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最近做爬虫时需要用到上传图像的相关请求,参考了下网上比较古老的方法后写了份请求样例供使用
所需要的maven包可以直接从网上查找,就不贴出来了
@SuppressWarnings("deprecation")
public String doPostImg(String url, String params,List<File> filelist) throws Exception {
logger.info(" Http Post Url : " + url + " param : "+ params);
DefaultHttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(url);
MultipartEntity mutiEntity = new MultipartEntity();
JSONObject paramsjo = JSONObject.parseObject(params);
//传入需要参数
for (String key : paramsjo.keySet()) {
if(!key.contains("file")||key.contains("fileGroup")){
mutiEntity.addPart(key,new StringBody(paramsjo.getString(key)));
}
}
//传入上传文件
for (int i = 0; i < filelist.size(); i++) {
File fd = filelist.get(i);
mutiEntity.addPart("file", new FileBody(fd));
}
post.setEntity(mutiEntity);
HttpResponse Response = client.execute(post);//执行post请求
if (Response != null) {
HttpEntity resEntity = Response.getEntity();
if (resEntity != null) {
return EntityUtils.toString(resEntity, "utf-8");
}
}
return null;
}
这边其实还可以更简化下,不过没必要所以就算了,注意params里是经过了beanToString的,如果是实体类需要转换下,表头没有添加,如果需要添加表头可以自定义个