java - 创建动态 POJO 并为其设置值

Question

final Map<String, Class<?>> properties = new HashMap<String, Class<?>>();
properties.put("jobName", String.class);
properties.put("companyName", String.class);
properties.put("totalApplicantForJob", String.class);        
final Class<?> beanClass = createBeanClass("ApplicantCountVsJobBoards", properties);

public static Class<?> createBeanClass (final String className, final Map<String, Class<?>> properties) {
    final BeanGenerator beanGenerator = new BeanGenerator();
    // NamingPolicy policy = 
    //beanGenerator.setNamingPolicy(null);
    BeanGenerator.addProperties(beanGenerator, properties);
    return (Class<?>) beanGenerator.createClass();
}

如何向这些类对象添加值。

Answer 1

cglib 的 BeanGenerator 不仅生成动态类，还添加访问器方法。那么像这样进行反射方法调用怎么样:

Object instance = beanClass.newInstance(); // Creates a new object of your dynamic class
Method setJobName = beanClass.getMethod("setJobName", String.class); // Gets the setJobName method that takes one String argument
method.invoke(instance, "Super Cool Job");

您的 Bean 现在已(部分)填充。

可能还有更有效的方法，这只是为了向您展示概念。