StringUtils.join方法总结

import java.util.ArrayList;import java.util.List;import org.apache.commons.lang3.StringUtils;List<String> list=new ArrayList<String>();list.add("a");list.add("b");list.add("c");String listjoin=StringUtils.join(list);String listjoin2=StringUtils.join(list,",");System.out.println(listjoin);System.out.println(listjoin2);StringBuffer sb=new StringBuffer();sb.append("x,y,z,");String arrjoin=StringUtils.join(sb.toString().split(","));String arrjoin2=StringUtils.join(sb.toString().split(","),",");System.out.println(arrjoin);System.out.println(arrjoin2);

输出结果：

[a, b, c]a,b,cxyzx,y,z