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一些非常有用的JAVA常用方法,可以省力很多啊!!

2001-05-16 17:33 1016 查看
 
<%!
stc_RSYB_Name stcRSYName1[];
stc_SYB_INF stcSYBINF1[];
%>

<%/*
   String p = (String) session.getValue("access");
   if (p==null || !p.equals("1")) {
     response.sendRedirect("error.htm");
     return;
   }*/
%>
<%!
file://得到机器名字或IP
String get_Myhostname(javax.servlet.http.HttpServletRequest request){
  String myhostname = null;
    try{
      myhostname = request.getRemoteHost();
      myhostname = myhostname.toUpperCase();
    }catch(Exception e){}
  return myhostname;
}
file://处理空字符串
  String dealNull(String str) {
    String returnstr = null;
    if (str == null) returnstr = "";
    else returnstr = str;
    return returnstr;
  }
file://处理空对象 
  Object dealNull(Object obj){
    Object returnstr = null;
    if (obj == null) returnstr = (Object)("");
    else returnstr = obj;
    return returnstr;
  }

  int dealEmpty(String s) {
    s = dealNull(s);
    if (s.equals("")) return 0;
    return Integer.parseInt(s);
  }

String replace(String str,String substr,String restr){
  String[] tmp = split(str,substr);
  String returnstr = null;
  if(tmp.length!=0) {
    returnstr = tmp[0];
    for(int i = 0 ; i < tmp.length - 1 ; i++)
      returnstr =dealNull(returnstr) + restr +tmp[i+1];
  }
  return dealNull(returnstr);
}  
   
String htmlEncode(String txt){
  txt = replace(txt,"&","&");
  txt = replace(txt,"&amp;","&");
  txt = replace(txt,"&quot;",""");
  txt = replace(txt,"/"",""");
  txt = replace(txt,"&lt;","<");
  txt = replace(txt,"<","<");
  txt = replace(txt,"&gt;",">");
  txt = replace(txt,">",">");
  txt = replace(txt,"&nbsp;"," ");
  txt = replace(txt," "," ");
  return txt;
}

String unHtmlEncode(String txt){
  txt = replace(txt,"&","&");
  txt = replace(txt,""","/"");
  txt = replace(txt,"<","<");
  txt = replace(txt,">",">");
  txt = replace(txt," "," ");
  return txt;
}

file://ALERT Function
  void sAlert(String title,String msg,String focus, JspWriter out){
   try {
      out.println("<script language='javascript'>");
      out.println("alert(/"" + title + "/" + /"//r//n/" + /"" + replace(replace(msg,"''","'"),"/"","///"") +"/");");
      out.println(focus);
      out.println("</script>");
   } catch(Exception e) { System.out.println(e);}
  }
file://CONFIRM Function
  void sConfirm(String title,String msg ,String location,JspWriter out){
    try{
        out.println("<script language='javascript'>");
  out.println("if(confirm(/"" + title + "/" + /"//r//n/" + /"" + replace(msg,"/"","///"") + "/")){" );
        out.println("var d = (new Date()).toString();");
  out.println(location + "+ d;");
        out.println("}");
        out.println("parent.document.form1.text1.select();");
        out.println("</script>");
   } catch (Exception e) { }
  }
 
file://得到字符串长度 
  int getStringLength(String s) {
   int p = 0;
    try {
      int iLength = 0;
      int irealLength = 0;
      int j = 0;
      p = s.getBytes("Shift_JIS").length;
    } catch(java.io.UnsupportedEncodingException e) {}
    return p;
  }

