java.lang.ClassNotFoundException: com.chat.common.User错误，求大神帮忙看看
public ChatServer()
{
try {
System.out.println("我是服务器在8888监听...");
ServerSocket ss=new ServerSocket(8888);
while(true)
{
Socket s=ss.accept();
//接受客户发来的信息
ObjectInputStream ois=new ObjectInputStream(s.getInputStream());
//User u=(User)ois.readObject();
Object o = ois.readObject();
System.out.println(o.getClass());
User u = (User) o;
System.out.println("服务器接收到的ID："+u.getUserId()+" 密码："+u.getPasswd());
Message m=new Message();
ObjectOutputStream oos=new ObjectOutputStream(s.getOutputStream());
if(u.getPasswd().equals("123456"))
{
m.setMesType("1");
oos.writeObject(m);
}else{
m.setMesType("2");
oos.writeObject(m);
//关闭连接
s.close();
}
}
public boolean sendLoginInfoToServer(Object o)
{
boolean b=false;
try {
System.out.println("正在连接...");
Socket s=new Socket("127.0.0.1",8888);
ObjectOutputStream oos=new ObjectOutputStream(s.getOutputStream());
User u = (User) o;
oos.writeObject(u);
ObjectInputStream ois=new ObjectInputStream(s.getInputStream());
Message ms=(Message)ois.readObject();
if(ms.getMesType().equals("1"))
{
b=true;
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
}
return b;
}
public class User implements Serializable{
private static final long serialVersionUID = 511142319526449270L;
private String userId;
private String passwd;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
public class Message implements java.io.Serializable{
private String mesType;
public String getMesType() {
return mesType;
}
public void setMesType(String mesType) {
this.mesType = mesType;
}
调用
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
System.out.println("OK");
//new ChatFriendList();
//this.dispose();
if(evt.getSource()==jButton2)
{
ChatClientUser chatClientUser=new ChatClientUser();
User u=new User();
u.setUserId(jTextField1.getText().trim());
u.setPasswd(new String(jPasswordField1.getPassword()));
//chatClientUser.checkUser(u);
if(chatClientUser.checkUser(u))
{
new ChatFriendList();
//关闭登陆界面
this.dispose();
}else{
JOptionPane.showMessageDialog(this,"用户名或密码错误!");
}
}
}
错误
java.lang.ClassNotFoundException: com.chat.common.User
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:604)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at com.chat.server.model.ChatServer.<init>(ChatServer.java:23)
at com.chat.server.view.ServerFrame.jb1ActionPerformed(ServerFrame.java:75)
at com.chat.server.view.ServerFrame.access$0(ServerFrame.java:71)
at com.chat.server.view.ServerFrame$1.actionPerformed(ServerFrame.java:41)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6216)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5981)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4583)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4556)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4220)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4150)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
[解决办法]
Message和User是Server 和client共有的方法，你需要在Server 和client建立一个相同的包，比如com.java.comman;而且这个包中的所有方法都是Server 和client共有，所以必须一致。
