基于java的音乐平台网站

【实例截图】

【核心代码】

package util;



import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Random;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import dao.CommDAO;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;


public class Info {


 


//public static String popheight = "alliframe.height=document.body.clientHeight ";
public static String popheight = "alliframe.style.height=document.body.scrollHeight ";

    public static HashMap getUser(HttpServletRequest request)
    {
    HashMap map = (HashMap)(request.getSession().getAttribute("username")==null?request.getSession().getAttribute("user"):request.getSession().getAttribute("username"));
        return map;
    }


public static int getBetweenDayNumber(String dateA, String dateB) {
long dayNumber = 0;
//1小时=60分钟=3600秒=3600000
long mins = 60L * 1000L;
//long day= 24L * 60L * 60L * 1000L;计算天数之差
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");
try {
   java.util.Date d1 = df.parse(dateA);
   java.util.Date d2 = df.parse(dateB);
   dayNumber = (d2.getTime() - d1.getTime()) / mins;
} catch (Exception e) {
   e.printStackTrace();
}
return (int) dayNumber;
}

public static void main(String[] g )
{
System.out.print(Info.getBetweenDayNumber("2012-11-11 11:19", "2012-11-11 11:11"));
}



public static String getselect(String name,String tablename,String zdname)
{
String select = "<select name=\"" name "\" id=\"" name "\" >";
for(HashMap permap:new CommDAO().select("select * from " tablename " order by id desc")){ 
select ="<option value=\"" permap.get(zdname) "\">" permap.get(zdname) "</option>";
}
select ="</select>";
return select;
}
  public static String getselectsl(String name,String tablename,String zdname)
{
String select = "<select name=\"" name "\" id=\"" name "\" onchange='gow();'>";
select ="<option value=''>请选择</option>";

for(HashMap permap:new CommDAO().select("select * from " tablename " order by id desc")){ 
select ="<option value=\"" permap.get(zdname) "\">" permap.get(zdname) "</option>";
}
select ="</select>";
return select;
}
 
public static String getselect(String name,String tablename,String zdname,String where)
{
  
String select = "<select name=\"" name "\" id=\"" name "\" >";
select ="<option value=\"\">不限</option>";
for(HashMap permap:new CommDAO().select("select * from " tablename " where " where " order by id desc")){ 
String optionstr = "";

if(zdname.split(";").length==1){
  
optionstr=permap.get(zdname.split("~")[0]).toString();

  
}else{
for(String str:zdname.split(";"))
{
String zdstr = str.split("~")[0];
String zdnamestr = str.split("~")[1].equals("无名")?"":(str.split("~")[1] ":");
optionstr =zdnamestr permap.get(zdstr) " - ";
} 
}
 
 
 
if(optionstr.indexOf(" - ")>-1)optionstr=optionstr.substring(0,optionstr.length()-3);
select ="<option value=\"" optionstr "\">" optionstr "</option>";
}
select ="</select>";
return select;
}
 
public static String getradio(String name,String tablename,String zdname,String where)
{ 
String radio="";
int dxii = 0;
for(HashMap permap:new CommDAO().select("select * from " tablename " where  " where " order by id desc")){ 
String check="";
if(dxii==0)check="checked=checked";
 
String optionstr = "";
for(String str:zdname.split(";"))
{
String zdstr = str.split("~")[0];
String zdnamestr = str.split("~")[1].equals("无名")?"":(str.split("~")[1] ":");
optionstr =zdnamestr permap.get(zdstr) " - ";
}
if(optionstr.length()>0)optionstr=optionstr.substring(0,optionstr.length()-3);
 
radio ="<label><input type='radio' name='" name "' " check " value=\"" optionstr "\">" optionstr "</label>\n";
dxii ;
}
return radio;
}
 
