有人实际操作过doPUT吗?刚尝试使用PUT来上传文件,可是即使html中的表单method设置为put,到了容器中的servlet会转换到doGet方法。
程序如下:
html页面:
<html>
<body>
<form enctype="multipart/form-data" method="PUT"
action="http://localhost:8080/textjsp/welcome/testdefault">
<input type="file" size="20" name="FileToUpload"
value="Select File">
<input type="submit" name="UploadFile" value="Upload">
<input type="reset" value="Reset">
</form>
</body>
</html>servlet如下:
import java.io.*;
import java.util.*;
import java.net.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class UploadServlet extends HttpServlet { /**
* Constructor of the object.
*/
public UploadServlet() {
super();
} /**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
} /**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
} /**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
static final String dir="C:/temp";
public void doPut(HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException
{
PrintWriter outHTML = res.getWriter();
outHTML.println("done enter doPut");
/*
try
{
int i;
InputStream input;
input = req.getInputStream();
BufferedInputStream in =
new BufferedInputStream(input);
BufferedReader reader =
new BufferedReader(
new InputStreamReader(in));
File outputFile =
new File("c:/temp/out.txt");
FileWriter out =
new FileWriter(outputFile);
while ((i = reader.read()) != -1)
{
out.write(i);
}
out.close();
in.close();
}
catch (IOException e) {}*/
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}}
程序如下:
html页面:
<html>
<body>
<form enctype="multipart/form-data" method="PUT"
action="http://localhost:8080/textjsp/welcome/testdefault">
<input type="file" size="20" name="FileToUpload"
value="Select File">
<input type="submit" name="UploadFile" value="Upload">
<input type="reset" value="Reset">
</form>
</body>
</html>servlet如下:
import java.io.*;
import java.util.*;
import java.net.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class UploadServlet extends HttpServlet { /**
* Constructor of the object.
*/
public UploadServlet() {
super();
} /**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
} /**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
} /**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
static final String dir="C:/temp";
public void doPut(HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException
{
PrintWriter outHTML = res.getWriter();
outHTML.println("done enter doPut");
/*
try
{
int i;
InputStream input;
input = req.getInputStream();
BufferedInputStream in =
new BufferedInputStream(input);
BufferedReader reader =
new BufferedReader(
new InputStreamReader(in));
File outputFile =
new File("c:/temp/out.txt");
FileWriter out =
new FileWriter(outputFile);
while ((i = reader.read()) != -1)
{
out.write(i);
}
out.close();
in.close();
}
catch (IOException e) {}*/
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}}
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