这个错误是什么意思，怎么处理？重来没见过呀

Question

1、log4j初始化出错。
2、类型转换出错

Answer 1

缺少log4j的jar，好像程序写的也有问题

Answer 2

package com.myEdition.action;import java.sql.SQLException;
import java.util.Map;import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Scope;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.ModelAndView;import com.myEdition.bean.User;
import com.myEdition.dao.UserDAO;
import com.myEdition.dao.impl.UserDAOImpl;
import com.myEdition.domain.Regedit;
import com.myEdition.domain.impl.Regeditlmpl;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("serial")
@Controller("RegeditAction")@Scope("prototype")
public class RegeditAction extends ActionSupport {

//定义接口Regedit
@Resource

private  User user;
private Regeditlmpl RegeditImpl;

private String username;
private String password;
 
 public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
} public String getPassword() {
return password;
} public void setPassword(String password) {
this.password = password;
}

public User getUser(){
return user;
}

public void setUser(User user){
this.user=user;
}

public User reg(String username,String password){
user.setPassword(password);
user.setUsername(username);
return user;
}

public String execute(){
//保存用户提交的信息
User user1 = RegeditImpl.find(user.getPassword(), user.getUsername());
if(user!=null){
Map session=(Map)ActionContext.getContext().getSession();
session.put("user1", user1);
RegeditImpl.saveUser(user);
return "regedit";
//返回页面
}
else return null;

}
/*
public String regedit(){
System.out.println(user.getUsername());
User user1=new User();
user1.setId(user.getId());
user1.setPassword(user.getPassword());
user1.setUsername(user.getUsername());
regedit.saveUser(user1);
return "regedit";
}*/


public Regeditlmpl getRegeditImpl() {
return RegeditImpl;
} public void setRegeditImpl(Regeditlmpl regeditImpl) {
RegeditImpl = regeditImpl;
}


public static void main(String[]args){

ApplicationContext context = new FileSystemXmlApplicationContext("src/applicationContext.xml");
User user2 = new User();
user2.setId(1);
user2.setPassword("456");
user2.setUsername("zzq");
UserDAO userDao = (UserDAO)context.getBean("userDAOProxy");
userDao.insert(user2);
}

}

Answer 3

UserDAO userDao = (UserDAO)context.getBean("userDAOProxy");
你定义的userDAOProxy这个bean的class是UserDAO吗？
如果是，那么你定义的bean在spring配置文件中应该有下面的这条配置：
<bean id="userDAOProxy" class="com.myEdition.dao.UserDAO"></bean>
如果你没有在applicationContext.xml中定义上面的bean，那么你就得代码就需要修改为：
UserDAO userDao = context.getBean(UserDao.class);