우주정복 시작

<input type="input" th:field="*{str}" th:onkeyup="|javascript:fnBlockBlank(this);|" th:onchange="|javascript:fnBlockBlank(this);|"/>

<script type="text/javascript">
    // 공백 체크
    function fnBlockBlank(obj) {
        var str_space = /\s/;
        if(obj.value == "")
        {   
            obj.focus();
            obj.value = 1;
            return false;
        }
    }

 

//가운데 공백 입력 x

function fnBlockBlank(obj) 
{             
    var str_space = /\s/;
    if(str_space.exec(obj.value)) 
    { 
alert("해당 항목에는 공백을 사용할 수 없습니다.\n\n공백 제거됩니다.");
obj.focus();
obj.value = obj.value.replace(' ',''); // 공백제거
return false;
    }
}
</script>

int page 1;

int start = 1 + (page-1)*10;     // 1, 11, 21, 31, ..
int end = 10*page; // 10, 20, 30, 40...

//페이지 계산 공식 적용...
// totalPage = totalCount / size ...
// 마지막 페이지 ...
/ 최초 페이지 ..

select * from INFORMATION_SCHEMA.columns

라디오 버튼

$("input[name='gubun']").attr("onclick", "return(false);");

콤보 박스
$("select[name='workCd']").attr("onfocus", "this.initialSelect = this.selectedIndex;");
$("select[name='workCd']").attr("onchange", "this.selectedIndex = this.initialSelect;");

오류 메세지

org.apache.jasper.JasperException: Unable to compile class for JSP: 

The code of method _jspService(HttpServletRequest, HttpServletResponse) is exceeding the 65535 bytes limit

해결 방법

web.xml에

<servlet>

 <servlet-name>jsp</servlet-name>

 <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>

  <init-param>

   <param-name>mappedfile</param-name>

   <param-value>false</param-value>

  </init-param>

</servlet>

<select name="test" onFocus="this.initialSelect = this.selectedIndex;" onChange="this.selectedIndex = this.initialSelect;">

할인된 숫자 구하기

var price= 금액 - (Math.floor((금액 * 할인율) / 100));

할인율 구하기

var discount = Math.floor(100-(할인 후 금액*100/원래 금액));

JAVA

Calendar cal = Calendar.getInstance();

//월의 마지막

String lastDay = String.valueOf(cal.getActualMaximum(Calendar.DAY_OF_MONTH));

//요일의 마지막

cal.add(Calendar.DATE, 7 - cal.get(Calendar.DAY_OF_WEEK));

//~몇년 ~몇개월 구하기

function dateDiff(startDate) {

    var startDate = "2018-10-17";

    var endDate = new Date();

    var diffDate_1 = startDate instanceof Date ? startDate : new Date(startDate);

    var diffDate_2 = endDate instanceof Date ? endDate : new Date(endDate);

    diffDate_1 = new Date(diffDate_1.getFullYear(), diffDate_1.getMonth(), diffDate_1.getDate());

    diffDate_2 = new Date(diffDate_2.getFullYear(), diffDate_2.getMonth(), diffDate_2.getDate());

    var diff = diffDate_2.getTime() - diffDate_1.getTime();

    var d = new Date();

    d.setTime(diff);

    console.log("년 : " +Math.floor(d.getFullYear()-1970));

    console.log("월 : " +parseInt(d.getMonth()));

}

//날짜, 월, 달, 일 차이 구하기

function dateDiff2() {

var input1="20170101"; 

var input2="20181017";

var date1 = new Date(input1.substr(0,4),input1.substr(4,2)-1,input1.substr(6,2)); 

var date2 = new Date(input2.substr(0,4),input2.substr(4,2)-1,input2.substr(6,2)); 

var interval = date2 - date1; 

var day = 1000*60*60*24; 

var month = day*30; 

var year = month*12; 

console.log("기간 날짜수: " + parseInt(interval/day) + "일"); 

console.log("기간 개월수: 약 " + parseInt(interval/month) + "개월"); 

console.log("기간 개년수: 약 " + parseInt(interval/year) + "개년");

}

//시간 차이 구하기

function dateDiff3() {

var input1="2019-01-22"; 

var input2="2019-01-22";

var date1 = new Date(input1+"T00:00:00"); 

var date2 = new Date(input2+"T00:00:00"); 

  var difference = endDate.getTime() - startDate.getTime();

  var diffTime = Math.floor(difference/1000);//초 간격

var hour = parseInt(diffTime/3600); 

        var min = parseInt((diffTime%3600)/60); 

  var sec = diffTime%60;

}

$("#dynaTree").dynatree("getTree").reload();