2020-01-20

properties读取文件

package portal.portalblo.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.util.Properties;

public class PropertyUtil {
    private static final Logger logger = LoggerFactory.getLogger(PropertyUtil.class);
    private static Properties props;
    static{
        loadProps();
    }
    synchronized static private void loadProps(){
        /*logger.info("开始加载properties文件内容.......");*/
        props = new Properties();
        InputStream in = null;
        try {
            in = PropertyUtil.class.getClassLoader().getResourceAsStream("portal/portalblo/utils/EAPCasUrl.properties");
            props.load(in);     
            
        } catch (FileNotFoundException e) {
            logger.error("EAPCasUrl.properties");
        } catch (IOException e) {
            logger.error("出现IOException");
        } finally {
            try {
                if(null != in) {
                    in.close();
                }
            } catch (IOException e) {
                logger.error("EAPCasUrl.properties文件流关闭出现异常");
            }
        }
        /*logger.info("加载properties文件内容完成...........");*/
        logger.info("properties文件内容：" + props);
    }

    public static String getProperty(String key){
        if(null == props) {
            loadProps();
        }
        return props.getProperty(key);
    }
    public static String getProperty(String key, String defaultValue) {
        if(null == props) {
            loadProps();
        }
        return props.getProperty(key, defaultValue);
    }
}

properties文档

driverClass=dm.jdbc.driver.DmDriver
jdbcUrl=jdbc:dm://localhost:5236/ACAP
user=ACAP
password=HLWZWFWPT133

批量下载

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URLDecoder;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;

public static Response  batchDownload(List<TFileList> fList,HttpServletRequest request){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddhhmmss");  ;
        String dates = sdf.format(new Date());
        String zipFrontFile = "附件包-"+dates+".zip";
        String zipFile = request.getSession().getServletContext().getRealPath("/")+"/uploadFile/netPlus/zip/"+zipFrontFile;
        try{
            if(!new File(request.getSession().getServletContext().getRealPath("/")+"/uploadFile/netPlus/zip").exists())
            {
                new File(request.getSession().getServletContext().getRealPath("/")+"/uploadFile/netPlus/zip").mkdirs();
            } 
            byte[] buf = new byte[2048];
            // 创建值班单zip文件
            ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
            // 循环压缩文件
            for(TFileList tList:fList){
                File file = new File(request.getSession().getServletContext().getRealPath("/")+URLDecoder.decode(tList.getFilepath(), "UTF-8"));
                FileInputStream in = new FileInputStream(file);
                // 添加压缩包文件
                out.putNextEntry(new ZipEntry(file.getName()));
                int len = 0;
                while ((len = in.read(buf)) > 0) {
                    out.write(buf, 0, len);
                }
                // 关闭入口
                out.closeEntry();
                // 关闭文件流
                in.close();
            }
            // 关闭文件流
            out.close();
            //下载zip
            File file = new File(zipFile);
            byte[] buffer = null;
            try{
                FileInputStream fis = new FileInputStream(file);
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                byte[] b = new byte[1024];
                int n;
                while ((n = fis.read(b)) != -1){
                    bos.write(b, 0, n);
                }
                fis.close();
                bos.close();
                buffer = bos.toByteArray();
            }
            catch (FileNotFoundException e){
                e.printStackTrace();
            }
            catch (IOException e){
                e.printStackTrace();
            }
            ResponseBuilder builder = Response.ok(buffer, "application/octet-stream");
            builder.header("Content-Disposition", "attachment;filename="+new String(file.getName().getBytes("UTF-8"), "ISO8859-1"));
            Response response = builder.build();
            return response;
            
        } catch (Exception e) {
            // logger.error("异常", e);
        } finally {
            //删zip
            File file=new File(zipFile);
            if (!file.isDirectory()) {
                file.delete();
            }
        }   
        return null;
    }

下载

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
public static Response download(HttpServletRequest request,String fillPath,String fillName) throws UnsupportedEncodingException{
        String file_path = URLDecoder.decode(fillPath, "UTF-8");
        String att_name = ""; 
        if(isNotNull(fillName)){
            att_name = URLDecoder.decode(fillName, "UTF-8");
        }else{
            att_name = file_path.substring(file_path.lastIndexOf("/")+1,file_path.length());
        } 
        //从服务端读出
        file_path = request.getSession().getServletContext().getRealPath("/") + file_path;
        File file = new File(file_path);
        //ByteArrayOutputStream os = new ByteArrayOutputStream();
        byte[] buffer = null;
        try{
            FileInputStream fis = new FileInputStream(file);
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            byte[] b = new byte[1024];
            int n;
            while ((n = fis.read(b)) != -1){
                bos.write(b, 0, n);
            }
            fis.close();
            bos.close();
            buffer = bos.toByteArray();
        }
        catch (FileNotFoundException e){
            e.printStackTrace();
        }
        catch (IOException e){
            e.printStackTrace();
        }
        ResponseBuilder builder = Response.ok(buffer, "application/octet-stream");
        builder.header("Content-Disposition", "attachment;filename="+new String(att_name.getBytes("UTF-8"), "ISO8859-1"));
        Response response = builder.build();
        return response;
    }