常用JAVA方法大全

<%!
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);
}
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 = "";
}