\u4eca\u5929\u5c31\u8ddf\u5927\u5bb6\u804a\u804a\u6709\u5173Java\u4e2d\u5e38\u7528\u7684jar\u5305\uff0c\u53ef\u80fd\u5f88\u591a\u4eba\u90fd\u4e0d\u592a\u4e86\u89e3\uff0c\u4e3a\u4e86\u8ba9\u5927\u5bb6\u66f4\u52a0\u4e86\u89e3\uff0c\u5c0f\u7f16\u7ed9\u5927\u5bb6\u603b\u7ed3\u4e86\u4ee5\u4e0b\u5185\u5bb9\uff0c\u5e0c\u671b\u5927\u5bb6\u6839\u636e\u8fd9\u7bc7\u6587\u7ae0\u53ef\u4ee5\u6709\u6240\u6536\u83b7\u3002<\/p>\n
\u4e00\u3001common-lang3<\/p>\n
\u7b80\u4ecb\uff1a\u4e00\u4e2a\u73b0\u5728\u6700\u4e3a\u5e38\u7528\u7684jar\u5305\uff0c\u5c01\u88c5\u4e86\u8bb8\u591a\u5e38\u7528\u7684\u5de5\u5177\u5305<\/p>\n
\u4f9d\u8d56\uff1a<\/p>\n
org.apache.commons<\/p>\n
commons-lang3<\/p>\n
3.4<\/p>\n
\u4e3b\u8981\u5e38\u89c1\u7684\u7c7b\u5982\u4e0b\uff1a\u6570\u7ec4\u5de5\u5177\u7c7b ArrayUtils<\/p>\n
\u65e5\u671f\u5de5\u5177\u7c7b DateUtils DateFormatUtils<\/p>\n
\u5b57\u7b26\u4e32\u5de5\u5177\u7c7b StringUtils<\/p>\n
\u6570\u5b57\u5de5\u5177\u7c7b NumberUtils<\/p>\n
\u5e03\u5c14\u5de5\u5177\u7c7b BooleanUtils<\/p>\n
\u53cd\u5c04\u76f8\u5173\u5de5\u5177\u7c7b FieldUtils\u3001MethodUtils\u3001MemberUtils\u3001TypeUtils\u3001ConstructorUtils<\/p>\n
\u5bf9\u8c61\u5de5\u5177\u7c7b ObjectUtils<\/p>\n
\u5e8f\u5217\u5316\u5de5\u5177\u7c7b SerializationUtils<\/p>\n
API\u4ecb\u7ecd<\/p>\n
\u8fd9\u91cc\u6211\u53ea\u4ecb\u7ecd\u7ecf\u5e38\u4f7f\u7528\u7684\u51e0\u4e2a\u5de5\u5177\u7c7b\u53ca\u65b9\u6cd5\uff0cArrayUtils\uff0cStringUtils\uff0cNumberUtils\uff0cDateUtils\uff0c\u5176\u4ed6\u7684\u8bf7\u67e5\u770b\u5b98\u65b9API\u6587\u6863\u5427<\/p>\n
1.ArrayUtils\u65b9\u6cd5\u540d\u8bf4\u660eadd<\/p>\n
remove<\/p>\n
clone\u590d\u5236\u6570\u7ec4<\/p>\n
addAll<\/p>\n
removeAll\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4f20\u5165\u9700\u8981\u5220\u9664\u7684\u4e0b\u6807(\u53ef\u4ee5\u6307\u5b9a\u591a\u4e2a\u4e0b\u6807)<\/p>\n
toObject\u628a\u6570\u503c(int[],double[])\u8f6c\u4e3a\u5305\u88c5\u7c7b(Int[],Double[])<\/p>\n
indexOf\u5728\u6570\u7ec4\u6309\u987a\u5e8f\u67e5\u627e\uff0c\u627e\u5230\u7b2c\u4e00\u4e2a\u6ee1\u8db3\u5bf9\u5e94\u7684\u6570\u503c\u7684\u4e0b\u6807<\/p>\n
lastIndexOf\u5728\u6570\u7ec4\u6309\u987a\u5e8f\u67e5\u627e\uff0c\u627e\u5230\u6700\u540e\u4e00\u4e2a\u6ee1\u8db3\u5bf9\u5e94\u7684\u6570\u503c\u7684\u4e0b\u6807<\/p>\n
contains\u6570\u7ec4\u662f\u5426\u5305\u542b\u67d0\u4e2a\u503c<\/p>\n
isEmpty\u5224\u65ad\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a<\/p>\n
isNotEmpty\u5224\u65ad\u6570\u7ec4\u662f\u5426\u4e0d\u4e3a\u7a7a<\/p>\n
reverse\u6570\u7ec4\u53cd\u8f6c<\/p>\n
subarray\u6307\u5b9a\u533a\u95f4\u622a\u53d6\u6570\u7ec4\uff0c\u533a\u95f4\u4e3a\u534a\u5f00\u533a\u95f4\uff0c\u4e0d\u5305\u542b\u672b\u5c3e<\/p>\n
toArray\u63a5\u6536\u4e00\u4e2a\u591a\u4e2a\u5bf9\u8c61\uff0c\u628a\u8fd9\u51e0\u4e2a\u5bf9\u8c61\u8f6c\u4e3a\u5bf9\u5e94\u7c7b\u578b\u7684\u6570\u7ec4<\/p>\n
toMap\u5c06\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4\u8f6c\u4e3aMap<\/p>\n
