我有一个应用程序，我正在执行一些数据库操作。并且根据这些值我也正在执行一些计算。但是我正在对列表中的每个值进行多次迭代
for(int i=0;i<consultantMailList.size();i++){
String consultantRatio = " select count(distinct CANDYS.candidateId) from "
+" (Select C.candidateID,J.joborderID from db_candidatenote C, db_jobordernote J "
+" where C.noteid=J.noteid and C.action like 'Engaged' "
+" and C.dateadded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\" ) N,"
+" (Select distinct Note.candidateId, JNote.jobOrderID "
+" from db_candidatenote Note,db_jobordernote JNote, corporateuser User where "
+" Note.noteid=JNote.noteid "
+" and Note.commentingPersonID = User.userid "
+" and User.name= "+"\""+consultantNameList.get(i)+"\""
+" and Note.action='Sourcing') CANDYS "
+" where N.candidateID= CANDYS.candidateId "
+" and N.joborderid=CANDYS.jobOrderID "
+" union"
+" select count(distinct CANDYS.candidateId) from "
+" (Select C.candidateID,J.joborderID from db_candidatenote C, db_jobordernote J "
+" where C.noteid=J.noteid and C.action like 'Qualification' "
+" and C.dateadded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\" ) N,"
+" (Select distinct Note.candidateId, JNote.jobOrderID "
+" from db_candidatenote Note,db_jobordernote JNote, corporateuser User where "
+" Note.noteid=JNote.noteid "
+" and Note.commentingPersonID = User.userid "
+" and User.name= "+"\""+consultantNameList.get(i)+"\""
+" and Note.action='Sourcing') CANDYS "
+" where N.candidateID= CANDYS.candidateId "
+" and N.joborderid=CANDYS.jobOrderID "
+" union "
+" select count(distinct CANDYS.candidateId) from "
+" (Select C.candidateID,J.joborderID from db_candidatenote C, db_jobordernote J "
+" where C.noteid=J.noteid and C.action like 'Internal Submission' "
+" and C.dateadded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\" ) N,"
+" (Select distinct Note.candidateId, JNote.jobOrderID "
+" from db_candidatenote Note,db_jobordernote JNote, corporateuser User where "
+" Note.noteid=JNote.noteid "
+" and Note.commentingPersonID = User.userid "
+" and User.name= "+"\""+consultantNameList.get(i)+"\""
+" and Note.action='Sourcing') CANDYS "
+" where N.candidateID= CANDYS.candidateId "
+" and N.joborderid=CANDYS.jobOrderID "
+" union "
+" select count(distinct CANDYS.candidateId) from sendout S,"
+" (Select distinct Note.candidateId, JNote.jobOrderID "
+" from db_candidatenote Note,db_jobordernote JNote, corporateuser User where "
+" Note.noteid=JNote.noteid "
+" and Note.commentingPersonID = User.userid "
+" and User.name= "+"\""+consultantNameList.get(i)+"\""
+" and Note.action='Sourcing' ) CANDYS "
+" where S.candidateID= CANDYS.candidateId "
+" and S.joborderid=CANDYS.jobOrderID "
+" and S.dateadded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\" "
+" union"
+" select count(distinct CANDYS.candidateId) from "
+" (Select C.candidateID,J.joborderID from db_candidatenote C, db_jobordernote J "
+" where C.noteid=J.noteid and C.action like '%Interview%' "
+" and C.dateadded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\" ) N,"
+" (Select distinct Note.candidateId, JNote.jobOrderID "
+" from db_candidatenote Note,db_jobordernote JNote, corporateuser User where "
+" Note.noteid=JNote.noteid "
+" and Note.commentingPersonID = User.userid "
+" and User.name= "+"\""+consultantNameList.get(i)+"\""
+" and Note.action='Sourcing') CANDYS "
+" where N.candidateID= CANDYS.candidateId "
+" and N.joborderid=CANDYS.jobOrderID "
+" union "
+" select count(distinct CANDYS.candidateId ) from placement P,(Select distinct Note.candidateId, JNote.jobOrderID "
+" from db_candidatenote Note,db_jobordernote JNote, corporateuser User where "
+" Note.noteid=JNote.noteid "
+" and Note.commentingPersonID = User.userid "
+" and User.name= "+"\""+consultantNameList.get(i)+"\""
+" and Note.action='Sourcing') CANDYS "
+" where P.candidateID= CANDYS.candidateId "
+" and P.joborderid=CANDYS.jobOrderID "
+" and P.dateadded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\" " ;
String countAnalystPlacement ="SELECT COUNT(*) FROM placement where analyst like "+"\""+consultantNameList.get(i)+"\" and dateAdded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\"" ;
rsServeResource7 = st.executeQuery(countAnalystPlacement);
while(rsServeResource7.next()){
placementActual = rsServeResource7.getInt(1);
}
System.out.println("Placement Actual for :"+consultantNameList.get(i)+"--"+placementActual);
//System.out.println(consultantRatio);
rsServeResource2 = st.executeQuery(consultantRatio);
while (rsServeResource2.next()) {
// these variables will be divided by actual milestone numbers like source to engage / engage etc within that time range ..
