java反射应用对BEAN的操作，写通用类、标签时有用

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

//其中User就是一个bean，里面就一个name属性
public class Test {
    
public static void main(String[] args) throws SecurityException, NoSuchMethodException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException, InvocationTargetException{
User user=new User();
List list=new ArrayList();
list.add(user);
System.out.print("+++++++");
Method method=getSetMethod(list.get(0).getClass(),"name");
System.out.print("+++++++");
method.invoke(list.get(0),"liuyong");
method=getGetMethod(list.get(0).getClass(),"name");
System.out.println(method.invoke(list.get(0),null));
}

public static Method getGetMethod(Class objectClass,String fieldName) throws SecurityException, NoSuchMethodException{
    System.out.print("+++++++");
    StringBuffer sb=new StringBuffer();
    sb.append("get");
    sb.append(fieldName.substring(0,1).toUpperCase());
    sb.append(fieldName.substring(1));
    Method method=objectClass.getMethod(sb.toString(), null);
    System.out.print("+++++++");
    return method;
}

public static Method getSetMethod(Class objectClass,String fieldName) throws SecurityException, NoSuchMethodException, NoSuchFieldException{
    Class[] parameterTypes=new Class[1];
    Field field=objectClass.getDeclaredField(fieldName);
    System.out.println("dasg");
    parameterTypes[0]=field.getType();
    StringBuffer sb=new StringBuffer();
    System.out.println("dasg");
    sb.append("set");
    sb.append(fieldName.substring(0,1).toUpperCase());
    sb.append(fieldName.substring(1));
    System.out.println(fieldName);
    Method method=objectClass.getMethod(sb.toString(), parameterTypes);
    System.out.println("dasg");
    return method;
    
}
}