\u4ee5\u4e0a 7 \u79cd\u4f20\u64ad\u673a\u5236\uff0c\u53ef\u6839\u636e\u201c\u662f\u5426\u652f\u6301\u5f53\u524d\u4e8b\u52a1\u201d\u7684\u7ef4\u5ea6\u5206\u4e3a\u4ee5\u4e0b 3 \u7c7b\uff1a
\u770b\u5230\u8fd9\u91cc\uff0c\u6709\u4eba\u53ef\u80fd\u4f1a\u8bf4\uff1a\u8bf4\u4e86\u8fd9\u4e48\u591a\uff0c\u6211\u4e5f\u770b\u4e0d\u61c2\u554a\uff0c\u5373\u4f7f\u770b\u61c2\u4e86\uff0c\u6211\u4e5f\u8bb0\u4e0d\u4f4f\u554a\uff1f\u8fd9\u8981\u548b\u6574\uff1f<\/p>\n
\u6ca1\u5173\u7cfb\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u7528\u4e00\u4e2a\u4f8b\u5b50\uff0c\u6765\u8bf4\u660e\u8fd9 3 \u7c7b\u4e8b\u52a1\u4f20\u64ad\u673a\u5236\u7684\u533a\u522b\u3002<\/p>\n
\u4ee5\u60c5\u4fa3\u4e4b\u95f4\u662f\u5426\u8981\u4e70\u623f\u4e3a\u4f8b\uff0c\u6211\u4eec\u5c06\u4ee5\u4e0a 3 \u7c7b\u4e8b\u52a1\u4f20\u64ad\u673a\u5236\u53ef\u4ee5\u770b\u4f5c\u662f\u604b\u7231\u4e2d\u7684 3 \u7c7b\u5973\u751f\u7c7b\u578b\uff1a<\/p>\n
- \n
- \u666e\u901a\u578b<\/li>\n
- \u5f3a\u52bf\u578b<\/li>\n
- \u61c2\u4e8b\u578b<\/li>\n<\/ul>\n
\u8fd9\u4e09\u7c7b\u5973\u751f\u5982\u4e0b\u56fe\u6240\u793a\uff1a
\u652f\u6301\u5f53\u524d\u4e8b\u52a1\u7684\u201c\u5973\u751f\u201d\uff0c\u8fd9\u91cc\u7684\u4e8b\u52a1\u6307\u7684\u662f\u201c\u623f\u5b50\u201d\uff0c\u5b83\u5206\u4e3a 3 \u79cd\uff08\u666e\u901a\u578b\u5973\u751f\uff09\uff1a<\/p>\n- \n
- Propagation.REQUIRED\uff08\u9700\u8981\u6709\u623f\u5b50\uff09\uff1a\u6709\u623f\u5b50\u4e86\u54b1\u4eec\u4e00\u8d77\u4f4f\uff0c\u6ca1\u623f\u5b50\u4e86\u54b1\u4eec\u4e00\u8d77\u8d5a\u94b1\u4e70\u623f\u5b50\u3002<\/li>\n
- Propagation.SUPPORTS\uff08\u53ef\u4ee5\u6709\u623f\u5b50\uff09\uff1a\u6709\u623f\u5b50\u4e86\u5c31\u4e00\u8d77\u4f4f\uff0c\u6ca1\u623f\u5b50\u4e86\u54b1\u4eec\u5c31\u4e00\u8d77\u79df\u623f\u5b50\u3002<\/li>\n
- Propagation.MANDATORY\uff08\u5f3a\u5236\u6709\u623f\u5b50\uff09\uff1a\u6709\u623f\u5b50\u4e86\u5c31\u4e00\u8d77\u4f4f\uff0c\u6ca1\u623f\u5b50\u4e86\u5c31\u5206\u624b\u3002<\/li>\n<\/ul>\n
\u4e0d\u652f\u6301\u5f53\u524d\u4e8b\u52a1\u7684\u201c\u5973\u751f\u201d\u4e5f\u5206\u4e3a 3 \u79cd\uff08\u5f3a\u52bf\u578b\u6216\u8005\u53eb\u4e8b\u4e1a\u578b\uff09\uff1a<\/p>\n
- \n
- Propagation.REQUIRES_NEW\uff1a\u4e0d\u8981\u4f60\u7684\u623f\u5b50\uff0c\u5fc5\u987b\u4e00\u8d77\u8d5a\u94b1\u4e70\u623f\u5b50\u3002<\/li>\n
- Propagation.NOT_SUPPORTED\uff1a\u4e0d\u8981\u4f60\u7684\u623f\u5b50\uff0c\u5fc5\u987b\u4e00\u8d77\u79df\u623f\u5b50\u3002<\/li>\n
