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public class HttpRequester {
/**
* 直接通过HTTP 协议提交数据到服务器,实现如下面表单提交功能:
* 
ACTION="http://192.168.0.200:8080/ssi/fileload/test.do" enctype="multipart/form-data">
* @param actionUrl 上传路径(注：避免使用localhost 或127.0.0.1这样的路径
测试， 因为它会指向手机模拟器， 你可以使用http://www.itcast.cn 或
http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数key 为参数名,value 为参数值
* @param file 上传文件
*/
public static String post(String actionUrl, Map params, FormFile[]
files) {
try {
String BOUNDARY = "---------7d4a6d158c9"; //数据分隔线
String MULTIPART_FORM_DATA = "multipart/form-data";
URL url = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection)
url.openConnection();
conn.setConnectTimeout(5* 1000);
conn.setDoInput(true);//允许输入
conn.setDoOutput(true);//允许输出
conn.setUseCaches(false);//不使用Cache
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Charset", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FORM_DATA
+ "; boundary=" + BOUNDARY);
StringBuilder sb = new StringBuilder();
for (Map.Entry entry : params.entrySet()) {//构建表单
字段内容
sb.append("--");
sb.append(BOUNDARY);
sb.append("\r\n");
sb.append("Content-Disposition: form-data; name=\""+
entry.getKey() + "\"\r\n\r\n");
sb.append(entry.getValue());
sb.append("\r\n");
}
DataOutputStream outStream = new
DataOutputStream(conn.getOutputStream());
outStream.write(sb.toString().getBytes());//发送表单字段数据
for(FormFile file : files){//发送文件数据
StringBuilder split = new StringBuilder();
split.append("--");
split.append(BOUNDARY);
split.append("\r\n");
split.append("Content-Disposition: form-data;name=\""+
file.getFormname()+"\";filename=\""+ file.getFilname() + "\"\r\n");
split.append("Content-Type: "+ file.getContentType()+"\r\n\r\n");
outStream.write(split.toString().getBytes());
if(file.getInStream()!=null){
byte[] buffer = new byte[1024];
int len = 0;
while((len = file.getInStream().read(buffer))!=-1){
outStream.write(buffer, 0, len);
}
file.getInStream().close();
}else{
outStream.write(file.getData(), 0, file.getData().length);
}
outStream.write("\r\n".getBytes());
}
byte[] end_data = ("--" + BOUNDARY + "--\r\n").getBytes();//数据结
束标志
outStream.write(end_data);
outStream.flush();
int cah = conn.getResponseCode();
if (cah != 200) throw new RuntimeException("请求url 失败");
InputStream is = conn.getInputStream();
int ch;
StringBuilder b = new StringBuilder();
while( (ch = is.read()) != -1 ){
b.append((char)ch);
}
outStream.close();
conn.disconnect();
return b.toString();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 提交数据到服务器
* @param actionUrl 上传路径(注：避免使用localhost 或127.0.0.1这样的路径
测试， 因为它会指向手机模拟器， 你可以使用http://www.itcast.cn 或
http://192.168.1.10:8080这样的路径测试)
* @param params 请求参数key 为参数名,value 为参数值
* @param file 上传文件
*/
public static String post(String actionUrl, Map params, FormFile
file) {
return post(actionUrl, params, new FormFile[]{file});
}
public static byte[] postFromHttpClient(String path, Map params,
String encode) throws Exception{
List formparams = new ArrayList();// 用
于存放请求参数
for(Map.Entry entry : params.entrySet()){
formparams.add(new BasicNameValuePair(entry.getKey(),
entry.getValue()));
}
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams,
"UTF-8");
HttpPost httppost = new HttpPost(path);
httppost.setEntity(entity);
HttpClient httpclient = new DefaultHttpClient();//看作是浏览器
HttpResponse response = httpclient.execute(httppost);//发送post 请求
return StreamTool.readInputStream(response.getEntity().getContent());
}
/**
* 发送请求
* @param path 请求路径
* @param params 请求参数key 为参数名称value 为参数值
* @param encode 请求参数的编码
*/
public static byte[] post(String path, Map params, String encode)
throws Exception{
//String params = "method=save&name="+ URLEncoder.encode(" 老毕",
"UTF-8")+ "&age=28&";//需要发送的参数
StringBuilder parambuilder = new StringBuilder("");
if(params!=null && !params.isEmpty()){
for(Map.Entry entry : params.entrySet()){
parambuilder.append(entry.getKey()).append("=")
.append(URLEncoder.encode(entry.getValue(),
encode)).append("&");
}
parambuilder.deleteCharAt(parambuilder.length()-1);
}
byte[] data = parambuilder.toString().getBytes();
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setDoOutput(true);//允许对外发送请求参数
conn.setUseCaches(false);//不进行缓存
conn.setConnectTimeout(5 * 1000);
conn.setRequestMethod("POST");