以下是一些实现您正在寻找的代码。最初在Vnet Publishing wiki上。
https://web.archive.org/web/20131202082741/http://wiki.vnetpublishing.com/Java_Mysql_Real_Escape_String
/**
* Mysql Utilities
*
* @author Ralph Ritoch <rritoch@gmail.com>
* @copyright Ralph Ritoch 2011 ALL RIGHTS RESERVED
* @link http://www.vnetpublishing.com
*
*/
package vnet.java.util;
public class MySQLUtils {
/**
* Escape string to protected against SQL Injection
*
* You must add a single quote ' around the result of this function for data,
* or a backtick ` around table and row identifiers.
* If this function returns null than the result should be changed
* to "NULL" without any quote or backtick.
*
* @param link
* @param str
* @return
* @throws Exception
*/
public static String mysql_real_escape_string(java.sql.Connection link, String str)
throws Exception
{
if (str == null) {
return null;
}
if (str.replaceAll("[a-zA-Z0-9_!@#$%^&*()-=+~.;:,\\Q[\\E\\Q]\\E<>{}\\/? ]","").length() < 1) {
return str;
}
String clean_string = str;
clean_string = clean_string.replaceAll("\\\\", "\\\\\\\\");
clean_string = clean_string.replaceAll("\\n","\\\\n");
clean_string = clean_string.replaceAll("\\r", "\\\\r");
clean_string = clean_string.replaceAll("\\t", "\\\\t");
clean_string = clean_string.replaceAll("\\00", "\\\\0");
clean_string = clean_string.replaceAll("'", "\\\\'");
clean_string = clean_string.replaceAll("\\\"", "\\\\\"");
if (clean_string.replaceAll("[a-zA-Z0-9_!@#$%^&*()-=+~.;:,\\Q[\\E\\Q]\\E<>{}\\/?\\\\\"' ]"
,"").length() < 1)
{
return clean_string;
}
java.sql.Statement stmt = link.createStatement();
String qry = "SELECT QUOTE('"+clean_string+"')";
stmt.executeQuery(qry);
java.sql.ResultSet resultSet = stmt.getResultSet();
resultSet.first();
String r = resultSet.getString(1);
return r.substring(1,r.length() - 1);
}
/**
* Escape data to protected against SQL Injection
*
* @param link
* @param str
* @return
* @throws Exception
*/
public static String quote(java.sql.Connection link, String str)
throws Exception
{
if (str == null) {
return "NULL";
}
return "'"+mysql_real_escape_string(link,str)+"'";
}
/**
* Escape identifier to protected against SQL Injection
*
* @param link
* @param str
* @return
* @throws Exception
*/
public static String nameQuote(java.sql.Connection link, String str)
throws Exception
{
if (str == null) {
return "NULL";
}
return "`"+mysql_real_escape_string(link,str)+"`";
}
}