java反射强制赋值 博客分类: java
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2024-03-22 10:11:04
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package com.my.reflect;
import java.lang.reflect.Field;
/**
* 反射赋值
* @author mengyao
*
*/
public class ReflectSet {
/**
* 用于对类的字段赋值,无视private,project修饰符,无视set/get方法
* @param c 要反射的类
* @param args 类的字段名和值 每个字段名和值用英文逗号隔开
* @return
*/
public static Object getInstance(Class<?> caz, String... args) {
try {
//装载指定类后创建类对象
Object object = Class.forName(caz.getName()).newInstance();
//通过实例对象取得用取得在内存中该实际类型class对象的引用
Class<?> obj = object.getClass();
Field[] fields = obj.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
fields[i].setAccessible(true);
for (int j = 0; j < args.length; j++) {
String str = args[j];
String strs[] = str.split(",");
if (strs[0].equals(fields[i].getName())) {
fields[i].set(object, strs[1]);
break;
}
}
}
return object;
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) {
Object object=getInstance(SendInfo.class,"destID,01201101","mobile,15810022404","content,测试数据。");
SendInfo sms=(SendInfo)object;
System.out.println("短信内容:"+sms.getContent());
System.out.println("手机号码:"+sms.getMobile());
System.out.println("尾号:"+sms.getDestID());
//String.class==new String().getClass()结果为true,
//String.class是通过类名的引用取得在内存中该类型class对象的引用;new String().getClass()是通过实例对象取得用取得在内存中该实际类型class对象的引用
System.out.println(String.class==new String().getClass());
}
}
class SendInfo {
private String destID;
private String mobile;
private String content;
public SendInfo() {
}
public SendInfo(String destID, String mobile, String content) {
this.destID = destID;
this.mobile = mobile;
this.content = content;
}
public String getDestID() {
return destID;
}
public void setDestID(String destID) {
this.destID = destID;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}
import java.lang.reflect.Field;
/**
* 反射赋值
* @author mengyao
*
*/
public class ReflectSet {
/**
* 用于对类的字段赋值,无视private,project修饰符,无视set/get方法
* @param c 要反射的类
* @param args 类的字段名和值 每个字段名和值用英文逗号隔开
* @return
*/
public static Object getInstance(Class<?> caz, String... args) {
try {
//装载指定类后创建类对象
Object object = Class.forName(caz.getName()).newInstance();
//通过实例对象取得用取得在内存中该实际类型class对象的引用
Class<?> obj = object.getClass();
Field[] fields = obj.getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
fields[i].setAccessible(true);
for (int j = 0; j < args.length; j++) {
String str = args[j];
String strs[] = str.split(",");
if (strs[0].equals(fields[i].getName())) {
fields[i].set(object, strs[1]);
break;
}
}
}
return object;
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) {
Object object=getInstance(SendInfo.class,"destID,01201101","mobile,15810022404","content,测试数据。");
SendInfo sms=(SendInfo)object;
System.out.println("短信内容:"+sms.getContent());
System.out.println("手机号码:"+sms.getMobile());
System.out.println("尾号:"+sms.getDestID());
//String.class==new String().getClass()结果为true,
//String.class是通过类名的引用取得在内存中该类型class对象的引用;new String().getClass()是通过实例对象取得用取得在内存中该实际类型class对象的引用
System.out.println(String.class==new String().getClass());
}
}
class SendInfo {
private String destID;
private String mobile;
private String content;
public SendInfo() {
}
public SendInfo(String destID, String mobile, String content) {
this.destID = destID;
this.mobile = mobile;
this.content = content;
}
public String getDestID() {
return destID;
}
public void setDestID(String destID) {
this.destID = destID;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}
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