maven專案整合SSM實現登入功能
阿新 • • 發佈：2021-07-08
1、在day01筆記中找建立maven專案的步驟
2、在pom.xml中匯入整合ssm所需要的依賴
<dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <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> <!-- 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>5.1.16</version> </dependency> <!-- JSTL的jar包 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- lombok的jar包 --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.18</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.0.2</version> </dependency>
3、在pom.xml配置載入tomcat的外掛
<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> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> </plugin> </plugins>
4、在web.xml中配置載入Spring和SpringMVC
<?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"> <!-- 當tomcat伺服器一建立application作用域物件時，會自動載入Spring 框架 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml</param-value> </context-param> <welcome-file-list> <welcome-file>login.html</welcome-file> </welcome-file-list> <!-- 配置Spring和Springmvc --> <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>*.do</url-pattern> </servlet-mapping> </web-app>
5、在 src/main/resources 目錄下建立一個spring.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">
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/oa?useUnicode=true&characterEncoding=UTF-8" ></property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="datasource"></property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ws.dao"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactoryBean"></property>
</bean>
<context:component-scan base-package="com.ws"></context:component-scan>
</beans>
6、在在 src/main/resources 目錄下建立一個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">
<context:component-scan base-package="com.hnjd.controller"/>
</beans>
7、實現登入功能
寫前須知，在src目錄下的main資料夾下自行建立
src/main/java:存放專案原始碼的目錄
src/main/resources:存放專案配置檔案的目錄
src/test/java:存放測試程式碼的目錄
src/test/resources:存放測試配置檔案的目錄
src/main/webapp:存放靜態資源的目錄
1、必須完成以上步驟才能繼續往下寫
2、在登入頁面login.html中，點選"點選登入"按鈕，傳送登入請求。
<!-- 約定大於配置 -->
<form action="login.do" method="post">
<div class="logmain">
<h1> </h1>
<div class="logdv">
<span class="logzi">賬 號：</span>
<input name="ename" type="text" id="ename" class="ipt" />
</div>
<div class="logdv">
<span class="logzi">密 碼：</span>
<input name="epass" type="password" id="epass" class="ipt" />
</div>
<div class="logdv">
<p class="logzi"> </p>
<a href="#" class="more">忘記密碼</a>
<input name="" type="checkbox" value="" class="cex"/>記住密碼
</div>
<div class="logdv" style="height:40px;">
<p class="logzi"> </p>
<input type="submit" class="btnbg" value="點選登入" />
</div>
<div>
<a href="#" class="more">註冊</a>
</div>
</div>
</form>
2、寫實體類，此處用到的lombok外掛，詳見lombok講解
package com.hnjd.entity;
import java.sql.Date;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class Employee {
private Integer eid;
private String ename;
private String epass;
private String realname;
private Integer esex;
private Date entrydate;
private Date leavedate;
private Integer position;
private Integer sal;
private Integer estatus;
private Integer did;
private String dname;
}
2、寫dao層介面
package com.hnjd.dao;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import com.hnjd.entity.Employee;
public interface EmployeeDao {
@Select("select employee.*,dname from employee,depart where employee.did=depart.did and ename=#{ename} and epass=#{epass}")
Employee queryAllEmp(@Param("ename")String ename,@Param("epass")String epass);
}
3、寫service層類
package com.hnjd.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.hnjd.dao.EmployeeDao;
import com.hnjd.entity.Employee;
@Service
public class EmployeeService {
@Autowired
private EmployeeDao dao;
public Employee queryAllEmp(String ename,String epass) {
return dao.queryAllEmp(ename, epass);
}
}
4、寫controller層類處理響應請求
package com.hnjd.controller;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.hnjd.entity.Employee;
import com.hnjd.service.EmployeeService;
@Controller
public class EmployeeController {
@Autowired
private EmployeeService service;
@RequestMapping("/login.do")
public String login(String ename,String epass,HttpSession session) {
Employee emp = service.queryAllEmp(ename, epass);
if(emp != null) {
session.setAttribute("emp", emp);
return "/index.jsp";
}else {
return "login.jsp";
}
}
}