从节假日api查询数据并插入到数据库代码实例

只关注main方法即可，下载到本地更改包名即可使用，如不需要插入数据库，可注释掉JDBC相关。api返回值：0工作日，1休息日，2节假日

package cn.com.ebidding;
import net.sf.json.JSONObject;

import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;

import java.io.IOException;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Calendar;

/**
 * Created by liqun.chen on 2017/5/15.
 */
public class HttpUtil {
    /**
     * json 字符串
     * @param url
     * @param param
     * @return
     */
    public static String getSerchPersion(String url,String param){
      /* 1 生成 HttpClinet 对象并设置参数 */
        HttpClient httpClient = new HttpClient();
        // 设置 Http 连接超时为5秒
        httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
      /* 2 生成 GetMethod 对象并设置参数 */
        GetMethod getMethod = new GetMethod(url);
        // 设置 get 请求超时为 5 秒
        getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
        // 设置请求重试处理，用的是默认的重试处理：请求三次
        getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
        String response = "";
      /* 3 执行 HTTP GET 请求 */
        try {
            int statusCode = httpClient.executeMethod(getMethod);
         /* 4 判断访问的状态码 */
            if (statusCode != HttpStatus.SC_OK) {
                System.err.println("请求出错: "+ getMethod.getStatusLine());
            }
         /* 5 处理 HTTP 响应内容 */
            // HTTP响应头部信息，这里简单打印
            Header[] headers = getMethod.getResponseHeaders();
            for (Header h : headers)
                System.out.println(h.getName() + "------------ " + h.getValue());
            // 读取 HTTP 响应内容，这里简单打印网页内容
            byte[] responseBody = getMethod.getResponseBody();// 读取为字节数组
            response = new String(responseBody, param);
            System.out.println("----------response:" + response);
            // 读取为 InputStream，在网页内容数据量大时候推荐使用
            // InputStream response = getMethod.getResponseBodyAsStream();
        } catch (HttpException e) {
            // 发生致命的异常，可能是协议不对或者返回的内容有问题
            System.out.println("请检查输入的URL!");
            e.printStackTrace();
        } catch (IOException e) {
            // 发生网络异常
            System.out.println("发生网络异常!");
            e.printStackTrace();
        } finally {
         /* 6 .释放连接 */
            getMethod.releaseConnection();
        }
        return response;
    }
    /**
     * post请求
     * @param url
     * @param json
     * @return
     */
    public static JSONObject doPost(String url,JSONObject json){
        DefaultHttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost(url);
        JSONObject response = null;
        try {
            StringEntity s = new StringEntity(json.toString());
            s.setContentEncoding("UTF-8");
            s.setContentType("application/json");//发送json数据需要设置contentType
            post.setEntity(s);
            HttpResponse res = client.execute(post);
            if(res.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                HttpEntity entity = res.getEntity();
                String result = EntityUtils.toString(res.getEntity());// 返回json格式：
               
                try {
                    response = JSONObject.fromObject(result);
                } catch (Exception e) {
                    response=new JSONObject().accumulate("key", result.toString());
                }
                
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        return response;
    }
    private static Connection getConn() {
        String driver = "com.mysql.jdbc.Driver";
        String url = "jdbc:mysql://localhost:3306/cec_dev";
        String username = "root";
        String password = "123456";
        Connection conn = null;
        try {
            Class.forName(driver); //classLoader,加载对应驱动
            conn = (Connection) DriverManager.getConnection(url, username, password);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return conn;
    }
    private static int deleted( ) {
        Connection conn = getConn();
        int i = 0;
        String sql = "DELETE FROM sys_holiday";
        PreparedStatement pstmt;
        try {
            pstmt = (PreparedStatement) conn.prepareStatement(sql);
           
            i = pstmt.executeUpdate();
            pstmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return i;
    }
    private static int insert( String year,String m,String d,String holiday) {
        Connection conn = getConn();
        int i = 0;
        String sql = "INSERT INTO sys_holiday (YEAR,MONTH,DAY,holiday) VALUES(?,?,?,?)";
        PreparedStatement pstmt;
        try {
            pstmt = (PreparedStatement) conn.prepareStatement(sql);
            pstmt.setString(1, year);
            pstmt.setString(2, m);
            pstmt.setString(3, d);
            pstmt.setString(4, holiday);
            i = pstmt.executeUpdate();
            pstmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return i;
    }
  //调用
    public static void main(String arg[]) throws Exception {
        deleted();
        Calendar now =Calendar.getInstance();
        now.set(now.get(now.YEAR), 01, 01);
        for (int i = 0; i < 400; i++) {
            
            String y=String.valueOf(now.get(now.YEAR));
            String m=String.valueOf(now.get(now.MONTH)+1);
            String d=String.valueOf(now.get(now.DATE));
            if (m.length()==1) {
                m="0"+m;
            }
            if (d.length()==1) {
                d="0"+d;
            }
            
               String url = "http://tool.bitefu.net/jiari/?d="+y+m+d;
             
                System.out.println(url);
                JSONObject params = new JSONObject();
                


                //post 请求
                JSONObject jsonObject = doPost(url,params);
                System.out.println(jsonObject.toString());
                System.out.println(jsonObject.get("key").toString());
                insert(y, m, d,jsonObject.get("key").toString() );
                now.add(now.DATE, 1);
        }
        
        }
}