upgrade-jdk

升级到现代jdk

jdk8 的逼格已经不足，所以应该升级到最新版本的jdk

jdk 14 还在开发中，　而jdk 13 已经可用，因为jdk 9 发生了根本的改变，添加了模块化系统，所以先升级到jdk 11

如果流畅的升级到了jdk 11, 那么升级到jdk 13 是非常丝滑

作为基础架构在理想情况下，对变更的处理应该是对业务感知比较小(完全无感知是不可能)

PS: 摩尔定律失效，但是启示应该让人深思，每18个月处理器性能升级一倍, 那么软件也应该也一样，每18个月或24个月，软件技术应该升级一倍

修改依赖

Upgrade jdk version

jdeps maven plugin 分析项目升级到jdk 11 所需要解决的问题

root pom.xml

properties

<properties>
<jaxb.version>2.3.0</jaxb.version>                                                                                                                               
<javax.activation.version>1.1.1</javax.activation.version>                                                                                                       
<javax.annotation-api.version>1.3.2</javax.annotation-api.version>  
</proeprties>

profile

<profile>
    <id>jdk9</id>
    <activation>
        <jdk>[9,)</jdk>
    </activation>
    <!-- TODO using jdk argLine to get rid of the jaxb dependencies -->
    <properties>
        <jdk.argLine>--add-modules java.xml.bind</jdk.argLine>
    </properties>
    <dependencies>
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>${jaxb.version}</version>
        </dependency>
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-impl</artifactId>
            <version>${jaxb.version}</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jaxb</groupId>
            <artifactId>jaxb-runtime</artifactId>
            <version>${jaxb.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>${javax.activation.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
            <version>${javax.annotation-api.version}</version>
        </dependency>
    </dependencies>
</profile>

child project dependency

base project dependency

<dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>${jaxb.version}</version>
    </dependency>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-impl</artifactId>
        <version>${jaxb.version}</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jaxb</groupId>
        <artifactId>jaxb-runtime</artifactId>
        <version>${jaxb.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.activation</groupId>
        <artifactId>activation</artifactId>
        <version>${javax.activation.version}</version>
    </dependency>

lock project dependency

<dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>${jaxb.version}</version>
    </dependency>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-impl</artifactId>
        <version>${jaxb.version}</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jaxb</groupId>
        <artifactId>jaxb-runtime</artifactId>
        <version>${jaxb.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.activation</groupId>
        <artifactId>activation</artifactId>
        <version>${javax.activation.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.annotation</groupId>
        <artifactId>javax.annotation-api</artifactId>
        <version>${javax.annotation-api.version}</version>
    </dependency>

碰到的困难

调用com.sun.tools 有些问题，特别是做一些类似lombok 的工具时