javaWeb之servlet路径跳转
2016-10-06 12:40
176 查看
javaWeb之servlet路径跳转
index.jsp:
<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <h1>Servlet路径跳转</h1> <hr> <!-- 使用相对路径访问HelloServlet /servlet/HelloServlet前面的“/”表示服务器的根目录,是不对的 --> <a href="servlet/HelloServlet">访问HelloServlet</a><br> <!-- http://localhost:8080/ServletPathDirection/servlet/HelloServlet --> <!-- 使用绝对路径访问HelloServlet path变量表示项目的根目录--> <a href="<%=path%>/servlet/HelloServlet">访问HelloServlet</a><br> <!-- 表单中action的URL地址的写法与超链接写法一样 --> <a href="servlet/TestServlet">访问TestServlet,跳转到Test.jsp</a> </body> </html>
test.jsp:
<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'test.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <h1>Test.jsp</h1> <hr> </body> </html>
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>ServletPathDirection</display-name> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>HelloServlet</servlet-name> <servlet-class>servlet.HelloServlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>TestServlet</servlet-name> <servlet-class>servlet.TestServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloServlet</servlet-name> <url-pattern>/servlet/HelloServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>TestServlet</servlet-name> <url-pattern>/servlet/TestServlet</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>
HelloServlet.java:
package servlet; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class HelloServlet extends HttpServlet { /** * Constructor of the object. */ public HelloServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=utf-8"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); out.println("<HTML>"); out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); out.println(" <BODY>"); out.println("<h1>你好,我是HElloServlet</h1>"); out.println(" </BODY>"); out.println("</HTML>"); out.flush(); out.close(); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }
TestServlet.java:
package servlet; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class TestServlet extends HttpServlet { /** * Constructor of the object. */ public TestServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //请求重定向方式来提案转到test.jsp,当前路径是ServletPathDirection/servlet //response.sendRedirect("test.jsp");错误 //使用request.getContextPath获得上下文对象 //response.sendRedirect(request.getContextPath()+"/test.jsp");请求重定向 // 服务器内部跳转,这时候的"/"表示项目的根目录 // request.getRequestDispatcher("/test.jsp").forward(request,response); request.getRequestDispatcher("../test.jsp").forward(request,response); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }
相关文章推荐
- 一个解决过程:Servlet [某路径xxx] in web application [/项目xxx] threw load() exception和java.lang.ClassNotFoundException XXX
- JAVA 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- JAVA-servelet 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- 解决servlet在web.xml中的路径跳转问题
- javaweb工程,Servlet里面获取当前WEB跟路径的文件绝对路径地址
- JAVA 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- Servlet & JSP - Java Web 访问资源的路径问题
- JAVA取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- JAVA 取JAVA 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址 得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- javaweb中 ServletActionContext.getServletContext().getRealPath("")获得服务器路径
- JAVA 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- 学习JavaWeb之Servlet的路径映射问题
- JavaWeb_Servlet_应用_路径中文字符处理
- JAVA 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- JAVA 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- Java Servlet Filter实现Web路径和用户日志过滤器
- 【javaweb:servlet】采用重定向实现页面跳转
- java web中jsp与servlet之间的跳转和传递参数
- JAVA 取得当前目录的路径/Servlet/class/文件路径/web路径/url地址
- Java Web 回顾总结(四) - Servlet - 常用路径获取与使用