freemarker中的substring取子串（十四）

freemarker中的substring取子串

1、substring取子串介绍

（1）表达式?substring(from,to)

（2）当to为空时，默认的是字符串的长度

（3）from是第一个字符的开始索引，to最后一个字符之后的位置索引

2、举例说明

      <#--freemarker中的substring取子串-->
 
      ${'EFGHIJKL'?substring(0)}
      ${'EFGHIJKL'?substring(1)}
      ${'EFGHIJKL'?substring(2)}
      ${'EFGHIJKL'?substring(3)}
      ${'EFGHIJKL'?substring(4)}
      ${'EFGHIJKL'?substring(5)}
      ${'EFGHIJKL'?substring(6)}
      ${'EFGHIJKL'?substring(7)}
      ${'EFGHIJKL'?substring(8)}
 
      ${'EFGHIJKL'?substring(0,1)}
      ${'EFGHIJKL'?substring(0,2)}
      ${'EFGHIJKL'?substring(0,3)}
      ${'EFGHIJKL'?substring(0,4)}
      ${'EFGHIJKL'?substring(0,5)}
      ${'EFGHIJKL'?substring(0,6)}
      ${'EFGHIJKL'?substring(0,7)}
      ${'EFGHIJKL'?substring(0,8)}

3、示例结果

      EFGHIJKL
      FGHIJKL
      GHIJKL
      HIJKL
      IJKL
      JKL
      KL
      L
 
      E
      EF
      EFG
      EFGH
      EFGHI
      EFGHIJ
      EFGHIJK
      EFGHIJKL