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一些非常有用的JAVA常用方法

來源:互聯網網民  2008-05-31 12:10:33  評論

<%!

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://得到機器名字或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://處理空字符串

String dealNull(String str) {

String returnstr = null;

if (str == null) returnstr = "";

else returnstr = str;

return returnstr;

}

file://處理空對象

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://得到字符串長度

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(!

 
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  <%! 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://得到機器名字或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://處理空字符串 String dealNull(String str) { String returnstr = null; if (str == null) returnstr = ""; else returnstr = str; return returnstr; } file://處理空對象 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://得到字符串長度 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(!
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