{"id":4135,"date":"2024-09-02T11:58:11","date_gmt":"2024-09-02T03:58:11","guid":{"rendered":"https:\/\/qaqaq.top\/?p=4135"},"modified":"2024-09-02T13:38:37","modified_gmt":"2024-09-02T05:38:37","slug":"groovy-%e5%9f%ba%e6%9c%ac%e8%af%ad%e6%b3%95","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=4135","title":{"rendered":"Groovy \u57fa\u672c\u8bed\u6cd5"},"content":{"rendered":"\n
\"\"<\/div><\/figure>\n\n\n\n

\u7c7b\u578b\u8f6c\u6362:\u5f53\u9700\u8981\u65f6,\u7c7b\u578b\u4e4b\u95f4\u4f1a\u81ea\u52a8\u53d1\u751f\u7c7b\u578b\u8f6c\u6362: \u5b57\u7b26\u4e32\uff08String\uff09\u3001\u57fa\u672c\u7c7b\u578b(\u5982int) \u548c\u7c7b\u578b\u7684\u5305\u88c5\u7c7b (\u5982Integer)<\/p>\n\n\n\n

\u7c7b\u8bf4\u660e\uff1a\u5982\u679c\u5728\u4e00\u4e2agroovy \u6587\u4ef6\u4e2d\u6ca1\u6709\u4efb\u4f55\u7c7b\u5b9a\u4e49\uff0c\u5b83\u5c06\u88ab\u5f53\u505a script \u6765\u5904\u7406\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u8fd9\u4e2a\u6587\u4ef6\u5c06\u88ab\u900f\u660e\u7684\u8f6c\u6362\u4e3a\u4e00\u4e2a Script \u7c7b\u578b\u7684\u7c7b\uff0c\u8fd9\u4e2a\u81ea\u52a8\u8f6c\u6362\u5f97\u5230\u7684\u7c7b\u5c06\u4f7f\u7528\u539f\u59cb\u7684 groovy \u6587\u4ef6\u540d\u4f5c\u4e3a\u7c7b\u7684\u540d\u5b57\u3002groovy \u6587\u4ef6\u7684\u5185\u5bb9\u88ab\u6253\u5305\u8fdbrun \u65b9\u6cd5\uff0c\u53e6\u5916\u5728\u65b0\u4ea7\u751f\u7684\u7c7b\u4e2d\u88ab\u52a0\u5165\u4e00\u4e2amain \u65b9\u6cd5\u4ee5\u8fdb\u884c\u5916\u90e8\u6267\u884c\u8be5\u811a\u672c\u3002<\/p>\n\n\n\n

1\u3001\u6848\u4f8b 1:\u57fa\u672c\u6ce8\u610f\u70b9<\/h2>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

\u63d0\u793a:\u65b9\u6cd5\u8c03\u7528\u65f6,\u5728\u4e0d\u542b\u6709\u6b67\u4e49\u7684\u5730\u65b9\u53ef\u4ee5\u7701\u7565\u65b9\u6cd5\u8c03\u7528\u65f6\u7684\u62ec\u53f7\u3002\u8fd9\u7c7b\u4f3c\u4e8e\u4f7f\u7528${\u53d8\u91cf\u540d}\u65f6\uff0c\u62ec\u53f7\u5728\u4e0d\u5f15\u8d77\u6b67\u4e49\u7684\u5730\u65b9\u53ef\u4ee5\u7701\u7565\u662f\u4e00\u6837\u7684\uff1a\u5982<\/p>\n\n\n\n

def num1=1;\ndef num2= 2;\nprintln \"$num1 + $num2 = ${num1+num2}\"<\/code><\/pre>\n\n\n\n
\n\n\n\n
package top.qaqaq.demo\n\nclass Demo01BasicNotice {\n\n\/**---------------------------------------------------------------\n  1.groovy\u4e2d\u4f7f\u7528def \u5b9a\u4e49\u5c5e\u6027\u3001\u65b9\u6cd5,def\u652f\u6301\u52a8\u6001\u7c7b\u578b\u58f0\u660e\n  2.\u5355\u884c\u6ce8\u91ca\uff1a\/\/ \u591a\u884c\u6ce8\u91ca: \/**\n  3.gradle\u8bed\u53e5\u6700\u540e\u7684;(\u5206\u53f7)\u662f\u53ef\u4ee5\u7701\u7565\u7684\n  4.groovy\u53ef\u4ee5\u4e3a\u5c5e\u6027\u81ea\u52a8\u751f\u6210getter\u3001setter\u65b9\u6cd5\n  5.\u65b9\u6cd5\u58f0\u660e\u65f6\uff1a \u53c2\u6570\u7c7b\u578b\u3001\u8fd4\u56de\u503c\u7c7b\u578b\u3001return\u5173\u952e\u5b57\u53ef\u4ee5\u7701\u7565,\u65b9\u6cd5\u8c03\u7528\u65f6,\u5728\u4e0d\u5f15\u8d77\u6b67\u4e49\u7684\u5730\u65b9\uff0c\u53ef\u4ee5\u7701\u7565()\n  6.