jsp的一些问题，救我，大虾们 - Java / Web 开发

Java code:
package friend;
import java.sql.*;
import java.util.*;

public class FriendUtil {
private Connection con;
public FriendUtil()
{
this.con=DataBaseConnection.getConnection();
}



public Collection getAllFriend() throws Exception{

Statement stmt=con.createStatement();
ResultSet rst=stmt.executeQuery("SELECT * from mywork");
Collection ret=new ArrayList();
while(rst.next()){

Friend temFr=new Friend();
temFr.setName(rst.getString("name"));
temFr.setAddress(rst.getString("address"));
temFr.setPhone(rst.getString("phone"));
temFr.setEmail(rst.getString("email"));
temFr.setQq(rst.getString("qq"));
ret.add(temFr);

}
stmt.close();
con.close();
return ret;
}

老提示这些问题：
Collection is a raw type. References to generic type Collection<E> should be parameterized ch8/WebRoot deleteFriend.jsp line 18 1274156616281 200
ArrayList is a raw type. References to generic type ArrayList<E> should be parameterized ch8/src/friend FriendUtil.java line 18 1274153813500 177

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是不是jsp里取得结果用了范型？

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你没有用泛型，就会有提示。
但不是错误吧

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Collection ret=new ArrayList(); 应该