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[工學(xué)]freemarker-資料下載頁

2024-10-16 18:21本頁面
  

【正文】 swer} ${answer?} ${answer?} ${answer?} 輸出: 42 42 42 $ 4,200% number ? 要指定數(shù)字格式,用如下方法: setting number_format=0.E0/ ${1234} ${12345?string(0.E0)} 輸出: date ? date ? time ? datetime sequences ? first:第一個(gè)元素 ? last:最后一個(gè)元素 ? seq_contains:判斷是否包含指定字符串。如: assign x = [red, 16, blue, cyan] blue: ${x?seq_contains(blue)?string(yes, no)} yellow: ${x?seq_contains(yellow)?string(yes, no)} 16: ${x?seq_contains(16)?string(yes, no)} 16: ${x?seq_contains(16)?string(yes, no)} 輸出: blue: yes yellow: no 16: yes 16: no sequences ? seq_index_of:返回指定值在 sequences中首次出現(xiàn)的位置 ,若無,則返回 1。如: assign colors = [“red”, “green”, “blue”] ${colors?seq_index_of(“blue”)} ${colors?seq_index_of(“red”)} ${colors?seq_index_of(“purple”)} 輸出: 2 0 1 也可用 ${names?seq_index_of(“Joe”, 2)} 這種形式,返回指定串第幾次出現(xiàn)的位置。 ? seq_last_index_of sequences ? reverse ? size ? sort。如: assign ls = [whale, Barbara, zeppelin, aardvark, beetroot]?sort list ls as i${i} /list ? sort_by。如: assign ls = [ {“name”:“whale”, “weight”:2021}, {“name”:“Barbara”, “weight”:53}, {“name”:“zeppelin”, “weight”:200}, {“name”:“aardvark”, “weight”:30}, {“name”:“beetroot”, “weight”:} ] Order by name: list ls?sort_by(“name”) as i ${}: ${} /list Order by weight: list ls?sort_by(“weight”) as i ${}: ${} /list sequences 其它 ? default:如果存在就用本生的值,不存在就用缺省值 。如: assign seq = [?a?, ?b?] ${seq[0]?default(??)}${seq[1]?default(??)}${seq[2]?default(??)}${seq[3]?defau lt(??)} 輸出: ab ? exists:變量存在返回 true,則否返回 false ? has_content :變量存在同時(shí)不為空時(shí)返回 true,則否返回 false
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