MyBatis 面试题及答案：从基础到进阶，助你轻松应对

"1. MyBatis\u662f\u4ec0\u4e48\uff1f\u5b83\u7684\u4f18\u70b9\u662f\u4ec0\u4e48\uff1f\n\tMyBatis\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u6210\u652f\u5c42\u6846\u67b6\uff0c\u5b83\u901a\u8fc7\uXML\u6216\u6ce8\u91ca\u914d\u7f6e\uSQL\u8bed\u53e5\uff0c\u5c06\u52a0\u5927\u7c7b\u5bf9\u8c61\u548c\u6570\u636e\u5e93\u8868\u8fdb\u884c\u5f71\u51b2\uff0c\u7b80\u5316\u4e86\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u5199\u7f16\u8fc7\u7a0b\u3002\u5b83\u7684\u4f18\u70b9\u6709\uff1a\n\t- \u7b80\u5316\u4e86\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u5199\u7f16\u8fc7\u7a0b\uff0c\u901a\u8fc7\uXML\u6216\u6ce8\u91ca\u914d\u7f6e\uSQL\u8bed\u53e5\uff0c\u51cf\u5c11\u4e86\u7f16\u7801\u91cf\u3002\n\t- \u63d0\u4f9b\u4e86\u7075\u6d3b\u7684\u5f71\u51b2\u65b9\u5f0f\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u7075\u6d3b\u5730\u5f71\u51b2\u52a0\u5927\u7c7b\u5bf9\u8c61\u548c\u6570\u636e\u5e93\u8868\u3002\n\t- \u652f\u6301\u52a8\u6001\uSQL\uff0c\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\u62fc\u63a5\uSQL\u8bed\u53e5\uff0c\u63d0\u9ad8\u4e86\u67e5\u8be2\u7684\u7075\u6d3b\u6027\u3002\n\t- \u63d0\u4f9b\u4e86\u7f13\u5b58\u673a\u5236\uff0c\u53ef\u4ee5\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\uff0c\u63d0\u9ad8\u4e86\u6570\u636e\u5e93\u67e5\u8be2\u7684\u6027\u80fd\u3002\n\n2. MyBatis\u7684\u5de5\u4f5c\u539f\u7406\u662f\u4ec0\u4e48\uff1f\n\tMyBatis\u7684\u5de5\u4f5c\u539f\u7406\u53ef\u4ee5\u5206\u4e3a\u4e09\u4e2a\u6b65\u9aa4\uff1a\n\t- \u914d\u7f6e\u9636\u6bb5\uff1a\u901a\u8fc7\uXML\u6216\u6ce8\u91ca\u914d\u7f6e\uSQL\u8bed\u53e5\u548c\u5f71\u51b2\u5173\u7cfb\u3002\n\t- \u8fd0\u884c\u9636\u6bb5\uff1a\u901a\u8fc7\uSqlSessionFactory\u521b\u5efa\uSqlSession\uff0c\uSqlSession\u662f\uMyBatis\u7684\u6838\u5fc3\u63a5\u53e3\uff0c\u7528\u4e8e\u6267\u884c\uSQL\u8bed\u53e5\u548c\u7ba1\u7406\u4ea4\u6613\u3002\n\t- \u6267\u884c\u9636\u6bb5\uff1a\u901a\u8fc7\uSqlSession\u8c03\u7528\u76f8\u5e94\u7684\u65b9\u6cd5\u6267\u884c\uSQL\u8bed\u53e5\uff0c\u5c06\u7ed3\u679c\u5f71\u51b2\u4e3a\u52a0\u5927\u7c7b\u5bf9\u8c61\u5e76\u8fd4\u56de\u3002\n\n3. MyBatis\u7684\u52a8\u6001\uSQL\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u4f7f\u7528\u52a8\u6001\uSQL\uff1f\n\t\u52a8\u6001\uSQL\u6307\u7684\u662f\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\u62fc\u63a5\uSQL\u8bed\u53e5\u7684\u6280\u672f\u3002\uMyBatis\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u51e0\u79cd\u52a8\u6001\uSQL\u6807\u7b7e\uff1a\n\t- if\uff1a\u7528\u4e8e\u6761\u4ef6\u5224\u65ad\uff0c\u6839\u636e\u6761\u4ef6\u52a8\u6001\u62fc\u63a5\uSQL\u8bed\u53e5\u3002\n\t- choose\u3001\uwhen\u3001\uotherwise\uff1a\u7528\u4e8e\u6761\u4ef6\u9009\u62e9\uff0c\u6839\u636e\u6761\u4ef6\u9009\u62e9\u4e0d\u540c\u7684\uSQL\u8bed\u53e5\u