java form表单上传文件 java用form表单提交

转载

mob6454cc7b19b2 2023-05-26 15:00:20

这次要和别人开发的服务器端程序接口对接，之前实现的上传文件的方法对方接口无法接收。他们的接口需要类似这样的form提交数据：

<form enctype="multipart/form-data" action=http://url/path method="POST">
<input name=uid type=text value="110">
<input name="filename” type="file" />
<input type="submit" value="test" />
</form>

解决办法是引入commons-httpclient.jar，下载地址http://hc.apache.org/downloads.cgi，模拟form表单提交数据，代码如下：

File f = new File("device1.png");
PostMethod filePost = new PostMethod(
        "http://url/path");
Part[] parts = { new FilePart("filename", f) ,new StringPart("source", "695132533"), new StringPart("status", URLEncoder.encode(status, "utf-8"))};
filePost.setRequestEntity(new MultipartRequestEntity(parts, filePost
        .getParams()));
HttpClient clients = new HttpClient();
int status = clients.executeMethod(filePost);
try {
    BufferedReader rd = new BufferedReader(new InputStreamReader(
            filePost.getResponseBodyAsStream(), "UTF-8"));
    StringBuffer stringBuffer = new StringBuffer();
    String line;
    while ((line = rd.readLine()) != null) {
        stringBuffer .append(line);
    }
    rd.close();
    System.out.println("接受到的流是：" + stringBuffer + "—-" + status);
} catch (Exception e) {
    throw new RuntimeException("error”,e);
}