freemarker中的left_pad和right_pad

freemarker中的left_pad和right_pad

1、简易说明

（1）left_pad 距左边

（2）right_pad 距右边

（3）当仅仅只有一个参数时，插入的是空白；当有两个参数时，插入的是第二个参数符号；如果第二个参数的长度大于1的话，会周期性地插入该符号

2、举例说明

<#--freemarker中的left_pad 距左边-->     [${""?left_pad(8)}]     [${"E"?left_pad(8)}]     [${"EF"?left_pad(8)}]     [${"EFG"?left_pad(8)}]     [${"EFGH"?left_pad(8)}]     [${"EFGHI"?left_pad(8)}]     [${"EFGHIJ"?left_pad(8)}]     [${"EFGHIJK"?left_pad(8)}]     [${"EFGHIJKL"?left_pad(8)}]          [${""?left_pad(8,"*")}]     [${"E"?left_pad(8,"*")}]     [${"EF"?left_pad(8,"*")}]     [${"EFG"?left_pad(8,"*")}]     [${"EFGH"?left_pad(8,"*")}]     [${"EFGHI"?left_pad(8,"*")}]     [${"EFGHIJ"?left_pad(8,"*")}]     [${"EFGHIJK"?left_pad(8,"*")}]     [${"EFGHIJKL"?left_pad(8,"*")}]          [${""?left_pad(8,"?*?")}]     [${"E"?left_pad(8,"?*?")}]     [${"EF"?left_pad(8,"?*?")}]     [${"EFG"?left_pad(8,"?*?")}]     [${"EFGH"?left_pad(8,"?*?")}]     [${"EFGHI"?left_pad(8,"?*?")}]     [${"EFGHIJ"?left_pad(8,"?*?")}]     [${"EFGHIJK"?left_pad(8,"?*?")}]     [${"EFGHIJKL"?left_pad(8,"?*?")}]          <#--freemarker中的right_pad 距右边-->     [${""?right_pad(8)}]     [${"E"?right_pad(8)}]     [${"EF"?right_pad(8)}]     [${"EFG"?right_pad(8)}]     [${"EFGH"?right_pad(8)}]     [${"EFGHI"?right_pad(8)}]     [${"EFGHIJ"?right_pad(8)}]     [${"EFGHIJK"?right_pad(8)}]     [${"EFGHIJKL"?right_pad(8)}]          [${""?right_pad(8,"*")}]     [${"E"?right_pad(8,"*")}]     [${"EF"?right_pad(8,"*")}]     [${"EFG"?right_pad(8,"*")}]     [${"EFGH"?right_pad(8,"*")}]     [${"EFGHI"?right_pad(8,"*")}]     [${"EFGHIJ"?right_pad(8,"*")}]     [${"EFGHIJK"?right_pad(8,"*")}]     [${"EFGHIJKL"?right_pad(8,"*")}]          [${""?right_pad(8,"?*?")}]     [${"E"?right_pad(8,"?*?")}]     [${"EF"?right_pad(8,"?*?")}]     [${"EFG"?right_pad(8,"?*?")}]     [${"EFGH"?right_pad(8,"?*?")}]     [${"EFGHI"?right_pad(8,"?*?")}]     [${"EFGHIJ"?right_pad(8,"?*?")}]     [${"EFGHIJK"?right_pad(8,"?*?")}]     [${"EFGHIJKL"?right_pad(8,"?*?")}]

3、示例结果

     [        ]     [       E]     [      EF]     [     EFG]     [    EFGH]     [   EFGHI]     [  EFGHIJ]     [ EFGHIJK]     [EFGHIJKL]          [********]     [*******E]     [******EF]     [*****EFG]     [****EFGH]     [***EFGHI]     [**EFGHIJ]     [*EFGHIJK]     [EFGHIJKL]          [?*??*??*]     [?*??*??E]     [?*??*?EF]     [?*??*EFG]     [?*??EFGH]     [?*?EFGHI]     [?*EFGHIJ]     [?EFGHIJK]     [EFGHIJKL]          [        ]     [E       ]     [EF      ]     [EFG     ]     [EFGH    ]     [EFGHI   ]     [EFGHIJ  ]     [EFGHIJK ]     [EFGHIJKL]          [********]     [E*******]     [EF******]     [EFG*****]     [EFGH****]     [EFGHI***]     [EFGHIJ**]     [EFGHIJK*]     [EFGHIJKL]          [?*??*??*]     [E*??*??*]     [EF??*??*]     [EFG?*??*]     [EFGH*??*]     [EFGHI??*]     [EFGHIJ?*]     [EFGHIJK*]     [EFGHIJKL]