\u53d8\u91cf\u5f15\u7528\u65f6\uff1a \u5728\u4e0d\u5f15\u8d77\u6b67\u4e49\u7684\u524d\u63d0\u4e0b{}\u4e5f\u53ef\u4ee5\u7701\u7565,\u5728\u5bb9\u6613\u5f15\u8d77\u6b67\u4e49\u7684\u5730\u65b9\u5c31\u4e0d\u80fd\u7701\u7565{}\n  7.\u5bf9\u8c61\u5c5e\u6027\u8d4b\u503c\uff1a\n       \u65b9\u5f0f1: \u5bf9\u8c61.\u5c5e\u6027\u540d=\n       \u65b9\u5f0f2: \u5bf9\u8c61[\"\u5c5e\u6027\u540d\"]=\n       \u65b9\u5f0f3: \u5bf9\u8c61.\u5c5e\u6027setter\u65b9\u6cd5()\n       \u65b9\u5f0f4: \u5177\u540d\u6784\u9020\u5668\u7684\u65b9\u5f0f\n    \u8bfb\u53d6\u5c5e\u6027\u503c\uff1a\n       \u65b9\u5f0f1: \u5bf9\u8c61.\u5c5e\u6027\u540d\n       \u65b9\u5f0f2: \u5bf9\u8c61[\"\u5c5e\u6027\u540d\"]\n       \u65b9\u5f0f3: \u5bf9\u8c61.\u5c5e\u6027getter\u65b9\u6cd5()\n *\/\n\n    def  description=\"\u63cf\u8ff0\u4fe1\u606f\"\n\n    def bookname=\"\u6597\u7834\u82cd\u7a79\"\n\n    def sale(price){\n       \"the book is  $price\"\n\/\/        \"the book is  ${price}\"\n    }\n\n    def sum(price1,price2){\n       \"$price1 + $price2 = ${price1+price2}\"\n    }\n\n}<\/code><\/pre>\n\n\n\n
package top.qaqaq.demo\n\n\/\/def obj = new Demo01BasicNotice()\n\/\/println(obj.getBookname())\n\n\/\/def obj = new Demo01BasicNotice()\n\/\/def result = obj.sale 100\n\/\/println(result)\n\n\/\/def obj = new Demo01BasicNotice()\n\/\/obj.bookname = \"\u6597\u7f57\u5927\u9646\"\n\/\/println(obj.bookname)\n\n\/\/def obj = new Demo01BasicNotice()\n\/\/obj[\"bookname\"] = \"\u6597\u7f57\u5927\u9646\"\n\/\/println(obj.bookname)\n\n\/\/def obj = new Demo01BasicNotice()\n\/\/obj.setBookname(\"\u6597\u7f57\u5927\u9646\")\n\/\/println(obj.bookname)\n\n\/\/def obj = new Demo01BasicNotice(bookname: \"\u6597\u7f57\u5927\u9646\")\n\/\/println(obj.getBookname())\n\ndef obj = new Demo01BasicNotice(bookname: \"\u6597\u7f57\u5927\u9646\",description: \"\u6211\u7231\u5b66\u4e60\")\n\/\/println(obj.bookname)\n\/\/println(obj[\"bookname\"])\nprintln(obj.getBookname())<\/code><\/pre>\n\n\n\n
2\u3001\u6848\u4f8b 2:\u5f15\u53f7\u8bf4\u660e<\/h2>\n\n\n\n
def num1=1; \ndef num2=2; \ndef str1=\"1d\"; \/\/\u53cc\u5f15\u53f7\ndef str2='dsd'; \/\/\u5355\u5f15\u53f7\n\/\/\u53cc\u5f15\u53f7\u8fd0\u7b97\u80fd\u529b,\u5355\u5f15\u53f7\u7528\u4e8e\u5e38\u91cf\u5b57\u7b26\u4e32,\u4e09\u5f15\u53f7\u76f8\u5f53\u4e8e\u6a21\u677f\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u652f\u6301\u6362\u884c\nprintln \"$num1 + $num2 = ${num1 + num2}\" \n\/\/\u57fa\u672c\u6570\u636e\u7c7b\u578b\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u5bf9\u8c61\u4f7f\u7528,\u53ef\u4ee5\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\nprintln(num1.getClass().toString())\nprintln(str1.getClass().toString())\nprintln(str2.getClass().toString())<\/code><\/pre>\n\n\n\n
