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相信很多朋友在使用新版本的Spring的时候,发现了一些叫jakarta的包,看起来有点陌生。
很多时候,比较纠结不知道该导入哪一个包。
jakarta其实就是之前的javax。
主要JavaEE相关的,从之前javax名字也可以看出来,主要是扩展部分,最典型的就是Servlet。
Oracle已经将JavaEE捐献给了Eclipse基金会,从JavaEE 8开始就被正式被改名为jakarta EE
javax这个包是Oracle的,涉及商标和版权原因,所以改名也很正常。
新版本的除了包含在JDK包中的除了javax.sql部分的,其他的javax部分基本都会替换为jakarta。
<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<version>6.1.0-M1</version>
<scope>provided</scope>
</dependency>
javax.servlet在2018年之后就没有更新了,因为2018年Oracle把JavaEE捐赠给Eclipse基金会之后项目就迁移了。
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
新版本的Spring已经使用的是Jakarta了:
Druid也添加了相应的支持:
下面我们就以Druid为例,来看一看。
可以使用druid的starter
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.2.20</version>
</dependency>
spring.datasource.initial-size=5 spring.datasource.min-idle=5 spring.datasource.max-active=25 spring.datasource.max-wait=1000 spring.datasource.time-between-eviction-runs-millis=60000 spring.datasource.validation-query=SELECT 1 as nums spring.datasource.test-while-idle=true spring.datasource.test-on-borrow=false spring.datasource.test-on-return=false spring.datasource.pool-prepared-statements=true spring.datasource.max-pool-prepared-statement-per-connection-size=20 spring.datasource.druid.filters=stat,wall,slf4j spring.druid.stat-view-servlet.enabled=true spring.druid.stat-view-servlet.url-pattern=/druid/* spring.druid.stat-view-servlet.login-username=tim spring.druid.stat-view-servlet.login-password=123456 spring.druid.web-stat-filter.enabled=true spring.druid.web-stat-filter.url-pattern=/* spring.druid.web-stat-filter.exclusions='*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*' spring.druid.filter.stat.slow-sql-millis=1000 spring.druid.filter.stat.log-slow-sql=true spring.druid.filter.stat.enabled=true spring.druid.filter.wall.enabled=true spring.druid.filter.wall.config.drop-table-allow=false spring.druid.filter.wall.config.select-all-column-allow=false
也可以直接使用druid
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.20</version>
</dependency>
import com.alibaba.druid.pool.DruidDataSource; import com.alibaba.druid.support.jakarta.StatViewServlet; import com.alibaba.druid.support.jakarta.WebStatFilter; import lombok.extern.slf4j.Slf4j; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.boot.web.servlet.FilterRegistrationBean; import org.springframework.boot.web.servlet.ServletRegistrationBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import javax.sql.DataSource; import java.sql.SQLException; import java.util.List; @Configuration @Slf4j public class DruidDataSourceConfig { @ConfigurationProperties(prefix = "spring.datasource") @Bean public DataSource dataSource() { DruidDataSource druidDataSource = new DruidDataSource(); try { druidDataSource.setFilters("stat,wall"); } catch (SQLException e) { log.error(e.getMessage(),e); } return druidDataSource; } @Bean public ServletRegistrationBean<StatViewServlet> statViewServlet() { StatViewServlet statViewServlet = new StatViewServlet(); ServletRegistrationBean<StatViewServlet> servletRegistrationBean = new ServletRegistrationBean<>(statViewServlet, "/druid/*"); servletRegistrationBean.addInitParameter("loginUsername", "druid"); servletRegistrationBean.addInitParameter("loginPassword", "123456"); return servletRegistrationBean; } @Bean public FilterRegistrationBean<WebStatFilter> webStatFilter() { WebStatFilter webStatFilter = new WebStatFilter(); FilterRegistrationBean<WebStatFilter> filterRegistrationBean = new FilterRegistrationBean<>(webStatFilter); // 设置统计的Web URL filterRegistrationBean.setUrlPatterns(List.of("/*")); // 设置排除的Web URL filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"); return filterRegistrationBean; } }
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