3002\n\t- foreach\uff1a\u7528\u4e8e\u5faa\u73af\u8f93\u51fa\u96c6\u5408\uff0c\u6839\u636e\u96c6\u5408\u7684\u5143\u7d20\u52a8\u6001\u62fc\u63a5\uSQL\u8bed\u53e5\u3002\n\t- trim\u3001\uwhere\u3001\uset\uff1a\u7528\u4e8e\u53bb\u9664\u591a\u4f59\u7684\uSQL\u8bed\u53e5\u90e8\u5206\uff0c\u6839\u636e\u9700\u8981\u52a8\u6001\u62fc\u63a5\uSQL\u8bed\u53e5\u3002\n\n4. MyBatis\u7684\u4e00\u7ea7\u7f13\u5b58\u548c\u4e8c\u7ea7\u7f13\u5b58\u662f\u4ec0\u4e48\uff1f\u5b83\u4eec\u6709\u4ec0\u4e48\u5dee\u522b\uff1f\n\t- \u4e00\u7ea7\u7f13\u5b58\uff1a\u6307\u7684\u662f\uSqlSession\u7ea7\u522b\u7684\u7f13\u5b58\uff0c\u540c\u4e00\uSqlSession\u4e2d\u76f8\u540c\u7684\uSQL\u8bed\u53e5\u548c\u53c2\u6570\u4f1a\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u7684\u6027\u80fd\u3002\u4e00\u7ea7\u7f13\u5b58\u9ed8\u8ba4\u662f\u5f00\u542f\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\uSqlSession\u7684\u516c\u5171\u65b9\u6cd5\u6e05\u7a7a\u7f13\u5b58\u3002\n\t- \u4e8c\u7ea7\u7f13\u5b58\uff1a\u6307\u7684\u662f\uMapper\u7ea7\u522b\u7684\u7f13\u5b58\uff0c\u591a\u4e2a\uSqlSession\u5171\u4eab\u540c\u4e00\u7684\uMapper\u63a5\u53e3\uff0c\u76f8\u540c\u7684\uSQL\u8bed\u53e5\u548c\u53c2\u6570\u4f1a\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u7684\u6027\u80fd\u3002\u4e8c\u7ea7\u7f13\u5b58\u9ed8\u8ba4\u662f\u5173\u95ed\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\uMapper\u63a5\u53e3\u4e0a\u6dfb\u52a0\u4e00\u7ea7\u7f13\u5b58\u6ce8\u91ca\u5f00\u542f\u4e8c\u7ea7\u7f13\u5b58\u3002\n\n5. MyBatis\u7684\u63d2\u4ef6\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u4f7f\u7528\u63d2\u4ef6\uff1f\n\t\u63d2\u4ef6\u662f\uMyBatis\u63d0\u4f9b\u7684\u6269\u5c55\u673a\u5236\uff0c\u53ef\u4ee5\u5728\uSQL\u6267\u884c\u8fc7\u7a0b\u4e2d\u52a8\u6001\u6295\u6361\uSQL\u8bed\u53e5\u5e76\u8fdb\u884c\u5904\u7406\u3002\u63d2\u4ef6\u9700\u8981\u5b9e\u73b0\uInterceptor\u63a5\u53e3\uff0c\u5e76\u901a\u8fc7\u4e00\u7ea7\u7f13\u5b58\u6ce8\u91ca\u6307\u5b9a\u8981\u6295\u6361\u7684\u65b9\u6cd5\u548c\u7c7b\u578b\u3002\u4f7f\u7528\u63d2\u4ef6\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\n\t- \u5b9e\u73b0\uInterceptor\u63a5\u53e3\u5e76\u5b9e\u73b0\uintercept\u65b9\u6cd5\uff0c\u5199\u51fa\u63d2\u4ef6\u7684\u903b\u8f91\u5904\u7406\u3002\n\t- \u5728\u63d2\u4ef6\u7c7b\u4e0a\u6dfb\u52a0\u4e00\u7ea7\u7f13\u5b58\u6ce8\u91ca\uff0c\u6307\u5b9a\u8981\u6295\u6361\u7684\u65b9\u6cd5\u548c\u7c7b\u578b\u3002\n\t- \u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u914d\u7f6e\u63d2\u4ef6\uff0c\u5c06\u63d2\u4ef6\u6dfb\u52a0\u5230\uMyBatis\u7684\u914d\u7f6e\u4e2d\u3002\n\n\u8fd9\u91cc\u53ea\u63d0\u51fa\u4e86\u4e00\u4e9b\u5e38\u89c1\u7684\u9762\u8bd5\u9898\u53ca\u7b54\u6848\uff0c\u5177\u4f53\u7684\u95ee\u9898\u8fd8\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u6269\u5c55\u3002