2.NumberUtils\u65b9\u6cd5\u540d\u8bf4\u660emin\u6bd4\u8f83\u4e09\u4e2a\u6570\uff0c\u8fd4\u56de\u6700\u5c0f\u503c \u6216\u6bd4\u8f83\u6307\u5b9a\u7684\u51e0\u4e2a\u6570\uff0c\u8fd4\u56de\u6700\u5c0f\u503c<\/p>\n
max\u6bd4\u8f83\u4e09\u4e2a\u6570\uff0c\u8fd4\u56de\u6700\u5927\u503c \u6216\u6bd4\u8f83\u6307\u5b9a\u7684\u51e0\u4e2a\u6570\uff0c\u8fd4\u56de\u6700\u5927\u503c<\/p>\n
createInt\u4ece\u4f20\u5165\u7684String\u4e2d\u521b\u5efa\u5bf9\u5e94\u7c7b\u578b\u7684\u6570\u503c\uff0ccreateDouble,createFloat…<\/p>\n
toInt\u5c06\u6307\u5b9a\u5b57\u7b26\u4e32\u8f6c\u4e3aInt\u7c7b\u578b\uff0c\u53ef\u4ee5\u9009\u62e9\u6307\u5b9a\u9ed8\u8ba4\u6570\u503c\uff0c\u5982\u679c\u5b57\u7b26\u4e32\u4e3anull\u5219\u8fd4\u56de\u9ed8\u8ba4\u6570\u503c\uff0c\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709toDouble,toLong…\u7b49\u8f6c\u4e3a\u4e0d\u540c\u7c7b\u578b\u7684\u65b9\u6cd5<\/p>\n
compare\u6bd4\u8f83\u4e24\u4e2a\u540c\u7c7b\u578b\u6570\u503c\u7684\u5927\u5c0f<\/p>\n
isDigits\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u53ea\u5305\u542b\u6570\u5b57<\/p>\n
isParsable\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u53ef\u8f6c\u6362\u4e3aLong,Int\u7b49\u7c7b\u578b<\/p>\n
isNumber\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u6570\u503c(0x,0X\u5f00\u5934\u7b49\u8fdb\u5236\u6570\u503c)<\/p>\n
3.DateUtils\u65b9\u6cd5\u540d\u8bf4\u660eparseDate\u5c06Date\u5bf9\u8c61\u8f6c\u4e3a\u5b57\u7b26\u4e32<\/p>\n
isSameDay\u5224\u65ad\u4e24\u4e2aDated\u5bf9\u8c61\u662f\u5426\u4e3a\u540c\u4e00\u5929<\/p>\n
isSameDay\u5224\u65ad\u4e24\u4e2aDated\u5bf9\u8c61\u662f\u5426\u4e3a\u540c\u4e00\u5929<\/p>\n
addHour\u5c06\u6307\u5b9a\u7684Date\u5bf9\u8c61\u52a0\u4e0a\u6307\u5b9a\u5c0f\u65f6\uff0c\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709addMonth,addDay..\u7b49<\/p>\n
DateFormatUtils\u6b63\u5982\u5176\u540d\uff0c\u662f\u7528\u6765\u628a\u65f6\u95f4\u8f6c\u4e3a\u5b57\u7b26\u4e32\uff0c\u8fd9\u91cc\u5c31\u4e0d\u518d\u591a\u8bf4<\/p>\n
4.StringUtils\u65b9\u6cd5\u540d\u8bf4\u660ejoin\u5c06\u6307\u5b9a\u7684\u6570\u7ec4\u8fde\u63a5\u6210\u5b57\u7b26\u4e32\uff0c\u5e76\u6dfb\u52a0\u6307\u5b9a\u7684\u5206\u5272\u5b57\u7b26<\/p>\n
containOnly\u5b57\u7b26\u4e32\u662f\u5426\u53ea\u5305\u542b\u67d0\u4e2a\u5b57\u7b26\u4e32<\/p>\n
substringBefore\u622a\u53d6\u6307\u5b9a\u5b57\u7b26\u4e32\u524d\u9762\u7684\u5185\u5bb9<\/p>\n
substringAfter\u622a\u53d6\u6307\u5b9a\u5b57\u7b26\u4e32\u540e\u9762\u7684\u5185\u5bb9(\u4e0d\u5305\u62ec\u6307\u5b9a\u5b57\u7b26\u4e32)<\/p>\n
substringBetween\u622a\u53d6\u5b57\u7b26\u4e32\u67d0\u533a\u95f4\u5185\u5bb9\uff0c\u5982substringBetween(“abcde”,”a”,”e”)=”bcd”<\/p>\n
difference\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\uff0c\u8fd4\u56de\u4e24\u4e2a\u5b57\u7b26\u4e32\u4e0d\u540c\u7684\u5185\u5bb9\uff0c\u5177\u4f53\u53ef\u4ee5\u770bAPI\u6587\u6863\u7ed9\u51fa\u7684\u793a\u4f8b<\/p>\n