 
public static void writeExcel(String fileName,String prosstr,java.util.List<List> plist,HttpServletRequest request, HttpServletResponse response){    
        WritableWorkbook  wwb = null;    
        String cols = "";
        for(String str:prosstr.split("@"))
        {
        cols =str.split("-")[0] ",";
        }
        cols = cols.substring(0,cols.length()-1);
        String where = request.getAttribute("where")==null?"":request.getAttribute("where").toString();
        List<List> mlist = new CommDAO().selectforlist("select " cols " from " fileName " " where "  order by id desc");
        
        fileName = request.getRealPath("/") "/upfile/" Info.generalFileName("a.xls");
        String[] pros = prosstr.split("@");
        try {    
            //首先要使用Workbook类的工厂方法创建一个可写入的工作薄(Workbook)对象    
            wwb = Workbook.createWorkbook(new File(fileName));    
        } catch (IOException e) {    
            e.printStackTrace();    
        }    
        if(wwb!=null){    
            //创建一个可写入的工作表    
            //Workbook的createSheet方法有两个参数，第一个是工作表的名称，第二个是工作表在工作薄中的位置    
            WritableSheet ws = wwb.createSheet("sheet1", 0);    
            ws.setColumnView(0,20);
            ws.setColumnView(1,20);
            ws.setColumnView(2,20);
            ws.setColumnView(3,20);
            ws.setColumnView(4,20);
            ws.setColumnView(5,20);

            try {
            
           
            for(int i=0;i<pros.length;i )
            {
            Label label1 = new Label(i, 0,"");
            
            label1.setString(pros[i]);
            ws.addCell(label1);
            }
            
            } catch (RowsExceededException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (WriteException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}    
             //下面开始添加单元格  
int i=1;
            for(List t:mlist){  
            try {
           
            Iterator it = t.iterator();
            int jj=0;
            while(it.hasNext())
            {
            Label label1 = new Label(jj, i,"");
           
            String a = it.next().toString();
            label1.setString(a);
            ws.addCell(label1);
            jj ;
            }
            
            i ;
            } catch (RowsExceededException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (WriteException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}    
            }    
   
            try {    
                //从内存中写入文件中    
                wwb.write();    
                //关闭资源，释放内存    
                wwb.close();    
            } catch (IOException e) {    
                e.printStackTrace();    
            } catch (Exception e) {    
                e.printStackTrace();    
            }    
        }
        
        try {
response.sendRedirect("upload?filename=" fileName.substring(fileName.lastIndexOf("/") 1));
} catch (IOException e) {
e.printStackTrace();
}
        
    }    
 
 
public static String getcheckbox(String name,String tablename,String zdname,String where)
{ 
String checkbox="";
for(HashMap permap:new CommDAO().select("select * from " tablename " where " where " order by id desc")){ 
 
String optionstr = "";
for(String str:zdname.split(";"))
{
String zdstr = str.split("~")[0];
String zdnamestr = str.split("~")[1].equals("无名")?"":(str.split("~")[1] ":");
optionstr =zdnamestr permap.get(zdstr) " - ";
}
if(optionstr.length()>0)optionstr=optionstr.substring(0,optionstr.length()-3);
 
checkbox ="<label><input type='checkbox' name='" name "' value=\"" optionstr "\">" optionstr "</label>\n";
}
checkbox ="<input type=hidden name='" name "' value='' />";
return checkbox;
}
 
 
public static String getCombox(String tablename,String zdname,String where)
{ 
String checkbox="";
for(HashMap permap:new CommDAO().select("select * from " tablename " where " where " order by id desc")){ 
 
String optionstr = "'";
for(String str:zdname.split(";"))
{
if(str.indexOf("~")>-1){
String zdstr = str.split("~")[0];
String zdnamestr = str.split("~")[1].equals("无名")?"":(str.split("~")[1] ":");
optionstr =zdnamestr permap.get(zdstr) " - ";
}else{ 
optionstr =permap.get(str); 
}
}
if(optionstr.length()>0)optionstr=optionstr.substring(0,optionstr.length()-3);
optionstr ="',";
checkbox = optionstr;
}
if(checkbox.length()>0)checkbox=checkbox.substring(0,checkbox.length()-1);
 
return checkbox;
}
 
 
 
 
public static String getcheckboxDk(String name,String tablename,String zdname,String nstr,String where)
{ 
String checkbox="";
int i=0;
for(HashMap permap:new CommDAO().select("select * from " tablename " where " where " order by id desc")){ 
 
