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Cross domain access problem
Failed to load resource: net::ERR_CONNECTION_REFUSED
Access toXMLHttpRequest at ‘http://localhost:8080/user/login’ from origin
‘http://localhost:9999’ has been blocked by CORS policy: No
‘Access-Control-Allow-Origin’ header is present on the requested
resource.
Add @CrossOrigin
swagger suddenly jumps to the login page
The final reason is that the security package is imported, resulting in permission security interception
Runs successfully after commenting
报错：Skipping MapperFactoryBean with name ‘userMapper’ and ‘cn.mbz.parkingsystem.mapper.UserMapper’ mapperInterface. Bean already defined with the same name!
No MyBatis mapper was found in ‘[xx.mapper]‘ package. Please check your configuration.
solution:
Just comment out @MapperScan("com.tony.ssmmd.mapper") in the main startup file, and only keep @MapperScan("com.xxx.xxx. mapper")
In fact, two of them can be reserved for one
The user list cannot be loaded. Request failed with status code 500
后端报错
ERROR 18400 — [nio-8080-exec-6] 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.NullPointerException] with root cause
Data cannot be used, change it to params.