小弟编写了一个JAVA程序编译有错误,错误提示是
import javax.servlet.http.*;
^
userTrace.java:3: package javax.servlet.http does not exist
public class userTrace implements javax.servlet.http.HttpSe ^
userTrace.java:12: cannot resolve symbol
symbol : class HttpSessionBindingEvent
location: class ch09.userTrace
public void valueBound(HttpSessionBindingEvent event){
^
userTrace.java:15: cannot resolve symbol
symbol : class HttpSessionBindingEvent
location: class ch09.userTrace
public void valueUnbound(HttpSessionBindingEvent event){着是代码:package ch09;
import javax.servlet.http.*;
public class userTrace implements javax.servlet.http.HttpSessionBindingListener{
private String user_name;
private userList container = userList.getInstance();
public void setUserName(String name){
this.user_name = name;
}
public void valueBound(HttpSessionBindingEvent event){ }
public void valueUnbound(HttpSessionBindingEvent event){
container.removeUser(user_name);
}
}着是代码:
import javax.servlet.http.*;
^
userTrace.java:3: package javax.servlet.http does not exist
public class userTrace implements javax.servlet.http.HttpSe ^
userTrace.java:12: cannot resolve symbol
symbol : class HttpSessionBindingEvent
location: class ch09.userTrace
public void valueBound(HttpSessionBindingEvent event){
^
userTrace.java:15: cannot resolve symbol
symbol : class HttpSessionBindingEvent
location: class ch09.userTrace
public void valueUnbound(HttpSessionBindingEvent event){着是代码:package ch09;
import javax.servlet.http.*;
public class userTrace implements javax.servlet.http.HttpSessionBindingListener{
private String user_name;
private userList container = userList.getInstance();
public void setUserName(String name){
this.user_name = name;
}
public void valueBound(HttpSessionBindingEvent event){ }
public void valueUnbound(HttpSessionBindingEvent event){
container.removeUser(user_name);
}
}着是代码:
解决方案 »
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加载servlet包就可以了。
编译即可!
还要在classpath里一下,再把servlet.jar和jsdk23.jar放在你的工程的lib里这样要是还不行我就没办法了,前提是你的代码绝对正确