updatepersonajaxaction.java

应用JavaScript结合jquery写的小demo

package edu.cust.action;

import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.rmi.ServerException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import edu.cust.beans.Person;
import edu.cust.service.PersonService;

public class updatePersonAjaxAction extends HttpServlet{
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServerException, IOException{
		response.setContentType("text/html");
		response.setCharacterEncoding("UTF-8");
		Map m = new HashMap();
		Enumeration en = request.getParameterNames();
		while(en.hasMoreElements()){
			String key = (String)en.nextElement();
			String value = new String(request.getParameter(key).getBytes("ISO-8859-1"),"UTF-8");
			m.put(key, value);
		}
		Person person = new Person();
		Long id = Long.parseLong((String)m.get("id"));
		person.setId(id);
		Class pClass = person.getClass();
		Field fields[] = pClass.getDeclaredFields();
		for(int i=0;i<fields.length;i++){
			Field field = fields[i];
			String fieldName = field.getName();
			if(m.get("name").equals(fieldName)){
				String setMethordName = "set"+fieldName.substring(0,1).toUpperCase()+
										fieldName.substring(1);
				try {
					Method setMethord = pClass.getMethod(setMethordName, new Class[]{field.getType()});
					if(setMethordName.equals("setAge")){
						setMethord.invoke(person, new Integer((String)m.get("val")));
					}else if(setMethordName.equals("setSex")){
						if(((String)m.get("val")).equals("1")){
							setMethord.invoke(person, new Boolean(true));
						}else{
							setMethord.invoke(person, new Boolean(false));
						}
					}else{
						setMethord.invoke(person, new Object[]{m.get("val")});
					}				
				} catch (Exception e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
		boolean flag = PersonService.updatePerson(person);
		String retStr = "";
		if(flag){
			retStr += "ok";
		}else{
			retStr += "error";
		}
		System.out.print(retStr);
		response.getOutputStream().println(retStr);
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServerException, IOException {
		doPost(request, response);
	}
}