 void formatString(String s,int b,JspWriter out){
    b--;
    String t = "";
    try {
        int leng = getStringLength(s);
        int j = 0;
 if (leng > b) {
   for (int i = 1; i <= b ; i++) {
            t = s.substring(0,i);
     if (t.getBytes("Shift_JIS").length <= b ) {
       j++;
     } else break;
   }
          file://j = j+1;
          file://System.out.println("b=" + b + "----" + "j=" + j);
          for(int i = 0;i < j; i++){
            if(s.substring(i,i+1).equals(" "))
              out.print(" ");
            if(!s.substring(i,i+1).equals(" "))
       out.print(htmlEncode(s.substring(i,i+1)));
           }   
          if (s.substring(0,j).getBytes("Shift_JIS").length  == b){
            out.print("|");
          }else{
            out.print(" |");
          }
        } else {
   for (int  i = 0; i < b - leng ; i++)
            t = t + " ";
          for (int i = 0; i < s.length(); i++){
            if(s.substring(i,i+1).equals(" "))
              out.print(" ");
            if(!s.substring(i,i+1).equals(" "))
              out.print(htmlEncode(s.substring(i,i+1)));
          }
   out.print(htmlEncode(t + "|"));
       }
    } catch(Exception e){System.out.println("----" + e);}
  }

file://判断是否为数字
boolean isNumeric(String number)
{
 try
 {
  Integer.parseInt(number);
  return true;
 }
 catch(NumberFormatException sqo)
 {
  return false;
 }
}
file://判断是否为日期
String mk_date(String c_date,int c_mode)
{
 String wk_buf= "";
 String ToDay = "";
 try
 {
  ToDay = Integer.toString(java.util.Calendar.getInstance().get(java.util.Calendar.YEAR));
  switch(c_mode)
  {
   case 0:
   {
    wk_buf = c_date.substring(2, 4) + "/" + c_date.substring(4, 6);
             if (c_date.length() == 8)
    {
                 wk_buf = wk_buf + "/" + c_date.substring(6, 8);
             }
    break;
   }
   case 1:
   {
    for (int i=0; i<c_date.length();i++)
    {
              if (c_date.substring(i, i+1) == " ")
     {
                     wk_buf = wk_buf + "0";
                 }
     else
     {
                     wk_buf = wk_buf + c_date.substring(i, i+1);
                 }
    }
             c_date = wk_buf;
    wk_buf = "";
             if (c_date.substring(0, 1) != "0" )
    {
                 wk_buf = "19";
             }
    else
    {
                 wk_buf = "20";
             }
    
             wk_buf = wk_buf + c_date.substring(0, 2) + c_date.substring(3, 5);
    
             if (c_date.length() == 8)
    {
                  wk_buf = wk_buf + c_date.substring(6, 8);
 
4000
            }
    break;
   }
   case 2:
   {
    wk_buf = c_date.substring(0, 4) + c_date.substring(5, 7) + c_date.substring(8, 10);
    break;
   }
   case 3:
   {
    for(int i=0; i<c_date.length();i++ )
    {
                 if (c_date.substring(i, i+1) == " ")
     {
                     wk_buf = wk_buf + "0";
                 }
     else
     {
                     wk_buf = wk_buf + c_date.substring(i, i+1);
                 }
             }
             c_date = wk_buf;
             wk_buf = "";
             if (Integer.parseInt(c_date.substring(0,2)) > Integer.parseInt(ToDay.substring(2, 4)))
    {
                 wk_buf = Integer.toString(Integer.parseInt(ToDay.substring(0,2)) - 1);
             }
    else
    {
                 wk_buf = ToDay.substring(0,2);
             }
             wk_buf = wk_buf + c_date.substring(0,2) + c_date.substring(3,5);
             if (c_date.length() == 8)
    {
                 wk_buf = wk_buf + c_date.substring(6,8);
              }
    break;
   }
   case 4:
   {
    wk_buf = c_date.substring(0,4) + "/" + c_date.substring(4,6) + "/" + c_date.substring(6, 8);
    break;
   }
   case 5:
   {
    wk_buf = c_date.substring(0,4) + c_date.substring(5, 7);
    break;
   }
  }
 }
 catch(Exception e)
 {
  System.out.println("wrong : " + e);
 }
 return wk_buf;
}

