011 - 自定义converter
1. 自定义converter
1) 从DefaultTypeConverter继承,重写convertValue()方法
public class MyPointConverter extends DefaultTypeConverter{
@Override
public Object convertValue(Object value, Class toType) {
if(toType == Point.class) {
Point p = new Point();
String[] strs = (String[])value;
String[] xy = strs[0].split(",");
p.x = Integer.parseInt(xy[0]);
p.y = Integer.parseInt(xy[1]);
return p;
}
if(toType == String.class) {
return value.toString();
}
return super.convertValue(value, toType);
}
}
2) 从StrutsTypeConverter继承，重写convertFromString()和convertToString()方法
//MyPointConverter.java
public class MyPointConverter extends StrutsTypeConverter{
public Object convertFromString(Map context, String[] values, Class toClass) {
Point p = new Point();
String[] strs = (String[])values;
String[] xy = strs[0].split(",");
p.x = Integer.parseInt(xy[0]);
p.y = Integer.parseInt(xy[1]);
return p;
}
public String convertToString(Map context, Object o) {
return o.toString();
}
}
2. 注册方式：
1）局部：XxxAction-conversion.properties(与XxxAction放一起,-conversion.properties是固定的）
内容：p（Action的属性名称） = converter （如:p=edu.ray.converter.MyConverter)
2）全局：xwork-conversion.properties(放到src目录下，同样,-conversion.properties是固定的)
内容:com.xxx.XXX（类名）= converter (如:edu.ray.model.Point=edu.ray.converter.MyConverter)
3. 参数传递
如：
Map : userMap['key']=value
List : users[0].name=XXX
Point: p=2,3 & p=3,5