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

@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);}

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)

]

2publicMethodgetWriteMethod()

获取属性的setter方法

测试

@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());}

输出

UserInfo{name=’xiaoming’}

3publicmethodgetWriteMethod()

获取属性的getter方法

测试

@Testpublic 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

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

输出：

propertyType:class java.lang.String

5publicvoidsetReadMethod(MethodreadMethod)

设置用于读取属性值的方法

测试

@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());}

输出：getName2

6publicvoidsetWriteMethod(MethodwriteMethod)

设置用于写入属性值的方法

测试

@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);}

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;    @BeforeTest    public void init() throws Exception {        this.clazz = UserInfo.class;        this.pd = new PropertyDescriptor("name", clazz);    }    @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);    }    @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());    }    @Test    public 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());    }@Testpublic void getPropertyType() throws Exception {    Class<?> propertyType = pd.getPropertyType();    System.out.println("propertyType:"+propertyType);}    @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());    }    @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);    }}---------------------------------------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;    }    @Override    public String toString() {        return "UserInfo{" +                "name='" + name + '\'' +                '}';    }}