Java compiler - Java javax.tools

Java examples for javax.tools:JavaCompiler

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Description

Java compiler

Demo Code


import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticCollector;
import javax.tools.JavaCompiler;
import javax.tools.JavaCompiler.CompilationTask;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;

public class Main{
    private static LogUtil log = LogUtil.getLogger(CompilerUtil.class);
    //w  w w .  j a  va2  s  . c  o m
    private static boolean compiler(String encoding, String jars,
            String filePath, String distDir,
            DiagnosticCollector<JavaFileObject> diagnostics) {
        // ?   
        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        StandardJavaFileManager fileManager = compiler
                .getStandardFileManager(null, null, null);

        // filePathjava   
        File sourceFile = new File(filePath);
        List<File> sourceFileList = new ArrayList<File>();
        sourceFileList = getSourceFiles(sourceFile);
        // java?   
        if (sourceFileList.size() == 0) {
            log.error(filePath + "java");
            return false;
        }
        // ?   
        Iterable<? extends JavaFileObject> compilationUnits = fileManager
                .getJavaFileObjectsFromFiles(sourceFileList);
        //javajavajavaclass? -classpathclass  
        Iterable<String> options = Arrays.asList("-encoding", encoding,
                "-classpath", jars, "-d", distDir);
        CompilationTask compilationTask = compiler.getTask(null,
                fileManager, diagnostics, options, null, compilationUnits);

        // ?   
        boolean res = compilationTask.call();
        try {
            fileManager.close();
        } catch (IOException e) {
            log.error("?");
            log.error(e.getMessage());
        }
        return res;
    }
    
    private static List<File> getSourceFiles(File sourceFile) {
        List<File> sourceFileList = new ArrayList<File>();
        if (sourceFile.exists() && sourceFileList != null) {//   
            if (sourceFile.isDirectory()) {// ?file?
                // ?.java?   
                List<String> sourceFileListTmp = FileUtil
                        .getFilesFromFolder(sourceFile.getPath(), "java");
                for (String filePath : sourceFileListTmp) {
                    sourceFileList.add(new File(filePath));
                }
            } else {// ?file?   
                sourceFileList.add(sourceFile);
            }
        } else {
            log.error("?: " + sourceFile);
        }
        return sourceFileList;
    }
}

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