String optionstr = "";
for(String str:zdname.split(";"))
{
String zdstr = str.split("~")[0];
String zdnamestr = str.split("~")[1].equals("无名")?"":(str.split("~")[1] ":");
optionstr =zdnamestr permap.get(zdstr) " - ";
}
if(optionstr.length()>0)optionstr=optionstr.substring(0,optionstr.length()-3);
String nbs = "";
if(i>0)nbs="&nbsp;";
checkbox ="<label>" nbs "<input type='checkbox' name='" name "' value=\"" optionstr "\">" optionstr "</label>&nbsp;&nbsp;\n";
checkbox ="<label>&nbsp;- " nstr " &nbsp;<input type='text' size='5' name='" optionstr "' value=\"\"></label><br />\n";
i ;
}
checkbox ="<input type=hidden name='" name "' value='' /><input type=hidden name='dk-" name "-value' value='" nstr "' />";
return checkbox;
}
 

public static String getFileUpInfo()
{
String jscode = "";
jscode ="<script src=js/popup.js></script>";
jscode ="<font onclick=\"uploaddoc()\" src=\"js/nopic.jpg\" style='cursor:hand' id=txt >点击此处上传</font>";
jscode ="&nbsp;&nbsp;<input type=text readonly style='border:0px' size=30  name=\"docname\" id=\"docname\" value=\"\" />";
return jscode;
}
 
public static String getFileUpInfo2()
{
String jscode = "";
jscode ="<script src=js/popup.js></script>";
jscode ="<font onclick=\"uploaddoc2()\" src=\"js/nopic.jpg\" style='cursor:hand' id=filetxt2 >点击此处上传</font>";
jscode ="&nbsp;&nbsp;<input type=text readonly style='border:0px' size=30  name=\"docname2\" id=\"docname2\" value=\"\" />";
return jscode;
}
 
public static String getFileUpInfo3()
{
String jscode = "";
jscode ="<script src=js/popup.js></script>";
jscode ="<font onclick=\"uploaddoc3()\" src=\"js/nopic.jpg\" style='cursor:hand' id=filetxt3 >点击此处上传</font>";
jscode ="&nbsp;&nbsp;<input type=text readonly style='border:0px' size=30  name=\"docname3\" id=\"docname3\" value=\"\" />";
return jscode;
}

  public static String tform(HashMap map,String formname)
{
    String jscode = "";
    try{
    jscode ="<script type=\"text/javascript\">\n";
    jscode ="function getPvalue()\n";
    jscode ="{\n";
   
    Set set = map.entrySet();
    Iterator it = set.iterator();
    while(it.hasNext())
    {
      String pm=((Object)it.next()).toString();
      String str1 = "";
      String str2 = "";
      String[] strs = pm.split("=");
      str1 = strs[0];
      if(strs.length==1)str2="";
      if(strs.length==2)str2=strs[1];
      str2 = str2.replaceAll("\r\n", "---");
// str2 = str2.replaceAll("\"", "'");
     
      if(!str1.equals("content")){
      
      jscode =" if(document.getElementsByName(\"" str1 "\").length>1)\n";
      jscode =" {\n";
      jscode =" var radios = document.getElementsByName(\"" str1 "\");\n";
     
      jscode =" if(radios[0].type=='radio'){\n";
      jscode =" for(var i=0;i<radios.length;i )\n";
      jscode =" {\n";
      jscode =" if(radios[i].value==\"" str2 "\")\n";
      jscode =" {\n";
      jscode =" radios[i].checked=\"checked\";\n";
      jscode =" }\n";
      jscode =" }\n";
      jscode =" }\n";
       
      
      jscode =" if(radios[0].type=='checkbox'){\n";
      
