简单的WebUtil函数

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用于对前台FormBean

import java.util.Date;//注意import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.beanutils.ConvertUtils;import org.apache.commons.beanutils.Converter;public class WebUtils {public static <T> T request2Bean(HttpServletRequest request,Class<T> beanClass){try {ConvertUtils.register(new Converter() {@Overridepublic Object convert(Class arg0, Object value) {if(value==null){return null;}String s=(String)value;if(s.trim().equals("")){return null;}SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");try {return sdf.parse(s);} catch (ParseException  e) {return null;}}}, Date.class);//如果出现500错误且是指向转换错，可能就是导错包了！T bean=beanClass.newInstance();Map map=request.getParameterMap();BeanUtils.populate(bean, map);return bean;} catch (Exception e) {System.out.println("WEB异常");throw new RuntimeException(e);}}}

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