The point is your database coding should be consistent with the coding of character that you plan to insert into the database.
Attention: Here,I take "UTF-8" as default character coding way .
There are three steps:
1. set page charset
e.g <%@ page language="java" contentType="text/html; charset=UTF-8" %>
2. create character filter:
package com.victory.util;
import javax.servlet.http.HttpServlet;
import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
import javax.servlet.http.*;
import java.io.IOException;
public class CharacterEncodingFilter
extends HttpServlet
implements Filter {
private FilterConfig filterConfig;
private String targetEncoding = "ASCII";
/**
* Called by the web container to indicate to a filter that it is being placed
* into service.
*
* @param filterConfig FilterConfig
* @throws ServletException
* @todo Implement this javax.servlet.Filter method
*/
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
this.targetEncoding = filterConfig.getInitParameter("encoding");
}
/**
* The <code>doFilter</code> method of the Filter is called by the container
* each time a request/response pair is passed through the chain due to a
* client request for a resource at the end of the chain.
*
* @param request ServletRequest
* @param response ServletResponse
* @param chain FilterChain
* @throws IOException
* @throws ServletException
* @todo Implement this javax.servlet.Filter method
*/
public void doFilter(ServletRequest srequest, ServletResponse sresponse,
FilterChain chain) throws IOException, ServletException {
try {
HttpServletRequest request = (HttpServletRequest) srequest;
request.setCharacterEncoding(targetEncoding);
chain.doFilter(srequest, sresponse);
}
catch (ServletException sx) {
filterConfig.getServletContext().log(sx.getMessage());
}
catch (IOException iox) {
filterConfig.getServletContext().log(iox.getMessage());
}
}
/**
* Called by the web container to indicate to a filter that it is being taken
* out of service.
*
* @todo Implement this javax.servlet.Filter method
*/
public void destroy() {
filterConfig = null;
targetEncoding = null;
}
}
3.config web.xml
attention: add these to your web.xml
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>com.victory.util.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
4.set database configration
modify the file: my.ini
[client] default-character-set=utf8
[mysqld] default-character-set=utf8
5.restart Mysql server
6.modified your table coding way to utf8
or ceate your table like this :
CREATE TABLE `user` (
`ID` int(11) NOT NULL auto_increment,
`USERNAME` varchar(50) NOT NULL default '',
`PASSWORD` varchar(50) NOT NULL default '',
PRIMARY KEY (`ID`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
7.restrart your tomcat sever
OK,it's all.
Authrougn I have sovled my problem, I think I don't have enough understanding for it, So hope communicate with you!
Attention:mess code also exist in your database,through page hasn't mess code.