英文:
compile java with external jar file in terminal
问题
你好，我想在终端中编译Java代码，我在终端中输入以下命令：
javac -cp .:../../lucene-8.6.3/lucene-8.6.3/core/lucene-core-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/analysis/common/lucene-analyzers-common-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/queryparser/lucene-queryparser-8.6.3.jar IndexFiles.java
我没有收到任何错误，然后我输入以下命令来运行：
java -cp .:../../lucene-8.6.3/lucene-8.6.3/core/lucene-core-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/analysis/common/lucene-analyzers-common-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/queryparser/lucene-queryparser-8.6.3.jar IndexFiles
但是我收到了以下错误：
错误: 找不到或无法加载主类 IndexFiles原因: java.lang.NoClassDefFoundError: lucene/IndexFiles (名称不正确: IndexFiles)
我该怎么办？我错在哪里？
这是 IndexFiles 类的内容：
package lucene;import org.apache.lucene.analysis.Analyzer;import org.apache.lucene.analysis.standard.StandardAnalyzer;import org.apache.lucene.document.*;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.index.IndexWriterConfig;import org.apache.lucene.index.IndexWriterConfig.OpenMode;import org.apache.lucene.index.Term;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import java.io.FileReader;import java.io.IOException;import java.io.InputStream;import java.nio.charset.Charset;import java.nio.charset.StandardCharsets;import java.nio.file.*;import java.nio.file.attribute.BasicFileAttributes;import java.util.Date;/** 对目录下的所有文本文件进行索引。* <p>* 这是一个命令行应用程序，演示了简单的Lucene索引操作。* 在没有命令行参数的情况下运行，以获取使用信息。*/public class IndexFiles {....
英文:
Hi I want to compile java code in the terminal I enter the below command in terminal
javac -cp .:../../lucene-8.6.3/lucene-8.6.3/core/lucene-core-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/analysis/common/lucene-analyzers-common-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/queryparser/lucene-queryparser-8.6.3.jar IndexFiles.java
and i dont get any error, and after i enter below command to run:
java -cp .:../../lucene-8.6.3/lucene-8.6.3/core/lucene-core-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/analysis/common/lucene-analyzers-common-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/queryparser/lucene-queryparser-8.6.3.jar IndexFiles
but I get this error:
Error: Could not find or load main class IndexFilesCaused by: java.lang.NoClassDefFoundError: lucene/IndexFiles (wrong name: IndexFiles)
what should I do? and what is my wrong?
and this is IndexFiles class
package lucene;import org.apache.lucene.analysis.Analyzer;import org.apache.lucene.analysis.standard.StandardAnalyzer;import org.apache.lucene.document.*;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.index.IndexWriterConfig;import org.apache.lucene.index.IndexWriterConfig.OpenMode;import org.apache.lucene.index.Term;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import java.io.FileReader;import java.io.IOException;import java.io.InputStream;import java.nio.charset.Charset;import java.nio.charset.StandardCharsets;import java.nio.file.*;import java.nio.file.attribute.BasicFileAttributes;import java.util.Date;/** Index all text files under a directory.* <p>* This is a command-line application demonstrating simple Lucene indexing.* Run it with no command-line arguments for usage information.*/public class IndexFiles {....
答案1
得分: 0
由于你的类位于lucene包中，所以这个类名是你需要传递给java的，它需要完全限定名。
CLASSPATH=../../lucene-8.6.3/lucene-8.6.3/core/lucene-core-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/analysis/common/lucene-analyzers-common-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/queryparser/lucene-queryparser-8.6.3.jarjava -cp ".:$CLASSPATH" lucene.IndexFiles
你还需要确保.class文件实际上位于正确的位置。在你的情况下，路径应为./lucene/IndexFiles.class。
英文:
Since your class is in the package lucene, that’s the class name that you need to pass to java: it requires the fully qualified name.
CLASSPATH=../../lucene-8.6.3/lucene-8.6.3/core/lucene-core-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/analysis/common/lucene-analyzers-common-8.6.3.jar:../../lucene-8.6.3/lucene-8.6.3/queryparser/lucene-queryparser-8.6.3.jarjava -cp ".:$CLASSPATH" lucene.IndexFiles
You’ll also need to make sure that the .class file is actually at the right location. In your case, that would be ./lucene/IndexFiles.class.
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