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@ -21,76 +21,29 @@
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1. **创建项目**
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- 使用IntelliJ IDEA创建一个新的Java项目。
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- 根据servlet项目要求,创建目录和文件。
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```markdown
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project_name
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|-- src
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|-- webapp
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|-- WEB-INF
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|-- classes
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|-- (源码编译后的class文件)
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|-- lib
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|-- (第三方库的jar文件)
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|-- web.xml
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|-- index.jsp
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|-- other.jsp
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|-- css
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|-- style.css
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|-- js
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|-- script.js
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|-- images
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|-- logo.png
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```
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- 在IDEA中对项目进行必要的设置,例如:JDK版本、class文件输出路径等。
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2. **编写登录页面 (`login.jsp`和`welcome.jsp`)**
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2. **编写登录页面 (`login.jsp`)**
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3. **创建Servlet (`LoginServlet.java`)**
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4. **配置Servlet (`web.xml`)**
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns="http://xmlns.jcp.org/xml/ns/javaee"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
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id="WebApp_ID" version="3.1">
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<servlet>
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<servlet-name>com.lk.webapp.servlets.LoginServlet</servlet-name>
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<servlet-class>com.lk.webapp.servlets.LoginServlet</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>com.lk.webapp.servlets.LoginServlet</servlet-name>
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<url-pattern>/LoginServlet</url-pattern>
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</servlet-mapping>
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</web-app>
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```
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5. **部署项目**
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- 将项目导出为WAR文件。
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在idea中,打开控制台:
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```shell
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cd webapp
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jar cvf my.war -C . .
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jar cvfm my.war MANIFEST.MF -C . .
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```
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- 安装Tomcat。
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https://tomcat.apache.org/download-90.cgi
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- 将my.war文件放置在Tomcat的`webapps`目录下。
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- 启动Tomcat
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```shell
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cd <自己的tomcat解压所在的目录/bin>
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.\startup.bat
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```
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- 将WAR文件放置在Tomcat的`webapps`目录下。
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- 重启Tomcat。
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6. **测试**
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- 访问 `http://localhost:8080/my/login.jsp`。
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- 输入用户名和密码,提交表单
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- 输入用户名和密码,提交表单。
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- 观察不同的情况下的响应结果。
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#### 扩展任务
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- **使用JavaBean**: 创建一个`User`类来封装用户名和密码,并在Servlet中使用这个类。
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2
examples/chapter04/MANIFEST.MF
Normal file
2
examples/chapter04/MANIFEST.MF
Normal file
@ -0,0 +1,2 @@
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Manifest-Version: 1.0
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Created-By: openjdk 11.0.23
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@ -8,7 +8,7 @@ import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.PrintWriter;
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//@WebServlet("/Login2Servlet")
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@WebServlet("/Login2Servlet")
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public class Login2Servlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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@ -11,7 +11,7 @@ import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.PrintWriter;
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//@WebServlet("/Login3Servlet")
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@WebServlet("/Login3Servlet")
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public class Login3Servlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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@ -7,7 +7,7 @@ import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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//@WebServlet("/LoginServlet")
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@WebServlet("/LoginServlet")
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public class LoginServlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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34
examples/chapter04/web.xml
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34
examples/chapter04/web.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns="http://xmlns.jcp.org/xml/ns/javaee"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
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id="WebApp_ID" version="3.1">
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<servlet>
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<servlet-name>com.lk.webapp.servlets.LoginServlet</servlet-name>
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<servlet-class>com.lk.webapp.servlets.LoginServlet</servlet-class>
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</servlet>
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<servlet>
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<servlet-name>com.lk.webapp.servlets.Login2Servlet</servlet-name>
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<servlet-class>com.lk.webapp.servlets.Login2Servlet</servlet-class>
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</servlet>
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<servlet>
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<servlet-name>com.lk.webapp.servlets.Login3Servlet</servlet-name>
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<servlet-class>com.lk.webapp.servlets.Login3Servlet</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>com.lk.webapp.servlets.LoginServlet</servlet-name>
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<url-pattern>/LoginServlet</url-pattern>
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</servlet-mapping>
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<servlet-mapping>
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<servlet-name>com.lk.webapp.servlets.Login2Servlet</servlet-name>
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<url-pattern>/Login2Servlet</url-pattern>
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</servlet-mapping>
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<servlet-mapping>
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<servlet-name>com.lk.webapp.servlets.Login3Servlet</servlet-name>
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<url-pattern>/Login3Servlet</url-pattern>
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</servlet-mapping>
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</web-app>
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