java開發(fā)中錯誤記錄匯總
2023-04-12
java開發(fā)中錯誤記錄匯總
- json相關
- https相關
- springboot
- No adapter for handler
- 'RedisTemplate' that could not be found.
- Invalid bound statement (not found)
json相關
1、在Apifox測試http請求，使用json格式的數(shù)據(jù)請求時，報錯。
Resolved [org.springframework.http.converter.HttpMessageNotReadableException:
JSON parse error:
Unexpected character ('u' (code 117)):
was expecting double-quote to start field name;
nested exception is com.fasterxml.jackson.core.JsonParseException:
Unexpected character ('u' (code 117)):
was expecting double-quote to start field name at [Source: (org.springframework.util.StreamUtils$NonClosingInputStream); line: 2, column: 2]] json數(shù)據(jù)格式錯誤，key需要使用雙引號。
https相關
1、訪問https協(xié)議的請求時，報錯。
sun.security.validator.ValidatorException:
PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target沒有驗證證書導致。解決方式，要么驗證，要么忽略。
springboot
No adapter for handler
1、新建工程訪問請求時出現(xiàn)。
javax.servlet.ServletException: No adapter for handler [com.spring.demo.web.GreetingController@3f37413a]: The DispatcherServlet configuration needs to include a HandlerAdapter that supports this handler
at org.springframework.web.servlet.DispatcherServlet.getHandlerAdapter(DispatcherServlet.java:1302) ~[spring-webmvc-5.3.19.jar:5.3.19]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1050) ~[spring-webmvc-5.3.19.jar:5.3.19]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.19.jar:5.3.19]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.19.jar:5.3.19]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.19.jar:5.3.19]沒有HandlerAdapter適配器。原因是我的Controller沒有正確配置RequestMapping。
‘RedisTemplate’ that could not be found.
2、集成redis，啟動時報錯如下：
Field redisTemplate in com.example.common.redis.RedisBean required a bean of type 'org.springframework.data.redis.core.RedisTemplate' that could not be found.
The injection point has the following annotations:
- @org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type 'org.springframework.data.redis.core.RedisTemplate' in your configuration.解決辦法：將@Autowired改為@Resource解決問題，經(jīng)查二者區(qū)別如下：
- @Autowired默認按照byType方式進行bean匹配，@Resource默認按照byName方式進行bean匹配
- @Autowired是Spring的注解，@Resource是J2EE的注解
Invalid bound statement (not found)
mybatis集成報錯：
Invalid bound statement (not found): com.soft.mapper.test.SysRoleMapper.selectRoleList解決辦法：
- 查詢xml文件中namespace是否和mapper接口實際路徑對應，經(jīng)查一致；
- mapper接口方法和xml文件中的id是否一致，經(jīng)查一致；
- 查看yml文件中mapperLocations配置項，經(jīng)查mapperLocations配置為：classpath*:mapper/Mapper.xml，修改為classpath:mapper/**/*Mapper.xml，重啟測試ok。
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