      
      
      jscode =" for(var i=0;i<radios.length;i )\n";
      jscode =" {\n"; 
      jscode =" if(\"" str2 "\".indexOf(radios[i].value)>-1&&radios[i].id.indexOf('choosebox')==-1)\n";
      jscode =" {\n";
      
      jscode =" radios[i].checked=\"checked\";\n";
      
     
      if(str2.indexOf(" - ")>-1){
    for(String strch:str2.split(" ~ ")){  
      
      String strchname = strch.substring(0,strch.lastIndexOf(" - "));
      jscode =" if(document.getElementsByName('" strchname "').length>0)\n";
      jscode =" {\n";
      jscode =" document.getElementsByName('" strchname "')[0].value='" strch.substring(strch.lastIndexOf(":") 1) "';\n";
      jscode =" }\n";
      
      
    }
    }
      
      
      jscode =" }\n";
      jscode =" }\n";
      jscode =" }\n";
      
      jscode =" if(radios.type=='select'){\n";
      jscode =" " formname "." str1 ".value=\"" str2 "\";\n";
      jscode =" }\n";
      
      
      jscode =" }else{\n";
      jscode =" if(" formname "." str1 ")\n";
      jscode ="{\n";
      jscode ="" formname "." str1 ".value=\"" str2 "\";\n";
      jscode ="}\n";
      jscode ="}\n";
      
   
      jscode ="if(document.getElementById(\"txt\"))\n";
      jscode ="{\n";
      jscode ="document.getElementById(\"txt\").src=\"upfile/" map.get("filename") "\";\n";
      jscode ="}\n";
      
      jscode ="if(document.getElementById(\"txt2\"))\n";
      jscode ="{\n";
      jscode ="document.getElementById(\"txt2\").src=\"upfile/" map.get("filename2") "\";\n";
      jscode ="}\n";
      
      jscode ="if(document.getElementById(\"txt3\"))\n";
      jscode ="{\n";
      jscode ="document.getElementById(\"txt3\").src=\"upfile/" map.get("filename3") "\";\n";
      jscode ="}\n";
      
      jscode ="if(document.getElementById(\"txt4\"))\n";
      jscode ="{\n";
      jscode ="document.getElementById(\"txt4\").src=\"upfile/" map.get("filename4") "\";\n";
      jscode ="}\n";
      
      jscode ="if(document.getElementById(\"txt5\"))\n";
      jscode ="{\n";
      jscode ="document.getElementById(\"txt5\").src=\"upfile/" map.get("filename5") "\";\n";
      jscode ="}\n";
      
      }
    }
      
      jscode ="}\n";
   
     
     
    jscode =" getPvalue();\n";
    jscode ="</script>\n";
    }catch (Exception e) {
e.printStackTrace();
}
      return jscode;
}
    


public static String generalFileName(String srcFileName) {
try{
   int index=srcFileName.lastIndexOf(".");
   return StrUtil.generalSrid() srcFileName.substring(index).toLowerCase();
}catch(Exception e){
return StrUtil.generalSrid();
}
}

public synchronized static String getID() {

Random random = new Random();
StringBuffer ret = new StringBuffer(20);
java.util.Date date = new java.util.Date();
java.text.SimpleDateFormat format = new java.text.SimpleDateFormat("MMddHHmmss", java.util.Locale.CHINA);
ret.append(format.format(date));
String rand = String.valueOf(Math.abs(random.nextInt()));
//ret.append(getDateStr());
ret.append(rand.substring(0,4));

return ret.toString();
} 





public static String getImgUpInfo(int height)
{
String jscode = "";
jscode ="<img style=\"cursor: pointer;margin:3px\" onclick=\"uploadimg()\" src=\"js/nopic.jpg\" id=txt height=\"" height "\"/>";
jscode ="<input type=hidden name=\"filename\" id=\"filename\" value=\"\" />";
jscode ="<script type=\"text/javascript\"  src=\"js/popups.js\"></script>";
return jscode;
}



