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copied!<p>I'd say it depends on what kind of object the actual <code>domainObject</code> is. If it's a bean, you could use an reflection based automated bean populator such as my <a href="http://code.google.com/p/bean-property-controller/" rel="nofollow noreferrer">BeanPropertyController</a> <em>(it's free so give it a try! License is <a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="nofollow noreferrer">ASF2.0</a>)</em> to do the following:</p> <pre><code>/* Assumed parameter input: * a=hello * c=123 * e=f,g,h * * Matching bean: */ public class ParamBean { private String a; private int c; private String[] e; /* + all the normal getters and setters you'd see in a bean */ } /* somewhere in your servlet: */ BeanPropertyController bpc = BeanPropertyController.of(ParamBean.class); for (Entry<String, String[]> entry : request.getParameterMap().entrySet()) { bpc.mutate(entry.getKey(), getNiceValue(entry.getValue(), bpc.typeOf(entry.getKey())); } ParamBean bean = bpc.getObject(ParamBean.class); /* somewhere else in the class */ public Object getNiceValue(String[] objs, Class<?> desiredClass) { if (objs.length == 1) { Object o = objs[0]; return convertString(o); } else { Object[] newObjs = Object[objs.length]; for (int i=0;i<objs.length;i++) { newObjs[i] = convertString(objs[i]); } return (Object) newObjs; } } private Object convertString(String value, Class<> desiredClass) { if (Number.class.isAssignableFrom(desiredClass)) { Double d = null; try { d = Double.parseDouble(value) } catch (NumberFormatException e) { // Not of the desired type, do whatever you want } if (Double.class.isAssignableFrom(desiredClass)) { return d; } else if (Long.class.isAssignableFrom(desiredClass)) { return d.longValue(); } else if (Integer.class.isAssignableFrom(desiredClass)) { return d.intValue(); } // and so on... } else if (Boolean.class.isAssignableFrom(desiredClass)) { try { return Boolean.valueOf(value); } catch (NullPointerException e) { // Not of the desired type, do whatever you want } } else { return value; // or whatever your default type is } } </code></pre>

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