使用JavaCompiler API进行Java代码编译和编译错误处理 [英] Java code compilation using JavaCompiler API and compilation errors handling

问题描述

我有以下Java代码使用 javax.tools.JavaCompiler API编译给定的Java代码：

I have the following Java code that compiles the given Java code using the javax.tools.JavaCompiler API:

JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
ByteArrayOutputStream err = new ByteArrayOutputStream();
compiler.run(new FileInputStream("Test.java"), 
    new FileOutputStream("Test.class"), 
    err, 
    "Test.java"); // Test.java contains the code of a simple Java class
String compilationErrors = err.toString();

在上面的代码中，所有编译错误都返回为 String 实例。

In the above code, all compilation errors are returned as one String instance.

有一种方法可以解析i.d.的编译错误。

Is there a way to get compilation errors parsed i.d. get the file name, line number, cause of the error and line of code or do I have to do the parsing?

推荐答案

如何获取文件名，行号，错误原因和代码行？根据我对 JavaCompiler.getTask 我建议您添加 DiagnosticListener 。似乎提供了所需的所有细节。

According to my understanding of JavaCompiler.getTask(..) I'd suggest adding a DiagnosticListener. It seems to provide all the details needed.

这是我一直在寻找的代码：

This is the code I have been looking for:

JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

DiagnosticCollector<JavaFileObject> diagnostics = 
    new DiagnosticCollector<JavaFileObject>();         
StandardJavaFileManager fileManager = compiler.
    getStandardFileManager(diagnostics, null, null);

Iterable<? extends JavaFileObject> compilationUnits = fileManager.
    getJavaFileObjectsFromFiles(Arrays.asList(new File("Test.java")));
CompilationTask task = compiler.getTask(null, fileManager, diagnostics, 
    null, null, compilationUnits);

task.call();

for(Diagnostic<?> error : diagnostics.getDiagnostics()) {
    // 
}

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