\u300aJava\u7f16\u7a0b\u8bb2\u4e49\u300b\u4e2d\u7684\u914d\u5957\u5b9e\u6218\u6848\u4f8b\u4e0eIDE\u6280\u5de7\uff082025\u5e74\u66f4\u65b0\u7248\uff09\u805a\u7126\u4e8e\u63d0\u5347\u5b9e\u9645\u5f00\u53d1\u80fd\u529b\u4e0e\u5de5\u5177\u6548\u7387\uff0c\u4ee5\u4e0b\u4e3a\u5173\u952e\u5185\u5bb9\u6574\u7406\uff1a<\/p>\n
\ud83d\udd27 \u4e00\u3001\u5b9e\u6218\u6848\u4f8b\u7cbe\u9009
\u200c\u9762\u5411\u5bf9\u8c61\u5efa\u6a21\u6848\u4f8b\u200c<\/p>\n
\u200c\u7535\u5546\u8ba2\u5355\u7cfb\u7edf\u200c\uff1a\u5b9e\u73b0\u8ba2\u5355\u72b6\u6001\u673a\u3001\u652f\u4ed8\u6d41\u6c34\u7ba1\u7406\u4e0e\u5e93\u5b58\u8054\u52a8
java
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enum OrderStatus { PENDING, PAID, SHIPPED } \/\/ \u72b6\u6001\u673a\u8bbe\u8ba1
class OrderService {<\/p>\n
public void processPayment(Order order) { ... } \/\/ \u72b6\u6001\u8f6c\u6362\u903b\u8f91<\/code><\/pre>\n}:ml-citation{ref=”4,9″ data=”citationList”}
\u200c\u591a\u7ebf\u7a0b\u5e76\u53d1\u5b9e\u6218\u200c<\/p>\n
\u200c\u94f6\u884c\u8f6c\u8d26\u9632\u6b7b\u9501\u7cfb\u7edf\u200c\uff1a
\u4f7f\u7528ReentrantLock\u5b9e\u73b0\u8d26\u6237\u9501\u7c92\u5ea6\u63a7\u5236
\u7ebf\u7a0b\u6c60\u7ba1\u7406\u8d44\u91d1\u6e05\u7b97\u4efb\u52a1
\u200c\u7269\u8054\u7f51\u5e94\u7528\u5f00\u53d1\u200c<\/p>\n
\u200c\u667a\u80fd\u6e29\u63a7\u7cfb\u7edf\u200c\uff1a
MQTT\u534f\u8bae\u63a5\u5165\u4f20\u611f\u5668\u6570\u636e
Spring Boot\u5b9e\u65f6\u8ba1\u7b97\u6e29\u5ea6\u9608\u503c\u544a\u8b66
\ud83d\udee0 \u4e8c\u3001IntelliJ IDEA\u9ad8\u6548\u6280\u5de7
\u200c\u573a\u666f\u200c \u200c\u6280\u5de7\u200c \u200c\u6548\u679c\u200c
\u200c\u4ee3\u7801\u8d28\u91cf\u200c Alt+Enter\u81ea\u52a8\u4fee\u590d\uff08\u5982\u672a\u4f7f\u7528\u53d8\u91cf\u3001\u5f02\u5e38\u5904\u7406\uff09 \u51cf\u5c11\u4f4e\u7ea7\u9519\u8bef
\u200c\u8c03\u8bd5\u8fdb\u9636\u200c \u6761\u4ef6\u65ad\u70b9 + \u591a\u7ebf\u7a0b\u8ffd\u8e2a\u5668 \u7cbe\u51c6\u5b9a\u4f4d\u5e76\u53d1\u95ee\u9898
\u200c\u91cd\u6784\u5b89\u5168\u200c Ctrl+T\u91cd\u547d\u540d\u7c7b\/\u65b9\u6cd5\uff08\u81ea\u52a8\u66f4\u65b0\u5f15\u7528\u70b9\uff09 \u907f\u514d\u624b\u52a8\u4fee\u6539\u9057\u6f0f
\u200c\u70ed\u90e8\u7f72\u914d\u7f6e\u200c\uff08Spring Boot\u9879\u76ee\uff09\uff1a<\/p>\n
text
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\n- \u6dfb\u52a0spring-boot-devtools\u4f9d\u8d56<\/li>\n
- IDEA\u4e2d\u5f00\u542f: [Build] \u2192 [Compiler] \u2192 [Build project automatically]<\/li>\n
