简谈Spring Boot3.0升级后的踩坑之旅，另附解决方案！ - ToB企服应用市场:ToB评测及商务社交产业平台

<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
</dependency>

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修改前：
import javax.servlet.*
修改后：
import jakarta.servlet.*

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14:40:39.936 [http-nio-84-exec-15] WARN o.t.s.p.StandardIncludeTagProcessor - [doProcess,67] - [THYMELEAF][http-nio-84-exec-15][admin/goods/goods] Deprecated attribute {th:include,data-th-include} found in template admin/goods/goods, line 4, col 15. Please use {th:insert,data-th-insert} instead, this deprecated attribute will be removed in future versions of Thymeleaf.
14:40:39.936 [http-nio-84-exec-15] WARN o.t.s.p.AbstractStandardFragmentInsertionTagProcessor - [computeFragment,385] - [THYMELEAF][http-nio-84-exec-15][admin/goods/goods] Deprecated unwrapped fragment expression "admin/header :: header-fragment" found in template admin/goods/goods, line 4, col 15. Please use the complete syntax of fragment expressions instead ("~{admin/header :: header-fragment}"). The old, unwrapped syntax for fragment expressions will be removed in future versions of Thymeleaf.

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修改前：
<th:block th:include="admin/header :: header-fragment"/>
修改后：
<th:block th:insert="~{admin/header :: header-fragment}"/>

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// 修改前 Spring Boot2.7：
WebContext ctx = new (request, response,
request.getServletContext(), request.getLocale(), model.asMap());
html = thymeleafViewResolver.getTemplateEngine().process("mall/seckill-list", ctx);

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// 修改后 Spring Boot3.0：
JakartaServletWebApplication jakartaServletWebApplication = JakartaServletWebApplication.buildApplication(request.getServletContext());
WebContext ctx = new WebContext(jakartaServletWebApplication.buildExchange(request, response), request.getLocale(), model.asMap());
html = thymeleafViewResolver.getTemplateEngine().process("mall/seckill-list", ctx);

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@Slf4j
@EnableConfigurationProperties(MybatisPlusProperties.class)
@EnableTransactionManagement
@EnableAspectJAutoProxy
@Configuration
@MapperScan(basePackages = "ltd.newbee.mall.core.dao", sqlSessionFactoryRef = "masterSqlSessionFactory")
public class HikariCpConfig {
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor() {
MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
return interceptor;
}
@Bean(name = "masterDataSource")
@ConfigurationProperties(prefix = "spring.datasource.master")
public DataSource masterDataSource() {
return new HikariDataSource();
}
/**
* @param datasource 数据源
* @return SqlSessionFactory
* @Primary 默认SqlSessionFactory
*/
@Bean(name = "masterSqlSessionFactory")
public SqlSessionFactory masterSqlSessionFactory(@Qualifier("masterDataSource") DataSource datasource,
Interceptor interceptor,
MybatisPlusProperties properties) throws Exception {
MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
bean.setDataSource(datasource);
// 兼容mybatis plus的自动配置写法
bean.setMapperLocations(properties.resolveMapperLocations());
if (properties.getConfigurationProperties() != null) {
bean.setConfigurationProperties(properties.getConfigurationProperties());
}
if (StringUtils.hasLength(properties.getTypeAliasesPackage())) {
bean.setTypeAliasesPackage(properties.getTypeAliasesPackage());
}
bean.setPlugins(interceptor);
GlobalConfig globalConfig = properties.getGlobalConfig();
bean.setGlobalConfig(globalConfig);
log.info("------------------------------------------masterDataSource 配置成功");
return bean.getObject();
}
@Bean("masterSessionTemplate")
public SqlSessionTemplate masterSessionTemplate(@Qualifier("masterSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}
}

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