java中的反射
package com.sujianbo.test;
public class Person {
public static final String motherLand = "china";
private String name;
private String sex;
private int height;
public Person(){
}
public Person(String name,String sex,int height){
this.name = name;
this.sex = sex;
this.height = height;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
}
package com.sujianbo.refletct;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Parameter;
import com.sujianbo.test.Person;
@SuppressWarnings("all")
public class Test {
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, NoSuchMethodException, SecurityException, IllegalArgumentException, InvocationTargetException{
Class clazz = Class.forName("com.sujianbo.test.Person");
Field[] fs = clazz.getFields();
for(int i=0;i<fs.length;i++){
int mo = fs[i].getModifiers();
System.out.println(Modifier.toString(mo) + " " + fs[i].getName());
}
System.out.println("============所有的属性============");
Field[] fds = clazz.getDeclaredFields();
for(int i=0;i<fds.length;i++){
int mo = fds[i].getModifiers();
System.out.println(Modifier.toString(mo) + " " + fds[i].getName());
}
System.out.println("============所有的 public 的方法============");
Method[] ms = clazz.getMethods();
for(int i=0;i<ms.length;i++){
int mo = ms[i].getModifiers();
System.out.print(Modifier.toString(mo) + " " + ms[i].getReturnType().getName() + " " + ms[i].getName() + "(");
Parameter[] ps = ms[i].getParameters();
for(int j=0;j<ps.length;j++){
System.out.print(ps[j].getParameterizedType().getTypeName() + " " + ps[j].getName());
if(j<ps.length){
System.out.print(",");
}
}
System.out.print(")");
System.out.println();
}
System.out.println("============生成对象 调用对应的方法============");
Object obj = clazz.newInstance();
Method m = clazz.getMethod("setName", Class.forName("java.lang.String"));
m.invoke(obj, "wangwenming");
Person p = (Person)obj;
System.out.println(p.getName());
}
}
