java反射 javaBean根据属性名找属性值

╰+哭是因爲堅強的太久メ 2022-03-11 04:05 236阅读 0赞

假设一个javaBean类，有两个属性，userName和password，现在如果想通过属性名来找其对应的属性值的话，我们就要用到java反射了，我这里的方法是根据attribute name组装method方法，然后利用method的invoke方法，就可以获取到attribute value了！下面直接上代码

dto类：

public class Dto {
    	private String userName;
    	private String password;
    	public String getUserName() {
    		return userName;
    	}
    	public void setUserName(String userName) {
    		this.userName = userName;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	
    	
    }

处理方法:

import java.lang.reflect.InvocationTargetException;
    import java.lang.reflect.Method;
    
    
    public class t {
    	public static void main(String[] args){
    		Dto d = new Dto();
    		d.setUserName("LRR");
    		d.setPassword("123");
    		// 已知attribute name 组装 getter语句
    		String getter = "get" + "UserName";// getUserName
    		try {
    			// 通过method的反射方法获取其属性值
    			Method method = d.getClass().getMethod(getter, new Class[]{});
    			Object value = method.invoke(d, new Object[]{});
    			System.out.print(value);
    		} catch (IllegalArgumentException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    		} catch (IllegalAccessException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    		} catch (InvocationTargetException e) {
    				// TODO Auto-generated catch block
    				e.printStackTrace();
    		} catch (SecurityException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		} catch (NoSuchMethodException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		
    	}
    }

结果：LRR