public static String getImgUpInfo2(int height)
{
String jscode = "";
jscode ="<img style=\"cursor: hand\" onclick=\"uploadimg2()\" src=\"js/nopic.jpg\" id=txt2 height=\"" height "\"/>";
jscode ="<input type=hidden name=\"filename2\" id=\"filename2\" value=\"\" />";
jscode ="<script type=\"text/javascript\"  src=\"js/popup.js\"></script>";
return jscode;
}

public static String getImgUpInfo3(int height)
{
String jscode = "";
jscode ="<img style=\"cursor: hand\" onclick=\"uploadimg3()\" src=\"js/nopic.jpg\" id=txt3 height=\"" height "\"/>";
jscode ="<input type=hidden name=\"filename3\" id=\"filename3\" value=\"\" />";
jscode ="<script type=\"text/javascript\"  src=\"js/popup.js\"></script>";
return jscode;
}

public static String getImgUpInfo4(int height)
{
String jscode = "";
jscode ="<img style=\"cursor: hand\" onclick=\"uploadimg4()\" src=\"js/nopic.jpg\" id=txt4 height=\"" height "\"/>";
jscode ="<input type=hidden name=\"filename4\" id=\"filename4\" value=\"\" />";
jscode ="<script type=\"text/javascript\"  src=\"js/popup.js\"></script>";
return jscode;
}

public static String getImgUpInfo5(int height)
{
String jscode = "";
jscode ="<img style=\"cursor: hand\" onclick=\"uploadimg5()\" src=\"js/nopic.jpg\" id=txt5 height=\"" height "\"/>";
jscode ="<input type=hidden name=\"filename5\" id=\"filename5\" value=\"\" />";
jscode ="<script type=\"text/javascript\"  src=\"js/popup.js\"></script>";
return jscode;
}

public static String fck(int height,String content)
{
String jscode = "<TEXTAREA   name=\"content\" id=\"content\">" content "</TEXTAREA>";
jscode ="<script type=\"text/javascript\"  src=\"fckeditor/fckeditor.js\"></script>";
jscode ="<script language=\"javascript\">";
jscode ="function fckinit()";
jscode ="{";
jscode =" var of = new FCKeditor(\"content\");";
jscode ="of.BasePath=\"fckeditor/\";";
jscode ="of.Height = \"" height "\";";
jscode ="of.ToolbarSet=\"Default\";";
jscode ="of.ReplaceTextarea();";
jscode ="}";
jscode ="fckinit();";
jscode ="</script>";

return jscode;
}


public synchronized static String subStr(String source,int length) {
if(source.length()>length)
{
source=source.substring(0,length) "...";
}

return source;
} 


public synchronized static String ensubStr(Object source,int length) {
String msource = Info.filterStrIgnoreCase(source.toString(), "<", ">");
if(msource.length()>length)
{
msource=msource.substring(0,length) "...";
} 
return msource;
} 



public static String getDateStr(){
String dateString="";
try{//yyyyMMddHHmmss
java.text.SimpleDateFormat formatter=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
java.util.Date currentTime_1=new java.util.Date();
dateString=formatter.format(currentTime_1);
}catch(Exception e){
     }
return dateString;
} 





public static String getUTFStr(String str) {
if(str==null){
return "";
}
 
try {
str =  new String(str.getBytes("ISO-8859-1"),"gb2312");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return str;
}
 
public static String getGBKStr(String str) throws UnsupportedEncodingException{
if(str==null){
return "";
}
return  new String(str.getBytes("ISO-8859-1"),"GBK");
}
 
public static String getGB2312Str(String str) throws UnsupportedEncodingException{
if(str==null){
return "";
}
return  new String(str.getBytes("ISO-8859-1"),"gb2312");
}

