读取form数据时，java反射的一点应用
package com.gis.biz;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
public class ObjectRef {
//用反射填充对象，得到对象，
public static Object getInstance(Class ccc, Map map)
throws ClassNotFoundException, InstantiationException,
IllegalAccessException, SecurityException, NoSuchFieldException,
NoSuchMethodException, IllegalArgumentException, InvocationTargetException{
String cname = ccc.getName();
Object obj = null;
Class c = Class.forName(cname);
obj = c.newInstance();
Set set = map.keySet();
Iterator it = set.iterator();
while(it.hasNext()){
String methodName = (String)it.next();
System.out.println();
Field ff = c.getDeclaredField(methodName);
Object value= map.get(methodName);
String mName = "set"+methodName.substring(0, 1).toUpperCase()+methodName.substring(1);
Method m = c.getDeclaredMethod(mName, ff.getType());
m.invoke(obj, value);
}
return obj;
}
//把form 表单中的数据转化成map里的属性--值
public static Map getMap(HttpServletRequest request){
Map map = new HashMap();
Enumeration en =request.getParameterNames();
while(en.hasMoreElements()){
String formName = (String) en.nextElement();
String l = request.getParameter(formName);
map.put(formName, l);
}
return map;
}
}
这是本人在做web 项目时 的一点小的应用，能�
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