- 参照网上其他童鞋的例子与介绍,修改了一下:
- import java.io.IOException;
- import java.lang.reflect.Method;
- import java.net.URI;
- import java.net.URISyntaxException;
- import java.util.Arrays;
- import javax.tools.JavaCompiler;
- import javax.tools.JavaCompiler.CompilationTask;
- import javax.tools.JavaFileObject;
- import javax.tools.SimpleJavaFileObject;
- import javax.tools.StandardJavaFileManager;
- import javax.tools.ToolProvider;
- /**
- * 动态编译Java 源文件
- *
- * @author shenshouer
- *
- */
- public class CompilerTest {
- public static void main(String[] args) throws Exception {
- String source = "public class Main { " + "public static void main(String[]args) {"
- + "System.out.println(\"Hello World!\");" + "} " + "}";
- JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
- StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);
- StringSourceJavaObject sourceObject = new CompilerTest.StringSourceJavaObject("Main",
- source);
- Iterable<? extends JavaFileObject> fileObjects = Arrays.asList(sourceObject);
- // 获取编译类根路径,不然会报找不到类的错误
- String path = Class.class.getClass().getResource("/").getPath();
- Iterable< String> options = Arrays.asList("-d", path);
- // 增加options参数
- // CompilationTask task = compiler.getTask(null, fileManager, null, null, null, fileObjects);
- CompilationTask task = compiler.getTask(null, fileManager, null, options, null, fileObjects);
- boolean result = task.call();
- if (result) {
- System.out.println("编译成功。");
- ClassLoader loader = CompilerTest.class.getClassLoader();
- try {
- Class<?> clazz = loader.loadClass("Main");
- Method method = clazz.getMethod("main", String[].class);
- // 修改调用参数,不然会报参数个数不对
- // Object value = method.invoke(null, new Object[] {});
- Object value = method.invoke(null, new Object[] {new String[]{}});
- System.out.println(value);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
- static class StringSourceJavaObject extends SimpleJavaFileObject {
- private String content = null;
- public StringSourceJavaObject(String name, String content) throws URISyntaxException {
- super(URI.create("string:///" + name.replace('.', '/') + Kind.SOURCE.extension),
- Kind.SOURCE);
- this.content = content;
- }
- public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
- return content;
- }
- }
- }