- Propagation.NEVER\uff1a\u5fc5\u987b\u4e00\u8d77\u79df\u623f\u5b50\uff0c\u4f60\u6709\u623f\u5b50\u5c31\u5206\u624b\u3002<\/li>\n<\/ul>\n
\u6700\u540e\u4e00\u79cd\u662f\u5d4c\u5957\u6027\u4e8b\u52a1 Propagation.NESTED\uff0c\u5b83\u5c5e\u4e8e\u61c2\u4e8b\u578b\u5973\u53cb\uff0c\u5982\u679c\u6709\u623f\u5b50\u4e86\u5c31\u4ee5\u623f\u5b50\u4e3a\u57fa\u7840\u505a\u70b9\u5c0f\u751f\u610f\uff0c\u5356\u4e2a\u82b1\u751f\u3001\u6c34\u679c\u5565\u7684\uff0c\u5982\u679c\u4e70\u5356\u6210\u4e86\uff0c\u90a3\u5c31\u7ee7\u7eed\u53d1\u5c55\uff1b\u5982\u679c\u5931\u8d25\u4e86\uff0c\u81f3\u5c11\u8fd8\u6709\u623f\u5b50\uff1b\u5982\u679c\u6ca1\u623f\u5b50\u4e5f\u6ca1\u5173\u7cfb\uff0c\u4e00\u8d77\u8d5a\u94b1\u4e70\u623f\u5b50\u3002<\/p>\n
\u4e8b\u52a1\u4f20\u64ad\u673a\u5236\u4f7f\u7528\u4e0e\u6f14\u793a<\/h2>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u6f14\u793a\u4e00\u4e0b\u4e8b\u52a1\u4f20\u64ad\u673a\u5236\u7684\u4f7f\u7528\uff0c\u4ee5\u4e0b\u9762 3 \u4e2a\u6700\u5178\u578b\u7684\u4e8b\u52a1\u4f20\u64ad\u7ea7\u522b\u4e3a\u4f8b\uff1a<\/p>\n
- \n
- \u652f\u6301\u5f53\u524d\u4e8b\u52a1\u7684 REQUIRED\uff1b<\/li>\n
- \u4e0d\u652f\u6301\u5f53\u524d\u4e8b\u52a1\u7684 REQUIRES_NEW\uff1b<\/li>\n
- \u5d4c\u5957\u4e8b\u52a1 NESTED\u3002<\/li>\n<\/ul>\n
\u4e0b\u6765\u6211\u4eec\u5206\u522b\u6765\u770b\u3002<\/p>\n
\u4e8b\u52a1\u4f20\u64ad\u673a\u5236\u7684\u793a\u4f8b\uff0c\u9700\u8981\u7528\u5230\u4ee5\u4e0b\u4e24\u5f20\u8868\uff1a<\/p>\n
-- \u7528\u6237\u8868\nCREATE TABLE `user` (\n `id` int(11) NOT NULL AUTO_INCREMENT,\n `name` varchar(255) COLLATE utf8mb4_bin DEFAULT NULL,\n `password` varchar(255) COLLATE utf8mb4_bin DEFAULT NULL,\n `createtime` datetime DEFAULT CURRENT_TIMESTAMP,\n PRIMARY KEY (`id`) USING BTREE\n) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ROW_FORMAT=DYNAMIC;\n\n-- \u65e5\u5fd7\u8868\nCREATE TABLE `log` (\n `id` int(11) NOT NULL AUTO_INCREMENT,\n `content` text NULL,\n PRIMARY KEY (`id`)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;<\/code><\/pre>\n\u521b\u5efa\u4e00\u4e2a Spring Boot \u9879\u76ee\uff0c\u6838\u5fc3\u4e1a\u52a1\u4ee3\u7801\u6709 3 \u4e2a\uff1aUserController\u3001UserServcie \u4ee5\u53ca LogService\u3002\u5728 UserController \u91cc\u9762\u8c03\u7528 UserService \u6dfb\u52a0\u7528\u6237\uff0c\u5e76\u8c03\u7528 LogService \u6dfb\u52a0\u65e5\u5fd7\u3002<\/p>\n