isBlank\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u767d\uff0cnull,””,” “\u8fd9\u4e09\u4e2a\u7ed3\u679c\u90fd\u662f\u4e3atrue<\/p>\n
isEmpty\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a(\u53ea\u8981\u4e0d\u4e3anull\uff0c\u6216\u4f20\u5165\u7684String\u5bf9\u8c61\u7684\u957f\u5ea6\u4e0d\u4e3a0\u5373\u4e3atrue)<\/p>\n
countMatches\u5224\u65ad\u6307\u5b9a\u7684\u5b57\u7b26\u4e32\u5728\u67d0\u4e2a\u5b57\u7b26\u4e32\u4e2d\u51fa\u73b0\u7684\u6b21\u6570<\/p>\n
deleteWhitespace\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u7a7a\u683c<\/p>\n
defaultIfBlank\u5982\u679c\u5b57\u7b26\u4e32\u4e3a\u7a7a\u767d\uff0c\u5219\u8fd4\u56de\u4e00\u4e2a\u6307\u5b9a\u7684\u9ed8\u8ba4\u503c(null\u6216\u67d0\u4e2aString)<\/p>\n
defaultIfEmpty\u5982\u679c\u5b57\u7b26\u4e32\u4e3a\u7a7a\uff0c\u5219\u8fd4\u56de\u4e00\u4e2a\u6307\u5b9a\u7684\u9ed8\u8ba4\u503c(null\u6216\u67d0\u4e2aString)<\/p>\n
capitalize\u5c06\u6307\u5b9a\u5b57\u7b26\u4e32\u9996\u5b57\u6bcd\u5927\u5199<\/p>\n
abbreviate\u5c06\u6307\u5b9a\u5b57\u7b26\u4e32\u7684\u540e\u9762\u4e09\u4f4d\u8f6c\u4e3a…<\/p>\n
swapCase\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u6bcd\u5927\u5c0f\u5199\u53cd\u8f6c,\u5982aBc\u53d8\u4e3aAbC<\/p>\n
lowerCase\u5c06\u5b57\u7b26\u4e32\u7684\u5b57\u6bcd\u5168\u90e8\u8f6c\u4e3a\u5c0f\u5199<\/p>\n
upperCase\u5c06\u5b57\u7b26\u4e32\u7684\u5b57\u6bcd\u5168\u90e8\u8f6c\u4e3a\u5927\u5199<\/p>\n
left\u53d6\u5b57\u7b26\u4e32\u5de6\u8fb9\u51e0\u4e2a\u5b57\u7b26\uff0c\u5982left(“hello”,3)=”hel”\uff0cright\u4e0e\u6b64\u76f8\u53cd<\/p>\n
leftPad\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u4e0d\u591f\uff0c\u5219\u4f7f\u7528\u6307\u5b9a\u5b57\u7b26\u586b\u5145\u6307\u5b9a\u5b57\u7b26\u4e32\uff0c\u5982leftPad(“hel”,5,”z”)=”zzhel”,rightPad\u65b9\u6cd5\u4e0e\u6b64\u76f8\u53cd<\/p>\n
prependIfMissing\u6307\u5b9a\u5b57\u7b26\u4e32\u4e0d\u4ee5\u67d0\u6bb5\u5b57\u7b26\u4e32\u5f00\u5934\uff0c\u5219\u81ea\u52a8\u6dfb\u52a0\u5f00\u5934\uff0c\u5982prependIfMissing(“hello”,”li”)=”lihello”<\/p>\n
prependIfMissing\u6307\u5b9a\u5b57\u7b26\u4e32\u4e0d\u4ee5\u67d0\u6bb5\u5b57\u7b26\u4e32\u5f00\u5934(\u5ffd\u7565\u5927\u5c0f\u5199)\uff0c\u5219\u81ea\u52a8\u6dfb\u52a0\u5f00\u5934<\/p>\n
getCommonPrefix\u83b7\u5f97\u591a\u4e2a\u5b57\u7b26\u4e32\u76f8\u540c\u7684\u5f00\u5934\u5185\u5bb9\uff0c\u63a5\u6536\u53c2\u6570\u4e3a\u591a\u4e2a\u5b57\u7b26\u4e32<\/p>\n
removeEnd\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u7ed3\u5c3e(\u6ee1\u8db3\u662f\u4ee5\u67d0\u6bb5\u5185\u5bb9\u7ed3\u5c3e)\uff0c\u5982removeEnd(“hello”,”llo”)=”he”<\/p>\n
removeEndIgnoreCase\u4e0e\u4e0a\u9762\u4e00\u6837\uff0c\u5ffd\u7565\u5927\u5c0f\u5199<\/p>\n
removeStart\u4e0e\u4e0a\u9762\u7684\u76f8\u53cd<\/p>\n
remove\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u6307\u5b9a\u5185\u5bb9\uff0c\u5982remove(“hello”,”l”)=”heo”<\/p>\n
removeIgnoreCase\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u6307\u5b9a\u5185\u5bb9\uff0c\u5982remove(“hello”,”l”)=”heo”<\/p>\n
