在servlet实现的SOAPWeb服务中返回wsdl

Question

我正在GAE中实现SOAP web服务。由于GAE不支持JAX-WS，所以我选择了这种方式，基本上就是自己从servlet构建soap请求和响应。

一切都很好，但我如何才能在http://myurl/MyService?wsdl中返回wsdl描述？

我想我必须实现servlet的GET方法，但如何实现呢？

Answer 1

我附上了一个工作实现。请注意，它是基于Servlet 3.0规范的。如果您使用的是2.5，注释将无法工作。

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Enumeration;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name="MyWSServlet", urlPatterns={"/MyService"})
public class MyWSServlet extends HttpServlet {
    private static final long serialVersionUID = 3605874163075522777L;
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        boolean requestForWSDL = false;
        Enumeration<String> params = req.getParameterNames();
        while (params.hasMoreElements()) {
            if ("wsdl".equalsIgnoreCase(params.nextElement())) {
                requestForWSDL = true;
            }
        }
        if (requestForWSDL) {
            FileInputStream wsdlInputStream = new FileInputStream(req.getServletContext().getRealPath("/wsdl/TemperatureService.wsdl"));
            byte[] buffer = new byte[1024];
            resp.setContentType("application/xml");
            int bytesRead = 0;
            while ((bytesRead = wsdlInputStream.read(buffer)) != -1) {
                resp.getOutputStream().write(buffer, 0, bytesRead);
            }
            wsdlInputStream.close();
            resp.getOutputStream().flush();
        }
    }
}