maven可执行jar及加载文件

r囧r小猫 2022-10-19 11:29 154阅读 0赞

# 1、使用maven-assembly-plugin插件打包 #

## 1.1 代码 ##

地址：[https://gitee.com/xixingzhe2/learn/tree/master/jar-exe/test-demo][https_gitee.com_xixingzhe2_learn_tree_master_jar-exe_test-demo]

pom.xml

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>3.2.0</version>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>com.api.TestApi</mainClass>
                        </manifest>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

代码

package com.api;
    
    /**
     * @author ybwei
     * @Description
     * @date 2021/7/9 16:32
     **/
    public class TestApi {
    
        public static void main(String[] args) {
            System.out.println("start");
            for (String arg : args) {
                System.out.println("param:"+arg);
            }
            System.out.println("end");
        }
    }

## 1.2 打包 ##

mvn clean package

target目录

2021/07/10  15:53             2,312 test-demo-1.0-jar-with-dependencies.jar
    2021/07/10  15:53             2,316 test-demo-1.0.jar

反编译test-demo-1.0-jar-with-dependencies.jar包

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpeGluZ3poZTI_size_16_color_FFFFFF_t_70][]

## 1.3 执行 ##

### 1.3.1 java -jar ###

$ java -jar test-demo-1.0-jar-with-dependencies.jar
    start
    end

## 1.3.2 java -cp ##

对于java -cp就不需要指定Main-Class来指定入口。因为第一个参数就是你的jar包，第二个参数它会根据你的jar包找到第二个参数指定的TestApi类就指定了你的入口类，来输出aaa。

$ java -cp test-demo-1.0.jar com.api.TestApi
    start
    end

或

$ java -cp test-demo-1.0-jar-with-dependencies.jar com.api.TestApi
    start
    end

## 1.3.3 传入参数 ##

$ java -cp test-demo-1.0.jar com.api.TestApi cc bb
    start
    param:cc
    param:bb
    end

cc，dd为main方法的参数可不填

# 2、加载文件 #

代码地址：[https://gitee.com/xixingzhe2/learn/tree/master/jar-exe/test-config-demo][https_gitee.com_xixingzhe2_learn_tree_master_jar-exe_test-config-demo]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpeGluZ3poZTI_size_16_color_FFFFFF_t_70 1][]

执行如下命令及信息打印

$java -cp test-config-demo-1.0.jar com.api.FileApi config.properties
    start
    加载文件:E:\jar-exe\test-config-demo\target\config.properties
    [name, aa.bb]
    end

[https_gitee.com_xixingzhe2_learn_tree_master_jar-exe_test-demo]: https://gitee.com/xixingzhe2/learn/tree/master/jar-exe/test-demo
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpeGluZ3poZTI_size_16_color_FFFFFF_t_70]: /images/20221005/a2bd8c9cc19c4864a533a4e2ba0c37c0.png
[https_gitee.com_xixingzhe2_learn_tree_master_jar-exe_test-config-demo]: https://gitee.com/xixingzhe2/learn/tree/master/jar-exe/test-config-demo
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpeGluZ3poZTI_size_16_color_FFFFFF_t_70 1]: /images/20221005/5995d6cbea13473887c144286d8c136c.png