\n\n\n\n
package top.qaqaq.demo\n\n\/\/--------------------------------\u5b57\u7b26\u4e32----------------------------------------\ndef desc=\"\u6d4b\u8bd5\";\n\ndef str1='\u5355\u5f15\u53f7,\u4e0d\u652f\u6301\u53d8\u91cf\u5f15\u7528\uff0c\u4e0d\u652f\u6301\u6362\u884c\u64cd\u4f5c ${desc}';\nprintln(str1)\n\ndef str2=\"\u53cc\u5f15\u53f7,\u652f\u6301\u53d8\u91cf\u5f15\u7528\uff0c\u4e0d\u652f\u6301\u6362\u884c\u64cd\u4f5c ${desc}\";\nprintln(str2)\n\ndef str3='''\u6a21\u677f\u5b57\u7b26\u4e32,\u4e0d\u652f\u6301\u53d8\u91cf\u5f15\u7528\uff0c\u652f\u6301\u6362\n                  \u884c\u64cd\u4f5c ${desc}''';\nprintln(str3)\n\n\/\/\u57fa\u672c\u6570\u636e\u7c7b\u578b\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u5bf9\u8c61\u4f7f\u7528,\u53ef\u4ee5\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\nprintln(str1.getClass().toString())\nprintln(str2.getClass().toString())\nprintln(str3.getClass().toString())<\/code><\/pre>\n\n\n\n
3\u3001\u6848\u4f8b 3:\u4e09\u4e2a\u8bed\u53e5\u7ed3\u6784<\/h2>\n\n\n\n
Groovy \u652f\u6301\u987a\u5e8f\u7ed3\u6784\u4ece\u4e0a\u5411\u4e0b\u4f9d\u6b21\u89e3\u6790\u3001\u5206\u652f\u7ed3\u6784(if..else\u3001if..else if ..else..\u3001switch..case\u3001for\u3001while\u3001do..while)<\/p>\n\n\n\n
\u5177\u4f53\u53c2\u8003\u5b98\u7f51\uff1ahttp:\/\/www.groovy-lang.org\/semantics.html#_conditional_structures<\/a><\/p>\n\n\n\n
4\u3001\u6848\u4f8b 4:\u7c7b\u578b\u53ca\u6743\u9650\u4fee\u9970\u7b26<\/h2>\n\n\n\n
Groovy \u4e2d\u7684\u7c7b\u578b\u6709: <\/strong><\/p>\n\n\n\n
1.\u539f\u751f\u6570\u636e\u7c7b\u578b\u53ca\u5305\u88c5<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
2.\u7c7b\u3001\u5185\u90e8\u7c7b\u3001\u62bd\u8c61\u7c7b\u3001\u63a5\u53e3<\/p>\n\n\n\n
3.\u6ce8\u89e3<\/p>\n\n\n\n
4.Trait: \u53ef\u4ee5\u770b\u6210\u662f\u5e26\u6709\u65b9\u6cd5\u5b9e\u73b0\u7684\u63a5\u53e3
\u6743\u9650\u4fee\u9970\u7b26: public\u3001protected\u3001private<\/p>\n\n\n\n
\u62d3\u5c55\uff1aGroovy \u7c7b\u4e0e Java\u7c7b\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\u662f:<\/p>\n\n\n\n
1.\u6ca1\u6709\u53ef\u89c1\u6027\u4fee\u9970\u7b26\u7684\u7c7b\u6216\u65b9\u6cd5\u81ea\u52a8\u662f\u516c\u5171\u7684(\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u7279\u6b8a\u7684\u6ce8\u91ca\u6765\u5b9e\u73b0\u5305\u7684\u79c1\u6709\u53ef\u89c1\u6027)\u3002\n2.\u6ca1\u6709\u53ef\u89c1\u6027\u4fee\u9970\u7b26\u7684\u5b57\u6bb5\u5c06\u81ea\u52a8\u8f6c\u6362\u4e3a\u5c5e\u6027\uff0c\u4e0d\u9700\u8981\u663e\u5f0f\u7684 getter \u548c setter \u65b9\u6cd5\u3002\n3.\u5982\u679c\u5c5e\u6027\u58f0\u660e\u4e3a final\uff0c\u5219\u4e0d\u4f1a\u751f\u6210 setter\u3002\n4.