Java发送请求 & SpringBoot定时任务

Java发送请求

处理中文字符要用URLEncoder.encode进行编码

public void sendRequest(String subUrl, String para) throws IOException {
    
    
        URL url = new URL("http://localhost:5000/"+subUrl+para);
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setRequestMethod("GET");
        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer content = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
    
    
            content.append(inputLine);
        }
        in.close();
        System.out.println(content.toString());
}

sendRequest("textcnn_data_process","?zb_id="+zid+"&zh="+URLEncoder.encode(zh, "utf8"));

SpringBoot定时任务

新建一个task的package，再新建一个timerTask的类，别忘了加上@Component标注

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.io.IOException;

@Component
public class timerTask {
    
    

    @Resource
    private ZhuanZhengService zhuanZhengService;

    @Scheduled(cron = "0/6 * * * * ?")  // 每6秒执行一次
    private void timerInitFiles() throws IOException {
    
    
        zhuanZhengService.initZhuanZhengs();
        zhuanZhengService.getFiles();
        zhuanZhengService.haveGetFiles();
    }


    @Scheduled(cron = "0 0/1 * * * ? ")  // 每一分钟执行一次
    private void trainModel() throws IOException {
    
    
        zhuanZhengService.trainModel();
    }

}

同时要在启动类上添加标注@EnableScheduling

@EnableScheduling
public class SpringbootApplication {
    
    

    public static void main(String[] args) {
    
    
        SpringApplication.run(SpringbootApplication.class, args);
    }

}

关于cron设置时间的语法规则，如果想快速生成，则参考使用这个网站：

https://cron.qqe2.com/

SpringBoot执行Linux命令

如果是简单命令（命令中不带有“|”、“<”、“>”等字符的命令）
直接使用Runtime.getRuntime().exec()方法

Process process = Runtime.getRuntime().exec("expect /home/auto/code_main/sendModel.exp "+zid);

如果是复杂命令（命令中带有“|”、“<”、“>”等字符）
cmd中的第三个指令中的内容可以替换成其他指令

private int getFreeGPU() throws IOException {
    
    
        List<Integer> memGpus = new ArrayList<>();
        String[] cmd = {
    
     "/bin/sh", "-c", "nvidia-smi -q -d Memory |grep -A4 GPU|grep Free" }; // 第三个引号中的内容可以替换成你的指令
        Process process = new ProcessBuilder(cmd).start();
        InputStream inputStream = process.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
        String line;
        while ((line = reader.readLine()) != null) {
    
    
            String[] parts = line.split("\\s+");
            int number = Integer.parseInt(parts[3]);
            memGpus.add(number);

        }
        return memGpus.size();
}