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1构造方法

通过调用 getFoo 和 setFoo 存取方法，为符合标准 Java 约定的属性构造一个PropertyDescriptor  
public PropertyDescriptor(String propertyName,  Class<?> beanClass)  

该构造函数使用简单属性的名称，以及读取和写入属性的方法名称
public PropertyDescriptor(String propertyName, Class<?> beanClass, String readMethodName, String writeMethodName)

此构造函数使用简单属性的名称，以及用于读取和写入属性的Method对象。
public PropertyDescriptor(String propertyName, Method readMethod, Method writeMethod) 

测试

@Test
public void show() throws Exception {Class  clazz = UserInfo.class;PropertyDescriptor  p = new PropertyDescriptor("name", clazz);System.out.println("显示属性描述类:" + p);
}

输出：

显示属性描述类:

java.beans.PropertyDescriptor[

name=name;

propertyType=class java.lang.String;

readMethod=public java.lang.String com.example.feizhou.model.UserInfo.getName();

writeMethod=public void com.example.feizhou.model.UserInfo.setName(java.lang.String)

]

2public Method getWriteMethod()

获取属性的setter方法

测试

@Test
public void getWriteMethod() throws Exception {Object obj = clazz.newInstance();//setter方法给属性赋值Method method = pd.getWriteMethod();method.invoke(obj, "xiaoming");System.out.println(obj.toString());
}

输出

UserInfo{name='xiaoming'}

3public method getWriteMethod()

获取属性的getter方法

测试

@Test
public void getReadMethod() throws Exception {Object obj = clazz.newInstance();Field field = clazz.getDeclaredField("name");field.setAccessible(true);field.set(obj, "xiaoming");//getter方法给属性赋值Method method = pd.getReadMethod();method.invoke(obj);System.out.println(obj.toString());
}

输出：

UserInfo{name='xiaoming'}

4public Class<?> getPropertyType()

获取属性的类型

测试

@Test
public void getPropertyType() throws Exception {Class<?> propertyType = pd.getPropertyType();System.out.println("propertyType:"+propertyType);}

输出：

propertyType:class java.lang.String

5public void setReadMethod(Method readMethod)

设置用于读取属性值的方法

测试

@Test
public void setReadMethod() throws Exception {Object obj = clazz.newInstance();Method getName2=clazz.getDeclaredMethod("getName2");//设置读属性的方法pd.setReadMethod(getName2);//获取读属性的方法Method method = pd.getReadMethod();Object invoke = method.invoke(obj);System.out.println(invoke.toString());
}

输出：getName2

6public void setWriteMethod(Method writeMethod)

设置用于写入属性值的方法

测试

@Test
public void setWriteMethod() throws Exception {Object obj = clazz.newInstance();Method setName2=clazz.getDeclaredMethod("setName2",String.class);//设置写属性的方法pd.setWriteMethod(setName2);//获取写属性的方法Method method = pd.getWriteMethod();method.invoke(obj,"1111");System.out.println(obj);
}

输出：

UserInfo{name='1111'}

测试的数据

package com.example.feizhou.ex;import com.example.feizhou.model.UserInfo;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;import java.beans.PropertyDescriptor;
import java.beans.PropertyEditor;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;/*** @author hui* @description* @create 2018/8/30 上午11:29*/
public class PropertyDescriptorTest {private Class clazz;private PropertyDescriptor pd;@BeforeTestpublic void init() throws Exception {this.clazz = UserInfo.class;this.pd = new PropertyDescriptor("name", clazz);}@Testpublic void show() throws Exception {Class  clazz = UserInfo.class;PropertyDescriptor  p = new PropertyDescriptor("name", clazz);System.out.println("显示属性描述类:" + p);}@Testpublic void getWriteMethod() throws Exception {Object obj = clazz.newInstance();//setter方法给属性赋值Method method = pd.getWriteMethod();method.invoke(obj, "xiaoming");System.out.println(obj.toString());}@Testpublic void getReadMethod() throws Exception {Object obj = clazz.newInstance();Field field = clazz.getDeclaredField("name");field.setAccessible(true);field.set(obj, "xiaoming");//setter方法给属性赋值Method method = pd.getReadMethod();method.invoke(obj);System.out.println(obj.toString());}@Test
public void getPropertyType() throws Exception {Class<?> propertyType = pd.getPropertyType();System.out.println("propertyType:"+propertyType);}@Testpublic void setReadMethod() throws Exception {Object obj = clazz.newInstance();Method getName2=clazz.getDeclaredMethod("getName2");//设置读属性的方法pd.setReadMethod(getName2);//获取读属性的方法Method method = pd.getReadMethod();Object invoke = method.invoke(obj);System.out.println(invoke.toString());}@Testpublic void setWriteMethod() throws Exception {Object obj = clazz.newInstance();Method setName2=clazz.getDeclaredMethod("setName2",String.class);//设置写属性的方法pd.setWriteMethod(setName2);//获取写属性的方法Method method = pd.getWriteMethod();method.invoke(obj,"1111");System.out.println(obj);}
}---------------------------------------
public class UserInfo {private  String name;public String getName() {return name;}public String getName2() {return "getName2";}public void setName(String name) {this.name = name;}public void setName2(String name) {this.name = name;}@Overridepublic String toString() {return "UserInfo{" +"name='" + name + '\'' +'}';}
}