java以逗号截取字符串_使用java流获取逗号分隔的字符串

我使用

java Stream有以下代码.

我正在尝试获取函数来构建一个值的字符串：“a,b”在这种情况下.

但是,输出(在这种情况下,separateByComma)始终为“b”.

有人可以解决一些问题吗？

@Test

public void testJoin() {

List occList = new ArrayList<> ( );

MOccS mOccS = new MOccS ();

mOccS.setOccSCd ( "1" );

mOccS.setOccSNm ( "a" );

occList.add ( mOccS );

MOccS mOccS2 = new MOccS ();

mOccS2.setOccSCd ( "2" );

mOccS2.setOccSNm ( "b" );

occList.add ( mOccS2 );

List strings = new ArrayList<> ( );

strings.add ( "1" );

strings.add ( "2" );

String separatedByComma = "";

for(String word: strings) {

separatedByComma = occList.stream ()

.filter ( occ -> word.equalsIgnoreCase ( occ.getOccSCd () ) )

.map ( occ -> occ.getOccSNm () )

.collect ( Collectors.joining ( "," ) );

}

System.out.println (separatedByComma);

}

class MOccS{

String occSCd;

String occSNm;

...

getter/setter

...

}