package cn.edu.hactcm.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Enumeration;
import java.util.List;
import java.util.UUID;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;
import cn.edu.hactcm.domain.User;
import cn.edu.hactcm.exception.WebException;
public final class WebUtils {
private WebUtils(){}
public static <T> T request2Bean(HttpServletRequest request, Class<T> beanClazz) {
try {
T bean = beanClazz.newInstance();
// TODO 要注意的是修改的数据相当于一条新的,应该把修改信息重新建一个表。
// TODO 在修改表中建立一个字段,用于参照原始数据的ID,每次修改删除原来记录重新添加新数据
// 看一下是否需要id‘
if(request.getParameter("id")==null)
BeanUtils.setProperty(bean, "id", makeUUID());
Enumeration e = request.getParameterNames();
while(e.hasMoreElements()) {
String name = (String) e.nextElement();
String value = request.getParameter(name);
BeanUtils.setProperty(bean, name, value);
}
return bean;
} catch (Exception e) {
throw new WebException(e);
}
}
@Deprecated
public static <T> T request2Bean_forComment(HttpServletRequest request,
Class<T> beanClazz) {
try {
T bean = beanClazz.newInstance();
// TODO 要注意的是修改的数据相当于一条新的,应该把修改信息重新建一个表。
// TODO 在修改表中建立一个字段,用于参照原始数据的ID,每次修改删除原来记录重新添加新数据
// 看一下是否需要id‘
Enumeration e = request.getParameterNames();
while(e.hasMoreElements()) {
String name = (String) e.nextElement();
String value = request.getParameter(name);
BeanUtils.setProperty(bean, name, value);
}
return bean;
} catch (Exception e) {
throw new WebException(e);
}
}
//这里使用了BeanUtils工具。
public static void copyBean(Object orig, Object dest) {
try {
// ConvertUtils.register(new DateLocaleConverter(), Date.class);
BeanUtils.copyProperties(dest, orig);
BeanUtils.setProperty(dest, "id", makeUUID());
} catch (Exception e) {
throw new RuntimeException(e);
}
}
//获取UUID,作为各表的id的值
public static String makeUUID() {
return UUID.randomUUID().toString();
}
// 将消息转发给 message.jsp 全局消息页面
public static void forward(String message, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setAttribute("message", message);
request.getRequestDispatcher("/WEB-INF/hactcmmobleshop/message.jsp").forward(request, response);
}
public static <T>T uploadrequest2Bean(HttpServletRequest request, Class<T> beanClazz) {
try {
T bean = beanClazz.newInstance();
//处理文件上传
//创建工厂
DiskFileItemFactory factory = new DiskFileItemFactory();
//创建文件上传组件
ServletFileUpload upload = new ServletFileUpload(factory);
if (!upload.isMultipartContent(request))
throw new WebException("not a upload form");
String id = makeUUID(); //这是phone的id
//获得远程发布手机信息的电脑的ip
String releaseip = request.getRemoteAddr();
String releasetime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
.format(new Date());
String brandname = "";
//添加手机添加者
User user = (User) request.getSession().getAttribute("user");
//看一看是否需要id
if (request.getParameter("id") == null)
BeanUtils.setProperty(bean, "id", id);
if (request.getParameter("releaseip") == null)
BeanUtils.setProperty(bean, "releaseip", releaseip);
if (request.getParameter("releasetime") == null)
BeanUtils.setProperty(bean, "releasetime", releasetime);
if (request.getParameter("userid") == null)
BeanUtils.setProperty(bean, "userid", user.getId());
//相将brandname属性设置为空,最后通过查询数据库查出
BeanUtils.setProperty(bean, "brandname", brandname);
//解析
List<FileItem> fileItems = upload.parseRequest(request);
for (FileItem item : fileItems) {
if (item.isFormField()) {
//封装到bean
String name = item.getFieldName();
String value = item.getString("utf-8");
BeanUtils.setProperty(bean, name, value);
} else {
//文件上传组件
String name = item.getFieldName();
//获得文件名
String filename = item.getName();
filename = filename.substring(filename.lastIndexOf("\\")+1);
// TODO 要将上传图片打散存放在不同的目录中,同时存的也不应该仅仅是jpg格式的
// TODO 在这个系统中还有一个错误,那就是不登陆也可以实现所有的功能,也可以实现发布消息,这个待完成,得使用细粒度权限控制
//图片相对于web应用的路径
String webPath = "/uploadphonepic/" + id + ".jpg";
//获得绝对路径
String path = request.getSession().getServletContext().getRealPath(webPath);
System.out.println(path);
File file = new File(path);
file.getParentFile().mkdirs(); // 创建目录
file.createNewFile(); // 创建文件
// 上传
InputStream in = item.getInputStream();
OutputStream out = new FileOutputStream(file);
Streams.copy(in, out, true);
// 删除临时文件
item.delete();
// 将图片的路径封装到bean
BeanUtils.setProperty(bean, name, webPath);
}
}
return bean;
} catch (Exception e) {
throw new WebException(e);
}
}
}