test类：提示用户程序已启动，提示保存位置，清空剪切板。

package com.ariya.service;

import com.ariya.service.impl.ClipboardServiceImpl;

/**

* @author Ariya

* 程序入口

*/

public class Test {

public static void main(String[] args) {

ClipboardServiceImpl clipboardService =new ClipboardServiceImpl();

System.out.println("程序已启动：》》》》》》》》");

System.out.println("请开始复制：》》》》》》》》");

System.out.println("默认保存位置C:/doc");

clipboardService.setClipboardText("");

clipboardService.save2txt(null);

}

}

接口类：

package com.ariya.service;

/**

* @author Ariya

*/

public interface IClipboardService {

/**

* 按入参地址保存到txt文件

* @param filePath

*/

void save2txt(String filePath);

/**

* 把剪切板的内容返回

* @return String

*/

StringgetClipboardText();

/**

* 向剪切板写东西

* @param text

*/

void setClipboardText(String text);

}

实现类：

package com.ariya.service.impl;

import com.ariya.service.IClipboardService;

import org.apache.commons.lang3.StringUtils;

import java.awt.*;

import java.awt.datatransfer.Clipboard;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.StringSelection;

import java.awt.datatransfer.Transferable;

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

/**

* @author Ariya

*/

public class ClipboardServiceImplimplements IClipboardService {

StringoldText =null;

StringnewText =null;

@Override

public void save2txt(String path) {

String filePath =null;

if(StringUtils.isEmpty(path) || path =="1") {

path ="C:/doc";

File file =new File(path);

if(!file.exists()) {

file.mkdir();

}

}

filePath = path +"/text.txt";

//持续读取

while(true) {

String clipboardText = getClipboardText();

//读到就写

if(!StringUtils.isEmpty(clipboardText)) {

String charsetName ="UTF-8";

try (OutputStreamWriter osw =new OutputStreamWriter(new FileOutputStream(filePath, true), charsetName)) {

//写操作

osw.write(clipboardText);

osw.write("\n");

osw.flush();

System.out.println("("+ clipboardText +")>>>“存盘成功");

}catch (Exception e) {

e.printStackTrace();

}

}

//睡眠0.2秒

try {

Thread.sleep(200);

}catch (InterruptedException e) {

e.printStackTrace();

}

}

}

@Override

public StringgetClipboardText() {

//获取剪切板对象

Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();

//获取剪切板中的可转换对象

Transferable transferable =null;

try {

//这里很容易抛各种异常

transferable = clipboard.getContents(null);

}catch (IllegalArgumentException e) {

System.out.println("无法复制保存该内容");

setClipboardText("");

return null;

}catch (Exception e) {

System.out.println("系统错误");

setClipboardText("");

}

//如果可转换对象不是null

if (transferable !=null) {

// 检查内容是否是文本类型

if (transferable.isDataFlavorSupported(DataFlavor.stringFlavor)) {

try {

//把文本类型可转对象直接转换为string

newText = (String) transferable.getTransferData(DataFlavor.stringFlavor);

//如果和之前的相等，直接return

if(newText.equals(oldText)) {

return null;

}

//否则就把新字符串赋值给老字符串，然后return出去

oldText =newText;

return newText;

}catch (Exception e) {

e.printStackTrace();

}

}

}

return null;

}

@Override

public void setClipboardText(String text) {

//获取剪切板对象

Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();

//实例化可转换对象

Transferable transferable =new StringSelection(text);

//往剪切板写入可转换对象

clipboard.setContents(transferable, null);

}

}

pom文件：主要是用于打包jar，实现jar的自启动

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

org.ariya

clipboard-copy

1.0-SNAPSHOT

org.apache.commons

commons-lang3

3.11

org.apache.maven.plugins

maven-compiler-plugin

1.8

1.8

org.springframework.boot

spring-boot-maven-plugin

com.ariya.service.Test

JAR

true

repackage