\u4e00\u4e2a\u6e90\u6587\u4ef6\u53ef\u80fd\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u7c7b(\u4f46\u662f\u5982\u679c\u4e00\u4e2a\u6587\u4ef6\u4e0d\u5305\u542b\u7c7b\u5b9a\u4e49\u7684\u4ee3\u7801\uff0c\u5219\u5c06\u5176\u89c6\u4e3a\u811a\u672c)\u3002\u811a\u672c\u53ea\u662f\u5177\u6709\u4e00\u4e9b\u7279\u6b8a\u7ea6\u5b9a\u7684\u7c7b,\u5b83\u4eec\u7684\u540d\u79f0\u4e0e\u6e90\u6587\u4ef6\u76f8\u540c(\u6240\u4ee5\u4e0d\u8981\u5728\u811a\u672c\u4e2d\u5305\u542b\u4e0e\u811a\u672c\u6e90\u6587\u4ef6\u540d\u76f8\u540c\u7684\u7c7b\u5b9a\u4e49)\u3002<\/code><\/pre>\n\n\n\n
\u63d0 \u793a : \u6709 \u5173 Groovy \u4e2d \u5404 \u79cd \u5404 \u6837 \u7684 \u6570 \u636e \u7c7b \u578b \u548c \u6743 \u9650 \u4fee \u9970 \u7b26 \u53ca Goovy \u4e0e Java \u533a \u522b \u8bf7 \u53c2 \u8003\uff1a<\/p>\n\n\n\n
http:\/\/www.groovy-lang.org\/objectorientation.html#_modifiers_on_a_property<\/a><\/p>\n\n\n\n
5\u3001\u6848\u4f8b 5:\u96c6\u5408\u64cd\u4f5c<\/h2>\n\n\n\n
Groovy \u652f\u6301 List\u3001Map \u96c6\u5408\u64cd\u4f5c\uff0c\u5e76\u4e14\u62d3\u5c55\u4e86 Java \u4e2d\u7684 API,\u5177\u4f53\u53c2\u8003\u5982\u4e0b\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
List: 
add():\u6dfb\u52a0\u67d0\u4e2a\u5143\u7d20
plus():\u6dfb\u52a0\u67d0\u4e2a list \u96c6\u5408
remove():\u5220\u9664\u6307\u5b9a\u4e0b\u6807\u7684\u5143\u7d20
removeElement():\u5220\u9664\u67d0\u4e2a\u6307\u5b9a\u7684\u5143\u7d20
removeAll(): \u79fb\u9664\u67d0\u4e2a\u96c6\u5408\u4e2d\u7684\u5143\u7d20
pop():\u5f39\u51fa list \u96c6\u5408\u4e2d\u6700\u540e\u4e00\u4e2a\u5143\u7d20
putAt():\u4fee\u6539\u6307\u5b9a\u4e0b\u6807\u7684\u5143\u7d20
each():\u904d\u5386
size(): \u83b7\u53d6 list \u5217\u8868\u4e2d\u5143\u7d20\u7684\u4e2a\u6570
contains(): \u5224\u65ad\u5217\u8868\u4e2d\u662f\u5426\u5305\u542b\u6307\u5b9a\u7684\u503c\uff0c\u5219\u8fd4\u56de true <\/p>\n\n\n\n
Map: 
put():\u5411 map \u4e2d\u6dfb\u52a0\u5143\u7d20
remove():\u6839\u636e\u67d0\u4e2a\u952e\u505a\u79fb\u9664\uff0c\u6216\u8005\u79fb\u9664\u67d0\u4e2a\u952e\u503c\u5bf9
+\u3001-\uff1a\u652f\u6301 map \u96c6\u5408\u7684\u52a0\u51cf\u64cd\u4f5c
each():\u904d\u5386 map \u96c6\u5408<\/p>\n\n\n\n
\u8bf7\u53c2\u8003\u5b98\u7f51:http:\/\/www.groovy-lang.org\/syntax.html#_number_type_suffixes <\/a><\/p>\n\n\n\n
\u63d0\u793a:\u53ef\u4ee5\u628a\u4e0d\u540c\u7684\u57fa\u672c\u7c7b\u578b\u6dfb\u52a0\u5230\u540c\u4e00\u96c6\u5408\u4e2d\u3002<\/p>\n\n\n\n
\n\n\n\n
