JSP - 아이디 중복 체크

JSP - 아이디 중복 체크

java - jsp에서 아이디 중복체크에 대한 제가했던 예제 첨부해드립니다. 

JAVA - controller

@RequestMapping(value="/admin/idDuplChk.do")

public ModelAndView idDuplChk(@RequestParam Map<String, Object> commandMap,ModelAndView model,HttpServletRequest request, 

HttpServletResponse response) throws Exception{

try {

String duplChk = commandMap.get("duplChk").toString();

int result = 0;

result = TotalmngService.idDuplChk("manager.idDuplChk", commandMap);

if(result == 0){

model.addObject("result","available_id");

}else{

model.addObject("result","unavailable_id");

}

return model;

} catch (Exception e) {

model.addObject("Msg",DataException.getExceptionMsg(e));

e.printStackTrace();

return model;

}

}

JAVA - service

int idDuplChk(String sqlId,Map<String, Object> commandMap) throws Exception;

JAVA - serviceImpl

@Override

public int idDuplChk(String sqlId,Map<String, Object> commandMap ) throws Exception {

return TotalmngDAO.idDuplChk(sqlId,commandMap);

}

JAVA - DAO

public int idDuplChk(String sqlId,Map<String, Object> commandMap) {

return selectOne(sqlId, commandMap);

}

SQL

  <!-- ID 중복 체크 -->

<select id="idDuplChk" parameterType="hashmap" resultType="int">

SELECT

COUNT(*)AS CNT

FROM 

<if test="duplChk != null and duplChk != ''">

        table_admin

WHERE 1=1

AND a_id = #{a_id}

</if>

</select>

JSP - 자바스크립트

var idDupChk = "";

/* 아이디 중복확인 */

function fn_idDuplChk(data) {

if(data == 'admin'){

if($("#a_id").val() == '' || $("#a_id").val() == null){

    alert('중복체크할 아이디를 입력하세요');    

    return;    

    }

document.form.duplChk.value="admin";

}

var formData = new FormData(document.form);

$.ajax({

type: 'POST',

data: formData,

url: "<c:url value='/admin/idDuplChk.do'/>",

dataType :'json',

processData: false,

contentType: false,

success: function(data){

//alert(data.result);

if(data.result === 'available_id'){

alert("사용 가능한 아이디 입니다.");

idDupChk = "Y";

}

else if(data.result === 'unavailable_id'){

alert("이미 사용중인 아이디입니다.");

$("#a_id").val('');

idDupChk = "";

}

},

    error: function (xhr, ajaxOptions, thrownError) {}

});

}

JSP - HTML

<input type="hidden" id="duplChk" name="duplChk">

<button class="sr_id" type="button" onclick="fn_idDuplChk('admin')">중복확인</button>