Java 通过反射出方法名来运行 invoke该方法，此名称字符串一定完全匹配并且区分大小写

Method meth =cla.getMethod("setStr1", new Class[]{java.lang.String.class}); new class 参数类型集合

Object result=meth.invoke(object, new Object[]{"test..."}); new object 为输入参数类型的值 与上面的数目是对应的。

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.lang.reflect.Type;

import java.util.Iterator;

public class TestMe {

private String str1;

private String str2;

private String str3;

public void method1() {

System.out.println("TestMe--------method1方法..");

}

public void method2() {

System.out.println("TestMe--------method2方法..");

}

public void method3() {

System.out.println("TestMe--------method3方法..");

}

public void setStr1(String str1) {

this.str1 = str1;

System.out.println(str1);

}

public String getStr1() {

return str1;

}

public void setStr2(String str2) {

this.str2 = str2;

}

public String getStr2() {

return str2;

}

public void setStr3(String str3) {

this.str3 = str3;

}

public String getStr3() {

return str3;

}

public static void main(String[] args) {

test();

}

private static void test() {

Class cla = TestMe.class;

try {

Object object = cla.newInstance();

Method[] methods = cla.getMethods();

Method method;

for (int i = 0; i < methods.length; i++) {

method = methods[i];

System.out.println(method.getName());

// 方法的返回值类型

Type returntype = method.getReturnType();

System.out.println("方法返回值类型" + returntype);

// 方法的参数类型

Type[] types = method.getGenericParameterTypes();

for (int j = 0; j < types.length; j++) {

Type type = types[j];

System.out.println("方法参数类型type: " + j + "----" + type);

}

}

Field[] fileds = cla.getDeclaredFields();

Field field;

for (int i = 0; i < fileds.length; i++) {

field = fileds[i];

System.out.println("---------------------------");

System.out.println(field.getType());

System.out.println(field.getName());

}

Method meth =cla.getMethod("setStr1", new Class[]{java.lang.String.class});

Object result=meth.invoke(object, new Object[]{"test..."});

} catch (InstantiationException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (SecurityException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (NoSuchMethodException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IllegalArgumentException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (InvocationTargetException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

运行结果：