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Java项目开发案例:水电费管理系统源码解析

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3KB | 更新于2025-08-09 | 139 浏览量 | 0 下载量 举报 收藏
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标题中提到的"Converter.java"表明这是一个与转换相关的Java源代码文件。在Java项目开发中,创建用于数据或单位转换的类是常见的需求,尤其是当涉及到复杂的业务逻辑,如水电费管理系统时。这个文件可能包含了用于将一种形式的数据(比如重量、金额、水电使用量等)转换为另一种形式的代码。 描述部分提供了这个Java源码项目的具体应用场景,即水电费管理系统。在这个系统中,当卡车到达一个测量平台时,系统可以通过某种方法(可能是通过传感器等硬件接口获取数据)测量卡车装载的货物重量。接下来,系统可能会利用"Converter.java"中实现的转换逻辑,将重量数据转换为相关费用的计算依据,例如,根据货物重量计算其运输费用。此系统不仅限于此功能,它还可以涉及到更广泛的水电费管理,包括计量、计费、账单生成等功能。 标签"java项目开发源码"和"java水电费管理系统源码"进一步强调了该文件是与Java开发相关的源代码,并且是用于水电费管理系统的。这可能意味着这个源码文件是该系统中处理逻辑的一部分,而整个系统可能包含了多个模块和组件,例如用户界面、数据库连接、业务逻辑层等。此外,"欢迎一起交流学习"表明这是一个开放的资源,供有兴趣的Java开发者学习和交流。 "压缩包子文件的文件名称列表"中仅提供了一个文件名"Converter.java"。在实际的开发工作中,一个项目往往包含多个文件和包。这个文件可能属于一个具体的包内,比如一个名为"com.electricity.management"的包。它可能是该包下的一系列与数据转换相关的类之一,用于处理水电费管理系统的特定逻辑。 基于以上信息,我们可以提炼出以下知识点: 1. Java基础: Converter.java文件肯定是用Java语言编写的。Java是一种广泛使用的面向对象编程语言,适用于多种应用,包括企业级应用、移动应用和Web应用。Java的基础知识包括数据类型、运算符、控制流、类和对象、继承、接口、包等概念。 2. 文件和包的结构:Java源代码文件通常以".java"为后缀,存放在文件系统中。Java的包(package)概念用于组织相关的类和接口。一个包可以包含多个类文件,它有助于避免命名冲突,提供访问控制,并且可以将类组织成层次结构。 3. 水电费管理系统业务逻辑:这类系统通常包括客户信息管理、计费规则设定、账单生成和通知等模块。 Converter.java可能包含用于计算费用的业务逻辑部分,例如,将水电使用量等数值转换为费用。 4. 数据转换:在系统中,经常需要处理不同单位之间的转换,如将吨转换为千克,或者将千瓦时转换为费率单位。 Converter.java很可能包含用于这些转换的函数或方法。 5. 重用性和模块化:在软件工程中,模块化和重用性是关键概念。 Converter.java可能被设计为一个可重用的组件,可以在整个系统中被多次调用,以执行其转换功能。 6. 编码实践:虽然具体代码未提供,但可以推测 Converter.java 被设计为清晰、高效并且易于维护的代码。编码实践包括代码注释、遵循命名约定、实现设计模式和代码的结构化等。 7. Java项目结构:通常Java项目会遵循一定的目录结构,比如Maven或Gradle项目会有"src/main/java"和"src/main/resources"等目录。 Converter.java应该位于"src/main/java"目录下的适当包路径下。 8. Java开源项目:在Java社区中,开源项目非常普遍,它们允许开发者贡献代码、分享知识和进行协作。 Converter.java文件可能是这样一个开源项目的一部分,社区成员可以对其进行研究、贡献或修改。 以上是根据标题、描述、标签以及文件名称列表提供的信息所能推断出的主要知识点。如果想进一步学习和了解Converter.java的功能和实现,可以下载整个项目源码进行分析和实践。

