定义一个类，通过反射机制来set参数值public class Dept {    private String deptCode;    public String getDeptCode() {        return deptCode;    }    public void setDeptCode(String deptCode) {        this.deptCode = deptCode;    }   public static void main(String[] args) {        Dept dept = new Dept();        Class c = dept.getClass();        try {            Method setDepartmentCode = c.getMethod("setDeptCode",String.class);  // 根据方法名称，参数类型获取到方法对象            setDepartmentCode.invoke(dept,"2000");  // 第一个参数为类对象，后面的值为参数值，没有参数是为null            System.out.println(dept.getDeptCode());        } catch (NoSuchMethodException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        } catch (InvocationTargetException e) {            e.printStackTrace();        }    }}