int cInt(float stsid){
     int cInt = 0;
     try{
      int stsid1 = 0;
   if(stsid > 0){
      if((stsid - (int)stsid > 0) && (stsid - (int)stsid != 0.5))
         stsid1 = (int)(stsid + 0.5);
      if(stsid - (int)stsid == 0.5){
      if(((int)(stsid-0.5))%2 == 0)
         stsid1 = (int)(stsid - 0.5);
      else
            stsid1 = (int)(stsid + 0.5);
      }
            if(stsid - (int)stsid ==0)
      stsid1 = (int)stsid;
   }else{
      stsid = -stsid;
   if((stsid - (int)stsid > 0) && (stsid - (int)stsid != 0.5))
         stsid1 = - (int)(stsid + 0.5);
      if(stsid - (int)stsid == 0.5){
      if(((int)(stsid-0.5))%2 == 0)
         stsid1 = - (int)(stsid - 0.5);
      else
            stsid1 = - (int)(stsid + 0.5);
      }
            if(stsid - (int)stsid ==0)
      stsid1 = - (int)stsid;
   }
   cInt = stsid1;
  }catch(Exception e){}
  return cInt;
  }

 long cLng(float numb){
     int nu = 0;
     long cLng = 0;
     try{
        nu = cInt(numb);
        cLng = (long) nu;
     }catch(Exception e){}
     return cLng;
 }

 float dealFloat(String s){
    s=dealNull(s);
    if (s.equals(""))
 return 0;
    return Float.parseFloat(s); 
}

String[] split(String source,String div){
      int arynum = 0,intIdx=0,intIdex=0,div_length = div.length();    
      if(source.compareTo("")!=0){     
        if(source.indexOf(div)!=-1){      
         intIdx = source.indexOf(div);       
         for(int intCount =1 ; ; intCount++){       
           if(source.indexOf(div,intIdx+div_length)!=-1){
             intIdx= source.indexOf(div,intIdx+div_length);
             arynum = intCount;
             }
           else {arynum+=2;break;}
            }                   
       }else arynum =1;
      }else arynum = 0;
    
      intIdx=0;
      intIdex=0;
      String[] returnStr = new String[arynum];
    
      if(source.compareTo("")!=0){
     
       if(source.indexOf(div)!=-1){
      
        intIdx = (int)source.indexOf(div);
        returnStr[0]= (String)source.substring(0,intIdx);
     
        for(int intCount =1 ; ; intCount++){
           if(source.indexOf(div,intIdx+div_length)!=-1){
             intIdex=(int)source.indexOf(div,intIdx+div_length);
            
             returnStr[intCount] = (String)source.substring(intIdx+div_length,intIdex);
            
             intIdx = (int)source.indexOf(div,intIdx+div_length);
             }
           else {
                returnStr[intCount] = (String)source.substring(intIdx+div_length,source.length());
                break;
                }
            }
      }
      else {returnStr[0] = (String)source.substring(0,source.length());return returnStr;}
     }
     else {return returnStr;}                 
    return returnStr;   
}

public class stc_RSYB_Name
  {
    public int pos = -1;
    public String NAME = "";
    public String host = "";
    public String home1 = "";
    public String home2 = "";
    public String home3 = "";
  }
  public class stc_SYB_INF
  {
    String reg_name  = "";
    String G_SYB = "";
    String R_SYB = "";
  }
file://输出空格
void showBlank(int num,JspWriter out){
try{
 for(int i=0;i<=num;i++)
  out.print(" ");
}
catch(Exception e){}  
}

