支付宝（查询对账单下载地址（alipay.data.dataservice.bill.downloadurl.query））

通过url下载zip对账单文件，进行解压，读取压缩文件内容。

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import java.net.URL;
import java.net.URLConnection;

import java.text.SimpleDateFormat;

import java.util.Date;

import com.alipay.downOrdession.*;//修改zip源码包

public class Zip2String {

    public static void main(String[] args) throws Exception {
        String alipay_url =
"http://dwbillcenter.alipay.com/downloadBillFile.resource?bizType=trade&userId=20889117596609430156&fileType=csv.zip&bizDates=20170628&downloadFileName=20889117596609430156_20170628.csv.zip&fileId=%2Ftrade%2F20889117596609430156%2F20170628.csv.zip&timestamp=1499075857&token=fdcd1fa66d4270ff19f727db0db7af70";
        String filename=getDownloadFileName(alipay_url);

        String down_url = "d:\\test\\ceshi123\\"+filename+".zip";
        /*
         * 通过调用支付宝接口返回的url下载zip文件
         */
        boolean down_success = downLoadZip(alipay_url,down_url);
        String connetall = "";

        //true or  false 下载成功，调用解压方法
        if(down_success){
            File save_down_url = new File(down_url);
            /*
             * 解压下载的zip文件
             */
//            String unzipFilePath = comZipCvsFile(save_down_url);

            /*
             * 读取下载的zip文件，返回一个string字符串
             */
            connetall = readZipToString(save_down_url);
        }
        /* 返回结果
         * 1.false，下载失败
         * 2.空字符串||"false"。解压或者读取转string失败
         */
        //return connetall;
    }

    /**
     * 通过支付宝查询对账单接口返回的url,下载zip文件
     * @param alipay_url
     * @param down_url
     * @return
     */
    public static boolean downLoadZip(String alipay_url,String down_url) {
        boolean down_success = false;
        int bytesum = 0;
        int byteread = 0;
        Date date = new Date();
        SimpleDateFormat sf = new SimpleDateFormat("yyyy/MM/dd");
        String dateFloder = sf.format(date);

        InputStream inStream = null;
        FileOutputStream fs = null;

        try {

            URL url = new URL(alipay_url);
            URLConnection conn = url.openConnection();
            inStream = conn.getInputStream();

            //自定义文件保存地址
            String unzipFilePath =  down_url.substring(0, down_url.lastIndexOf("\\"));//判断下载保存路径文件夹

            File unzipFileDir = new File(unzipFilePath);//下载文件存放地址
            if (!unzipFileDir.exists() || !unzipFileDir.isDirectory()) {
                unzipFileDir.mkdirs();
            }
            //解压文件是否已存在
            File entryFile = new File(down_url);
            if (entryFile.exists()) {
                //删除已存在的目标文件
                entryFile.delete();
            }

            fs = new FileOutputStream(down_url);

            byte[] buffer = new byte[4028];

            while ((byteread = inStream.read(buffer)) != -1) {
                bytesum += byteread;
                fs.write(buffer, 0, byteread);
            }
            down_success = true;
            System.out.println(dateFloder+"文件下载成功.....");
        } catch (Exception e) {
            System.out.println(dateFloder+"文件下载失敗" + e);

            return false;
        } finally {
            try {
                if (inStream != null) {
                    inStream.close();
                }
            } catch (IOException e) {
                inStream = null;
            }

            try {
                if (fs != null) {
                    fs.close();
                }
            } catch (IOException e) {
                fs = null;
            }
        }
        return down_success;
    }

    /**
     * 读取zip文件，不解压缩直接解析，支持文件名中文，解决内容乱码
     * @param file
     * @return   读取zip文件，返回字符串
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public static  String readZipToString(File file) throws Exception {
        String connet = "";
       try {

