SpringBoot创建定时任务

#->1 定时任务

参考：www.bilibili.com/video/BV1KW…

Service下新建ScheduleService.java

package com.finance.providerscore.service;

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

import java.util.Date;

/*

• Spring Boot 定时任务
• / @Service public class ScheduleService { /
  • second, minute, hour, day of month, month, day of week
  • 0 * * * * MON-FRI
  • */ @Scheduled(cron = "0 0/10 * * * *") // 每10min执行一次 public void runScheduleTask(){ System.out.println("阿喵的定时任务开启 ..." + new Date()); } } 启动类添加@EnableScheduling 开启基于注解的定时任务

package com.finance.providerscore;

import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication @EnableScheduling // 开启基于注解的定时任务 @MapperScan("com.finance.providerscore.mapper") public class MyApplication {

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

} #->2 Java后台调用Get/Post方法

pom.xml添加 httpclient 依赖

org.apache.httpcomponents httpclient 4.5.13

新建工具类SendRequetUtil.java

package com.finance.providerscore.utils;

import org.apache.http.HttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils;

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map;

public class SendRequestUtil { /*** * @param url * @param param * @return 发送返回响应 * @throws IOException */ public static String sendPost(String url, String param) throws IOException {

    System.out.println("正在进行POST请求....");
    CloseableHttpClient httpClient = HttpClients.createDefault();

    HttpPost httpPost = new HttpPost(url);
    httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8");

    StringEntity stringEntity = new StringEntity(param, "utf-8");
    httpPost.setEntity(stringEntity);
    String result = null;
    HttpResponse response = httpClient.execute(httpPost);
    result = EntityUtils.toString(response.getEntity(), "utf-8");
    return result;
}

/**
 * 向指定URL发送GET方法的请求
 * @param url   发送请求的URL
 * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
 * @return URL 所代表远程资源的响应结果
 */
public static String sendGet(String url, String param) {
    System.out.println("正在进行Get请求....");
    String result = "";

    BufferedReader bufferedReader = null;
    try {
        String urlNameString = url + "?" + param;
        URL realURL = new URL(urlNameString);
        // 打开和URL之间的连接
        URLConnection connection = realURL.openConnection();
        // 设置通用请求属性
        connection.setRequestProperty("accept", "*/*");
        connection.setRequestProperty("connection", "Keep-Alive");
        connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
        // 建立实际的连接
        connection.connect();
        // 获取所有的响应头字段
        Map<String, List<String>> map = connection.getHeaderFields();
        // 遍历所有的响应头字段
        for (String key : map.keySet()) {
            System.out.println(key + "--->" + map.get(key));
        }
        // 定义 BufferedReader输入流来读取URL的响应
        bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line = null;
        while ((line = bufferedReader.readLine()) != null) {
            result += line;
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally { // 使用finally块来关闭输入流
        try {
            if (bufferedReader != null) {
                bufferedReader.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return result;
}

} 测试：

Controller层UserHandler.java

package com.finance.providerscore.controller;

import com.finance.providerscore.entity.User; import com.finance.providerscore.mapper.UserMapper; import com.finance.providerscore.service.UserService; import com.github.pagehelper.PageInfo; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*;

import java.util.List; import java.util.Map;

@RestController public class UserHandler {

@Autowired
private UserMapper userMapper;
@Autowired
private UserService userService;

@GetMapping("/findAll")
public List<User> getUserList() {
    return userMapper.findAll();
}

@GetMapping("/findById2")
public User getUser2(int id){
    return userMapper.findById(id);
}

@PostMapping("/newsList")
public PageInfo<User> getNewsList() {
    PageInfo pageInfo = userService.selectList(1, 5);
    return pageInfo;
}

} [Get方式测试]

String res1 = SendRequestUtil.sendGet("http://localhost:8080/findAll",""); System.out.println(res1);

String res2 = SendRequestUtil.sendGet("http://localhost:8080/findById2", "id=5"); System.out.println(res2); [Post方式测试]

String resPost = SendRequestUtil.sendPost("http://localhost:8080/newsList", ""); System.out.println(resPost); 参考：blog.csdn.net/shmely/arti… ———————————————— 版权声明：本文为CSDN博主「爱吃香草冰淇淋的阿喵」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。 原文链接：blog.csdn.net/coralime/ar…