java 反射 json动态转实体类

package test.refect;

public class Student {
	// 姓名
	private String name;
	// 年龄
	private String age;
	// 住址
	private String address;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAge() {
		return age;
	}

	public void setAge(String age) {
		this.age = age;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	@Override
	public String toString() {
		return "Student [name=" + name + ", age=" + age + ", address=" + address + "]";
	}
	
	public void sayHello(Book book){
		System.out.println(book.getName());
		
	}
}

package test.refect;

public class Book {
	private String name;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
	

}

package test.refect;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.net.URLDecoder;
import java.util.Iterator;

import net.sf.json.JSONObject;

public class Main {
	
	public static void main(String[] args) throws Exception {
		
		//Student str --> Student  主类
		String str = "test.refect.Student";
		Class<?> clazz = Class.forName(str);
		
		//Book实体  str --> Book  参数类
		String bookStr = "test.refect.Book";
		Class<?> bookClazz = Class.forName(bookStr);
		
		
		//json --> Book        将参数类转为JSONOBJECT
		String bookJson ="{\"name\":\"Java\"}"; 
		JSONObject jsonObject=JSONObject.fromObject(bookJson);
		
		//实例化参数类
		Object bookInStance = bookClazz.newInstance();
		
		// 通过JSONOBJECT 为参数类赋值
		Iterator<?> keys = jsonObject.keys();
        while (keys.hasNext()) {
            Object key = keys.next();
            Object value = jsonObject.get(key);
            // 替换非法字符
            String _key = String.valueOf(key).replaceFirst("\\W", "");
            Field field = bookClazz.getDeclaredField(_key);
            field.setAccessible(true);
            field.set(bookInStance, URLDecoder.decode(String.valueOf(value), "UTF-8"));
            field.setAccessible(false);
        }
        
        //将参数类注入到主类
        Method method = clazz.getDeclaredMethod("sayHello", bookClazz);
        
        //执行主类
    	method.invoke(clazz.newInstance(), bookInStance);
        
		
	}

}