struts2权威指南第5章第5.3-5.6

package lee; import java.util.Map; import ognl.DefaultTypeConverter; import org.apache.struts2.util.StrutsTypeConverter; import java.util.List; import java.util.ArrayList; /** * @author yeeku.H.lee kongyeeku@163.com * @version 1.0 * <br>Copyright (C), 2005-2008, yeeku.H.Lee * <br>This program is protected by copyright laws. * <br>Program Name: * <br>Date: */ public class UserConverter extends StrutsTypeConverter { public Object convertFromString(Map context, String[] values, Class toClass) { if (values.length > 1) { List<User> result = new ArrayList<User>(); for (int i = 0; i < values.length ; i++ ) { User user = new User(); String[] userValues = values[i].split(","); user.setName(userValues[0]); user.setPass(userValues[1]); result.add(user); } return result; } else { User user = new User(); String[] userValues = values[0].split(","); user.setName(userValues[0]); user.setPass(userValues[1]); return user; } } @Override public String convertToString(Map context, Object o) { if (o instanceof User) { User user = (User)o; return "<" + user.getName() + "," + user.getPass() + ">"; } else if (o instanceof List) { List<User> users = (List<User>)o; String result = "["; for (User user : users ) { result += "<" + user.getName() + "," + user.getPass() + ">"; } return result + "]"; } else { return ""; } } }