我如何用Java编写IF-ELSE语句

时间：2016-10-03 06:04:11

标签： java excel eclipse if-statement talend

我们正试图将计算字段作为发货日期if-then-else语句写入带有eclipse的Java（Talend DI TOOL）

环境： 我们正试图在talend创造就业机会。

source systems (sql server and excel file)---->tmap---->Target system(Excel file)

输入表达式：if-then-else formula

发货日期 

if ([Customer])='0000001' or 
(TRIM([Corp Acct Name]))='GENERAL' or (TRIM([Corp Acct Name]))='ABC' or (TRIM([Corp Acct Name]))='XYZ'
or (TRIM([Corp Acct Name]))='CDE' then ([ShipDate]) 
elseif DATEPART('weekday',([MABD])) =1 and [Total Lead Time]<=5 then (([MABD])-[Total Lead Time]-2)
elseif DATEPART('weekday',([MABD])) =1 and [Total Lead Time]>5 then (([MABD])-[Total Lead Time]-4)
elseif DATEPART('weekday',([MABD])) =2 and [Total Lead Time]<=1 then (([MABD])-[Total Lead Time])
elseif DATEPART('weekday',([MABD])) =2 and [Total Lead Time]<=6 then (([MABD])-[Total Lead Time]-2)
elseif DATEPART('weekday',([MABD])) =2 and [Total Lead Time]>6 then (([MABD])-[Total Lead Time]-4)
elseif DATEPART('weekday',([MABD])) =3 and [Total Lead Time]<=2 then (([MABD])-[Total Lead Time])
elseif DATEPART('weekday',([MABD])) =3 and [Total Lead Time]<=7 then (([MABD])-[Total Lead Time]-2)
elseif DATEPART('weekday',([MABD])) =3 and [Total Lead Time]>7 then (([MABD])-[Total Lead Time]-4)
elseif DATEPART('weekday',([MABD])) =4 and [Total Lead Time]<=3 then (([MABD])-[Total Lead Time])
elseif DATEPART('weekday',([MABD])) =4 and [Total Lead Time]<=8 then (([MABD])-[Total Lead Time]-2)
elseif DATEPART('weekday',([MABD])) =4 and [Total Lead Time]>8 then (([MABD])-[Total Lead Time]-4)
elseif DATEPART('weekday',([MABD])) =5 and [Total Lead Time]<=4 then (([MABD])-[Total Lead Time])
elseif DATEPART('weekday',([MABD])) =5 and [Total Lead Time]<=9 then (([MABD])-[Total Lead Time]-2)
elseif DATEPART('weekday',([MABD])) =5 and [Total Lead Time]>9 then (([MABD])-[Total Lead Time]-4)
elseif DATEPART('weekday',([MABD])) =6 and [Total Lead Time]<=4 then (([MABD])-[Total Lead Time]-1)
elseif DATEPART('weekday',([MABD])) =6 and [Total Lead Time]<=9 then (([MABD])-[Total Lead Time]-3)
elseif DATEPART('weekday',([MABD])) =6 and [Total Lead Time]>9 then (([MABD])-[Total Lead Time]-5)
elseif DATEPART('weekday',([MABD])) =7 and [Total Lead Time]<=4 then (([MABD])-[Total Lead Time]-2)
elseif DATEPART('weekday',([MABD])) =7 and [Total Lead Time]<=9 then (([MABD])-[Total Lead Time]-4)
elseif DATEPART('weekday',([MABD])) =7 and [Total Lead Time]>9 then (([MABD])-[Total Lead Time]-6)
END

我们尝试过：Ternery运营商在talend 

row1.customer='0000001'|| trim(row1.CorpAcctName)='GENERAL'|| trim(row1.CorpAcctName)='ABC' or trim(row1.CorpAcctName)='XYZ or trim(row1.CorpAcctName)=='SCDE' ||?row1.ShipDate:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD)=1)-1) and row2.L+1<5?row1.MABD-row2.L+1-2:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=1)-1) and row2.L+1>5?row1.MABD-row2.L+1-4:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=2)-1) and row2.L+1<=1?row1.MABD-row2.L+1:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=2)-1) and row2.L+1<=6?row1.MABD-row2.L+1-2:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=2)-1) and row2.L+1>6?row1.MABD-row2.L+1-4:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=3)-1) and row2.L+1<=2?row1.MABD-row2.L+1:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=3)-1) and row2.L+1<=7?row1.MABD-row2.L+1-2:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=3)-1) and row2.L+1>7?row1.MABD-row2.L+1-4:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=4)-1) and row2.L+1<=3?row1.MABD-row2.L+1:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=4)-1) and row2.L+1<=8?row1.MABD-row2.L+1-2:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=4)-1) and row2.L+1>8?row1.MABD-row2.L+1-4:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=5)-1) and row2.L+1<=4?row1.MABD-row2.L+1:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=5)-1) and row2.L+1<=9?row1.MABD-row2.L+1-2:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=5)-1) and row2.L+1>9?row1.MABD-row2.L+1-4:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=6)-1) and row2.L+1<=4?row1.MABD-row2.L+1-1:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=6)-1) and row2.L+1<=9?row1.MABD-row2.L+1-3:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=6)-1) and row2.L+1>9?row1.MABD-row2.L+1-5:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=7)-1) and row2.L+1<=4?row1.MABD-row2.L+1-2:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=7)-1) and row2.L+1<=9?row1.MABD-row2.L+1-4:
Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=7)-1) and row2.L+1>9?row1.MABD-row2.L+1-6:""

对此有任何帮助将不胜感激？

1 个答案:

答案 0 :(得分：1)

首先，表达式中存在多个语法错误：如果要比较2个Int，则正确的运算符为＆＃34; ==＆＃34;。 （如果你想比较两个String，你应该使用"0000001".equals(row1.customer)）。

这个表达没有意义：

 Integer.toString (TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD=1)-1)

如果您想将DAY_OF_WEEK与1进行比较，请使用

(TalendDate.getPartOfDate("DAY_OF_WEEK",row1.MABD)-1) ==1

然后，在tMap中使用原始的Ternary运算符可能不是最好的事情：它不适合像这样的复杂表达式（没有可用的注释，没有可能的重用）。你应该在＆＃34; Routine＆＃34;中创建一个方法。 section，并将row1.customer，row1.CorpAcctName，row1.ShipDate，row1.MABD作为参数。 在这个例程方法中，您可以使用IF / ELSE运算符，这些运算符不能直接在tMap中使用。

  public static int myFunction(String customer,String CorpAcctName,Integer ShipDate,Integer MABD) {
//adding comment is possible here
            if ("0000001".equals(customer).......) {

然后在tMap中，你只需要在表达式构造函数中调用你的函数。

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