package top.qaqaq.demo\n\n\/\/--------------------------------------list\u589e\u5220\u6539\u67e5\u64cd\u4f5c-----------------------\n\n\/\/--------------------------------\u589e------------------------\n\n\/\/1.\u589e:\u5728\u96c6\u5408\u4e2d\u6dfb\u52a0\u5143\u7d20\ndef list = [5, 6, 7, 8]\nassert list instanceof java.util.List\nlist.add(12)\nprintln list.size()\n\n\/\/2.\u589e:\u96c6\u5408\u4e0e\u96c6\u5408\u76f8\u52a0\ndef list2 = [1,2,3,4]\nprintln list.plus(list2) \/\/\u5c06list2\u6dfb\u52a0\u5728list\u4e4b\u540e\n\n\/\/--------------------------------\u5220------------------------\n\n\/\/2.\u5220:\u5220\u9664\u4e0b\u6807\u4e3a2\u7684\u5143\u7d20\nlist.remove(2)\nprintln(list)\n\n\/\/2.\u5220:\u5220\u9664\u96c6\u5408\u4e2d\u6307\u5b9a\u7684\u5143\u7d20\nlist.removeElement(12)\nprintln(list)\n\n\/\/2.\u5220:\u4ecelist\u96c6\u5408\u4e2d\u79fb\u9664list3\u96c6\u5408\u4e2d\u7684\u5143\u7d20\ndef list3 = [6,8]\nlist.removeAll(list3)\nprintln(list)\n\n\/\/2.\u5220\uff1a\u4ecelist\u8868\u4e2d\u5f39\u51fa\u6700\u540e\u4e00\u4e2a\u5143\u7d20\nprintln list.pop()\nprintln(list)\n\n\/\/--------------------------------\u6539------------------------\n\nlist.putAt(2, 10) \/\/\u7b49\u6548\u4e8e list[2] = 10\nprintln(list)\n\n\/\/--------------------------------\u904d\u5386------------------------\n\n[1, 2, 3].each({\n    println \"Item: $it\"\/\/it\u662f\u5bf9\u5e94\u4e8e\u5f53\u524d\u5143\u7d20\u7684\u9690\u5f0f\u53c2\u6570\n})\n\/\/size():\u83b7\u53d6\u6b64\u5217\u8868\u4e2d\u7684\u5143\u7d20\u6570\u3002\n\/\/contains(): \u5982\u679c\u6b64\u5217\u8868\u5305\u542b\u6307\u5b9a\u7684\u503c\uff0c\u5219\u8fd4\u56de true\u3002\n\n\/\/--------------------------------------map\u7684\u589e\u5220\u6539\u67e5\u64cd\u4f5c--------------------------------\n\n\/\/ \u952e Key \u53ef\u4ee5\u4e0d\u4f7f\u7528\u5f15\u53f7 , \u53ef\u4ee5\u4f7f\u7528\u5355\u5f15\u53f7 '' , \u4e5f\u53ef\u4ee5\u4f7f\u7528\u53cc\u5f15\u53f7 \"\"\ndef map = [J:\"Java\", \"K\":\"Kotlin\", 'G':\"Groovy\"]\n\n\/\/------------------------------------map\u7684\u589e--------------------------\n\nmap.put(\"P\",\"Python\")\n\/\/map.putAll():\u589e\u52a0\u4e00\u4e2amap\nprintln(map)\n\n\/\/------------------------------------map\u7684\u5220--------------------------\n\nmap.remove(\"P\")   \/\/\u6839\u636e\u67d0\u4e2a\u952e\u505a\u79fb\u9664\nmap.remove(\"J\",\"Java\")\/\/\u79fb\u9664\u67d0\u4e2a\u952e\u503c\u5bf9\nprintln \"\u5220:\"+map\n\n\/\/------------------------------------map\u7684\u6539--------------------------\n\n\/\/ \"-\" \"+\" \u64cd\u4f5c\u7b26\u91cd\u8f7d\nmap2 = map - [K:\"Kotlin\"]\nprintln map2\n\nmap3 = map + [G:\"Gradle\"] \/\/\u952e\u76f8\u540c\u4f1a\u4ea7\u751f\u8986\u76d6\nprintln map3\n\n\/\/------------------------------------map\u7684\u67e5--------------------------\n\nmap.each { key, value ->\n    println \"key:$key  value:$value\"\n}\n\nmap.each { entry ->\n    println \"key: $entry.key value: $entry.value\"\n}<\/code><\/pre>\n\n\n\n
6\u3001\u6848\u4f8b 6:\u7c7b\u5bfc\u5165<\/h2>\n\n\n\n
Groovy \u9075\u5faa Java \u5141\u8bb8 import \u8bed\u53e5\u89e3\u6790\u7c7b\u5f15\u7528\u7684\u6982\u5ff5\u3002<\/p>\n\n\n\n
