id로 선택시 $("#id")
$("#sample_id")

class로 선택시 $(".class")
$(".sample_class")

name으로 선택시 $("tag_name[name=name]")

$("input[name=sample_name]")

 

다중 선택 시

$("#sample_id, #sample_id2, #sample_id3")

multipart/form-data 통신 시 송수신 소스코드

 

받는쪽 JSP

<%@ page contentType="text/html;charset=euc-kr" %> 
<%@ page import="com.oreilly.servlet.MultipartRequest" %> 
<%@ page import="com.oreilly.servlet.multipart.DefaultFileRenamePolicy" %> 
<%@ page import="java.util.*" %> 
<%@ page import="java.io.*" %> 
<%@ page import="org.json.*" %>

<% 
      String savePath="C:/data"; //저장경로 
      int sizeLimit = 10 * 1024 * 1024 ; // 용량제한 10MB
      try{ 
           MultipartRequest multi = new MultipartRequest(request, savePath, sizeLimit,"euc-kr",new DefaultFileRenamePolicy());

            String helloText= multi.getParameter("helloText"); 
            String helloFile= multi.getFilesystemName("helloFile"); 
            String originFileName = multi.getOriginalFileName("helloFile"); 
            String mimeType = multi.getContentType("helloFile");
            
            //로직 처리 
            
            out.print("통신 시 결과값");
            
        } catch(Exception e) {
            out.print(e.getMessage());
        }


%>

 

보내는쪽 (JSP version)

 

<%@ page language="java" contentType="text/html; charset=EUC-KR"
    pageEncoding="EUC-KR"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>

	<Form action="받을쪽.jsp" Method="POST" enctype="multipart/form-data">
		<input type="text" name="helloText" value=""/>
		<input type="file" name="helloFile"/>
		<input type="file" name="helloFile2"/>
		<input type="submit" value="전 송"/>
	</Form>
</body>
</html>

보내는쪽 (JAVA version)

 

package test;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

public class MultipartTest {
	private final static String boundary = "aJ123Af2318";
	private final static String LINE_FEED = "\r\n";
	private final static String charset = "euc-kr";
	private OutputStream outputStream;
	private PrintWriter writer;

	public void addTextPart(String name, String value) throws IOException  {
        writer.append("--" + boundary).append(LINE_FEED);
        writer.append("Content-Disposition: form-data; name=\""+name+"\"").append(LINE_FEED);
        writer.append("Content-Type: text/plain; charset=" + charset).append(LINE_FEED);
        writer.append(LINE_FEED);
        writer.append(value).append(LINE_FEED);
        writer.flush();
	}
	
	public void addFilePart(String name, File file) throws IOException  {
        writer.append("--" + boundary).append(LINE_FEED);
        writer.append("Content-Disposition: form-data; name=\""+name+"\"; filename=\"" + file.getName() + "\"").append(LINE_FEED);
        writer.append("Content-Type: " + URLConnection.guessContentTypeFromName(file.getName())).append(LINE_FEED);
        writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
        writer.append(LINE_FEED);
        writer.flush();

        FileInputStream inputStream = new FileInputStream(file);
        byte[] buffer = new byte[(int)file.length()];
        int bytesRead = -1;
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }
        outputStream.flush();
        inputStream.close();
        writer.append(LINE_FEED);
        writer.flush();
	}
	
	public void sendMultiPart(){
        try{
        	File file = new File("경로");
        	File file2 = new File("경로");
        	
            URL url = new URL("받는쪽 url");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            connection.setRequestProperty("Content-Type", "multipart/form-data;charset="+charset+";boundary=" + boundary);
            connection.setRequestMethod("POST");
            connection.setDoInput(true);
            connection.setDoOutput(true);
            connection.setUseCaches(false);
            connection.setConnectTimeout(10000);

            outputStream = connection.getOutputStream();
            writer = new PrintWriter(new OutputStreamWriter(outputStream, charset), true);
            
            
            //원하는 데이터 세팅
            addTextPart("helloText","데이터값");
            addFilePart("helloFile", file);
            addFilePart("helloFile2", file2);

            

            writer.append("--" + boundary + "--").append(LINE_FEED);
            writer.close();

            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK || responseCode == HttpURLConnection.HTTP_CREATED) {
                BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                String inputLine;
                StringBuffer response = new StringBuffer();
                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }
                in.close();
                
            } else {
                BufferedReader in = new BufferedReader(new InputStreamReader(connection.getErrorStream()));
                String inputLine;
                StringBuffer response = new StringBuffer();
                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }
                in.close();
                
            }

        } catch (ConnectException e) {
            e.printStackTrace();


        } catch (Exception e){
            e.printStackTrace();
        }
	}

}


일단 영어자체를 해석해보면 mapper에 내가사용한 ~~ 이 없다는 뜻이다.


보통


1. 사용한 mapper id가 틀린 경우

2. mapper가 정의 되어 있지 않은 경우

3. namespace를 잘못 준 경우

4. mapper 경로 설정을 잘못한 경우


나 같은경우는 다 되어있었는데 결국 1번 경우였다

스펠링은 맞았는데 중간에 대소문자 하나가 달라서 였다

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