action中字符串的拆分

Question

在ACTION中如何使用split将拼装成的字符串拆开啊？
 var a = document.getElementById('trans_ru'+(i+1)).value + "+" + 
                            document.getElementById('beg_inventory'+(i+1)).value+ "+" +
                            document.getElementById('plan'+(i+1)).value ; 
                          
                            document.getElementById("selectedStrIds"+(i+1)).value=a;

Answer 1

org.apache.commons.lang 
Class StringUtils
java.lang.Object
  org.apache.commons.lang.StringUtils

Answer 2

a是一个string
String a = "abc+def";
a.split(...