如何解決Spring MVC中的UTF-8編碼問題？

Spring MVC UTF-8 Encoding Issue

When attempting to display UTF-8 characters on a JSP page using Spring MVC, an encoding issue may arise. This issue often stems from an improper setup of the encoding configuration.

Resolution:

To resolve this issue, ensure the following steps are taken:

1. Register the CharacterEncodingFilter in web.xml:

   • Add the following filter to the top of the web.xml file:

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

2. Configure URIEncoding in server.xml (Tomcat-specific):

   • If using Tomcat, open the server.xml file and ensure that the URIEncoding is set to UTF-8:

     <Connector ... URIEncoding="UTF-8" ... />

Additional Notes:

• Using \u00f6lm instead of ölm in the controller can resolve the encoding issue, but it may indicate that the .java files are encoded using an incorrect character set.
• To change the encoding in Eclipse, open the Project Properties window, navigate to the "Text Files" section, and select "Other" for the "Encoding" option. Then, choose UTF-8 encoding.

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