           //获得输入流，文件为zip格式，
           //支付宝提供
           //20886126836996110156_20160906.csv.zip内包含
           //20886126836996110156_20160906_业务明细.csv
           //20886126836996110156_20160906_业务明细(汇总).csv
           ZipInputStream in = new ZipInputStream(new FileInputStream(file));
           //不解压直接读取,加上gbk解决乱码问题
           BufferedReader br = new BufferedReader(new InputStreamReader(in,"gbk"));
           ZipEntry zipFile;
           //返回的字符串---每个文件内容相加
           BufferedWriter bw = null;
           //循环读取zip中的cvs文件，无法使用jdk自带，因为文件名中有中文
           while ((zipFile=in.getNextEntry())!=null) {
               if (zipFile.isDirectory()){
                   //如果是目录，不处理
               }
               String file_connet = "";
               //获得cvs名字
               String fileName = zipFile.getName();
               System.out.println("-----"+fileName);
               //检测文件是否存在
               if (fileName != null && fileName.indexOf(".") != -1) {
                    String line;
                    /*
                     * 1.每一行用 | 隔开
                     * 2.每一个文件用 ; 隔开
                     */
                  //  bw = new BufferedWriter(new FileWriter("d:\\test\\test.txt")); //测试读取内容
                    while ((line = br.readLine()) != null) {

                        file_connet = file_connet + "|" + line;
                       // System.out.println(line);

                    }
               }

               connet = connet + file_connet + ";";
           }
         //  bw.write(connet);
           //关闭流
         //  bw.close();
           br.close();
           in.close();

    } catch (Exception e) {
        System.out.println("zip文件读取失敗" + e);

         return "false";
    }

    return connet;
    }

    /**解压缩
     * 解压通过url获得对账单数据流（.zip）
     * @param file //zip文件存放地址
     * @return
     */
    @SuppressWarnings("unchecked")
    public static String comZipCvsFile(File file) throws Exception {
        //自定义文件保存地址
        String unzipFilePath = file.getCanonicalPath();
        unzipFilePath = unzipFilePath.substring(0, unzipFilePath.lastIndexOf("."));
        System.out.println("解压后文件保存路径："+unzipFilePath);

        //获得输入流，文件为zip格式，
        //支付宝提供
        //20886126836996110156_20160906.csv.zip内包含
        //20886126836996110156_20160906_业务明细.csv
        //20886126836996110156_20160906_业务明细(汇总).csv
        ZipInputStream in = new ZipInputStream(new FileInputStream(file));

        ZipInputStream zin = new ZipInputStream(in);
        ZipEntry zipFile;
        BufferedOutputStream bos = null;
        try {

            zin = new ZipInputStream(new FileInputStream(file));

            while ((zipFile = zin.getNextEntry()) != null) {
                System.out.println(zipFile.getName());

                File target = new File(file.getParent(), zipFile.getName());

                if (!target.getParentFile().exists()) {
                    // 创建文件父目录
                    target.getParentFile().mkdirs();
                }

               //创建解压缩文件保存的路径 文件夹
                File unzipFileDir = new File(unzipFilePath);//解压文件存放地址---unzipFilePath(解压文件去吃.zip)
                if (!unzipFileDir.exists() || !unzipFileDir.isDirectory()) {
                    unzipFileDir.mkdirs();
                }

                String file_Name_csv = target.getName();
                String entryFilePath = unzipFilePath + File.separator + file_Name_csv;//decom_Path(存放地址)+文件名

                //解压文件是否已存在
                File entryFile = new File(entryFilePath);
                if (entryFile.exists()) {
                    //删除已存在的目标文件
                    entryFile.delete();
                }

                /*
                 * 写入文件
                 */
//              bos = new BufferedOutputStream(new FileOutputStream(target));//解压到和zip在同一个文件夹
                bos = new BufferedOutputStream(new FileOutputStream(entryFile));//自定义文件夹

                int read = 0;
                byte[] buffer = new byte[1024 * 10];

                while ((read = zin.read(buffer, 0, buffer.length)) != -1) {
                    bos.write(buffer, 0, read);
                }

                bos.flush();
            }
            //关闭流
            zin.close();
            bos.close();

        } catch (Exception e) {
            // TODO: handle exception
            System.out.println("zip文件解压失敗" + e);

            return "false";
        }
        return unzipFilePath;//返回解压文件保存路径

    }

    /**
     * 通过alipay_url获取下载的文件名称
     * @param alipay_url
     * @return
     */
    private static String getDownloadFileName(String alipay_url){
        String tempStr = alipay_url.substring(alipay_url.indexOf("downloadFileName")+17, alipay_url.length());
        tempStr = tempStr.substring(0,tempStr.indexOf(".zip"));
        return tempStr;
    }

}