import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class CharacterEncodingFilter implements Filter{
private FilterConfig config;
private String encoding;
private boolean enable;
public void destroy() {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain filterChain) throws IOException, ServletException {
if(this.enable){
request.setCharacterEncoding(encoding);
response.setCharacterEncoding(encoding);
}
filterChain.doFilter(request, response);
}
public void init (FilterConfig config ) throws ServletException {
this.config = config;
loadConfigParams();
}
private void loadConfigParams() {
this.encoding= this.config.getInitParameter("enconding");
String flag = this.config.getInitParameter("enable");
if(flag.equalsIgnoreCase("true")){
this.enable = true;
}else{
this.enable = false;
}
}
}
web.xml
<filter>
<filter-name>encondingFilter</filter-name>
<filter-class>com.morning.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>enconding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>enable</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encondingFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>