第一種方法依賴於tomcate6中webapps\examples\WEB-INF\classes\filters下SetCharacterEncodingFilter這個類

實現方法在web.xml 中新增以下程式碼

<filter>
  <filter-name>CharacterEncodingFilter</filter-name>
  <filter-class>com.filter.CharacterEncodingFilter</filter-class>
 <init-param>
 <param-name>encoding</param-name>
 <param-value>UTF-8</param-value>
 </init-param>
  </filter>
 <filter-mapping>
  <filter-name>CharacterEncodingFilter</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>

第二種使用spring中自帶的一個設定編碼的過濾器

實現方法在web.xml中新增以下程式碼

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

第三種方法因為在配置springmvc時寫過如下程式碼

<servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:springmvc-servlet.xml</param-value>
  </init-param>
  
  </servlet>
  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>*.action</url-pattern>
  </servlet-mapping>

因此第三種方法可以修改DispatcherServlet類  修改如下：

  
import javax.servlet.ServletConfig;  
import javax.servlet.ServletException;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
import org.springframework.web.servlet.DispatcherServlet;  
  
public class EncodingDispatcherServlet extends DispatcherServlet {  
 private String encoding;  
  
 public void init(ServletConfig config) throws ServletException {  
  encoding = config.getInitParameter("encoding");  
 super.init(config);  
 }  
  
 protected void doService(HttpServletRequest request, HttpServletResponse response) throws Exception {  
 request.setCharacterEncoding(encoding);  
 super.doService(request, response);  
 }  
}

然後將web.xml中配置改為:

 <servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:springmvc-servlet.xml</param-value>
  </init-param>
  <init-param>
 <param-name>encoding</param-name>
 <param-value>UTF-8</param-value>
    </init-param>
  
  </servlet>
  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>*.action</url-pattern>
  </servlet-mapping>

get亂碼提交：

第一種方法：

修改tomcat配置檔案新增編碼與工程編碼一致，如下：

<Connector URIEncoding="utf-8"connectionTimeout="20000" port="8080"protocol="HTTP/1.1" redirectPort="8443"/>

第二種方法提交

String userName new;

String(request.getParamter("userName").getBytes("ISO8859-1"),"utf-8")