REQUIRED \u4f7f\u7528\u6f14\u793a<\/h3>\n
REQUIRED \u652f\u6301\u5f53\u524d\u4e8b\u52a1\u3002
UserController \u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff0c\u5176\u4e2d save \u65b9\u6cd5\u5f00\u542f\u4e86\u4e8b\u52a1\uff1a<\/p>\n@RestController\npublic class UserController {\n @Resource\n private UserService userService;\n @Resource\n private LogService logService;\n\n @RequestMapping("\/save")\n @Transactional\n public Object save(User user) {\n \/\/ \u63d2\u5165\u7528\u6237\u64cd\u4f5c\n userService.save(user);\n \/\/ \u63d2\u5165\u65e5\u5fd7\n logService.saveLog("\u7528\u6237\u63d2\u5165\uff1a" + user.getName());\n return true;\n }\n}<\/code><\/pre>\nUserService \u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
@Service\npublic class UserService {\n @Resource\n private UserMapper userMapper;\n\n @Transactional(propagation = Propagation.REQUIRED)\n public int save(User user) {\n return userMapper.save(user);\n }\n}<\/code><\/pre>\nLogService \u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
@Service\npublic class LogService {\n @Resource\n private LogMapper logMapper;\n\n @Transactional(propagation = Propagation.REQUIRED)\n public int saveLog(String content) {\n \/\/ \u51fa\u73b0\u5f02\u5e38\n int i = 10 \/ 0;\n return logMapper.saveLog(content);\n }\n}<\/code><\/pre>\n\u6267\u884c\u7ed3\u679c\uff1a\u7a0b\u5e8f\u62a5\u9519\uff0c\u4e24\u5f20\u8868\u4e2d\u90fd\u6ca1\u6709\u63d2\u5165\u4efb\u4f55\u6570\u636e\u3002<\/p>\n
\u6267\u884c\u6d41\u7a0b\u63cf\u8ff0\uff1a<\/p>\n
\n
- \n
- \u9996\u5148 UserService \u4e2d\u7684\u6dfb\u52a0\u7528\u6237\u65b9\u6cd5\u6b63\u5e38\u6267\u884c\u5b8c\u6210\u3002<\/li>\n
- LogService \u4fdd\u5b58\u65e5\u5fd7\u7a0b\u5e8f\u62a5\u9519\uff0c\u56e0\u4e3a\u4f7f\u7528\u7684\u662f UserController \u4e2d\u7684\u5168\u5c40\u4e8b\u52a1\uff0c\u6240\u4ee5\u6574\u4e2a\u4e8b\u52a1\u56de\u6eda\uff0c\u6b65\u9aa4 1 \u4e2d\u7684\u64cd\u4f5c\u4e5f\u8ddf\u7740\u56de\u6eda\u3002<\/li>\n
- \u6240\u4ee5\u6570\u636e\u5e93\u4e2d\u6ca1\u6709\u6dfb\u52a0\u4efb\u4f55\u6570\u636e\u3002<\/li>\n<\/ol>\n<\/blockquote>\n
REQUIRED_NEW \u4f7f\u7528\u6f14\u793a<\/h3>\n
REQUIRED_NEW \u4e0d\u652f\u6301\u5f53\u524d\u4e8b\u52a1\u3002
