如何使用BeanUtils.populate方法将String []转换为ArrayList?它看起来像我可以使用ArrayConverter类,但我很难找到解释如何做到这一点。如何使用BeanUtils.populate方法将String []转换为ArrayList <String>?
下面是一些测试代码,我创建:
public class TestAction {
public static TestBean testPopulate() throws IllegalAccessException, InvocationTargetException {
HashMap<String, Object> map = new HashMap<String, Object>();
TestBean bean = new TestBean();
String[] names = {"teststring","testboolean","testinteger","testarray"};
String[] array = {"hi","bye"};
Object[] values = {"TEST","","100",array};
int i = 0;
while (i < names.length) {
String name = names[i];
map.put(name, values[i]);
i++;
}
BeanUtils.populate(bean, map);
return bean;
}
public static void main(String[] args) {
try {
TestBean bean = testPopulate();
System.out.println(bean.getTeststring() + " " + bean.getTestinteger() + " " + bean.getTeststring() + " " + bean.isTestboolean());
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public class TestBean {
private String teststring;
private boolean testboolean;
private int testinteger;
private ArrayList<String> testarray;
public String getTeststring() {
return teststring;
}
public void setTeststring(String teststring) {
this.teststring = teststring;
}
public boolean isTestboolean() {
return testboolean;
}
public void setTestboolean(boolean testboolean) {
this.testboolean = testboolean;
}
public int getTestinteger() {
return testinteger;
}
public void setTestinteger(int testinteger) {
this.testinteger = testinteger;
}
public ArrayList<String> getTestarray() {
return testarray;
}
public void setTestarray(ArrayList<String> testarray) {
this.testarray = testarray;
}
}
我传递一个字符串[]类型期待它知道如何转换为ArrayList中,但它失败。
好吧,我现在明白了。我将String []更改为ArrayList,并且代码没有错误地运行。从String []转换为ArrayList 时,BeanUtils故意失败。作为Java中的HttpServletRequest类返回String或String []类型的后续问题,那么是否强制我在我的bean中仅使用基本类型和String []类型? –
user2191540
2013-03-23 22:42:00
“HttpServletRequest”的哪个方法?它并不强迫你,但是,如果在bean中传递的数据类型是一个String [],那么在你的bean中使用数组可能是有意义的,然后当它们转换为List对象时你需要。或者,做一些预处理。在将映射传递给BeanUtils.populate之前,请构建要使用的'List'对象,并将其放入映射中。 – dimo414 2013-03-23 22:54:59
啊...预处理是一个好主意,我会尝试一下。感谢您的建议。 – user2191540 2013-03-23 23:42:52