超市管理系统总结篇二(准备工作补充)
作者：互联网
1.maven的pom.xml导入所需的依赖
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.xia</groupId>
<artifactId>smbms</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>smbms Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</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>2.3.3</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl-api -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency>
<!-- 阿里JSON-->
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.41</version>
</dependency>
</dependencies>
<build>
<finalName>smbms</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
2.在web.xml中注册servlet
<?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"
metadata-complete="true">
<!--配置web应用的初始化 参数-->
<context-param>
<param-name>url</param-name>
<param-value>jdbc:mysql://3306:mysql</param-value>
</context-param>
<filter>
<filter-name>Encoding</filter-name>
<filter-class>com.xia.filter.CharacterEncoding</filter-class>
</filter>
<filter-mapping>
<filter-name>Encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>SysFilter</filter-name>
<filter-class>com.xia.filter.SysFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SysFilter</filter-name>
<url-pattern>/jsp/*</url-pattern>
</filter-mapping>
<!-- //设置欢迎界面-->
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
<!-- 登录-->
<servlet>
<servlet-name>UserServlet</servlet-name>
<servlet-class>com.xia.servlet.UserServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UserServlet</servlet-name>
<url-pattern>/login.do</url-pattern>
</servlet-mapping>
<!-- 注销用户-->
<servlet>
<servlet-name>Loginout</servlet-name>
<servlet-class>com.xia.servlet.Loginout</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Loginout</servlet-name>
<url-pattern>/jsp/logout.do</url-pattern>
</servlet-mapping>
<!-- 修改密码-->
<servlet>
<servlet-name>PwdServlet</servlet-name>
<servlet-class>com.xia.servlet.PwdServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>PwdServlet</servlet-name>
<url-pattern>/jsp/user.do</url-pattern>
</servlet-mapping>
<!-- 默认session过期时间-->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
</web-app>
3.过滤器，编码预处理，注销后拦截
package com.xia.filter;
import javax.servlet.*;
import java.io.IOException;
public class CharacterEncoding implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
servletRequest.setCharacterEncoding("utf-8");
servletResponse.setCharacterEncoding("utf-8");
filterChain.doFilter(servletRequest,servletResponse);
}
@Override
public void destroy() {
}
}
package com.xia.filter;
import com.xia.util.Constants;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class SysFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest servletRequest1 = (HttpServletRequest) servletRequest;
HttpServletResponse servletResponse1 = (HttpServletResponse) servletResponse;
if (servletRequest1.getSession().getAttribute(Constants.USER_SESSION) == null) {
servletResponse1.sendRedirect(servletRequest1.getContextPath()+"/login.jsp");
}
filterChain.doFilter(servletRequest,servletResponse);
}
@Override
public void destroy() {
}
}
标签：总结,xia,管理系统,servlet,超市,public,jsp,com,javax 来源： https://www.cnblogs.com/xiaxiaopi/p/14429460.html