在 Java servlet 中创建和下载 CSV 文件 [英] Create and download CSV file in a Java servlet
问题描述
我正在开发 Java ExtJS 应用程序,我需要在其中创建和下载 CSV 文件.
I am working on Java ExtJS application in which I need to create and download a CSV file.
- 单击按钮时,我希望将 CSV 文件下载到客户的机器.
- 在按钮侦听器上,我正在使用 AJAX 调用 servlet.我在那里正在创建 CSV 文件.
我不想将 CSV 文件保存在服务器中.我希望应该使用下载选项动态创建该文件.我希望将文件的内容创建为字符串,然后将内容作为 file 提供,它将在浏览器中以下载模式打开(这是我用其他语言实现的,但不是确定如何在 Java 中实现它).
I don't want the CSV file to be saved in the server. I want the file should be created dynamically with a download option. I want the contents of a file to be created as a string and then I will serve the content as file in which it will open as download mode in browser (this I have achieved in other language, but not sure how to achieve it in Java).
这是我的代码,仅用于创建 CSV 文件,但如果我只能将文件下载为 CSV,我真的不想创建或保存 CSV 文件.
Here is my code only to create a CSV file, but I really don't want to create or save CSV file if I can only download the file as CSV.
public String createCSV() {
try {
String filename = "c:\test.csv";
FileWriter fw = new FileWriter(filename);
fw.append("XXXX");
fw.append(',');
fw.append("YYYY");
fw.append(',');
fw.append("ZZZZ");
fw.append(',');
fw.append("AAAA");
fw.append(',');
fw.append("BBBB");
fw.append('
');
CSVResult.close();
return "Csv file Successfully created";
} catch(Exception e) {
return e.toString();
}
}
谁能帮我解决这个问题.
Can any one help me on this.
谢谢
推荐答案
我得到了解决方案,并在下面发布.
I got the solution and I am posting it below.
public void doGet(HttpServletRequest request, HttpServletResponse response)
{
response.setContentType("text/csv");
response.setHeader("Content-Disposition", "attachment; filename="userDirectory.csv"");
try
{
OutputStream outputStream = response.getOutputStream();
String outputResult = "xxxx, yyyy, zzzz, aaaa, bbbb, ccccc, dddd, eeee, ffff, gggg
";
outputStream.write(outputResult.getBytes());
outputStream.flush();
outputStream.close();
}
catch(Exception e)
{
System.out.println(e.toString());
}
}
这里我们不需要在服务器中保存/存储文件.
Here we don't need to save / store the file in the server.
谢谢
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