//Here is my Eclipse, suppose i already get the heartvalue and oxygenvalue in other method call
private OnClickListener upload = new OnClickListener()
{
public void onClick(View v)
{
ArrayList<NameValuePair> namevaluepairs = new ArrayList<NameValuePair>(2);
namevaluepairs.add(new BasicNameValuePair("o2",oxygenvalue));
namevaluepairs.add(new BasicNameValuePair("heart",heartvalue));
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www2.comp.polyu.edu.hk:8080/08065312D/servlet/ServletTest");
httppost.setEntity(new UrlEncodedFormEntity(namevaluepairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
Log.d("d", response.toString());
InputStream is = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
String reading = sb.toString();
TextView lbl = (TextView) findViewById(R.id.test4);
lbl.setText(reading);
} catch (Exception e) {
}
//这是我的servlet
公共类FypServletTest扩展了HttpServlet{
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Connection con = null;
Statement stmt = null;
response.setContentType("text/html");
PrintWriter out = response.getWriter();
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection(
"jdbc:mysql://mysql.comp.polyu.edu.hk:3306/", "08065312d", "xxxx");
stmt = con.createStatement();
stmt.execute("USE 08065312d");
String id = "2";
String oxygenvalue = request.getParameter("o2");
String heartvalue = request.getParameter("heart");
stmt = con.createStatement();
String query="insert into Test values('"+id+"','"+oxygenvalue+"','"+heartvalue+"');";
int rs = stmt.executeUpdate(query);
out.flush();
out.close();
}
catch(Exception ex)
{
}
}
}
//我可以成功地在数据库中添加新行，但是参数（读取）变为空。我试图通过在servelet中直接println（request.getparmater（“o2”））来更改程序，但没有保存到db，结果也是一样的（在servlet中读取变为空空）。因此，我怀疑我无法将参数传递给servlet，或者方法request.getparmater有问题，那么出了什么问题？
//我遇到的问题是发送post变量，它似乎一直是空的
//过去一周我一直在看论坛，所有的httppost示例几乎都是这样的。如果你愿意帮忙，我将不胜感激。谢谢
最佳答案
通过使用hackst.com之类的东西发布到您的url，然后报告回来，检查这是否是一个android问题。