嘿玛尼·雷迪，

也许您可以使用以下代码，我有点懒于为所有代码构建代码，所以我将其保持了简单性

导入java.io.File
 导入groovy.xml.MarkupBuilder
 class readLineByLine {
 静态main（args）{

 def varStringWriter = new StringWriter（）;
 def varXMLBuilder =新的MarkupBuilder（varStringWriter）;

 字符串lineItems =" 20171118AAAB0009C707000001111 +1234567.11 OSuser-ABC Primary 00 +7654321.22" +'\ n'+
 '20161118AAAB0009C707000001111 +1234567.11）用户-ABC主00 +7654321.22'+'\ n'+
 " 20151118AAAB0009C707000001111 +1234567.11 OSuser-ABC Primary 00 +7654321.22"
 字符串newItem;
 lineItems.eachLine {

 line-> newItem = line;
 字符串newItem1 = newItem.substring（0,29）;
 字符串newItem2 = newItem.substring（30,37）;
 字符串newItem3 = newItem.substring（37,48）;

 varXMLBuilder.RECORD {
 node1（newItem1）;
 node2（newItem2）;
 node3（newItem3）;
 }
 }
 def xml = varStringWriter.toString（）;
 xml =" " + xml +" ";

 println xml;
 }
 } 

致谢

Akash