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;
}
}