- Ctrl+Shift+A \u2192 \u641c\u7d22Registry \u2192 \u542f\u7528compiler.automake.allow.when.app.running:ml-citation{ref=”12″ data=”citationList”}
\ud83e\udde9 \u4e09\u3001\u5de5\u4e1a\u7ea7\u5f00\u53d1\u89c4\u8303
\u200c\u65e5\u5fd7\u4f18\u5316\u200c<\/li>\n<\/ol>\n\u200c\u53c2\u6570\u5316\u65e5\u5fd7\u200c vs \u5b57\u7b26\u4e32\u62fc\u63a5\uff1a
\u53cd\u4f8b\uff1alogger.debug(“\u7528\u6237ID:” + userId + ” \u64cd\u4f5c:” + action); \/\/ \u5185\u5b58\u6d6a\u8d39
\u6b63\u89e3\uff1alogger.debug(“\u7528\u6237ID:{} \u64cd\u4f5c:{}”, userId, action);
\u200c\u5f02\u5e38\u5904\u7406\u94c1\u5f8b\u200c<\/p>\n
\u7981\u6b62\u6355\u83b7Exception\u540e\u7a7a\u5904\u7406\uff08e.printStackTrace()\u4ec5\u9650\u8c03\u8bd5\uff09
\u81ea\u5b9a\u4e49\u4e1a\u52a1\u5f02\u5e38\u4f53\u7cfb\uff1a
java
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class PaymentException extends RuntimeException { \/\/ \u660e\u786e\u5f02\u5e38\u8bed\u4e49<\/p>\n
PaymentException(String msg) { super(msg); }<\/code><\/pre>\n}:ml-citation{ref=”1,9″ data=”citationList”}
\ud83d\udca1 \u56db\u3001\u914d\u5957\u5de5\u5177\u94fe\u5b9e\u6218
\u200c\u6570\u636e\u5e93\u96c6\u6210\u200c<\/p>\n
IDEA\u8fde\u63a5\u6570\u636e\u5e93\uff1a
Database\u5de5\u5177\u76f4\u63a5\u6267\u884cSQL\u811a\u672c
\u7ed3\u679c\u96c6\u62d6\u62fd\u751f\u6210POJO\u7c7b
MyBatis\u63d2\u4ef6\uff1aXML\u6620\u5c04\u6587\u4ef6\u4e0e\u63a5\u53e3\u65b9\u6cd5\u8df3\u8f6c
\u200c\u6d4b\u8bd5\u9a71\u52a8\u5f00\u53d1\u200c<\/p>\n
JUnit 5\u53c2\u6570\u5316\u6d4b\u8bd5\uff1a
java
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@ParameterizedTest
@ValueSource(ints = {100, 200, 500})
void testPayment(int amount) { … } \/\/ \u591a\u91d1\u989d\u7528\u4f8b\u8986\u76d6:ml-citation{ref=”9,14″ data=”citationList”}
\u200c\u907f\u5751\u6307\u5357\u200c\uff1a<\/p>\n
\u907f\u514dparallelStream()\u5728\u4e0d\u5b89\u5168\u96c6\u5408\uff08\u5982ArrayList\uff09\u4e0a\u76f4\u63a5\u64cd\u4f5c \u2192 \u6539\u7528Collections.synchronizedList()
\u4e8b\u52a1\u65b9\u6cd5\u5185\u614e\u7528try-catch \u2192 Spring\u58f0\u660e\u5f0f\u4e8b\u52a1\u9700\u5f02\u5e38\u56de\u6eda\u65f6\u629b\u51faRuntimeException
\u4e66\u4e2d\u6848\u4f8b\u8986\u76d6\u91d1\u878d\u3001\u7535\u5546\u3001IoT\u7b49\u4e3b\u6d41\u573a\u666f\uff0c\u914d\u5957\u8d44\u6e90\u542b\u5b8c\u6574\u6e90\u7801\u4e0e\u89c6\u9891\u6f14\u793a\uff08\u8be6\u89c1\u5b98\u7f51\uff09\u3002<\/p>\n