 
/**
*得到多少天之后之前的日期??
* @param String date
* @param int day
* @return
*/
public static String getDay(String date,int day) {
String b = date.substring(0,10);
String c = b.substring(0,4);
String d = b.substring(5,7);
String f = b.substring(8,10);
String aa = c "/" d "/" f;
String a = "";
DateFormat dateFormat =  DateFormat.getDateInstance(DateFormat.MEDIUM);
GregorianCalendar grc=new GregorianCalendar();
grc.setTime(new Date(aa));
            grc.add(GregorianCalendar.DAY_OF_MONTH,day);
            String resu = dateFormat.format(grc.getTime());
        String t[]= resu.split("-");
        String sesuu = "";
        for(int i=0;i<t.length;i )
        {
        if(t[i].length()==1)
        {
        t[i]="0" t[i];
        }
        sesuu = t[i] "-";
        }
        
return sesuu.substring(0,10);
}


    
    
    /**
* 计算两个时期之间的天数
* 
*/
    public static int dayToday(String DATE1, String DATE2) {
       int i = 0;
       if(DATE1.indexOf(" ")>-1)
       DATE1 = DATE1.substring(0,DATE1.indexOf(" "));
       if(DATE2.indexOf(" ")>-1)
       DATE2 = DATE2.substring(0,DATE2.indexOf(" "));
       
       String[] d1 = DATE1.split("-");
       if(d1[1].length()==1)
       {
       DATE1 = d1[0] "-0" d1[1];
       }else{
       DATE1 = d1[0] "-" d1[1];
       }
       
       if(d1[2].length()==1)
       {
       DATE1 = DATE1 "-0" d1[2];
       }else{
       DATE1 = DATE1 "-" d1[2];
       }
       
       String[] d2 = DATE2.split("-");
       if(d2[1].length()==1)
       {
       DATE2 = d2[0] "-0" d2[1];
       }else{
       DATE2 = d2[0] "-" d2[1];
       }
       
       if(d2[2].length()==1)
       {
       DATE2 = DATE2 "-0" d2[2];
       }else{
       DATE2 = DATE2 "-" d2[2];
       }
       
       
       for(int j=0;j<10000;j )
       {
    i=j;
    String gday = Info.getDay(DATE1, j);
    if(gday.equals(DATE2))
    {
    break;
    }
       }
        return i;
    }
    
   
    

    /**
* 比较时间大小
* 
*/
    public static String compare_datezq(String DATE1, String DATE2) {
       DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date dt1 = df.parse(DATE1);
            Date dt2 = df.parse(DATE2);
            if (dt1.getTime() > dt2.getTime()) {
               
                return "big";
            } else if (dt1.getTime() < dt2.getTime()) {
              
                return "small";
            } else {
                return "den";
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
        return "den";
    }
    
    /**
* 过滤html代码
* 
*/
    public static String filterStrIgnoreCase(String source, String from, String to){
        String sourceLowcase=source.toLowerCase();
        String sub1,sub2,subLowcase1,subLowcase2;
        sub1=sub2=subLowcase1=subLowcase2="";
        int start=0,end;
        boolean done=true;
        if(source==null) return null;
        if(from==null||from.equals("")||to==null||to.equals("")) 
         return source;
        while(done){
         start=sourceLowcase.indexOf(from,start);
         if(start==-1) {
          break;
         }
         subLowcase1=sourceLowcase.substring(0,start);
         sub1=source.substring(0,start);
         end=sourceLowcase.indexOf(to,start);
         if(end==-1){
          end=sourceLowcase.indexOf("/>",start); 
          if(end==-1) {
           done=false;
          }
         }
         else{
          end=end to.length();
          subLowcase2=sourceLowcase.substring(end,source.length());
          sub2=source.substring(end,source.length());
          sourceLowcase=subLowcase1 subLowcase2;
          source=sub1 sub2;
         }
         //System.out.println(start " " end);
        }
        return source;
   }
    
   
    public static void delPic(String path,String img)
{
if(img!=null)
{
if(!img.equals(""))
{
  File file1=new File(path "/" img); 
       if(file1.exists() ) {
    file1.deleteOnExit();
         file1.delete(); 
       }}}
}
    
    
     



}