使用maven 创建web项目 + 搭建SSM框架

1、右键-new --project - maven project

2、选中默认workspace

3、选择 webapp（创建web项目）

4、设置项目名称

5、创建成功。出错是正常的，现在目录不完整，需要补齐目录

各个目录的作用

6、补全目录

选择 src-main -右击-new-folder-java

选择 src -右击--new-folder-test

选择 src- test - -右击-new-folder-java

选择 src- test - -右击-new-folder-resources

四个文件夹建完，如图

7、更新。在项目上右击--maven--update project之后，生成test/resources目录

8、选择要更新的项目，点完成

9、至此项目建成，jsp页面出错的原因是因为缺少相关jar包。

10、在pom.xml中添加jar，这里把ssm相关的jar包也直接添加了

<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.hp</groupId>
  <artifactId>MavenSSM</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>MavenSSM Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
   <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.4</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- Spring的jar包 SpringMVC的jar包 Mybatis的jar包 
        Spring整合mybatis的jar包 Spring整合SpringMVC的jar包 
            mysql的jar包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.44</version>
        </dependency>

        <!-- 把list集合转换成json数据的jar包 -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>

        <!-- FastDFS 文件上传 -->
        <!-- <dependency> <groupId>com.github.tobato</groupId> <artifactId>fastdfs-client</artifactId> 
            <version>1.26.4</version> </dependency> -->

        <!-- 文件上传下载 -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>

        <!-- 画图 -->
        <dependency>
            <groupId>org.jfree</groupId>
            <artifactId>jcommon</artifactId>
            <version>1.0.24</version>
        </dependency>
        <dependency>
            <groupId>org.jfree</groupId>
            <artifactId>jfreechart</artifactId>
            <version>1.0.19</version>
        </dependency>
        <!-- c3p0连接池jar包 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5-pre10</version>
        </dependency>

<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.1.2</version>
</dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <configuration>
                    <version>3.0</version>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <!-- 配置文件地址 -->
                    <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

11、再次更新项目。在项目上右击--maven--update project之后，整个工程无错误。项目创建ok。

12、开始搭建ssm环境。因为之前已经导入过ssm相关的jar了，所以，现在直接配置xml文件。

web.xml

<?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"
    id="WebApp_ID" version="3.0">
    <display-name>Archetype Created Web Application</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 所有以/结尾的请求，都交给Spring MVC处理 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--配置POST请求中⽂乱码过滤器 -->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>
            org.springframework.web.filter.CharacterEncodingFilter
        </filter-class>
            <!--指定编码 -->
            <init-param>
                <param-name>encoding</param-name>
                <param-value>UTF-8</param-value>
            </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

在java/resources目录创建这几个文件

springmvc.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
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 开启注解扫描，扫描com.hp.controller下的所有@Controller类的注解 -->
    <context:component-scan base-package="com.hp.controller" />

    <!--释放静态资源 -->
    <mvc:default-servlet-handler />
    <!--开启mvc注解⽀持 -->
    <mvc:annotation-driven />
    <!--自定义视图解析器 -->
    <bean id="viewresolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 默认编码 -->
        <property name="defaultEncoding" value="utf-8" />
        <!-- ⽂件⼤⼩最⼤值 -->
        <property name="maxUploadSize" value="10485760000" />
        <!-- 内存中的最⼤值 -->
        <property name="maxInMemorySize" value="40960" />
    </bean>
    <mvc:interceptors>
        <mvc:interceptor>
            <!-- 指定当前拦截器拦截的路径 -->
            <mvc:mapping path="/**" />
            <!-- 指定当前拦截器不需要拦截的路径 -->
            <mvc:exclude-mapping path="/login" />
            <mvc:exclude-mapping path="/css/**" />
            <mvc:exclude-mapping path="/js/**" />
            <!-- 自定义拦截器 -->
            <bean class="com.hp.interceptor.PowerValidateInterceptor" />
        </mvc:interceptor>
    </mvc:interceptors>
</beans>

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" 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/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"
    >
    <!-- 扫描注解 只会扫描这个包里面有@service注解的类 -->
    <context:component-scan base-package="com.hp.service"></context:component-scan>
    <!-- 加载属性文件 -->
    <context:property-placeholder location="classpath:db.properties" />
    <!--数据源 -->
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    <!-- 创建sqlsessionFactory -->
    <bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="typeAliasesPackage" value="com.hp.pojo">
        </property>
        <!-- 如果还有⼀些专⻔针对于mybatis的配置，需要引⼊ -->
        <property name="configLocation" value="classpath:mybatis.xml" />
    </bean>
    <!-- 创建扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.hp.mapper"></property>
        <property name="sqlSessionFactoryBeanName" value="factory"></property>
    </bean>
</beans>