strip\u6e05\u9664\u5b57\u7b26\u4e32\u5f00\u5934\u548c\u672b\u5c3e\u6307\u5b9a\u7684\u5b57\u7b26(\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3anull,\u7528\u6765\u6e05\u9664\u5b57\u7b26\u4e32\u5f00\u5934\u548c\u672b\u5c3e\u7684\u7a7a\u683c)\uff0c\u5982strip(” abcxy”,”xy”)=” abc”,strip(” abcxy”,”yx”)=” abc”<\/p>\n
stripStart\u6e05\u9664\u5b57\u7b26\u4e32\u5f00\u5934\u6307\u5b9a\u5b57\u7b26<\/p>\n
stripEnd\u6e05\u9664\u5b57\u7b26\u4e32\u672b\u5c3e\u6307\u5b9a\u7684\u5b57\u7b26<\/p>\n
\u4e8c\u3001common-io<\/p>\n
\u7b80\u4ecb\uff1a\u5e38\u7528\u7684IO\u6d41\u5de5\u5177\u5305<\/p>\n
commons-io<\/p>\n
commons-io<\/p>\n
2.6<\/p>\n
\u6211\u4eec\u4e3b\u8981\u5173\u5fc3\u7684\u5c31\u662fUtils\u540e\u7f00\u7684\u90a3\u51e0\u4e2a\u7c7b\u5373\u53ef\uff0c\u53ef\u4ee5\u770b\u5230\uff0ccommon-io\u5e93\u63d0\u4f9b\u4e86FileUtils,FileSystemUtils,FileNameUtils,FileFilterUtils,IOUtils<\/p>\n
FileUtils<\/p>\n
\u25cf \u5199\u51fa\u6587\u4ef6<\/p>\n
\u25cf \u8bfb\u53d6\u6587\u4ef6<\/p>\n
\u25cf \u521b\u5efa\u4e00\u4e2a\u6709\u7236\u7ea7\u6587\u4ef6\u5939\u7684\u6587\u4ef6\u5939<\/p>\n
\u25cf \u590d\u5236\u6587\u4ef6\u548c\u6587\u4ef6\u5939<\/p>\n
\u25cf \u5220\u9664\u6587\u4ef6\u548c\u6587\u4ef6\u5939<\/p>\n
\u25cf URL\u8f6c\u6587\u4ef6<\/p>\n
\u25cf \u901a\u8fc7\u8fc7\u6ee4\u5668\u548c\u6269\u5c55\u540d\u6765\u7b5b\u9009\u6587\u4ef6\u548c\u6587\u4ef6\u5939<\/p>\n
\u25cf \u6bd4\u8f83\u6587\u4ef6\u5185\u5bb9<\/p>\n
\u25cf \u6587\u4ef6\u6700\u540e\u4fee\u6539\u65f6\u95f4<\/p>\n
\u25cf \u6587\u4ef6\u6821\u9a8c<\/p>\n
FileSystemUtils<\/p>\n
\u5173\u4e8e\u6587\u4ef6\u7cfb\u7edf\u7684\u76f8\u5173\u64cd\u4f5c\uff0c\u5982\u67e5\u770bC\u76d8\u7684\u5927\u5c0f\uff0c\u5269\u4f59\u5927\u5c0f\u7b49\u64cd\u4f5c<\/p>\n
IOUtils<\/p>\n
\u5b57\u9762\u610f\u601d\uff0c\u662f\u5c01\u88c5\u4e86IO\u6d41\u7684\u5404\u79cd\u64cd\u4f5c\u7684\u5de5\u5177\u7c7b<\/p>\n
\u4e09\u3001Log4j<\/p>\n
\u7b80\u4ecb\uff1aLog4J \u662f Apache \u7684\u4e00\u4e2a\u5f00\u6e90\u9879\u76ee\uff0c\u901a\u8fc7\u5728\u9879\u76ee\u4e2d\u4f7f\u7528 Log4J\uff0c\u6211\u4eec\u53ef\u4ee5\u63a7\u5236\u65e5\u5fd7\u4fe1\u606f\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3001\u6587\u4ef6\u3001GUI \u7ec4\u4ef6\u3001\u751a\u81f3\u662f\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u63a7\u5236\u6bcf\u4e00\u6761\u65e5\u5fd7\u7684\u8f93\u51fa\u683c\u5f0f\uff0c\u901a\u8fc7\u5b9a\u4e49\u65e5\u5fd7\u7684\u8f93\u51fa\u7ea7\u522b\uff0c\u53ef\u4ee5\u66f4\u7075\u6d3b\u7684\u63a7\u5236\u65e5\u5fd7\u7684\u8f93\u51fa\u8fc7\u7a0b\uff0c\u65b9\u4fbf\u9879\u76ee\u7684\u8c03\u8bd5\u3002<\/p>\n
\u4f9d\u8d56\uff1a<\/p>\n
log4j<\/p>\n
log4j<\/p>\n
1.2.17<\/p>\n
\u7ed3\u6784<\/p>\n
Log4J \u4e3b\u8981\u7531 Loggers (\u65e5\u5fd7\u8bb0\u5f55\u5668)\u3001Appenders(\u8f93\u51fa\u7aef)\u548c Layout(\u65e5\u5fd7\u683c\u5f0f\u5316\u5668)\u7ec4\u6210\u3002<\/p>\n
\u5176\u4e2dLoggers \u63a7\u5236\u65e5\u5fd7\u7684\u8f93\u51fa\u7ea7\u522b\u4e0e\u65e5\u5fd7\u662f\u5426\u8f93\u51fa\uff1b<\/p>\n
