Convert spring MVC project to spring boot project
Question 1: compatibility between mybatis and mybatis plus
Reference solution:
Two cannot exist in the pom.xml file at the same time, which may cause compatibility problems
Problem 2: ES configuration error
Error display: caused by: java.lang.noclassdeffounderror: org / elasticsearch / client / cancelable
Solution: add some content in the tag of pom.xml
<java.version>1.8</java.version>
<elasticsearch.version>7.6.2</elasticsearch.version>
Question 3: if the field value in Mysql obtained by mybaits plus is [] type, it is null
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Because the attribute corresponding to the entity class defines TableField
As follows:
/**
* Role list
*/
@TableField(typeHandler = JsonIntegerArrayTypeHandler.class)
private Integer[] roleIds;
Therefore, you need to configure the scan handel in application.yml
#mybatis-plus
mybatis-plus:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.qf.pojo
configuration:
map-underscore-to-camel-case: true
typeHandlersPackage: com.qf.handler #To configure this scan
Explanation on the official website:
TypeHandler scanning path. If this property is configured, SqlSessionFactoryBean will register the class under the package as the corresponding TypeHandler; TypeHandler is usually used for custom type conversion.
Problem 4: spring boot integration mybatis plus paging failure
Plug in body (must see!) (since 3.4.0) | mybatis plus (baomidou. Com)
Add this configuration
@Configuration
@MapperScan("scan.your.mapper.package")
public class MybatisPlusConfig {
/**
* The new paging plug-in follows the rules of mybatis. MybatisConfiguration#useDeprecatedExecutor = false should be set to avoid cache problems (this attribute will be removed after the old plug-in is removed)
*/
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor() {
MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.H2));
return interceptor;
}
@Bean
public ConfigurationCustomizer configurationCustomizer() {
return configuration -> configuration.setUseDeprecatedExecutor(false);
}
}
Question 5: add, delete and modify the association of multiple tables through the ID of Goods
When the primary key of an entity class is self incremented, the id (primary key) attribute of the entity class will be assigned to the automatically generated primary key after calling insert. If it is not obtained after insert, the id is empty, and the data inserted in all other associated tables are not associated with the commodity table
dtsGoodsMapper.insert(goods);
//Here, the id attribute in the commodity class after insert is obtained. Because it is self incremented, it can only be obtained after insert
Integer gid = goods.getId();
log.info("[Commodity management] commodity on the shelf->commodity ID，Response data:{}",gid);
for (DtsGoodsAttribute attribute : attributes) {
attribute.setGoodsId(gid);
dtsGoodsAttributeService.add(attribute);
}
for (DtsGoodsProduct product : products) {
product.setGoodsId(gid);
dtsGoodsProductService.add(product);
}
for (DtsGoodsSpecification specification : specifications) {
specification.setGoodsId(gid);
dtsGoodsSpecificationService.add(specification);
}
log.info("[Commodity management] commodity modification->Products on the shelf, response results:{}","success");
return ResponseUtil.ok();
Problem 6: jar package problem: no main list attribute
Question: shops_ There is no main manifest attribute in managenew.jar
Solution: add the following to the pom.xml file
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
When running mvn install, these main list attributes are automatically generated. When running java -jar xxx.jar, the startup class will be found according to the main list attributes to start the program.
Problem 7: JackSon problem during jar package startup
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-10-03 13:51:29.326 ERROR 39476 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'routerFunctionMapping' defined in class path resource [com/qf/config/SwaggerConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.function.support.RouterFunctionMapping]: Factory method 'routerFunctionMapping' threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/TSFBuilder
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:656) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:636) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:882) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.6.RELEASE.jar!/:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.6.RELEASE.jar!/:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.6.RELEASE.jar!/:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.6.RELEASE.jar!/:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.6.RELEASE.jar!/:2.2.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.6.RELEASE.jar!/:2.2.6.RELEASE]
at com.qf.ApplicationWeb.main(ApplicationWeb.java:12) [classes!/:1.0-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_292]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_292]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_292]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_292]
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) [shops_manageNew-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) [shops_manageNew-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
at org.springframework.boot.loader.Launcher.launch(Launcher.java:51) [shops_manageNew-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:52) [shops_manageNew-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.function.support.RouterFunctionMapping]: Factory method 'routerFunctionMapping' threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/TSFBuilder
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:651) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
... 27 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/TSFBuilder
at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder$SmileFactoryInitializer.create(Jackson2ObjectMapperBuilder.java:908) ~[spring-web-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.smile(Jackson2ObjectMapperBuilder.java:868) ~[spring-web-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.http.converter.smile.MappingJackson2SmileHttpMessageConverter.<init>(MappingJackson2SmileHttpMessageConverter.java:50) ~[spring-web-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:90) ~[spring-web-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.addDefaultHttpMessageConverters(WebMvcConfigurationSupport.java:856) ~[spring-webmvc-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.getMessageConverters(WebMvcConfigurationSupport.java:811) ~[spring-webmvc-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.routerFunctionMapping(WebMvcConfigurationSupport.java:515) ~[spring-webmvc-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at com.qf.config.SwaggerConfig$$EnhancerBySpringCGLIB$$53e93b27.CGLIB$routerFunctionMapping$45(<generated>) ~[classes!/:1.0-SNAPSHOT]
at com.qf.config.SwaggerConfig$$EnhancerBySpringCGLIB$$53e93b27$$FastClassBySpringCGLIB$$768dd8f3.invoke(<generated>) ~[classes!/:1.0-SNAPSHOT]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~[spring-context-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
at com.qf.config.SwaggerConfig$$EnhancerBySpringCGLIB$$53e93b27.routerFunctionMapping(<generated>) ~[classes!/:1.0-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_292]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_292]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_292]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_292]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.5.RELEASE.jar!/:5.2.5.RELEASE]
... 28 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.core.TSFBuilder
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_292]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_292]
at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:92) ~[shops_manageNew-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_292]
Question: nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/TSFBuilder
Solution: jackson imported from the pom.xml file depends on all comments. It is said on the Internet that jackson is built in springboot, which is incompatible with the imported version. Either comment or introduce a higher version; Here I have all the notes