Сценарій:
1) client-service-1.0-SNAPSHOT.jarмає залежністьread-classpath-resource-1.0-SNAPSHOT.jar
2) ми хочемо прочитати вміст ресурсів шляху до класу ( sample.txt) read-classpath-resource-1.0-SNAPSHOT.jarчерез client-service-1.0-SNAPSHOT.jar.
3) read-classpath-resource-1.0-SNAPSHOT.jarмаєsrc/main/resources/sample.txt
Ось робочий зразок коду, який я підготував, через 2-3 дні, витрачаючи час на розробку, я знайшов повне комплексне рішення, сподіваюся, це допоможе заощадити ваш час
1. pom.xmlзread-classpath-resource-1.0-SNAPSHOT.jar
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>jar-classpath-resource</groupId>
<artifactId>read-classpath-resource</artifactId>
<version>1.0-SNAPSHOT</version>
<name>classpath-test</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<org.springframework.version>4.3.3.RELEASE</org.springframework.version>
<mvn.release.plugin>2.5.1</mvn.release.plugin>
<output.path>${project.artifactId}</output.path>
<io.dropwizard.version>1.0.3</io.dropwizard.version>
<commons-io.verion>2.4</commons-io.verion>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.verion}</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-release-plugin</artifactId>
<version>${mvn.release.plugin}</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.5</version>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<useUniqueVersions>false</useUniqueVersions>
<addDefaultImplementationEntries>true</addDefaultImplementationEntries>
<mainClass>demo.read.classpath.resources.ClassPathResourceReadTest</mainClass>
</manifest>
<manifestEntries>
<Implementation-Artifact-Id>${project.artifactId}</Implementation-Artifact-Id>
<Class-Path>sample.txt</Class-Path>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.2</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>demo.read.classpath.resources.ClassPathResourceReadTest</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
2. ClassPathResourceReadTest.javaклас, read-classpath-resource-1.0-SNAPSHOT.jarщо завантажує вміст файлу ресурсів шляху до класу.
package demo.read.classpath.resources;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public final class ClassPathResourceReadTest {
public ClassPathResourceReadTest() throws IOException {
InputStream inputStream = getClass().getResourceAsStream("/sample.txt");
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
List<Object> list = new ArrayList<>();
String line;
while ((line = reader.readLine()) != null) {
list.add(line);
}
for (Object s1: list) {
System.out.println("@@@ " +s1);
}
System.out.println("getClass().getResourceAsStream('/sample.txt') lines: "+list.size());
}
}
3. pom.xmlзclient-service-1.0-SNAPSHOT.jar
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>client-service</groupId>
<artifactId>client-service</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>jar-classpath-resource</groupId>
<artifactId>read-classpath-resource</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.5</version>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<useUniqueVersions>false</useUniqueVersions>
<addDefaultImplementationEntries>true</addDefaultImplementationEntries>
<mainClass>com.crazy.issue.client.AccessClassPathResource</mainClass>
</manifest>
<manifestEntries>
<Implementation-Artifact-Id>${project.artifactId}</Implementation-Artifact-Id>
<Implementation-Source-SHA>${buildNumber}</Implementation-Source-SHA>
<Class-Path>sample.txt</Class-Path>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.2</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.crazy.issue.client.AccessClassPathResource</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
4. клас AccessClassPathResource.javaекземплярів, ClassPathResourceReadTest.javaде він завантажується sample.txtі також друкує його вміст.
package com.crazy.issue.client;
import demo.read.classpath.resources.ClassPathResourceReadTest;
import java.io.IOException;
public class AccessClassPathResource {
public static void main(String[] args) throws IOException {
ClassPathResourceReadTest test = new ClassPathResourceReadTest();
}
}
5. Виконати виконувану банку наступним чином:
[ravibeli@localhost lib]$ java -jar client-service-1.0-SNAPSHOT.jar
****************************************
I am in resources directory of read-classpath-resource-1.0-SNAPSHOT.jar
****************************************
3) getClass().getResourceAsStream('/sample.txt'): 3
getResourceAsStream()