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Example Filter that binds spring-managed beans into the request

View SpringMappingFilter.java
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import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
 
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.XmlWebApplicationContext;
 
public class SpringMappingFilter implements Filter {
private ServletContext context;
 
public void destroy() { }
 
public void init(FilterConfig filterConfig) {
this.context = filterConfig.getServletContext();
}
 
public void doFilter(ServletRequest request, ServletResponse response, FilterChain filter)
throws IOException, ServletException {
// the Spring Context would have been configured by the SpringContextListener
 
ApplicationContext springContext = this.context.getAttribute(XmlWebApplicationContext.DEFAULT_CONFIG_LOCATION);
request.setAttribute("myBean", springContext.getBean("myBean");
 
filterChain.doFilter(request, response);
}
}
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