Java宠物商店项目案例解析与实践指南

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资源摘要信息:"本案例详细介绍了如何使用Java面向对象编程技术开发一个宠物商店的应用程序。整个应用程序分为五个核心部分,分别对应宠物商店的不同业务场景,涵盖了从系统启动到宠物买卖的完整流程。在开发过程中,涉及到了面向对象编程的多个关键概念,如类、对象、继承、封装、多态等。本案例不仅是一个编程练习,也是一个理解面向对象设计思想的实际应用。 在第一部分“系统启动”中,通常需要初始化应用程序所需的基本环境,加载配置信息,创建基础对象和资源。这可能是宠物商店系统中最基础的部分,涉及到单例模式的应用,确保系统有一个且只有一个入口点和系统实例。 第二部分“宠物主人登录”,这个功能模块涉及到用户身份验证,需要设计用户类,包括用户名和密码等属性,并实现登录验证逻辑。登录过程可能需要使用到会话管理技术,确保用户登录状态的持续性。 第三部分“宠物主要购买库存宠物”是宠物商店的核心交易环节之一。在这个模块中,宠物商店系统需要展示可购买的宠物列表,并允许用户进行选择和购买。这涉及到商品类的设计,以及购物车功能的实现,同时也需要用到集合类来管理宠物库存。 第四部分“宠物主人购买新培育宠物”,需要为宠物商店添加新宠物的培育和销售流程。这不仅需要创建宠物培育相关的类,还可能需要实现更复杂的业务逻辑,比如宠物培育的时间进度跟踪,或者新宠物培育结果的随机性处理。 最后一部分“宠物主人卖出宠物给商店”,这部分功能可能需要设计宠物评估类,用于评估宠物的状态和价值,以便商店决定是否购买。此模块可能涉及到策略模式的应用,以便根据不同的评估参数灵活地选择不同的评估策略。 整个宠物商店项目案例的开发过程,是对Java面向对象编程知识的一次全面实践。开发者可以在实践中加深对面向对象设计原则的理解,提高解决实际问题的能力。此外,案例还能够帮助开发者学会如何将复杂业务逻辑抽象为可管理的模块化代码,从而提升软件开发的效率和质量。"

Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `com.sitech.prom.channelsettle.rehearsal.busi.compute.vo.ListResponseVo` out of START_ARRAY token at [Source: (PushbackInputStream); line: 1, column: 1] at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1464) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1238) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1190) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeFromArray(BeanDeserializer.java:604) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther(BeanDeserializer.java:190) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:166) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4482) ~[jackson-databind-2.11.0.jar:2.11.0] at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3487) ~[jackson-databind-2.11.0.jar:2.11.0] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:239) ~[spring-web-5.2.6.RELEASE.jar:5.2.6.RELEASE] ... 21 common frames omitted

2023-06-06 上传

Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@18e8e27b] 2023-07-22 09:35:58.167 ERROR 44888 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.ClassCastException: com.sc_core.hardware.entity.Bracelet cannot be cast to com.sc_core.hardware.entity.BraceletMessage] with root cause java.lang.ClassCastException: com.sc_core.hardware.entity.Bracelet cannot be cast to com.sc_core.hardware.entity.BraceletMessage at com.sc_core.hardware.service.Impl.BraceletServiceImpl.BraceletOnlineCount(BraceletServiceImpl.java:46) ~[classes/:na] at com.sc_core.hardware.controller.BraceletController.BraceletOnlineCount(BraceletController.java:37) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) ~[tomcat-embed-core-9.0.46.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.15.RELEASE.jar:5.2.15.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.46.jar:4.0.FR]

2023-07-23 上传

org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Unexpected end-of-input within/between Object entries; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected end-of-input within/between Object entries at [Source: (org.springframework.util.StreamUtils$NonClosingInputStream); line: 7, column: 17] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:391) ~[spring-web-5.3.20.jar:5.3.20] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:343) ~[spring-web-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:185) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:160) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:133) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:122) ~[spring-web-5.3.20.jar:5.3.20] at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:179) ~[spring-web-5.3.20.jar:5.3.20] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:146) ~[spring-web-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) [spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) [spring-webmvc-5.3.20.jar:5.3.20] 这个错误啥意思?

2023-07-22 上传