1.StringUtils.join使用方法:
String result=StringUtils.join(arr,'','');如果arr=["1","2","3","A","B","C"];
那么result="1,2,3,A,B,C";
這個(gè)用在in查詢的場(chǎng)合很好.
如果要顛倒過來,用String[] arr=result.split(",");就好了.
當(dāng)然,String.split也是一個(gè)非常實(shí)用的函數(shù).
2.MessageFormat.format使用方法:
String message = "Territory {0} has been transferred to Team {1}.";
Object[] params={"A1","B2"};
String transferMsg = MessageFormat.format(message,params);//Territory A1 has been transferred to Team B2.
這個(gè)函數(shù)用于預(yù)設(shè)空缺待填文本的場(chǎng)合很好.