java - 以编程方式检查java文件的编译错误

Question

我想以编程方式检查 java 类是否存在编译错误。你能告诉我如何做到这一点吗？

Answer 1

您可以使用JavaCompiler API编译该类，它会让您知道是否存在一些编译错误。

人为示例(使用字符串作为输入，但您可以改为读取文件):

String className = "somepackage.YourClass";
String body = "package somepackage;   "
                + "public class YourClass {         "
                + "}                              ";
compile(className, body, TEMP_PATH); //TEMP_PATH: Where the .class file is saved

编译可能如下所示:

private static void compile(String className, String body, Path path) throws Exception {
    List<JavaSourceFromString> sourceCode = Arrays.asList(new JavaSourceFromString(className, body));

    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);
    fileManager.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(path.toFile()));
    boolean ok = compiler.getTask(null, fileManager, null, null, null, sourceCode).call();

    System.out.println("compilation ok = " + ok);
}