Appenders \u6307\u5b9a\u65e5\u5fd7\u7684\u8f93\u51fa\u65b9\u5f0f(\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3001\u6587\u4ef6\u7b49)\uff1b<\/p>\n
Layout \u63a7\u5236\u65e5\u5fd7\u4fe1\u606f\u7684\u8f93\u51fa\u683c\u5f0f\u3002<\/p>\n
\u65e5\u5fd7\u7ea7\u522b\uff1a\u7ea7\u522b\u8bf4\u660eOFF\u6700\u9ad8\u65e5\u5fd7\u7ea7\u522b\uff0c\u5173\u95ed\u5de6\u53f3\u65e5\u5fd7<\/p>\n
FATAL\u5c06\u4f1a\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u9000\u51fa\u7684\u9519\u8bef<\/p>\n
ERROR\u53d1\u751f\u9519\u8bef\u4e8b\u4ef6\uff0c\u4f46\u4ecd\u4e0d\u5f71\u54cd\u7cfb\u7edf\u7684\u7ee7\u7eed\u8fd0\u884c<\/p>\n
WARN\u8b66\u544a\uff0c\u5373\u6f5c\u5728\u7684\u9519\u8bef\u60c5\u5f62<\/p>\n
INFO\u4e00\u822c\u548c\u5728\u7c97\u7c92\u5ea6\u7ea7\u522b\u4e0a\uff0c\u5f3a\u8c03\u5e94\u7528\u7a0b\u5e8f\u7684\u8fd0\u884c\u5168\u7a0b<\/p>\n
DEBUG\u4e00\u822c\u7528\u4e8e\u7ec6\u7c92\u5ea6\u7ea7\u522b\u4e0a\uff0c\u5bf9\u8c03\u8bd5\u5e94\u7528\u7a0b\u5e8f\u975e\u5e38\u6709\u5e2e\u52a9<\/p>\n
ALL\u6700\u4f4e\u7b49\u7ea7\uff0c\u6253\u5f00\u6240\u6709\u65e5\u5fd7\u8bb0\u5f55<\/p>\n
\u6211\u4eec\u4e3b\u8981\u4f7f\u7528\u8fd9\u56db\u4e2a\uff1aError>Warn>Info>Debug<\/p>\n
\u4f7f\u7528<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u65b9\u5f0f\u6765\u8fd0\u884cLog4j\uff0c\u4e00\u79cd\u662fjava\u4ee3\u7801\u65b9\u5f0f\uff0c\u53e6\u5916\u4e00\u79cd\u5219\u662f\u914d\u7f6e\u6587\u4ef6\u65b9\u5f0f<\/p>\n
\u4f8b\u5b50(Java\u65b9\u5f0f)public class Log4JTest {undefined<\/p>\n
public static void main(String[] args) {undefined<\/p>\n
\/\/\u83b7\u53d6Logger\u5bf9\u8c61\u7684\u5b9e\u4f8b(\u4f20\u5165\u5f53\u524d\u7c7b)<\/p>\n
Logger logger = Logger.getLogger(Log4JTest.class);<\/p>\n
\/\/\u4f7f\u7528\u9ed8\u8ba4\u7684\u914d\u7f6e\u4fe1\u606f\uff0c\u4e0d\u9700\u8981\u5199log4j.properties<\/p>\n
BasicConfigurator.configure();<\/p>\n
\/\/\u8bbe\u7f6e\u65e5\u5fd7\u8f93\u51fa\u7ea7\u522b\u4e3aWARN\uff0c\u8fd9\u5c06\u8986\u76d6\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\u7684\u7ea7\u522b\uff0c\u53ea\u6709\u65e5\u5fd7\u7ea7\u522b\u4f4e\u4e8eWARN\u7684\u65e5\u5fd7\u624d\u8f93\u51fa<\/p>\n
logger.setLevel(Level.WARN);<\/p>\n
logger.debug(“\u8fd9\u662fdebug”);<\/p>\n
logger.info(“\u8fd9\u662finfo”);<\/p>\n
logger.warn(“\u8fd9\u662fwarn”);<\/p>\n
logger.error(“\u8fd9\u662ferror”);<\/p>\n
logger.fatal(“\u8fd9\u662ffatal”);<\/p>\n
}<\/p>\n
}<\/p>\n
\u4f8b\u5b50(\u914d\u7f6e\u6587\u4ef6\u65b9\u5f0f)<\/p>\n
\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u60f3\u8981\u5b9e\u73b0\u6253\u5370Log\uff0c\u4f46\u662f\u6bcf\u6b21\u90fd\u8981\u5199\u4e00\u904d\uff0c\u6d6a\u8d39\u65f6\u95f4\u548c\u7cbe\u529b\uff0c\u6240\u4ee5\uff0cLog4j\u63d0\u4f9b\u4e86\u53e6\u5916\u4e00\u79cd\u65b9\u5f0f\u6765\u914d\u7f6e\u597d\u6211\u4eec\u7684\u4fe1\u606f<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u540d\u4e3alog4j.properties\u7684\u6587\u4ef6\uff0c\u6b64\u6587\u4ef6\u9700\u8981\u653e\u5728\u9879\u76ee\u7684\u6839\u76ee\u5f55(\u7ea6\u5b9a)\uff0c\u5982\u679c\u662fmaven\u9879\u76ee\uff0c\u76f4\u63a5\u653e\u5728resources\u6587\u4ef6\u5939\u4e2d\u5373\u53ef<\/p>\n