if(rsServeResource2.getString(1)!=null){
sourceToEngage = Integer.parseInt(rsServeResource2.getString(1));
}else if(rsServeResource2.getString(2)!=null){
sourceToQualification = Integer.parseInt(rsServeResource2.getString(2));
}else if(rsServeResource2.getString(3)!=null){
sourceToIs = Integer.parseInt(rsServeResource2.getString(3));
}else if(rsServeResource2.getString(4)!=null){
sourceToPresent = Integer.parseInt(rsServeResource2.getString(4));
}else if(rsServeResource2.getString(5)!=null){
sourceToInterview = Integer.parseInt(rsServeResource2.getString(5));
}else if(rsServeResource2.getString(6)!=null){
sourceToPlacament = Integer.parseInt(rsServeResource2.getString(6));
}
System.out.println("Source to engage for :"+consultantNameList.get(i)+"-->"+sourceToEngage);
System.out.println("Source to qualification for :"+consultantNameList.get(i)+"-->"+sourceToQualification);
System.out.println("Source to IS for :"+consultantNameList.get(i)+"-->"+sourceToIs);
System.out.println("Source to Present for :"+consultantNameList.get(i)+"-->"+sourceToPresent);
System.out.println("Source to interview for :"+consultantNameList.get(i)+"-->"+sourceToInterview);
System.out.println("Source to placement for :"+consultantNameList.get(i)+"-->"+sourceToPlacament);
String sourcingSql = "select count(distinct candidateId) from db_candidatenote Note,corporateuser User where Note.commentingPersonID =User.userid and User.name like "+"\""+consultantNameList.get(i)+"\" and action IN ('Sourcing','Sourcing-Green') and Note.dateAdded between "+ "\""+ new java.sql.Timestamp(startDate.getTime())+ "\" and "+ "\""+ new java.sql.Timestamp(endDate.getTime())+ "\"" ;
rsServeResource6 = st.executeQuery(sourcingSql);
while(rsServeResource6.next()){
if(rsServeResource6.getString(1)!=null){
sourcingActual = Integer.parseInt(rsServeResource6.getString(1));
}
}
System.out.println("Actual number of Sourcing :"+sourcingActual);
/****************** value modification done here *********************************/
if(sourceToEngage!=0){
sourceToEngage = sourcingActual/sourceToEngage;
}if(sourceToQualification !=0){
sourceToQualification =sourcingActual/qualificationActual;
}if(isSubmissionActual !=0){
sourceToIs = sourcingActual / isSubmissionActual;
}if(presentActual !=0){
sourceToPresent = sourcingActual /presentActual;
}if(interviewedActual !=0){
sourceToInterview = sourcingActual/interviewedActual;
}if(placementActual !=0){
sourceToPlacament = sourcingActual/placementActual;
}
/*********************************** Ends Here ************************************/
System.out.println("sourceToEngageRatio" +sourceToEngage);
System.out.println("sourceToQualificationRatio" +sourceToQualification);
System.out.println("sourceToIsRatio" +sourceToIs);
System.out.println("sourceToPresentRatio" +sourceToPresent);
System.out.println("sourceToInterviewRatio" +sourceToInterview);
System.out.println("sourceToPlacementRatio" +sourceToPlacament);
}
if(rsServeResource2.getRow() % 2==0){
analystRatioTable = analystRatioTable + "<tr style=\"border-bottom: 2px solid #b6b6b4;\"><td style=\"color: #1391d7;\">"+consultantNameList.get(i)+"</td><td>"+sourceToEngage+":"+"1"+"</td><td>"+sourceToQualification+":"+"1"+"</td><td>"+"</td><td>"+sourceToIs+":"+"1"+"</td><td>"+sourceToPresent+":"+"1"+"</td><td>"+sourceToInterview+":"+"1"+"</td><td>"+sourceToPlacament+":"+"1"+"</td></tr>";
} else {
analystRatioTable = analystRatioTable + "<tr style=\"border-bottom: 2px solid #b6b6b4;\"><td style=\"color: #1391d7;\">"+consultantNameList.get(i)+"</td><td>"+sourceToEngage+":"+"1"+"</td><td>"+sourceToQualification+":"+"1"+"</td><td>"+"</td><td>"+sourceToIs+":"+"1"+"</td><td>"+sourceToPresent+":"+"1"+"</td><td>"+sourceToInterview+":"+"1"+"</td><td>"+sourceToPlacament+":"+"1"+"</td></tr>";
}
System.out.println("Table data created :"+analystRatioTable);
}
我多次获得每个值，为什么 .LIst 大小为 5
这是我的代码，我在该行中遇到了异常
但我不明白我错在哪里。请有人帮忙
最佳答案
您声称获得异常的代码确实出现在上面较大的代码中。
但是，我在其他地方看到了问题:
if(rsServeResource2.getRow() % 2==0)
在执行不同的查询并获得新结果集 - rsServeResource6 后，您可以访问 rsServeResource2 结果集 - 这意味着 rsServeResource2 是已关闭且无法访问。
编辑:
这不是唯一的问题。错误的缩进使得很难注意到 rsServeResource6 = st.executeQuery(commerceSql); 位于迭代前一个结果集的循环内。这会导致 rsServeResource2 关闭。如果必须同时迭代两个结果集，请使用不同的 Statement 对象来执行它们。
关于java - 为什么我得到列表中每个值的多次迭代，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30498991/