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>
    <settings>
        <!-- 设置延迟加载开关，默认false（⽴即加载） -->
        <setting name="lazyLoadingEnabled" value="false" />
        <!-- 开启MyBatis⼆级缓存配置，默认已经开启，可以省略 -->
        <setting name="cacheEnabled" value="true" />
        <!-- 设置驼峰命名规则,会将表字段名user_name⾃动映射到属性名userName -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>
    <plugins>
    <!-- 分页查询工具pagehelper -->
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
            <property name="properties" value="mysql" />
        </plugin>
    </plugins>
</configuration>

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/oasys
jdbc.username=root  
jdbc.password=xy1234

登录测试

1、login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<link href="css/bootstrap.min.css"  rel="stylesheet">
<link href="css/toastr.min.css"  rel="stylesheet">
<script src="js/jquery-1.9.1.js" type="text/javascript"></script>
<script src="js/toastr.min.js" type="text/javascript"></script>
<script type="text/javascript">
function submit(){
    if($('#username').val()==""){
        toastr.info("用户名不能为空")
        return false;
    }
    if($('#pwd').val()==""){
        toastr.info("密码不能为空")
        return false;
    }
    $.ajax({
        url:"login",
        data:{"name":$('#username').val(),"pwd":$('#pwd').val()},
        dataType:"json",
        success:function (result){
            if(result==1){
                toastr.success("登录成功")
            }else{
                toastr.error("登录失败")
            }
        }
    })
}
</script>
</head>
<body>
用户名：<input type="text"  id="username"><br>
密码：<input type="text"  id="pwd"><br>
<button onclick="submit()">登录</button>
</body>
</html>

2.后台代码

 
　1 @Controller
  2 public class LoginController {
  3 
  4     @Autowired
  5     private LoginService loginservice;
  6 
  7     @RequestMapping("login")
  8     @ResponseBody
  9     public int login(String name, String pwd,HttpSession session) {
 10         User user = loginservice.login(name, pwd);
 11         if (user != null) {
 12             session.setAttribute("LOGIN_USER", user);
 13             return 1;
 14         } else {
 15             return 0;
 16         }
 17     }
 18 }
 19 
 20 
 21 public interface LoginService {
 22 
 23     public User login(String name, String pwd);
 24 }
 25 
 26 
 27 @Service
 28 public class LoginServiceImpl implements LoginService {
 29 
 30     @Autowired
 31     private LoginMapper loginMapper;
 32 
 33     @Override
 34     public User login(String name, String pwd) {
 35         return loginMapper.login(name, pwd);
 36     }
 37 
 38 }
 39 
 40 public class User {
 41     private int id; 43     private String uame;
 44     private String upwd;
 45     private int role;
 46     private String sex; 50 
 51     public int getId() {
 52         return id;
 53     }
 54 
 55     public void setId(int id) {
 56         this.id = id;
 57     }
 67     public String getUame() {
 68         return uame;
 69     }
 70 
 71     public void setUame(String uame) {
 72         this.uame = uame;
 73     }
 74 
 75     public String getUpwd() {
 76         return upwd;
 77     }
 78 
 79     public void setUpwd(String upwd) {
 80         this.upwd = upwd;
 81     }
 82 
 83     public int getRole() {
 84         return role;
 85     }
 86 
 87     public void setRole(int role) {
 88         this.role = role;
 89     }
 90 
 91     public String getSex() {
 92         return sex;
 93     }
 94 
 95     public void setSex(String sex) {
 96         this.sex = sex;
 97     }122 }
123 
124 public interface LoginMapper {
125 
126     @Select("select * from users where uame=#{uame} and upwd=#{upwd}")
127     User login(@Param("uame") String name, @Param("upwd") String pwd);
128 }
129 
130 
131 
132 public class PowerValidateInterceptor extends HandlerInterceptorAdapter{
133 
134     @Override
135     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
136             throws Exception {
137         HttpSession session = request.getSession();
138         Object user = session.getAttribute("LOGIN_USER");
139         System.out.println("拦截路径："+request.getRequestURL());
140         if(user!=null){
141             return super.preHandle(request, response, handler);
142         }else{
143             response.sendRedirect(request.getContextPath()+"/index.jsp");
144             return false;
145         }
146     }
147 }

启动项目。第一次使用 5 maven build... ，输入启动参数 tomcat7:run 之后直接运行 4 maven build

正常启动项目。在浏览器里面输入地址，进行测试

完成！！！！！

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原文地址：https://www.cnblogs.com/studyxu/p/13558881.html