java - Groovy 类加载器不会加载 Java 类

Question

我在 .groovy 文件中编写了这个 groovy 脚本:

import groovy.sql.Sql;
def doit() {
    Class.forName('oracle.jdbc.driver.OracleDriver'); // If i skip this line it throws SQLException no driver registered for URL
    def db = [url:'jdbc:oracle:thin:/@localhost:1555:AVDB', user:'sys as sysdba', password:'secret',driver:'oracle.jdbc.driver.OracleDriver'];
    def sql = Sql.newInstance(db.url, db.user, db.password, db.driver) ;
    sql.execute 'CREATE USER RandomUser identified by Secret123';
}

我通过以下方式从 Java 调用上面的 Groovy:

ClassLoader parent = getClass().getClassLoader();
GroovyClassLoader loader = new GroovyClassLoader(parent);

Class groovyClass = loader.parseClass(groovySource); // groovySource is a File object pointing to .groovy file
GroovyObject groovyObject = (GroovyObject) groovyClass.newInstance();
Object[] args = {};
groovyObject.invokeMethod("doit", args);

问题:

类oracle.jdbc.driver.OracleDriver存在于Java的类路径中，但groovy无法在以下行找到它:Class.forName('oracle.jdbc.driver.OracleDriver');

抛出 ClassNotFoundException。

Answer 1

在常规方法之前尝试魔法线:

@groovy.transform.CompileStatic
def doit(){....}