log4j.properties#\u63a7\u5236\u53f0<\/p>\n
log4j.appender.Console=org.apache.log4j.ConsoleAppender<\/p>\n
log4j.appender.Console.layout=org.apache.log4j.PatternLayout<\/p>\n
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] – %m%n<\/p>\n
#log jdbc<\/p>\n
log4j.logger.java.sql.ResultSet=INFO<\/p>\n
log4j.logger.org.apache=WARN<\/p>\n
log4j.logger.java.sql.Connection=DEBUG<\/p>\n
log4j.logger.java.sql.Statement=DEBUG<\/p>\n
log4j.logger.java.sql.PreparedStatement=DEBUG<\/p>\n
#log mybatis\u8bbe\u7f6e<\/p>\n
#log4j.logger.org.apache.ibatis=DEBUG<\/p>\n
log4j.logger.org.apache.ibatis.jdbc=error<\/p>\n
log4j.logger.org.apache.ibatis.io=info<\/p>\n
log4j.logger.org.apache.ibatis.datasource=info<\/p>\n
#springMVC\u65e5\u5fd7<\/p>\n
log4j.logger.org.springframework.web=WARN<\/p>\n
# \u6587\u4ef6\u8f93\u51fa\u914d\u7f6e<\/p>\n
log4j.appender.A = org.apache.log4j.DailyRollingFileAppender<\/p>\n
log4j.appender.A.File = D:\/log.txt #\u6307\u5b9a\u65e5\u5fd7\u7684\u8f93\u51fa\u8def\u5f84<\/p>\n
log4j.appender.A.Append = true<\/p>\n
log4j.appender.A.Threshold = DEBUG<\/p>\n
log4j.appender.A.layout = org.apache.log4j.PatternLayout #\u4f7f\u7528\u81ea\u5b9a\u4e49\u65e5\u5fd7\u683c\u5f0f\u5316\u5668<\/p>\n
log4j.appender.A.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] – [ %p ] %m%n #\u6307\u5b9a\u65e5\u5fd7\u7684\u8f93\u51fa\u683c\u5f0f<\/p>\n
log4j.appender.A.encoding=UTF-8 #\u6307\u5b9a\u65e5\u5fd7\u7684\u6587\u4ef6\u7f16\u7801<\/p>\n
#\u6307\u5b9a\u65e5\u5fd7\u7684\u8f93\u51fa\u7ea7\u522b\u4e0e\u8f93\u51fa\u7aef<\/p>\n
log4j.rootLogger=DEBUG,Console,A<\/p>\n
#\u6307\u5b9a\u67d0\u4e2a\u5305\u540d\u65e5\u5fd7\u7ea7\u522b(\u4e0d\u80fd\u8d85\u8fc7\u4e0a\u9762\u5b9a\u4e49\u7684\u7ea7\u522b\uff0c\u5426\u5219\u65e5\u5fd7\u4e0d\u4f1a\u8f93\u51fa)<\/p>\n
log4j.logger.com.wan=DEBUG<\/p>\n
\u4e4b\u540e\u4f7f\u7528\u7684\u8bdd\u5c31\u6bd4\u8f83\u7b80\u5355\u4e86\/\/Logger\u7684\u521d\u59cb\u5316(\u8fd9\u4e2a\u63a8\u8350\u5b9a\u4e49\u4e3a\u5168\u5c40\u53d8\u91cf\uff0c\u65b9\u4fbf\u4f7f\u7528)<\/p>\n
Logger logger = Logger.getLogger(Log4JTest.class);<\/p>\n
\/\/\u8f93\u51faLog<\/p>\n
logger.info(“\u8fd9\u662finfo”);<\/p>\n
\u56db\u3001lombok<\/p>\n
\u7b80\u4ecb\uff1a\u5e73\u5e38\u6211\u4eec\u521b\u5efa\u5b9e\u4f53\u7c7b\u7684\u65f6\u5019\uff0c\u9700\u8981get\/set\u65b9\u6cd5\uff0c\u6781\u5176\u9ebb\u70e6\uff0c\u867d\u7136IDEA\u7b49IDE\u90fd\u662f\u6709\u63d0\u4f9b\u4e86\u5feb\u6377\u751f\u6210\uff0c\u4e0d\u8fc7\uff0c\u6700\u597d\u7684\u89e3\u51b3\u65b9\u6cd5\u8fd8\u662f\u7701\u7565\u4e0d\u5199<\/p>\n
\u800clombok\u5c31\u662f\u8fd9\u6837\u7684\u4e00\u4e2a\u6846\u67b6\uff0c\u5b9e\u73b0\u7701\u7565get\/set\u65b9\u6cd5\uff0c\u5f53\u7136\uff0clombok\u7684\u529f\u80fd\u4e0d\u53ea\u6709\u6b64\uff0c\u8fd8\u6709equal\uff0ctoString\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u7531\u6b64\u6846\u67b6\u81ea\u52a8\u751f\u6210<\/p>\n
