我正在尝试测试Apache-commons配置库用户指南中有关声明和创建bean的a very simple example。我几乎逐字地复制了示例中的代码,但是我得到了一个ConfigurationRuntimeException(在克服了另一个异常之后,请参阅this question)。
以下是我正在使用的xml文件 - windowcongif.xml
:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<config>
<gui>
<windowManager config-class="test.DefaultWindowManager"
closable="false" resizable="true" defaultWidth="400"
defaultHeight="250">
</windowManager>
</gui>
</config>
以下是文件WindowManager.java
中的代码:
package test;
public interface WindowManager {}
以下是文件DefaultWindowManager.java
中的代码:
package test;
public class DefaultWindowManager implements WindowManager {
private boolean resizable;
private boolean closable;
private int defaultWidth;
private int defaultHeight;
}
以下是文件Main.java
中的代码:
package test;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.XMLConfiguration;
import org.apache.commons.configuration.beanutils.BeanDeclaration;
import org.apache.commons.configuration.beanutils.BeanHelper;
import org.apache.commons.configuration.beanutils.XMLBeanDeclaration;
import org.apache.commons.beanutils.PropertyUtils;
public class Main {
public static void main(String[] args) throws ConfigurationException {
XMLConfiguration config = new XMLConfiguration("windowconfig.xml");
BeanDeclaration decl = new XMLBeanDeclaration(config, "gui.windowManager");
WindowManager wm = (WindowManager) BeanHelper.createBean(decl);
}
}
以下是运行时的输出:
Exception in thread "main" org.apache.commons.configuration.ConfigurationRuntimeException: org.apache.commons.configuration.ConfigurationRuntimeException: Property defaultHeight cannot be set on test.DefaultWindowManager
at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:341)
at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:358)
at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:372)
at test.Main.main(Main.java:24)
Caused by: org.apache.commons.configuration.ConfigurationRuntimeException: Property defaultHeight cannot be set on test.DefaultWindowManager
at org.apache.commons.configuration.beanutils.BeanHelper.initProperty(BeanHelper.java:271)
at org.apache.commons.configuration.beanutils.BeanHelper.initBeanProperties(BeanHelper.java:229)
at org.apache.commons.configuration.beanutils.BeanHelper.initBean(BeanHelper.java:166)
at org.apache.commons.configuration.beanutils.DefaultBeanFactory.initBeanInstance(DefaultBeanFactory.java:108)
at org.apache.commons.configuration.beanutils.DefaultBeanFactory.createBean(DefaultBeanFactory.java:64)
at org.apache.commons.configuration.beanutils.BeanHelper.createBean(BeanHelper.java:336)
... 3 more
如何使这个简单的示例有效?
我正在使用commons-configuration软件包的1.9版本和commons-beanutils软件包的1.8.3版本,在将依赖项放在pom.xml
文件和版本1.7之后由IntelliJ IDEA自动导入。在Windows 8 64bit上运行的java的0_17。
答案 0 :(得分:4)
如果您使用的是JavaBeans,则需要为要设置的每个字段添加一个setter。
我建议在IntelliJ中为这些字段添加setter and getter
。
示例说明
// getters and setters ommitted, also the WindowManager methods