import groovy.xml.MarkupBuilder \ndef xml = new MarkupBuilder() \nassert xml != null<\/code><\/pre>\n\n\n\n
Groovy \u8bed\u8a00\u9ed8\u8ba4\u63d0\u4f9b\u7684\u5bfc\u5165<\/p>\n\n\n\n
import java.lang.*\nimport java.util.*\nimport java.io.*\nimport java.net.*\nimport groovy.lang.*\nimport groovy.util.*\nimport java.math.BigInteger\nimport java.math.BigDecimal<\/code><\/pre>\n\n\n\n
\u8fd9\u6837\u505a\u662f\u56e0\u4e3a\u8fd9\u4e9b\u5305\u4e2d\u7684\u7c7b\u6700\u5e38\u7528\u3002\u901a\u8fc7\u5bfc\u5165\u8fd9\u4e9b\u6837\u677f\u4ee3\u7801\u51cf\u5c11\u4e86\u3002<\/p>\n\n\n\n
\u53c2\u8003\u5b98\u7f51\u5730\u5740\uff1ahttp:\/\/www.groovy-lang.org\/structure.html#_imports<\/a><\/p>\n\n\n\n
\n\n\n\n
package top.qaqaq.demo\n\nimport groovy.xml.MarkupBuilder\nimport java.text.SimpleDateFormat\n\ndef xml = new MarkupBuilder()\nassert xml != null\n\ndef sdf =new SimpleDateFormat(\"yyyy-MM-dd\");\nprintln(sdf.format(new Date()))<\/code><\/pre>\n\n\n\n
7\u3001\u6848\u4f8b 7:\u5f02\u5e38\u5904\u7406<\/h2>\n\n\n\n
Groovy \u4e2d\u7684\u5f02\u5e38\u5904\u7406\u548c java \u4e2d\u7684\u5f02\u5e38\u5904\u7406\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n
def z\ntry {\n    def i = 7, j = 0\n    try {\n        def k = i \/ j \n        assert false \n    } finally {\n        z = 'reached here' \n    }\n} catch ( e ) {\n    assert e in ArithmeticException\n    assert z == 'reached here' \n}<\/code><\/pre>\n\n\n\n
\u53c2\u8003\u5b98\u7f51\u5730\u5740\uff1a http:\/\/www.groovy-lang.org\/semantics.html#_try_catch_finally<\/a><\/p>\n\n\n\n
8\u3001\u6848\u4f8b 8:\u95ed\u5305<\/h2>\n\n\n\n
\u95ed\u5305\uff1aGroovy \u4e2d\u7684\u95ed\u5305\u662f\u4e00\u4e2a\u5f00\u653e\u7684\u3001\u533f\u540d\u7684\u4ee3\u7801\u5757\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u53c2\u6570\u3001\u4e5f\u53ef\u4ee5\u6709\u8fd4\u56de\u503c\u3002\u95ed\u5305\u53ef\u4ee5\u5f15\u7528\u5176\u5468\u56f4\u4f5c\u7528\u57df\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\u3002<\/p>\n\n\n\n
\u8bed\u6cd5\uff1a{ [closureParameters -> ] statements }<\/code><\/p>\n\n\n\n
\u5176\u4e2d[ closureParameters-> ]<\/code>\u662f\u4e00\u4e2a\u53ef\u9009\u7684\u9017\u53f7\u5206\u9694\u7684\u53c2\u6570\u5217\u8868,\u53c2\u6570\u540e\u9762\u662f Groovy \u8bed\u53e5\u3002\u53c2\u6570\u7c7b\u4f3c\u4e8e\u65b9\u6cd5\u53c2\u6570\u5217\u8868\uff0c \u8fd9\u4e9b\u53c2\u6570\u53ef\u4ee5\u662f\u7c7b\u578b\u5316\u7684,\u4e5f\u53ef\u4ee5\u662f\u975e\u7c7b\u578b\u5316\u7684\u3002\u5f53\u6307\u5b9a\u53c2\u6570\u5217\u8868\u65f6\uff0c\u9700\u8981\u4f7f\u7528-><\/code> \u5b57\u7b26\uff0c\u7528\u4e8e\u5c06\u53c2\u6570\u4e0e\u95ed\u5305\u4f53\u5206\u79bb\u3002<\/p>\n\n\n\n
\u53c2\u8003\uff1ahttp:\/\/www.groovy-lang.org\/closures.html<\/a><\/p>\n\n\n\n