   String g_syb_mk(){
     String g_syb_mk = null;
     String NIS_M_O = "1???????????????????????????????????????????????????????????????";
  String LOCAL_M = "?1??????????????????????????????????????????????????????????????";
  String WINNT_DC = "????1???????????????????????????????????????????????????????????";
  String NIS_LOCAL = "11??????????????????????????????????????????????????????????????";
  int Ret = 0,RecCount = 0,K = 0;
  String Set_Ret = "ssy";
  String[] DOMEIN = null;
  String[] Group_SYB = null;
  int WK_SYB[];
  try{
    String sql = "select count(*) from 寁嶼婡 where 话兽庬暿 like '"+ NIS_M_O +"' or 话兽庬暿 like '" + LOCAL_M +"' or 话兽庬暿 like '"+WINNT_DC +"'";
    rs = stmt.executeQuery(sql);
    if(rs.next()){
      RecCount = rs.getInt(1);
   rs = null;
    }
    String sql2 = "select * from 寁嶼婡 where 话兽庬暿 like '"+ NIS_M_O +"' or 话兽庬暿 like '" + LOCAL_M +"' or 话兽庬暿 like '"+WINNT_DC +"'";
    while(rs.next()){
      int i = 0;
         DOMEIN[i] = rs.getString("霓也輺?);
   i++;
    }
    for(int j = 0 ; j < RecCount ; j++){
      String sql3 = "select * from 僌儖乕僾庬暿 where 霓也輺?= '" + DOMEIN[j] +"'";
   rs = stmt.executeQuery(sql3);
   if(rs.next()){
     K = K + 1;
     Group_SYB[K] = rs.getString("皋侔踢庬暿");
   }
    }
    for(int l = 0; l < 32; l++){
      for(int m = 0; m < K; m++){
     if(Group_SYB[m].substring(l,l+1).equals("1")){
       if(l==1){
      Set_Ret = "1";
    }else{
      Set_Ret = Set_Ret +  "1";
    }
    break;
     }else{
       if(m==K){
      if(l==1){
        Set_Ret = "0";
      }else{
        Set_Ret = Set_Ret + "0";
      }
    }
     }
   }
    }
    g_syb_mk = Set_Ret;
  }catch(Exception e) { }
   return  g_syb_mk;
  }

int reCount(String strtable,String Sel)
{
 String mySt="";
 int t = 0;
 ResultSet rsd=null;
 try
 {
  mySt= "select count(*) ads from " + strtable  + " " + Sel;
  rsd= conn.createStatement().executeQuery(mySt);
  if (rsd.next())
  {
   t=rsd.getInt("ads");
  }
 }
 catch(SQLException sqe)
 {
  System.out.println("ODBC Wrong :" + sqe +"+" +mySt);
 }
 rsd = null;
 return t;
 
}

int dCount(String duan,String strTable,String strSel)
{
 int t=0;
 ResultSet rss=null;
 try
 {
  String mySql="select count(*) ads from "  + strTable + " where " + strSel + " and "+ duan +" is not null ";
  rss= conn.createStatement().executeQuery(mySql);
  if (rss.next())
  {
   t=rss.getInt("ads");
  }
 }
 catch(Exception sqe)
 {
  System.out.println(sqe);
 }
 rss=null;
 return t;
}

String dLookup(String duan,String strTable,String strSel)
{
        String strReturn = null;
 ResultSet rss = null;
 try{
              String strsql = "select "+duan+" from "+strTable+" where "+ strSel;
       rss = conn.createStatement().executeQuery(strsql);
       if(rss.next()){
            
       strReturn = rss.getString(duan);
       }
 
 }catch(java.sql.SQLException sqle){
     System.out.println("dLookup_Exception:"+sqle);
 }
 
        rss = null;
 return strReturn;
}
String rTrim(String str){
     String rstr = str;
  if(str == null)
         {
    rstr = "";
  }
         else
         {
    if(str.length() == 0) rstr = "";
    if(str.length() > 0)
    {
      for(int i = str.length() ; i  >  0 ; i--)
             {
     if(str.substring(i-1,i).equals(" ")) 
       rstr = rstr.substring(0,i-1);
     else break;
   }
     } 
      