UserController \u5b9e\u73b0\u4ee3\u7801\uff1a<\/p>\n@RequestMapping("\/save")\n@Transactional\npublic Object save(User user) {\n \/\/ \u63d2\u5165\u7528\u6237\u64cd\u4f5c\n userService.save(user);\n \/\/ \u63d2\u5165\u65e5\u5fd7\n logService.saveLog("\u7528\u6237\u63d2\u5165\uff1a" + user.getName());\n return true;\n}<\/code><\/pre>\nUserService \u5b9e\u73b0\u4ee3\u7801\uff1a<\/p>\n
@Service\npublic class UserService {\n @Resource\n private UserMapper userMapper;\n\n @Transactional(propagation = Propagation.REQUIRES_NEW)\n public int save(User user) {\n System.out.println("\u6267\u884c save \u65b9\u6cd5.");\n return userMapper.save(user);\n }\n}<\/code><\/pre>\nLogService \u5b9e\u73b0\u4ee3\u7801\uff1a<\/p>\n
@Service\npublic class LogService {\n @Resource\n private LogMapper logMapper;\n\n @Transactional(propagation = Propagation.REQUIRES_NEW)\n public int saveLog(String content) {\n \/\/ \u51fa\u73b0\u5f02\u5e38\n int i = 10 \/ 0;\n return logMapper.saveLog(content);\n }\n}<\/code><\/pre>\n\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n
User \u8868\u4e2d\u6210\u529f\u6dfb\u52a0\u4e86\u4e00\u6761\u7528\u6237\u6570\u636e\uff0cLog \u8868\u6267\u884c\u5931\u8d25\uff0c\u6ca1\u6709\u52a0\u5165\u4efb\u4f55\u6570\u636e\uff0c\u4f46\u5b83\u5e76\u6ca1\u6709\u5f71\u54cd\u5230 UserController \u4e2d\u7684\u4e8b\u52a1\u6267\u884c\u3002<\/p><\/blockquote>\n
\u901a\u8fc7\u4ee5\u4e0a\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff1aLogService \u4e2d\u4f7f\u7528\u7684\u662f\u5355\u72ec\u7684\u4e8b\u52a1\uff0c\u867d\u7136 LogService \u4e2d\u7684\u4e8b\u52a1\u6267\u884c\u5931\u8d25\u4e86\uff0c\u4f46\u5e76\u6ca1\u6709\u5f71\u54cd UserController \u548c UserService \u4e2d\u7684\u4e8b\u52a1\u3002<\/p>\n
NESTED \u4f7f\u7528\u6f14\u793a<\/h3>\n
NESTED \u662f\u5d4c\u5957\u4e8b\u52a1\u3002
UserController \u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n@RequestMapping("\/save")\n@Transactional\npublic Object save(User user) {\n \/\/ \u63d2\u5165\u7528\u6237\u64cd\u4f5c\n userService.save(user);\n return true;\n}<\/code><\/pre>\nUserService \u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
@Transactional(propagation = Propagation.NESTED)\npublic int save(User user) {\n int result = userMapper.save(user);\n System.out.println("\u6267\u884c save \u65b9\u6cd5.");\n \/\/ \u63d2\u5165\u65e5\u5fd7\n logService.saveLog("\u7528\u6237\u63d2\u5165\uff1a" + user.getName());\n return result;\n}<\/code><\/pre>\nLogService \u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
