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用于Spring MVC和Thymeleaf应用程序的UTF8MB4字符编码

[英]UTF8MB4 character encoding for Spring MVC and Thymeleaf application

 原文  2013-06-09 06:00:30  1   1    spring/ spring-mvc/ thymeleaf/ utf8mb4

问题描述

I was able to store utf8mb4 character in my MySQL database following instructions in this post by Mathias Bynens. 按照Mathias Bynens在这篇文章中的说明，我能够在我的MySQL数据库中存储utf8mb4字符。 

http://mathiasbynens.be/notes/mysql-utf8mb4

I can see the utf8mb4 characters (eg:♥) being returned from the database to my Controller in debug mode in Netbeans. 我可以看到utf8mb4字符（例如：♥）在Netbeans中以调试模式从数据库返回到我的控制器。

My web.xml configuration. 我的web.xml配置。 NOTE : Setting the configuration to UTF-8 works fine but not UTF8MB4. 注意 ：将配置设置为UTF-8可以正常工作，但不能使用UTF8MB4。 I've also tried lowercase utf8mb4 我也尝试过小写utf8mb4 

<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF8MB4</param-value>
    </init-param>
    <init-param>
        <param-name>forceEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>

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

Thymeleaf configuration 胸腺配置 

 <bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
    <property name="prefix" value="/WEB-INF/templates/" />
    <property name="suffix" value=".html" />
    <property name="templateMode" value="HTML5" />
    <property name="characterEncoding" value="UTF8MB4" /> 
    <property name="cacheable" value="false" />
</bean>

<bean id="templateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine">
    <property name="templateResolver" ref="templateResolver" />
    <property name="additionalDialects"> 
        <set> 
            <bean class="com.cmr.dialect.BLCDialect"/> 
        </set> 
    </property> 
</bean>

<bean id="viewResolver" class="org.thymeleaf.spring3.view.ThymeleafViewResolver">
    <property name="characterEncoding" value="UTF8MB4" /> 
    <property name="templateEngine" ref="templateEngine" />
</bean>

This is my hibernate connection url which I assume is working fine because I can see proper characters being returned testing in Netbeans debug mode. 我认为这是我的休眠连接URL，它可以正常工作，因为我可以看到在Netbeans调试模式下测试返回的正确字符。 

db.url=jdbc:mysql://localhost:3306/site?useUnicode=true&character_set_server=utf8mb4

This runtime error occurs when I have the UTF8MB4 configuration in web.xml 当我在web.xml中具有UTF8MB4配置时，会发生此运行时错误 

java.io.UnsupportedEncodingException: UTF8MB4
org.apache.tomcat.util.buf.B2CConverter.getCharset(B2CConverter.java:71)
org.apache.catalina.connector.Request.setCharacterEncoding(Request.java:1561)
org.apache.catalina.connector.RequestFacade.setCharacterEncoding(RequestFacade.java:307)
javax.servlet.ServletRequestWrapper.setCharacterEncoding(ServletRequestWrapper.java:113)
javax.servlet.ServletRequestWrapper.setCharacterEncoding(ServletRequestWrapper.java:113)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:83)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.access.channel.ChannelProcessingFilter.doFilter(ChannelProcessingFilter.java:144)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)

Removing web.xml UTF8MB4 config throws this runtime error in 删除web.xml UTF8MB4配置会在 

java.io.UnsupportedEncodingException: UTF8MB4
sun.nio.cs.StreamEncoder.forOutputStreamWriter(StreamEncoder.java:42)
java.io.OutputStreamWriter.<init>(OutputStreamWriter.java:83)
org.apache.tomcat.util.buf.WriteConvertor.<init>(C2BConverter.java:174)
org.apache.tomcat.util.buf.C2BConverter.<init>(C2BConverter.java:47)
org.apache.catalina.connector.OutputBuffer.setConverter(OutputBuffer.java:531)
org.apache.catalina.connector.OutputBuffer.checkConverter(OutputBuffer.java:497)
org.apache.catalina.connector.Response.getWriter(Response.java:631)
org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:198)
javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:112)
javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:112)
org.springframework.security.web.context.SaveContextOnUpdateOrErrorResponseWrapper.getWriter(SaveContextOnUpdateOrErrorResponseWrapper.java:109)
org.thymeleaf.spring3.view.ThymeleafView.renderFragment(ThymeleafView.java:221)
org.thymeleaf.spring3.view.ThymeleafView.render(ThymeleafView.java:146)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.access.channel.ChannelProcessingFilter.doFilter(ChannelProcessingFilter.java:144)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)

Edit: Here are mysql variables 编辑：这是mysql变量 

mysql> SHOW VARIABLES WHERE Variable_name LIKE 'character\_set\_%' OR Variable_name LIKE 'collation%';
+--------------------------+--------------------+
| Variable_name            | Value              |
+--------------------------+--------------------+
| character_set_client     | utf8mb4            |
| character_set_connection | utf8mb4            |
| character_set_database   | utf8mb4            |
| character_set_filesystem | binary             |
| character_set_results    | utf8mb4            |
| character_set_server     | utf8mb4            |
| character_set_system     | utf8               |
| collation_connection     | utf8mb4_general_ci |
| collation_database       | utf8mb4_unicode_ci |
| collation_server         | utf8mb4_unicode_ci |
+--------------------------+--------------------+
10 rows in set (0.00 sec)

1 个解决方案

解决方案1
 1  2013-06-09 12:05:09

Answered in this forum by Zemi. Zemi在此论坛中回答。

http://forum.thymeleaf.org/UTF8MB4-character-encoding-not-working-td4026185.html#a4026187 http://forum.thymeleaf.org/UTF8MB4-character-encoding-not-working-td4026185.html#a4026187

utf8mb4 is just MySQL setting so I had to use UTF-8 in my application settings. utf8mb4只是MySQL设置，因此我必须在应用程序设置中使用UTF-8。

And I also needed URIEncoding="UTF-8" in my server.xml file. 而且我的server.xml文件中还需要URIEncoding =“ UTF-8”。 

<Connector connectionTimeout="20000" port="8983" protocol="HTTP/1.1" redirectPort="8443" URIEncoding="UTF-8"/>

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