lombok\u7684\u539f\u7406\u662f\u4f7f\u7528\u6ce8\u89e3\uff0c\u4e4b\u540e\u5c31\u4f1a\u5728\u7f16\u8bd1\u8fc7\u7a0b\u4e2d\uff0c\u7ed9Class\u6587\u4ef6\u81ea\u52a8\u52a0\u4e0aget\/set\u7b49\u65b9\u6cd5<\/p>\n
\u4e0d\u8fc7IDEA\u4f3c\u4e4e\u65e0\u6cd5\u8bc6\u522b\uff0c\u4ee3\u7801\u68c0\u67e5\u8fd8\u662f\u4f1a\u62a5\u9519\uff0c\u6240\u4ee5\uff0c\u4f7f\u7528IDEA\u7684\u65f6\u5019\u8fd8\u5f97\u5b89\u88c5\u4e00\u4e2a\u63d2\u4ef6\uff0c\u5728plugin\u641c\u7d22lombok\uff0c\u4e4b\u540e\u5b89\u88c5\u91cd\u542f\u5373\u53ef\u3002<\/p>\n
\u4e4b\u540e\u4e3aJava\u9879\u76ee\u6dfb\u52a0\u4f9d\u8d56<\/p>\n
org.projectlombok<\/p>\n
lombok<\/p>\n
1.18.8<\/p>\n
provided<\/p>\n
\u4f7f\u7528\u793a\u4f8b<\/p>\n
1.\u5b9e\u4f53\u7c7b\u7701\u7565get\/set<\/p>\n
\u4f30\u8ba1Kotlin\u4e2d\u7684data\u5173\u952e\u5b57\u5c31\u662f\u53c2\u7167\u7740lombok\u5b9e\u73b0\u7684\/\/\u8fd9\u91cc\u6211\u4eec\u53ea\u9700\u8981\u4e3a\u7c7b\u6dfb\u52a0Data\u6ce8\u89e3\uff0c\u5c31\u4f1a\u81ea\u52a8\u751f\u6210\u5bf9\u5e94\u5c5e\u6027\u7684get\/set\u65b9\u6cd5\uff0ctoString\uff0cequal\u7b49\u65b9\u6cd5<\/p>\n
@Data<\/p>\n
public class User {undefined<\/p>\n
private String username;<\/p>\n
private String password;<\/p>\n
}<\/p>\n
2.\u9700\u8981\u65e0\u53c2\u6784\u9020\u4ee5\u53caget\/set\u65b9\u6cd5@Getter<\/p>\n
@Setter<\/p>\n
@NoArgsConstructor<\/p>\n
public class User {undefined<\/p>\n
private String username;<\/p>\n
private String password;<\/p>\n
}<\/p>\n
3.\u94fe\u5f0f\u8c03\u7528set\u65b9\u6cd5@Data<\/p>\n
@Accessors(chain = true)<\/p>\n
public class User {undefined<\/p>\n
private String username;<\/p>\n
private String password;<\/p>\n
}<\/p>\n
\/\/\u4f7f\u7528<\/p>\n
User user = new User();<\/p>\n
user.setUsername(“helo”).setPassword(“123”);<\/p>\n
4.\u53c2\u6570\u4e0d\u4e3a\u7a7a\/\/\u5982\u679c\u8c03\u7528\u6b64\u65b9\u6cd5\uff0c\u5c31\u4f1a\u62b1\u4e00\u4e2a\u7a7a\u6307\u9488\u9519\u8bef<\/p>\n
public String print(@NotNull String str){undefined<\/p>\n
…<\/p>\n
}<\/p>\n
5.\u53ea\u9700\u8981toString@ToString(callSuper=true, includeFieldNames=true)<\/p>\n
public class User {undefined<\/p>\n
private String username;<\/p>\n
private String password;<\/p>\n
\/\/\u7701\u7565\u7684get\/set\u65b9\u6cd5<\/p>\n
}<\/p>\n
6.builder\u6a21\u5f0f\u521b\u5efa\u5b9e\u4f53\u7c7b\u5bf9\u8c61@Data<\/p>\n
@Builder<\/p>\n
public class User {undefined<\/p>\n
private String username;<\/p>\n
private String password;<\/p>\n
}<\/p>\n
\/\/\u4f7f\u7528<\/p>\n
User user1 = User.builder().username(“user1”).password(“123”).build();<\/p>\n
7.\u5de5\u5177\u7c7b@UtilityClass<\/p>\n
public class MyUtils{undefined<\/p>\n
\/\/\u4f1a\u5c06\u6b64\u65b9\u6cd5\u81ea\u52a8\u8f6c\u4e3a\u9759\u6001\u65b9\u6cd5<\/p>\n
public void print(String str){undefined<\/p>\n
…<\/p>\n
}<\/p>\n
}<\/p>\n
\/\/\u4f7f\u7528<\/p>\n
MyUtils.print(“hello”);<\/p>\n
