在Ubuntu中编译Servlet返回错误

Question

我正在尝试编译用于WebApp的源代码。我知道Ubuntu中的东西不像Windows中的东西，并且永久设置classpath不是一件好事，所以我决定临时设置该标志。这里是我在终端的命令：

littlejavachild@ubuntu:~/littlejavachild/servletprojects/beerv1$javac-cp“/usr/share/tomcat7/servlet-api.jar”-d classs src/com/example/*.java

我正在努力实现的是:

尽管设置了类路径,但仍会出现错误：

src/com/example/ListenerTester.java:3: error: package javax.servlet does not exist
import javax.servlet.*;
^
src/com/example/ListenerTester.java:4: error: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
src/com/example/ListenerTester.java:7: error: cannot find symbol
public class ListenerTester extends HttpServlet{
                                    ^
  symbol: class HttpServlet
src/com/example/ListenerTester.java:8: error: cannot find symbol
    public void doGet(HttpServletRequest request,
                      ^
  symbol:   class HttpServletRequest
  location: class ListenerTester
src/com/example/ListenerTester.java:9: error: cannot find symbol
                HttpServletResponse response) throws IOException, ServletException {
                ^
  symbol:   class HttpServletResponse
  location: class ListenerTester
src/com/example/ListenerTester.java:9: error: cannot find symbol
                HttpServletResponse response) throws IOException, ServletException {
                                                                  ^
  symbol:   class ServletException
  location: class ListenerTester
src/com/example/MyServletContextListener.java:2: error: package javax.servlet does not exist
import javax.servlet.*;
^
src/com/example/MyServletContextListener.java:4: error: cannot find symbol
public class MyServletContextListener implements ServletContextListener{
                                                 ^
  symbol: class ServletContextListener
src/com/example/MyServletContextListener.java:5: error: cannot find symbol
    public void contextInitialized(ServletContextEvent event){
                                   ^
  symbol:   class ServletContextEvent
  location: class MyServletContextListener
src/com/example/MyServletContextListener.java:12: error: cannot find symbol
    public void contextDestroyed(ServletContextEvent event){
                                 ^
  symbol:   class ServletContextEvent
  location: class MyServletContextListener
src/com/example/ListenerTester.java:14: error: cannot find symbol
        Dog dog = (Dog) getServletContext().getAttribute("dog");
                        ^
  symbol:   method getServletContext()
  location: class ListenerTester
src/com/example/MyServletContextListener.java:6: error: cannot find symbol
        ServletContext sc = event.getServletContext();
        ^
  symbol:   class ServletContext
  location: class MyServletContextListener  

我知道这些错误发生在类路径设置不正确的时候。请帮帮我。告诉我什么是错误的，我如何去纠正它和如何避免它在未来。

[类文件的搜索路径：/usr/lib/jvm/java-7-openjdk-i386/jre/lib/resources.jar,/usr/lib/jvm/java-7-openjdk-i386/jre/lib/rt.jar,/usr/lib/jvm/java-7-openjdk-i386/jre/lib/sunrsasign.jar,/usr/lib/jvm/java-7-openjdk-i386/jre/lib/jsse.jar,/usr/lib/jvm/java-7-openjdk-i386/jre/lib/jce.jar,ipfs.jar,.,/usr/share/tomcat7/servlet-api.jar]

Answer 1

将任务分成几个位，让我们先尝试编译java文件。稍后检查如何移动类文件。

错误确实表示它没有找到所需的类，因此jar没有正确地添加到类路径中。检查这个

javac -classpath .:/usr/share/tomcat7/servlet-api.jar src/com/example/*.java

确保罐子在给定位置。还可以尝试从src文件夹中运行该文件，并给出com/example/*.java的路径