您的SQL语法附近的错误
[英]error in your SQL syntax near
问题描述
I need help. 
我需要帮助。 I'm developing app for uploading text files. 我正在开发用于上传文本文件的应用程序。 For this moment I encountered error which I cannot clearly understand. 目前，我遇到了我无法清楚理解的错误。 Here is my code: 这是我的代码：
Index.jsp Index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Servlet based API for querying text file</title>
<link rel="stylesheet" href="css/bootstrap.min.css" type="text/css">
</head>
<body>
<h3>Please choose file</h3>
<div class="container">
<form action="TextProccessing" method="post"
enctype="multipart/form-data">
<div class="form-group">
<label for="browseTxt">Upload file:</label>
<input type="file" name="browseTxt" id="browseTxt" value="select text file">
<p class="help-block">
<b>Note:</b> Please choose .txt file only
</p>
</div>
<BUTTON class="btn btn-default" type="submit">Upload</BUTTON>
</form>
</div>
<h2>Place for text</h2>
<div class="container"></div>
</body>
</html>
TextProccessing 文字处理
package com.controller;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
//import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
@MultipartConfig(maxFileSize = 16177215)
public class TextProccessing extends HttpServlet {
private static final long serialVersionUID = 1L;
private final static String RESULT_PAGE = "/result.jsp";
private final String dbURL = "jdbc:mysql://127.0.0.1:3306/textfilesdb";
private final String dbUser = "root";
private final String dbPassword = "root";
// for this moment
private String file_Name_test = "file_Name_test";
private String file_size_test = "file_size_test";
private String fileCreationDate_test = "fileCreationDate_test";
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
InputStream inputStream = null;
Part filePart = request.getPart("browseTxt");
if (filePart != null) {
// prints out some information for debugging
System.out.println(filePart.getName());
System.out.println(filePart.getSize());
System.out.println(filePart.getContentType());
// obtains input stream of the upload file
inputStream = filePart.getInputStream();
}
Connection conn = null; // connection to the database
String message = null; // message will be sent back to client
try {
// connects to the database
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
conn = DriverManager.getConnection(dbURL, dbUser, dbPassword);
// constructs SQL statement
String sql = "INSERT INTO files(file_Name, file_size, fileCreationDate, text_file) values (?, ?, ?, ?)";
PreparedStatement statement = conn.prepareStatement(sql);
statement.setString(1, file_Name_test);
statement.setString(2, file_size_test);
statement.setString(3, fileCreationDate_test);
if (inputStream != null) {
// fetches input stream of the upload file for the blob column
statement.setBlob(4, inputStream);
}
// sends the statement to the database server
int row = statement.executeUpdate();
if (row > 0) {
message = "File uploaded and saved into database";
}
} catch (SQLException ex) {
message = "ERROR: " + ex.getMessage();
ex.printStackTrace();
} finally {
if (conn != null) {
// closes the database connection
try {
conn.close();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
// sets the message in request scope
request.setAttribute("Message", message);
getServletContext().getRequestDispatcher(RESULT_PAGE).forward(request, response);
}
}
}
it seems ok but I have such error stacktrace 似乎还可以，但我有这样的错误stacktrace
browseTxt 1189 text/plain com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax;
And my DB structure 而我的数据库结构
create database TextFilesDB; 创建数据库TextFilesDB;
use TextFilesDB; 使用TextFilesDB;
CREATE TABLE
files(idint(11) NOT NULL AUTO_INCREMENT,files（idint（11）NOT NULL AUTO_INCREMENT，
file_Namevarchar(45) NOT NULL,file_sizevarchar(45) DEFAULT NULL,fileCreationDatevarchar(45) DEFAULT NULL,text_filemediumblob, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=utf16file_Namevarchar（45）非空，file_sizevarchar（45）默认为空，fileCreationDatevarchar（45）默认为空，text_filemediumblob，主键（id））ENGINE = InnoDB DEFAULT CHARSET = utf16
1 个解决方案
解决方案1
2 已采纳 2015-11-15 20:29:50
It seems that you have some format problem with the columns names. 似乎您的列名称存在格式问题。 Can you try to replace 你能替换吗
INSERT INTO files(file_Name, file_size, fileCreationDate, text_file) values (?, ?, ?, ?)
by 通过
INSERT INTO files(file_Name, file_size, fileCreationDate, text_file) values (?, ?, ?, ?)
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