JAVA的動態編譯

動態編譯的兩種方式：

1.用jdk自帶的javac，需用到JDK的Tools.jar

JavaCompiler javac = ToolProvider.getSystemJavaCompiler();
int status = javac.run(null, null, null, "-encoding", "UTF-8", "-d", dstPath, javaFile);

編譯成功返回0

2.用ecj，需下載ecj包，可以從eclipse官網下載。eclipse、IntelliJ IDEA、Tomcat等都用它作爲Java編譯器

import org.eclipse.jdt.internal.compiler.batch.Main;

Main ecjCompiler = new Main(new PrintWriter(System.out), new PrintWriter(System.err),
                false/* systemExit */, null/* options */, null/* progress */);
String[] argv = {"-1.8", "-encoding", "utf-8", javaFile, "-d", dstPath};
boolean result = ecjCompiler.compile(argv);

編譯成功返回true

 

javaFile爲java文件的路徑，dstPath爲保存目錄