public void wenJianPLCsv(List list, String name) {
try {
File file = new File(url + name + ".csv");
if(!file.exists()){
System.out.println("创建文件！！！");
file.createNewFile();
}
writeFileContent(file, list);
} catch (IOException e1) {
e1.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static boolean writeFileContent(File file,List list) throws IOException{
Boolean bool = false;
FileWriter fileWriter = null;
try {
fileWriter = new FileWriter(file, true); //应用fileWrite流
StringBuffer buffer = new StringBuffer();
for (int q = 0; q < list.size(); q++) {
buffer.append(list.get(q).getId()+",");
buffer.append(list.get(q).getTime_point()+",");
buffer.append(list.get(q).getAqi()+",");
buffer.append(list.get(q).getArea()+",");
buffer.append(list.get(q).getPosition_name()+",");
buffer.append(list.get(q).getStation_code()+",");
buffer.append(list.get(q).getSO2()+",");
buffer.append(list.get(q).getNO2()+",");
buffer.append(list.get(q).getCO()+",");
buffer.append(list.get(q).getO3()+",");
buffer.append(list.get(q).getPM2_5()+",");
buffer.append(list.get(q).getPM10()+",");
buffer.append(list.get(q).getPrimary_pollutant().replaceAll(",", "，")+",");
buffer.append(list.get(q).getQuality()+" \r\n");
}
bool = true;
fileWriter.append(buffer);//使用文本追加，不覆盖文件原有内容
//fileWriter.write(buffer);//write将覆盖文件原有内容
buffer.delete(0, buffer.length());//删除字符串内容
System.out.println("buffer.toString():"+buffer.toString());
} catch (Exception e) {
e.printStackTrace();
}finally {
if( fileWriter!=null){
fileWriter.close();
}
}
return bool;
}
jsp页面将服务器上的文件下载到本地电脑上
if(request.getAttribute("wenjian")!=null){
String dizhi=request.getAttribute("wenjian").toString();
String name = dizhi.split("/")[4];//文件名
InputStream ins = new FileInputStream(dizhi);//加
BufferedInputStream bins = new BufferedInputStream(ins);//
OutputStream outs = response.getOutputStream();//
BufferedOutputStream bouts = new BufferedOutputStream(outs);
response.reset();
response.setContentType("application/x-msdownload");
response.setHeader(
"Content-Disposition",
4000
"attachment;filename="
+ URLEncoder.encode(name, "UTF-8").replaceAll("\\+", "%20").replaceAll("%28", "\\(").replaceAll("%29", "\\)").replaceAll("%3B", ";").replaceAll("%40", "@").replaceAll("%23", "\\#").replaceAll("%26", "\\&"));
int bytesRead = 0;
byte[] buffer = new byte[8192];
//
while ((bytesRead = bins.read(buffer, 0, 8192)) != -1) {
bouts.write(buffer, 0, bytesRead);
}
bouts.flush();//
out.clear();
out= pageContext.pushBody();
ins.close();
bins.close();
outs.close();
bouts.close();
File file = new File(dizhi);//加
file.delete();
}
%>