\/\/\u95ed\u5305\u4f53\u5b8c\u6210\u53d8\u91cf\u81ea\u589e\u64cd\u4f5c\n{ item++ }\n\/\/\u95ed\u5305\u4f7f\u7528 \u7a7a\u53c2\u6570\u5217\u8868 \u660e\u786e\u89c4\u5b9a\u8fd9\u662f\u65e0\u53c2\u7684\n{ -> item++ }\n\/\/\u95ed\u5305\u4e2d\u6709\u4e00\u4e2a\u9ed8\u8ba4\u7684\u53c2\u6570[it]\uff0c\u5199\u4e0d\u5199\u65e0\u6240\u8c13\n{ println it }\n{ it -> println it }\n\/\/\u5982\u679c\u4e0d\u60f3\u4f7f\u7528\u9ed8\u8ba4\u7684\u95ed\u5305\u53c2\u6570it,\u90a3\u9700\u8981\u663e\u793a\u81ea\u5b9a\u4e49\u53c2\u6570\u7684\u540d\u79f0\n{ name -> println name }\n\/\/\u95ed\u5305\u4e5f\u53ef\u4ee5\u63a5\u53d7\u591a\u4e2a\u53c2\u6570\n{ String x, int y ->\n    println \"hey ${x} the value is ${y}\"\n}\n\/\/\u95ed\u5305\u53c2\u6570\u4e5f\u53ef\u662f\u4e00\u4e2a\u5bf9\u8c61\n{ reader ->\n    def line = reader.readLine() \n    line.trim()\n}<\/code><\/pre>\n\n\n\n
\u95ed\u5305\u8c03\u7528\u65b9\u5f0f\uff1a \u95ed\u5305\u662f groovy.lang.Closure<\/code> \u7684\u5b9e\u4f8b\u3002\u5b83\u53ef\u4ee5\u50cf\u4efb\u4f55\u5176\u4ed6\u53d8\u91cf\u4e00\u6837\u5206\u914d\u7ed9\u4e00\u4e2a\u53d8\u91cf\u6216\u5b57\u6bb5\u3002<\/p>\n\n\n\n
\u95ed\u5305\u5bf9\u8c61(\u53c2\u6570)
\u95ed\u5305\u5bf9\u8c61.call(\u53c2\u6570)<\/p>\n\n\n\n
def isOdd = { int i -> i%2 != 0 } \nassert isOdd(3) == true\nassert isOdd.call(2) == false\n\ndef isEven = { it%2 == 0 } \nassert isEven(3) == false \nassert isEven.call(2) == true<\/code><\/pre>\n\n\n\n
\u7279\u6b8a\u8bf4\u660e\uff1a \u53ef\u4ee5\u628a\u95ed\u5305\u5f53\u4f5c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u65b9\u6cd5\u4f7f\u7528<\/p>\n\n\n\n
\/\/\u65e0\u53c2\u95ed\u5305\ndef run(Closure closure){ \n    println(\"run start...\")\n    closure() println(\"run end...\")\n}\n\nrun {\n    println \"running......\"\n}\n\n\/\/\u6709\u53c2\u95ed\u5305\ndef caculate(Closure closure){\n    def num1=1;\n    def num2=3; \n    println(\"caculate start...\")\n    closure(num1,num2) \n    println(\"caculate end...\")\n}\ncaculate {x,y -> println \"\u8ba1\u7b97\u7ed3\u679c\u4e3a\uff1a$x+$y=${x+y}\"} \/\/\u5728build.gradle\u6587\u4ef6\u4e2d\u6211\u4eec\u89c1\u5230\u7684\u5f88\u591a\u90fd\u662f\u95ed\u5305\u683c\u5f0f\u7684\u3002<\/code><\/pre>\n\n\n\n
\n\n\n\n
package top.qaqaq.demo\n\n\/*====================================================\n      \u95ed\u5305\uff1a\n        \u5b9a\u4e49\uff1a\u662f\u4e00\u4e2a\u5f00\u653e\u7684\u3001\u533f\u540d\u7684\u4ee3\u7801\u5757\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u53c2\u6570\u3001\u4e5f\u53ef\u4ee5\u6709\u8fd4\u56de\u503c\u3002\u95ed\u5305\u53ef\u4ee5\u5f15\u7528\u5176\u5468\u56f4\u4f5c\u7528\u57df\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\u3002\n        \u8bed\u6cd5\uff1a{ [closureParameters -> ] statements }\n        \u8c03\u7528\uff1a\n            \u7b2c\u4e00\u6b65\uff1a\u5c06\u95ed\u5305\u8d4b\u503c\u7ed9\u4e00\u4e2a\u53d8\u91cf\n            \u7b2c\u4e8c\u6b65: \u53d8\u91cf\u540d()\u3001\u53d8\u91cf\u540d.call()\n\n        \u95ed\u5305\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u4f7f\u7528\uff1a\u4f5c\u4e3a\u65b9\u6cd5\u7684\u53c2\u6570\u4f7f\u7528\n======================================================*\/\n\n\/\/def running = {\n\/\/    println(\"running start...\")\n\/\/\n\/\/    println(\"running end...\")\n\/\/}\n\/\/\n\/\/running()\n\/\/running.call()\n\n\/\/def running = { who ->\n\/\/    println(\"$who running start...\")\n\/\/\n\/\/    println(\"$who running end...\")\n\/\/}\n\/\/\n\/\/running(\"\u8d39\u7389\u6e05\")\n\/\/running.call(\"\u5f20\u83f2\")\n\ndef running(Closure closure) {\n    println(\"running start...\")\n    closure()\n    println(\"running end...\")\n}\n\nrunning({println(\"running........\")})\n\n\/\/def caculate(Closure closure) {\n\/\/     def num1=10\n\/\/     def num2=15\n\/\/     closure(num1,num2)\n\/\/}\n\/\/\n\/\/caculate({k,v->println(\"$k + $v = ${k+v}\")})\n\n\/\/def caculate(num1, num2, Closure closure) {\n\/\/    closure(num1,num2)\n\/\/}\n\/\/\n\/\/caculate(10, 15, {k,v->println(\"$k + $v = ${k+v}\")})\n\/\/\/\/\u95ed\u5305\u4f5c\u4e3a\u65b9\u6cd5\u7684\u6700\u540e\u4e00\u4e2a\u53c2\u6570\uff0c\u90a3\u4e48\u95ed\u5305\u53ef\u4ee5\u5199\u5728\u65b9\u6cd5\u5916\u8fb9\n\/\/caculate(10, 15){k,v->println(\"$k + $v = ${k+v}\")}\n\ndef caculate(Closure closure) {\n    def num1=10\n    def num2=15\n    closure(num1,num2)\n}\n\n\/\/\u95ed\u5305\u4f5c\u4e3a\u65b9\u6cd5\u7684\u6700\u540e\u4e00\u4e2a\u53c2\u6570\uff0c\u90a3\u4e48\u95ed\u5305\u53ef\u4ee5\u5199\u5728\u65b9\u6cd5\u5916\u8fb9\n\/\/caculate(){k,v->println(\"$k + $v = ${k+v}\")}\ncaculate{k,v->println(\"$k + $v = ${k+v}\")}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u7c7b\u578b\u8f6c\u6362:\u5f53\u9700\u8981\u65f6,\u7c7b\u578b\u4e4b\u95f4\u4f1a\u81ea\u52a8\u53d1\u751f\u7c7b\u578b\u8f6c\u6362: \u5b57\u7b26\u4e32\uff08String\uff09\u3001\u57fa\u672c\u7c7b\u578b(\u5982int) \u548c\u7c7b\u578b\u7684\u5305\u88c5\u7c7b […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[174],"tags":[181],"class_list":["post-4135","post","type-post","status-publish","format-standard","hentry","category-gradle-code","tag-gradle"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4135"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4135"}],"version-history":[{"count":24,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4135\/revisions"}],"predecessor-version":[{"id":4294,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4135\/revisions\/4294"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4135"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}