📄 helloworld.java
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import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class HelloWorld extends HttpServlet {
public void init(ServletConfig config) throws ServletException
{
super.init(config);
//...
}
/* A very simple implementation of the service method, in
* which we output the contents of a static html page
*/
public void service(HttpServletRequest req, HttpServletResponse res)
throws IOException{
//Must set the content type first
res.setContentType("text/html");
//Now we can obtain a PrintWriter
//PrintWriter out = res.getWriter();
/*OutputStreamWriter mywriter=new OutputStreamWriter(res.getOutputStream(),"UTF-8");
PrintWriter out=new PrintWriter(mywriter);*/
PrintWriter out=new PrintWriter(res.getOutputStream());
out.println("</html><head><title>Hello World</title></head><body>");
out.println("Hello,Welcome you come to J2EE world2!");
out.println("</body></html>");
//Do not close the output stream or print writer.
//But if use OutputStream(),then must have follow sentence.
//out.close();
out.flush();
}
}
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