triminterceptor.java

办公自动化项目

package hong.javanet.util.interceptor;

import hong.javanet.frame.Interceptor;
import hong.javanet.frame.Command;
import hong.javanet.frame.PreInterceptorException;
import hong.javanet.frame.PostInterceptorException;
import java.beans.PropertyDescriptor;
import org.apache.commons.beanutils.PropertyUtils;
import hong.javanet.aop.DynamicProxyHandler;

public class TrimInterceptor        //    implements Interceptor {
        extends DynamicProxyHandler {
    /**
     * doPreCommand
     *
     * @param command Command
     * @throws PreInterceptorException
     * @todo Implement this hong.javanet.frame.Interceptor method
     */
//    public void doPreCommand(Command command) throws PreInterceptorException {
    public void doPreCommand(Object command) throws PreInterceptorException {
        PropertyDescriptor[] pds = PropertyUtils.getPropertyDescriptors(command);

        for (int i = 0; i < pds.length; i++) {
            if (pds[i].getPropertyType().equals(String.class)
                && pds[i].getWriteMethod() != null
                && pds[i].getReadMethod() != null) {
                try {
                    String val = (String) PropertyUtils.getProperty(command,
                            pds[i].getName());
                    if (val != null) {
                        val = val.trim();
                    }
//          else {
//            val = "";
//          }
                    PropertyUtils.setProperty(command, pds[i].getName(), val);
                } catch (Exception ex) {
                    throw new PreInterceptorException("拦截空字符出错！", ex);
                }
            }
        }
    }
}