  }
  return rstr;
   }
 void sybinf_set(stc_RSYB_Name in_data, stc_SYB_INF out_data) throws java.sql.SQLException{
    String NEW_SYB = "00000000000000000000000000000000";
    out_data.reg_name = in_data.NAME;
    String sql = "";
    String rdomein1 = "";
    String rdomein2 = "";
    String rdomein3 = "";
    ResultSet rsf = null;
    Statement stf = conn.createStatement();
    try {
      sql = "Select 皋侔踢庬暿 From 僌儖乕僾庬暿 Where 霓也輺?= '" + in_data.host + "'";
      rsf = conn.createStatement().executeQuery(sql);
      if (rsf.next()) {
        out_data.G_SYB = dealNull(rsf.getString("皋侔踢庬暿"));
      } else {
        out_data.G_SYB = "";
      }
    } catch(java.sql.SQLException sqle) {
      System.out.println("111111" + sqle);
    }
    try {
      sql = "Select 棙梡庬暿 From 棙梡庬暿 Where 霓也輺?= '" + in_data.home1 + "'";
      rsf = stf.executeQuery(sql);
      if (rsf.next())
        rdomein1 = dealNull(rsf.getString("棙梡庬暿"));
    } catch(java.sql.SQLException sqle) {
      System.out.println("22222" + sqle);
    }
    try {
      sql = "Select 棙梡庬暿 From 棙梡庬暿 Where 霓也輺?= '" + in_data.home2 + "'";
      rsf = stf.executeQuery(sql);
      if (rsf.next())
        rdomein2 = dealNull(rsf.getString("棙梡庬暿"));
    } catch(java.sql.SQLException sqle) {
      System.out.println("333333" + sqle);
    }
    try {
      sql = "Select 棙梡庬暿 From 棙梡庬暿 Where 霓也輺?= '" + in_data.home3 + "'";
      rsf = stf.executeQuery(sql);
      if (rsf.next())
        rdomein3 = dealNull(rsf.getString("棙梡庬暿"));
    } catch(java.sql.SQLException sqle) {
      System.out.println("444444" + sqle);
    }
    rsf = null;
    stf = null;
    String p = Char_OR(rdomein1, rdomein2);
    if (p.equals("")) p = NEW_SYB;
    String q = Char_OR(p, rdomein3);
    if (q.equals("")) q = NEW_SYB;
    out_data.R_SYB = q;
  }
  String Char_OR(String arg1, String arg2) {
    int len1 = -1, len2 = -1, max_len = -1, min_len = -1;
    String ret_sts = "";
    int long_f = -1;
    len1 = arg1.length();
    len2 = arg2.length();
    if (len1 == 0 && len2 > 0)
      return arg2;
    else if (len1 > 0 && len2 == 0)
      return arg1;
    else if (len1 == 0 && len2 == 0)
      return "";
    ret_sts = "";
    if (len1 > len2) {
      max_len = len1;
      min_len = len2;
      long_f = 1;
    } else if (len1 < len2) {
       max_len = len2;
       min_len = len1;
       long_f = 2;
    } else {
       max_len = len1;
       min_len = len2;
       long_f = 0;
    }
    for (int i = 1; i <= max_len; i++) {
      if (i <= min_len) {
        if (arg1.substring(i-1, i).equals("1") || arg2.substring(i-1, i).equals("1"))
          ret_sts = ret_sts + "1";
        else
          ret_sts = ret_sts + "0";
      } else {
        if (long_f == 1)
          ret_sts = ret_sts + arg1.substring(i-1, i);
        else if (long_f == 2)
          ret_sts = ret_sts + arg2.substring(i-1, i);
      }
    }
    return ret_sts;
  }
%>

<%!
 void writeFile(String myString,String target_file){
     try {
   java.io.PrintWriter pw = new java.io.PrintWriter(new java.io.FileOutputStream(target_file));
   pw.println(myString);
   pw.close();
   myString="";
   } catch(java.io.IOException e) {
     System.out.println(e.getMessage());
 }
  } 
 %>
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