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field 'subwayLineName' cannot be found on null

来源：7-3 默认排序实现（下）

慕粉3695709

2018-04-16

不知道为什么会报这个错误，希望老师帮忙看看。

错误报告：

Caused by: org.attoparser.ParseException: Exception evaluating SpringEL expression: "house.houseDetail.subwayLineName != null" (template: "rent-list" - line 269, col 55)

at org.attoparser.MarkupParser.parseDocument(MarkupParser.java:393) ~[attoparser-2.0.2.RELEASE.jar:2.0.2.RELEASE]

at org.attoparser.MarkupParser.parse(MarkupParser.java:257) ~[attoparser-2.0.2.RELEASE.jar:2.0.2.RELEASE]

at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:230) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

... 88 common frames omitted

Caused by: org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "house.houseDetail.subwayLineName != null" (template: "rent-list" - line 269, col 55)

at org.thymeleaf.spring4.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:290) ~[thymeleaf-spring4-3.0.2.RELEASE.jar:3.0.2.RELEASE]

at org.thymeleaf.standard.expression.VariableExpression.executeVariableExpression(VariableExpression.java:165) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:66) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.Expression.execute(Expression.java:109) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.Expression.execute(Expression.java:138) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.Expression.execute(Expression.java:125) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.processor.StandardIfTagProcessor.isVisible(StandardIfTagProcessor.java:59) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.processor.AbstractStandardConditionalVisibilityTagProcessor.doProcess(AbstractStandardConditionalVisibilityTagProcessor.java:61) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

（此处省略）

... 90 common frames omitted

Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1007E: Property or field 'subwayLineName' cannot be found on null

at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:222) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:94) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.PropertyOrFieldReference.access$000(PropertyOrFieldReference.java:46) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:379) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.OpNE.getValueInternal(OpNE.java:43) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.OpNE.getValueInternal(OpNE.java:33) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:120) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:324) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.thymeleaf.spring4.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:263) ~[thymeleaf-spring4-3.0.2.RELEASE.jar:3.0.2.RELEASE]

... 117 common frames omitted


2018-04-16 02:41:27.560 ERROR 7380 --- [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 org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/rent-list.html]")] with root cause


org.springframework.expression.spel.SpelEvaluationException: EL1007E: Property or field 'subwayLineName' cannot be found on null

at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:222) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:94) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.PropertyOrFieldReference.access$000(PropertyOrFieldReference.java:46) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:379) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.OpNE.getValueInternal(OpNE.java:43) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.OpNE.getValueInternal(OpNE.java:33) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:120) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:324) ~[spring-expression-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.thymeleaf.spring4.expression.SPELVariableExpressionEvaluator.evaluate(SPELVariableExpressionEvaluator.java:263) ~[thymeleaf-spring4-3.0.2.RELEASE.jar:3.0.2.RELEASE]

at org.thymeleaf.standard.expression.VariableExpression.executeVariableExpression(VariableExpression.java:165) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.SimpleExpression.executeSimple(SimpleExpression.java:66) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.Expression.execute(Expression.java:109) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.Expression.execute(Expression.java:138) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.expression.Expression.execute(Expression.java:125) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.processor.StandardIfTagProcessor.isVisible(StandardIfTagProcessor.java:59) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.standard.processor.AbstractStandardConditionalVisibilityTagProcessor.doProcess(AbstractStandardConditionalVisibilityTagProcessor.java:61) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess(AbstractAttributeTagProcessor.java:74) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

at org.thymeleaf.processor.element.AbstractElementTagProcessor.process(AbstractElementTagProcessor.java:95) ~[thymeleaf-3.0.3.RELEASE.jar:3.0.3.RELEASE]

（此处省略）

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]

at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:167) ~[spring-session-1.3.1.RELEASE.jar:na]

at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:80) ~[spring-session-1.3.1.RELEASE.jar:na]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]

at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457) [tomcat-embed-core-8.5.20.jar:8.5.20]

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.20.jar:8.5.20]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_91]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_91]

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.20.jar:8.5.20]

at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]

页面显示如下：


//img.mukewang.com/szimg/5ad39eaa00010dce12010502.jpg

写回答

3回答

慕斯卡9539982

2018-05-19

houses.forEach(house -> {
   HouseDTO houseDTO = modelMapper.map(house, HouseDTO.class);
   HouseDetail houseDetail = houseDetailRepository.findByHouseId(house.getId());
   houseDTO.setHouseDetail(modelMapper.map(houseDetail, HouseDetailDTO.class));
   houseDTO.setCover(cdnPrefix + house.getCover());
   houseDTOS.add(houseDTO);
});

3
0

慕粉3695709

提问者

2018-04-16

已解决

2
1
慕数据4226701
怎么解决的
2019-03-28
共1条回复

瓦力老师

2018-04-16

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