freemarker中的left_pad和right_pad

 

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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

1 <#--freemarker中的left_pad 距左边--> 2      [${""?left_pad(8)}] 3      [${"E"?left_pad(8)}] 4      [${"EF"?left_pad(8)}] 5      [${"EFG"?left_pad(8)}] 6      [${"EFGH"?left_pad(8)}] 7      [${"EFGHI"?left_pad(8)}] 8      [${"EFGHIJ"?left_pad(8)}] 9      [${"EFGHIJK"?left_pad(8)}]10      [${"EFGHIJKL"?left_pad(8)}]11      12      [${""?left_pad(8,"*")}]13      [${"E"?left_pad(8,"*")}]14      [${"EF"?left_pad(8,"*")}]15      [${"EFG"?left_pad(8,"*")}]16      [${"EFGH"?left_pad(8,"*")}]17      [${"EFGHI"?left_pad(8,"*")}]18      [${"EFGHIJ"?left_pad(8,"*")}]19      [${"EFGHIJK"?left_pad(8,"*")}]20      [${"EFGHIJKL"?left_pad(8,"*")}]21      22      [${""?left_pad(8,"?*?")}]23      [${"E"?left_pad(8,"?*?")}]24      [${"EF"?left_pad(8,"?*?")}]25      [${"EFG"?left_pad(8,"?*?")}]26      [${"EFGH"?left_pad(8,"?*?")}]27      [${"EFGHI"?left_pad(8,"?*?")}]28      [${"EFGHIJ"?left_pad(8,"?*?")}]29      [${"EFGHIJK"?left_pad(8,"?*?")}]30      [${"EFGHIJKL"?left_pad(8,"?*?")}]31      32      <#--freemarker中的right_pad 距右边-->33      [${""?right_pad(8)}]34      [${"E"?right_pad(8)}]35      [${"EF"?right_pad(8)}]36      [${"EFG"?right_pad(8)}]37      [${"EFGH"?right_pad(8)}]38      [${"EFGHI"?right_pad(8)}]39      [${"EFGHIJ"?right_pad(8)}]40      [${"EFGHIJK"?right_pad(8)}]41      [${"EFGHIJKL"?right_pad(8)}]42      43      [${""?right_pad(8,"*")}]44      [${"E"?right_pad(8,"*")}]45      [${"EF"?right_pad(8,"*")}]46      [${"EFG"?right_pad(8,"*")}]47      [${"EFGH"?right_pad(8,"*")}]48      [${"EFGHI"?right_pad(8,"*")}]49      [${"EFGHIJ"?right_pad(8,"*")}]50      [${"EFGHIJK"?right_pad(8,"*")}]51      [${"EFGHIJKL"?right_pad(8,"*")}]52      53      [${""?right_pad(8,"?*?")}]54      [${"E"?right_pad(8,"?*?")}]55      [${"EF"?right_pad(8,"?*?")}]56      [${"EFG"?right_pad(8,"?*?")}]57      [${"EFGH"?right_pad(8,"?*?")}]58      [${"EFGHI"?right_pad(8,"?*?")}]59      [${"EFGHIJ"?right_pad(8,"?*?")}]60      [${"EFGHIJK"?right_pad(8,"?*?")}]61      [${"EFGHIJKL"?right_pad(8,"?*?")}]

 

 3、示例结果

1      [        ] 2      [       E] 3      [      EF] 4      [     EFG] 5      [    EFGH] 6      [   EFGHI] 7      [  EFGHIJ] 8      [ EFGHIJK] 9      [EFGHIJKL]10      11      [********]12      [*******E]13      [******EF]14      [*****EFG]15      [****EFGH]16      [***EFGHI]17      [**EFGHIJ]18      [*EFGHIJK]19      [EFGHIJKL]20      21      [?*??*??*]22      [?*??*??E]23      [?*??*?EF]24      [?*??*EFG]25      [?*??EFGH]26      [?*?EFGHI]27      [?*EFGHIJ]28      [?EFGHIJK]29      [EFGHIJKL]30      31      [        ]32      [E       ]33      [EF      ]34      [EFG     ]35      [EFGH    ]36      [EFGHI   ]37      [EFGHIJ  ]38      [EFGHIJK ]39      [EFGHIJKL]40      41      [********]42      [E*******]43      [EF******]44      [EFG*****]45      [EFGH****]46      [EFGHI***]47      [EFGHIJ**]48      [EFGHIJK*]49      [EFGHIJKL]50      51      [?*??*??*]52      [E*??*??*]53      [EF??*??*]54      [EFG?*??*]55      [EFGH*??*]56      [EFGHI??*]57      [EFGHIJ?*]58      [EFGHIJK*]59      [EFGHIJKL]