8.\u81ea\u52a8\u5173\u95ed\u6d41public static void main(String[] args) throws Exception {undefined<\/p>\n
\/\/\u4f7f\u7528Cleanup\u4f1a\u81ea\u52a8\u8c03\u7528close\u65b9\u6cd5<\/p>\n
@Cleanup InputStream in = new FileInputStream(args[0]);<\/p>\n
@Cleanup OutputStream out = new FileOutputStream(args[1]);<\/p>\n
byte[] b = new byte[1024];<\/p>\n
while (true) {undefined<\/p>\n
int r = in.read(b);<\/p>\n
if (r == -1) break;<\/p>\n
out.write(b, 0, r);<\/p>\n
}<\/p>\n
}<\/p>\n
9.\u7701\u7565Logger\u65f6\u7684\u521d\u59cb\u5316@Log4j<\/p>\n
@Log<\/p>\n
public class User{undefined<\/p>\n
\/\/\u4f1a\u81ea\u52a8\u6dfb\u52a0\u6b64\u8bed\u53e5<\/p>\n
\/\/Logger logger = Logger.getLogger(User.class);<\/p>\n
…<\/p>\n
}<\/p>\n
\u770b\u5b8c\u4e0a\u8ff0\u5185\u5bb9\uff0c\u4f60\u4eec\u5bf9Java\u4e2d\u5e38\u7528\u7684jar\u5305\u6709\u8fdb\u4e00\u6b65\u7684\u4e86\u89e3\u5417\uff1f<\/p>\n
<\/p>\n
\u6709\u51e0\u4e2a\u5e38\u7528\u7684jar\u5305\u7684\u5730\u5740<\/p>\n
\u6bd4\u5982<\/p>\n
https:\/\/www.cnblogs.com\/<\/p>\n
http:\/\/maven.apache.org\/download.cgi<\/p>\n
http:\/\/maven.aliyun.com\/nexus\/content\/groups\/public\/<\/p>\n
https:\/\/mvnrepository.com\/artifact\/org.bouncycastle\/bcprov-jdk16\/1.45<\/p>\n
maven\u4f9d\u8d56\u7684\u4e0d\u80fd\u6dfb\u52a0\uff0c\u53ea\u80fd\u9760\u624b\u52a8\u6302\u9760<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4eca\u5929\u5c31\u8ddf\u5927\u5bb6\u804a\u804a\u6709\u5173Java\u4e2d\u5e38\u7528\u7684jar\u5305\uff0c\u53ef\u80fd\u5f88\u591a\u4eba\u90fd\u4e0d\u592a\u4e86\u89e3\uff0c\u4e3a\u4e86\u8ba9\u5927\u5bb6\u66f4\u52a0\u4e86\u89e3\uff0c\u5c0f\u7f16\u7ed9\u5927\u5bb6\u603b\u7ed3\u4e86\u4ee5\u4e0b\u5185\u5bb9\uff0c\u5e0c\u671b\u5927\u5bb6\u6839\u636e\u8fd9\u7bc7\u6587\u7ae0\u53ef\u4ee5\u6709\u6240\u6536\u83b7\u3002 \u4e00\u3001common-lang3 \u7b80\u4ecb\uff1a\u4e00\u4e2a\u73b0\u5728\u6700\u4e3a\u5e38\u7528\u7684jar\u5305\uff0c\u5c01\u88c5\u4e86\u8bb8\u591a\u5e38\u7528\u7684\u5de5\u5177\u5305 \u4f9d…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[451],"tags":[584,455],"topic":[],"class_list":["post-69091","post","type-post","status-publish","format-standard","hentry","category-java","tag-jar","tag-java"],"_links":{"self":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/69091","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/comments?post=69091"}],"version-history":[{"count":3,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/69091\/revisions"}],"predecessor-version":[{"id":69095,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/69091\/revisions\/69095"}],"wp:attachment":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/media?parent=69091"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/categories?post=69091"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/tags?post=69091"},{"taxonomy":"topic","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/topic?post=69091"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}