Spring MVC + Hibernate Encoding Problem

Question

I am working on a Spring MVC + Hibernate application, use MySQL (version 5.0.51a) with the InnoDB engine.

The problem occurs when I submit a form with Cyrillic characters. As a result, the database contains meaningless characters in an unknown encoding.

All JSP pages, databases (+ tables and fields) created using UTF-8. The Hibernate configuration also contains a property that sets the encoding to UTF-8.

I solved this by creating a filter that encodes the contents of the request using UTF-8. Sample code:

…
encoding = "UTF-8";
request.setCharacterEncoding(encoding);
chain.doFilter(request, response);
…

But this noticeably slows down the application.

Interestingly, executing the insert request directly from the application (i.e., starting from Eclipse as a Java application) works fine.

UPD

, - .

CharacterEncodingFilter. , !

<filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
        <param-name>forceEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>

<filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>*</url-pattern>
</filter-mapping>

Answer 1

JSP UTF-8 :

• <%@page pageEncoding="UTF-8" %>
• - right-click > properties eclipse UTF-8 ( , , )

spring CharacterEncodingFilter , :

<filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
        <param-name>forceEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>

, doFilter() synchronized.

Answer 2

: UTF-8 () → UTF-16 (Java) → UTF-8 (DB).

, () . , - IMHO.

JSP... UTF-8

UTF-8 ? (. ). , , UTF-8.