给定一个网址，实现该网页的快照功能。

llsydn 发表于 2019-11-18 14:03

本帖最后由 wushaominkk 于 2019-11-18 20:19 编辑

//网页快照工具类
package com.snap;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.concurrent.TimeUnit;

public class SnapUtills {

static String phantomjsPath;

static {
   // 判断是什么环境
   String systemType = System.getProperties().getProperty("os.name");
   if (systemType != null && systemType.toLowerCase().indexOf("windows") > -1) {
         phantomjsPath = System.getProperty("user.dir") + "\\phantomjs\\phantomjs-2.1.1-windows";
   } else {
         phantomjsPath = System.getProperty("user.dir") + "\\phantomjs\\phantomjs-2.1.1-linux-x86_64";
   }
}

/**
* 生成网页缩略图
*/
public static String snapUrl(String url, String savePath) throws Exception {
   String cmd = phantomjsPath + "/bin/phantomjs ";
   String jspath = phantomjsPath + "/examples/rasterize.js";

   // 执行命令，超时60秒退出
   execCMD(cmd + jspath + " " + url + " " + savePath, 60);
   return savePath;
}

/**
* 命令执行（超过多少秒退出）
*
* @Param cmd 命令
* @param timeout 秒
*/
private static String execCMD(String cmd, int timeout) throws Exception {
   Process process = null;
   StringBuilder sbStd = new StringBuilder();
   StringBuilder sbErr = new StringBuilder();

   long start = System.currentTimeMillis() / 1000;
   try {
         process = Runtime.getRuntime().exec(cmd);

         BufferedReader brStd = new BufferedReader(new InputStreamReader(
               process.getInputStream()));
         BufferedReader brErr = new BufferedReader(new InputStreamReader(
               process.getErrorStream()));
         String line = null;

         while (true) {
            if (brStd.ready()) {
               line = brStd.readLine();
               sbStd.append(line + "\n");
               continue;
            }
            if (brErr.ready()) {
               line = brErr.readLine();
               sbErr.append(line + "\n");
               continue;
            }
            if (process != null) {
               try {
                     process.exitValue();
                     break;
               } catch (IllegalThreadStateException e) {
               }
            }
            if (System.currentTimeMillis() / 1000 - start > timeout) {
               sbErr.append("\ntimeout");
               break;
            }

            try {
               TimeUnit.MILLISECONDS.sleep(500);
            } catch (InterruptedException e) {
            }
         }
   } catch (IOException e) {
         throw e;
   } finally {
         if (process != null) {
            process.destroy();
         }
   }
   if (sbErr.length() > 0) {
         throw new Exception(sbErr.toString());
   } else {
         return sbStd.toString();
   }
}
}

//测试
package com.snap;

public class Test {

public static void main(String[] args) throws Exception {
   String savePath = System.getProperty("user.dir") + "\\snap-image\\" + System.currentTimeMillis() + ".jpg";
   String snapUrl = SnapUtills.snapUrl("https://www.baidu.com", savePath);
   System.out.println("生成网页快照图片的路径：" + snapUrl);
}
}
具体项目代码：https://download.csdn.net/download/qq_24101357/11970303

490694561 发表于 2019-11-18 15:10

puppteer为啥不试试这个东西呢，自动生成jpg

派大星星 发表于 2019-11-19 15:17

大佬果然是大佬，上来就是贴代码

838384855 发表于 2019-12-17 17:14

学习了,感谢了

幻--想 发表于 2021-4-9 15:10

请问能分享一下希赛的资料吗

幻--想 发表于 2021-4-9 15:13

请问能分享一下希赛的资料吗,320264603@qq.com

llsydn 发表于 2021-4-19 08:37

幻--想发表于 2021-4-9 15:13
请问能分享一下希赛的资料吗,

希赛的啥资料呀

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给定一个网址，实现该网页的快照功能。