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!SESSION 2025-05-26 20:01:51.887 ----------------------------------------------- eclipse.buildId=4.29.0.20230907-1200 java.version=17.0.8.1 java.vendor=Eclipse Adoptium BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=zh_CN Framework arguments: -product org.eclipse.epp.package.java.product Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.java.product !ENTRY ch.qos.logback.classic 1 0 2025-05-26 20:02:04.760 !MESSAGE Activated before the state location was initialized. Retry after the state location is initialized. !ENTRY org.eclipse.osgi 4 0 2025-05-26 20:02:07.219 !MESSAGE Application error !STACK 1 java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: no swt-pi4-gtk-4962r3 in java.library.path: /usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib no swt-pi4-gtk in java.library.path: /usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib no swt-pi4 in java.library.path: /usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib Can't load library: /root/.swt/lib/linux/x86_64/libswt-pi4-gtk-4962r3.so Can't load library: /root/.swt/lib/linux/x86_64/libswt-pi4-gtk.so Can't load library: /root/.swt/lib/linux/x86_64/libswt-pi4.so at org.eclipse.swt.internal.Library.loadLibrary(Library.java:346) at org.eclipse.swt.internal.Library.loadLibrary(Library.java:255) at org.eclipse.swt.internal.gtk.OS.<clinit>(OS.java:97) at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:209) at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:155) at org.eclipse.swt.widgets.Display.<clinit>(Display.java:169) at org.eclipse.ui.internal.Workbench.createDisplay(Workbench.java:727) at org.eclipse.ui.PlatformUI.createDisplay(PlatformUI.java:183) at org.eclipse.ui.internal.ide.application.IDEApplication.createDisplay(IDEApplication.java:182) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:125) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588) at org.eclipse.equinox.launcher.Main.run(Main.java:1459) at org.eclipse.equinox.launcher.Main.main(Main.java:1432)

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org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'modelConverterRegistrar' defined in class path resource [org/springdoc/core/configuration/SpringDocConfiguration.class]: Failed to instantiate [org.springdoc.core.converters.ModelConverterRegistrar]: Factory method 'modelConverterRegistrar' threw exception with message: io/swagger/v3/oas/models/media/Schema$SchemaResolution at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:648) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:636) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1335) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1165) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:962) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) at com.skycrane.saas.website.app.WebsiteAppApplication.main(WebsiteAppApplication.java:31) Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springdoc.core.converters.ModelConverterRegistrar]: Factory method 'modelConverterRegistrar' threw exception with message: io/swagger/v3/oas/models/media/Schema$SchemaResolution at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:177) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:644) ... 19 common frames omitted Caused by: java.lang.NoClassDefFoundError: io/swagger/v3/oas/models/media/Schema$SchemaResolution at io.swagger.v3.core.jackson.ModelResolver.<init>(ModelResolver.java:136) at io.swagger.v3.core.converter.ModelConverters.<init>(ModelConverters.java:42) at io.swagger.v3.core.converter.ModelConverters.getInstance(ModelConverters.java:78) at org.springdoc.core.converters.ModelConverterRegistrar.<init>(ModelConverterRegistrar.java:61) at org.springdoc.core.configuration.SpringDocConfiguration.modelConverterRegistrar(SpringDocConfiguration.java:302) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:140) ... 20 common frames omitted Caused by: java.lang.ClassNotFoundException: io.swagger.v3.oas.models.media.Schema$SchemaResolution at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525) ... 30 common frames omitted

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分析异常org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public com.asiadb.common.core.domain.AjaxResult com.asiadb.web.controller.vcc.vccManage.vccCardInfo.VccCardInfoController.auditSuccess(com.asiadb.vcc.vccManage.vccCardInfo.domain.VccCardInfo) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:163) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:133) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:179) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:146) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)

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Caused by: com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.alibaba.fastjson.JSONObject["file"]->org.springframework.core.io.ByteArrayResource["inputStream"]) at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:284) at com.fasterxml.jackson.databind.SerializerProvider.mappingException(SerializerProvider.java:1110) at com.fasterxml.jackson.databind.SerializerProvider.reportMappingProblem(SerializerProvider.java:1135) at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:69) at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:32) at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:704) at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689) at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.java:633) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:536) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:30) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:292) at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2509) at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.writeInternal(MappingJackson2HttpMessageConverter.java:141)

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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?

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postman接口调用idea,idea控制台报错org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'text/plain;charset=UTF-8' not supported at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:225) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:158) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:131) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:170) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:807) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1061) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)