通过反射自动封装表单字段

来源：互联网发布：mc什么意思网络用语编辑：程序博客网时间：2024/06/05 06:51
package cn.jbit.util;import java.beans.IntrospectionException;import java.beans.PropertyDescriptor;import java.io.UnsupportedEncodingException;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.net.URLDecoder;import java.text.SimpleDateFormat;import java.util.Collection;import java.util.Date;import java.util.Enumeration;import java.util.HashMap;import java.util.Map;import javax.imageio.spi.ServiceRegistry.Filter;import javax.servlet.http.HttpServletRequest;public class RequestUtil {public static Object getObject(HttpServletRequest request, Class clazz,String enc) throws UnsupportedEncodingException,IntrospectionException, InstantiationException, IllegalAccessException {Field[] fields = clazz.getDeclaredFields();Object obj = clazz.newInstance();request.setCharacterEncoding(enc);Map<String, String> map = new HashMap<String, String>();if (request.getMethod().equals("GET")) {System.out.println("-----------GET--------------------");String query = URLDecoder.decode(request.getQueryString(), enc);String[] str = query.split("&");for (String string : str) {try {map.put(string.split("=")[0], string.split("=")[1]);} catch (Exception e) {e.printStackTrace();}}} else {System.out.println("-----------POST--------------------");Map<String, String[]> parmmap = request.getParameterMap();for (String key : parmmap.keySet()) {try {map.put(key, parmmap.get(key)[0]);} catch (Exception e) {e.printStackTrace();}}}for (Field field : fields) {try {PropertyDescriptor pd = new PropertyDescriptor(field.getName(),clazz);Method seter = pd.getWriteMethod();if (field.getType().getName().equals(int.class.getName())|| field.getType().getName().equals(Integer.class.getName())) {seter.invoke(obj, Integer.valueOf(map.get(field.getName())));} else if (field.getType().getName().equals(Date.class.getName())) {SimpleDateFormat sdf = new SimpleDateFormat();Date date = sdf.parse(map.get(field.getName()));seter.invoke(obj, date);} else if (field.getType().getName().equals(Double.class.getName())|| field.getType().getName().equals(double.class.getName())) {seter.invoke(obj, Double.valueOf(map.get(field.getName())));} else if (field.getType().getName().equals(String.class.getName())) {seter.invoke(obj, map.get(field.getName()));}} catch (Exception e) {System.out.println("异常 了");}}return obj;}}
2 0