servlet环境搭建问题：
如下
- Java code
package test;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;public class HelloWorld extends HttpServlet{public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{ response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<html><head><title>"); out.println("This is my first Servlet"); out.println("</title></head><body>"); out.println("<h1>Hello,World!</h1>"); out.println("</body></html>"); }}在DOS中用JAVAC编译报错：
error:C:\apache-tomcat-6.0.35\lib\servlet-api.jar<javax/servlet/http/HttpServlet.class>中的类文件格式无效。 wrong version:49,expected 45
HelloWorld.java:8:未找到 class test.HelloWorld 的父类 javax.servlet.http.HttpServlet。
2 个错误
C:\apache-tomcat-6.0.35\lib\servlet-api.jar与
C:\Program Files (x86)\Java\jre6\lib\ext\servlet-api.jar都是有的，环境变量classpath也加了C:\apache-tomcat-6.0.35\lib\servlet-api.jar
------解决方案--------------------
试过可以编译，可能是jar包的问题
------解决方案--------------------
要正确的配置servlet-api.jar(该jar包在Tomcat安装目录下有，如:C:\Tomcat 5.5\common\lib\servlet-api.jar)。可用把该jar包复制到虚拟目录/WEB-INF/classes/lib目录(如果没有此目录就手动创建,如:D:\webstudy\WEB-INF\lib\servlet-api.jar),然后再编译。
- Java code
package org.xiong.servletdemo;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 ServletDemo extends HttpServlet{ public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<html><head><title>"); out.println("This is my first Servlet"); out.println("</title></head><body>"); out.println("<h1>Hello,World!</h1>"); out.println("</body></html>"); } public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException { this.doGet(request,response); }}
------解决方案--------------------
javac -cp jar路径 *.java
------解决方案--------------------
tomcat似乎需要配置java_home。 配置了吗？