@Transactional(propagation = Propagation.NESTED)\npublic int saveLog(String content) {\n \/\/ \u51fa\u73b0\u5f02\u5e38\n int i = 10 \/ 0;\n return logMapper.saveLog(content);\n}<\/code><\/pre>\n\u6700\u7ec8\u6267\u884c\u7ed3\u679c\uff0c\u7528\u6237\u8868\u548c\u65e5\u5fd7\u8868\u90fd\u6ca1\u6709\u6dfb\u52a0\u4efb\u4f55\u6570\u636e\u3002<\/p>\n
\u6267\u884c\u6d41\u7a0b\u63cf\u8ff0\uff1a<\/p>\n
\n
- \n
- UserController \u4e2d\u8c03\u7528\u4e86 UserService \u7684\u6dfb\u52a0\u7528\u6237\u65b9\u6cd5\uff0cUserService \u4f7f\u7528 NESTED \u5faa\u73af\u5d4c\u5957\u4e8b\u52a1\uff0c\u5e76\u6210\u529f\u6267\u884c\u4e86\u6dfb\u52a0\u7528\u6237\u7684\u65b9\u6cd5\u3002<\/li>\n
- UserService \u4e2d\u8c03\u7528\u4e86 LogService \u7684\u6dfb\u52a0\u65b9\u6cd5\uff0cLogService \u4f7f\u7528\u4e86 NESTED \u5faa\u73af\u5d4c\u5957\u4e8b\u52a1\uff0c\u4f46\u5728\u65b9\u6cd5\u6267\u884c\u4e2d\u51fa\u73b0\u7684\u5f02\u5e38\uff0c\u56e0\u6b64\u56de\u6eda\u4e86\u5f53\u524d\u4e8b\u52a1\u3002<\/li>\n
- \u56e0\u4e3a UserService \u4f7f\u7528\u7684\u662f\u5d4c\u5957\u4e8b\u52a1\uff0c\u6240\u4ee5\u53d1\u751f\u56de\u6eda\u7684\u4e8b\u52a1\u662f\u5168\u5c40\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4 UserService \u4e2d\u7684\u6dfb\u52a0\u7528\u6237\u65b9\u6cd5\u4e5f\u88ab\u56de\u6eda\u4e86\uff0c\u6700\u7ec8\u6267\u884c\u7ed3\u679c\u662f\u7528\u6237\u8868\u548c\u65e5\u5fd7\u8868\u90fd\u6ca1\u6709\u6dfb\u52a0\u4efb\u4f55\u6570\u636e\u3002<\/li>\n<\/ol>\n<\/blockquote>\n
\u603b\u7ed3<\/h2>\n
Spring \u4e8b\u52a1\u4f20\u64ad\u673a\u5236\u662f\u5305\u542b\u591a\u4e2a\u4e8b\u52a1\u7684\u65b9\u6cd5\u5728\u76f8\u4e92\u8c03\u7528\u65f6\uff0c\u4e8b\u52a1\u662f\u5982\u4f55\u5728\u8fd9\u4e9b\u65b9\u6cd5\u95f4\u4f20\u64ad\u7684\u3002\u4e8b\u52a1\u7684\u4f20\u64ad\u7ea7\u522b\u6709 7 \u4e2a\uff0c\u652f\u6301\u5f53\u524d\u4e8b\u52a1\u7684\uff1aREQUIRED\u3001SUPPORTS\u3001MANDATORY\uff1b\u4e0d\u652f\u6301\u5f53\u524d\u4e8b\u52a1\u7684\uff1aREQUIRES_NEW\u3001NOT_SUPPORTED\u3001NEVER\uff0c\u4ee5\u53ca\u5d4c\u5957\u4e8b\u52a1 NESTED\uff0c\u5176\u4e2d REQUIRED \u662f\u9ed8\u8ba4\u7684\u4e8b\u52a1\u4f20\u64ad\u7ea7\u522b\u3002<\/p>\n
\n
\u662f\u975e\u5ba1\u4e4b\u4e8e\u5df1\uff0c\u6bc1\u8a89\u542c\u4e4b\u4e8e\u4eba\uff0c\u5f97\u5931\u5b89\u4e4b\u4e8e\u6570\u3002<\/p>\n
\u516c\u4f17\u53f7\uff1aJava\u9762\u8bd5\u771f\u9898\u89e3\u6790<\/p>\n
\u9762\u8bd5\u5408\u96c6\uff1ahttps:\/\/gitee.com\/mydb\/interview<\/a><\/p>\n<\/blockquote>\n