Java web 后端错误
页面上无法显示数据库内容，但在页面上添加信息，可以传到数据库。
马上答辩了，哭
```java
:: Spring Boot :: (v2.1.2.RELEASE)
2022-12-23 12:22:37.806 INFO 12432 --- [ main] com.etoak.PetApp : Starting PetApp on LAPTOP-BKK082NC with PID 12432 (started by xiwang in E:\源码\boot_pet)
2022-12-23 12:22:37.807 INFO 12432 --- [ main] com.etoak.PetApp : No active profile set, falling back to default profiles: default
2022-12-23 12:22:38.139 INFO 12432 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2022-12-23 12:22:38.140 INFO 12432 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2022-12-23 12:22:38.156 INFO 12432 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 8ms. Found 0 repository interfaces.
2022-12-23 12:22:38.343 INFO 12432 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$863c32ae] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2022-12-23 12:22:38.510 INFO 12432 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 9000 (http)
2022-12-23 12:22:38.524 INFO 12432 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2022-12-23 12:22:38.524 INFO 12432 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.14]
2022-12-23 12:22:38.529 INFO 12432 --- [ main] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jdk-19\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Java\jdk-19\bin;E:\数据结构与算法\;c:\Program Files\MySQL\MySQL Server 8.0\bin;C:\Users\xiwang\AppData\Local\Microsoft\WindowsApps;C:\Users\xiwang\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\xiwang\AppData\Roaming\npm;.]
2022-12-23 12:22:38.584 INFO 12432 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/pet] : Initializing Spring embedded WebApplicationContext
2022-12-23 12:22:38.584 INFO 12432 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 753 ms
2022-12-23 12:22:38.935 INFO 12432 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2022-12-23 12:22:39.252 INFO 12432 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 9000 (http) with context path '/pet'
2022-12-23 12:22:39.253 INFO 12432 --- [ main] com.etoak.PetApp : Started PetApp in 1.643 seconds (JVM running for 2.033)
2022-12-23 12:22:54.020 INFO 12432 --- [nio-9000-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/pet] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2022-12-23 12:22:54.020 INFO 12432 --- [nio-9000-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2022-12-23 12:22:54.025 INFO 12432 --- [nio-9000-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 5 ms
2022-12-23 12:22:54.100 INFO 12432 --- [nio-9000-exec-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2022-12-23 12:22:54.391 INFO 12432 --- [nio-9000-exec-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2022-12-23 12:27:46.979 ERROR 12432 --- [nio-9000-exec-7] o.a.c.c.C.[.[.[.[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [/pet] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'name!=null and name!=''. Cause: org.apache.ibatis.ognl.ExpressionSyntaxException: Malformed OGNL expression: name!=null and name!=' [org.apache.ibatis.ognl.TokenMgrError: Lexical error at line 1, column 23. Encountered: <EOF> after : ""]] with root cause
org.apache.ibatis.ognl.TokenMgrError: Lexical error at line 1, column 23. Encountered: <EOF> after : ""
at org.apache.ibatis.ognl.OgnlParserTokenManager.getNextToken(OgnlParserTokenManager.java:1539) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.jj_ntk(OgnlParser.java:3099) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.unaryExpression(OgnlParser.java:1079) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.multiplicativeExpression(OgnlParser.java:971) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.additiveExpression(OgnlParser.java:894) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.shiftExpression(OgnlParser.java:750) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.relationalExpression(OgnlParser.java:508) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.equalityExpression(OgnlParser.java:477) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.andExpression(OgnlParser.java:352) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.exclusiveOrExpression(OgnlParser.java:299) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.inclusiveOrExpression(OgnlParser.java:246) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.logicalAndExpression(OgnlParser.java:221) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.logicalOrExpression(OgnlParser.java:140) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.conditionalTestExpression(OgnlParser.java:101) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.assignmentExpression(OgnlParser.java:64) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.expression(OgnlParser.java:23) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.OgnlParser.topLevelExpression(OgnlParser.java:15) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.ognl.Ognl.parseExpression(Ognl.java:110) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.OgnlCache.parseExpression(OgnlCache.java:55) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:46) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateBoolean(ExpressionEvaluator.java:32) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.IfSqlNode.apply(IfSqlNode.java:34) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.lambda$apply$0(MixedSqlNode.java:32) ~[mybatis-3.5.2.jar:3.5.2]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na]
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:32) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.TrimSqlNode.apply(TrimSqlNode.java:55) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.lambda$apply$0(MixedSqlNode.java:32) ~[mybatis-3.5.2.jar:3.5.2]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na]
at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:32) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:39) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:297) ~[mybatis-3.5.2.jar:3.5.2]
at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:82) ~[pagehelper-5.1.11.jar:na]
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61) ~[mybatis-3.5.2.jar:3.5.2]
at jdk.proxy2/jdk.proxy2.$Proxy80.query(Unknown Source) ~[na:na]
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) ~[mybatis-3.5.2.jar:3.5.2]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:578) ~[na:na]
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426) ~[mybatis-spring-2.0.2.jar:2.0.2]
at jdk.proxy2/jdk.proxy2.$Proxy58.selectList(Unknown Source) ~[na:na]
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:223) ~[mybatis-spring-2.0.2.jar:2.0.2]
at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80) ~[mybatis-3.5.2.jar:3.5.2]
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:57) ~[mybatis-3.5.2.jar:3.5.2]
at jdk.proxy2/jdk.proxy2.$Proxy65.select(Unknown Source) ~[na:na]
at com.etoak.service.impl.GoodsServiceImpl.select(GoodsServiceImpl.java:37) ~[classes/:na]
at com.etoak.controller.GoodsController.select(GoodsController.java:30) ~[classes/:na]
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:578) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.4.RELEASE.jar:5.1.4.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[na:na]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.14.jar:9.0.14]
at java.base/java.lang.Thread.run(Thread.java:1589) ~[na:na]
```
