从servlet访问WebContent内部的文件 [英] Access file inside WebContent from servlet

问题描述

我尝试使用来自Servlet的相对路径访问WebContent/alerts文件夹内的html文件.但是我无法使用其相对路径

I trying to access the html files inside the WebContent/alerts folder using its relative path from servlet. But i unable to access it using its relative path,

使用相对路径从 Servlet 访问WebContent中的文件:

Access the file inside WebContent from Servlet using relative path:

protected Element getSummary(String value) throws IOException
{
    Element element=null;
    Summary summary = Summary.valueOf(value);
    switch(summary) {
    case rtp_summary:
        element=parseDIV(new File("../../WebContent/alerts/rtp_bcklg_mail.html"),"rtp_summary");
        break;
    case ffu_summary:
        element=parseDIV(new File("/../../WebContent/alerts/ffu_comp_bcklg_mail.html"),"ffu_summary");
        break;    
    default:
        System.out.println("Enter a valid choice");
        break;
    }
    return element;
}

使用相对路径从 Java线程访问WebContent中的文件:

Access the file inside WebContent from Java Thread using relative path:

 public class WriteJSONFile implements Runnable{

WriteJSONFile(){
}

@Override

public void run()
{
    try {
        createJSONFile();
    } catch (IOException e) {

        e.printStackTrace();
    }
}

@SuppressWarnings("unchecked")
private static void createJSONFile() throws IOException
{
    String path="C:/Users/Thiru/Documents/Website Design/Macaw/";
    JSONArray jsonArray=new JSONArray();
    JSONObject rtpStatus=new JSONObject();
    rtpStatus.put("name","RTP");
    rtpStatus.put("status",parseDIV(new File(path+"WebContent/alerts/rtp_bcklg_mail.html"),"rtp_health"));
    jsonArray.add(rtpStatus);

    JSONObject proposalattribStatus=new JSONObject();
    proposalattribStatus.put("name","PROPOSAL ATTRIBUTE");
    proposalattribStatus.put("status",parseDIV(new File(path+"WebContent/alerts/prpsl_txtsrch.html"),"prpsl_attrb_health"));
    jsonArray.add(proposalattribStatus);

    writetoFile(jsonArray);
}


private static void writetoFile(JSONArray jsonArray) {
    try {
        String path="C:/Users/Thiru/Documents/Website Design/Macaw/";
        FileWriter file = new FileWriter(path+"WebContent/properties/status.json");
        file.write(jsonArray.toJSONString());
        file.flush();
        file.close();

    } catch (IOException e) {
        e.printStackTrace();
    }   
}

protected static String parseDIV(File input, String divElement)
        throws IOException {
    Document doc = Jsoup.parse(input, "UTF-8");
    String content = doc.getElementById(divElement).val();
    System.out.println(divElement +" "+content);
    return content;
}

}

我还想使用相对路径通过 RESTful Web服务 e方法访问Webcontent中的文件.预先感谢.

And i also want to access the files inside Webcontent from RESTful web service method using relative path. Thanks in advance.

推荐答案

使用

Use ServletContext.getRealPath() to locate the file on disk. Note that this only works if the webapp is "exploded" during deployment.

例如:

   File f = new File(getServletContext().getRealPath("alerts/rtp_bcklg_mail.html"));

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