserMapper { public List<User> getAllUsers(); public User getUserById(int userid); public boolean deleteUserById(int userid); public boolean insertUser(User user); public boolean updateUserById(User user);}

mapper-UserMapper.java

<?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.lymn.it.mapper.UserMapper"> <select id="getAllUsers" resultType="User"> SELECT * FROM user </select> <select id="getUserById" parameterType="int" resultType="User"> SELECT * FROM user WHERE userid = #{userid} </select> <insert id="insertUser" parameterType="User" useGeneratedKeys="true" keyProperty="userid"> INSERT INTO s_user(username,password,email,phone) VALUES(#{username},#{password},#{email},#{phone}) </insert> <update id="updateUserById" parameterType="User"> UPDATE user SET username = #{username}, password = #{password}, email = #{email}, phone = #{phone} WHERE userid = #{userid} </update> <delete id="deleteUserById" parameterType="int"> DELETE FROM user WHERE userid = #{userid} </delete></mapper>

8.service-UserService.java

package com.lymn.it.service;import java.util.List;import com.lymn.it.model.User;public interface UserService { public List<User> getAllUsers(); public User getUserById(int userid); public boolean deleteUserById(int userid); public boolean insertUser(User user); public boolean updateUserById(User user);}

service-UserServiceImpl.java

package com.lymn.it.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.lymn.it.mapper.UserMapper;import com.lymn.it.model.User;import com.lymn.it.service.UserService;@Servicepublic class UserServiceImpl implements UserService { @Autowired UserMapper userMapper; @Override public List<User> getAllUsers() { return userMapper.getAllUsers(); } @Override public User getUserById(int userid) { return userMapper.getUserById(userid); } @Override public boolean deleteUserById(int userid) { return userMapper.deleteUserById(userid); } @Override public boolean insertUser(User user) { return userMapper.insertUser(user); } @Override public boolean updateUserById(User user) { return userMapper.updateUserById(user); }}

9.controller-UserController

package com.lymn.it.controller;import java.util.List;import java.util.Map;import org.apache.log4j.Logger;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import com.lymn.it.model.User;import com.lymn.it.service.UserService;@Controllerpublic class UserController { @Autowired UserService userService; Logger logger=Logger.getLogger(UserController.class); @RequestMapping(value="/user") public String user(Map<Object,Object> map) { logger.info("查询所有用户数据"); List<User> userList = userService.getAllUsers(); map.put("user", userList); logger.info("查询完毕，返回页面"); return "user"; }}

10.web.xml添加如下配置

<context-param> <param-name>contextConfigLocation</param-name>  <param-value> classpath:spring-mybatis.xml </param-value> </context-param>  <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>  <servlet> <servlet-name>spring-mvc</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>spring-mvc</servlet-name>  <url-pattern>/</url-pattern> </servlet-mapping>  <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener>  <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>

11.jsp/user.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html><html><head><meta charset="UTF-8"><title>User</title></head><body> <h2>${requestScope.user}</h2></body>

12.建数据库test，然后在创建表

CREATE TABLE `user` ( `userid` INT(11) NOT NULL AUTO_INCREMENT, `username` VARCHAR(255) DEFAULT NULL, `password` VARCHAR(255) DEFAULT NULL, `email` VARCHAR(255) DEFAULT NULL, `phone` VARCHAR(255) DEFAULT NULL, `status` VARCHAR(255) NOT NULL DEFAULT '0', `code` VARCHAR(255) DEFAULT NULL, PRIMARY KEY (`userid`)) ENGINE=INNODB AUTO_INCREMENT=16 DEFAULT CHARSET=utf8;

13.项目部署
配置 Tomcat 访问权限，tomcat中tomcat-user.xml的配置(tomcat根目录/conf/tomcat-users.xml)

<role rolename="manager-gui"/> <role rolename="manager-script"/><role rolename="manager-jmx"/><role rolename="manager-status"/><user password="123456" username="root"roles="manager-gui,manager-script,manager-jmx,manager-status" />

双击 tomcat 解压包中 bin 目录下的 startup.bat 命令进行启动Tomcat服务器。在浏览器地址来中进行访问http://127.0.0.1:8080/manager/

输入用户名root，密码123456进行登录，如果顺利则请进入下一步。

配置maven的setting.xml
在 conf/setting.xml 文件中的标签 <servers> 添加如下内容

<server>  <id>tomcat8</id>  <username>root</username> <password>123456</password> </server>

在 pom.xml 文件的plugins子节点中添加如下内容

<plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <url>http://127.0.0.1:8080/manager/text</url>  <server>tomcat8</server> <username>root</username> <password>123456</password>  <path>/ssm01</path> <update>true</update> </configuration> </plugin>

先运行Tomcat目录下/bin/startup.bat
然后右击项目Run As–Maven build，在Goals中输入：clean install tomcat7:redeploy

访问如下图表示配置成功

附：maven命令
执行命令
1）Run as → clean install
2）Run as → tomcat7:deploy 注：第1次部署执行
3）Run as → tomcat7:redeploy 注：第2次或以后需要重新发布执行
4）Run as → tomcat7:run 注：部署到 tomcat 中启动

在此过程中遇到的错误

启动tomcat，在进行编译构建

用Mybatis去操作底层数据库的时候，需要用到xml配置文件，一般我们是把配置文件和dao放置在同一层目录。操作maven项目的时候，我们可能会遇到无法读取到dao对应的mapper.xml文件。在pom.xml的build节点中添加如下内容

<resources> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> </resource></resources>或者<plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>build-helper-maven-plugin</artifactId> <version>1.8</version> <executions> <execution> <id>add-resource</id> <phase>generate-resources</phase> <goals> <goal>add-resource</goal> </goals> <configuration> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> </configuration> </execution> </executions> </plugin> 再或者<plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>build-helper-maven-plugin</artifactId> <version>1.8</version> <executions> <execution> <id>add-resource</id> <phase>generate-resources</phase> <goals> <goal>add-resource</goal> </goals> <configuration> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> </configuration> </execution> </executions></plugin>