http://maven.apache.org/plugins/maven-shade-plugin/

需求1

如果我们要提供一个 SDK 给被人用, 而我们自己的代码还依赖的别的 sdk 或者别的的 jar 包,这个时候在给别人用的时候就会出现 jar 包冲突的问题,或者隐藏着不兼容的问题, 那么这个时候我们就可以将依赖的包改名打包到一个 jar 包里面供他人引用

代码演示

1. maven配置

 <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.1</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <relocations>
                                <relocation>
                                    <pattern>org.apache.commons.lang3</pattern>
                                    <shadedPattern>cn.wyj.commons.lang3</shadedPattern>
                                </relocation>
                            </relocations>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

2. 打包前的代码

package cn.wyj.learn.maven;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

@Slf4j
public class TestMerge {
    public static void main(String[] args) {
        String str = "hello world";
        boolean empty = StringUtils.isEmpty(str);
        log.info("empty: {}", empty);
        log.info("str: {}", str);

    }
}

3. 打包后的代码,反编译

image.png

package cn.wyj.learn.maven;

import cn.wyj.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TestMerge {
    private static final Logger log = LoggerFactory.getLogger(TestMerge.class);

    public TestMerge() {
    }

    public static void main(String[] args) {
        String str = "hello world";
        boolean empty = StringUtils.isEmpty(str);
        log.info("empty: {}", empty);
        log.info("str: {}", str);
    }
}