通用验证系统

            <form-validation> 
	<global>      
		<validator name="int" 
			classname="org.i505.validator.MyTypeValidator" 
			method="validateInt"    
			methodParams="java.lang.Object,org.apache.commons.validator.Field"
			msg="errors.int"/>    
		<validator name="required"        
			classname="org.i505.validator.MyValidator"  
			method="validateRequired"           
			methodParams="java.lang.Object,org.apache.commons.validator.Field"    
<!---->			msg="errors.required"/> 
	</global>
<formset> 
<form name="nameForm"> 
	<field property="username"  depends="required">    
		<arg0 key="nameForm.username.displayname"/>    
	</field>    
	<field  property="age" depends="required,int">       
		<arg0 key="nameForm.age.displayname"/>      
	</field>  
</form> 
</formset>  
</form-validation>

          

            # validatoraction对象的消息
errors.required=必须提供{0}字段！
errors.int= {0}字段必须是整数！
# nameForm输入表单的各个输入数据的显示信息
nameForm.username.displayname=姓名
nameForm.age.displayname=年龄

          

            package org.i505.validator;import 
org.apache.commons.validator.Field;
import org.apache.commons.validator.GenericTypeValidator;
import org.apache.commons.validator.ValidatorUtil;
public class MyTypeValidator { 
	public static Integer validateInt(Object bean, Field field) {   
		String value = ValidatorUtil.getValueAsString(bean, field.getProperty());
		Integer x= GenericTypeValidator.formatInt(value);   
		return x;   
	}
}                                                        

          

            package org.i505.validator;
import org.apache.commons.validator.Field;
import org.apache.commons.validator.GenericValidator;
import org.apache.commons.validator.ValidatorUtil;  
public class MyValidator {            
	public static boolean validateRequired(Object bean, Field field) {  
		String value = ValidatorUtil.getValueAsString(bean, field.getProperty()); 
		return !GenericValidator.isBlankOrNull(value);  
	}
}                                                         

          

            public class ValidateBean extends Object {
	String username;String age;  
	public void setUsername (String username) {
		this. username = username;   
	}   
	public String getUsername () {
		return this.username;  
	}   
	public void setAge (String age) {
		this.age = age; 
	} 
	public String getAge () {	
		return this.age;  
	} 
	public String toString() {
		return "{ username =" + this.username + ", age=" + this.age + "}";   
	}
}

          

            public static void main(String[] args) throws IOException, ValidatorException {   
	InputStream in = null;  
	try {        
		ValidatorResources resources = new ValidatorResources();       
		in = ValidateExample.class.getResourceAsStream("myvalidator-example.xml");   
<!---->		ValidatorResourcesInitializer.initialize(resources, in);      
		ValidateBean bean = new ValidateBean();           
		Validator validator = new Validator(resources, "nameForm");   
		validator.addResource(Validator.BEAN_KEY, bean);       
		ValidatorResults results = null;          
		results = validator.validate();       
		printResults(bean, results, resources);   
		bean.setUsername("龚永生");           
		bean.setAge("很年轻");          
		results = validator.validate();  
		printResults(bean, results, resources);   
		bean.setAge("28");    
		results = validator.validate();   
		printResults(bean, results, resources);    
	}
	finally {     
		if (in != null) { 
			in.close();     
		}
	}
}

          

            private static ResourceBundle apps =    
	ResourceBundle.getBundle(      
	     "org.i505.validator.myapplicationResources");  
		 public static void printResults(     
			ValidateBean bean,     
			ValidatorResults results,    
			ValidatorResources resources) {   
				boolean success = true;  
				Form form = resources.get(Locale.getDefault(), "nameForm");  
<!---->				System.out.println("\n\n验证:");   
				System.out.println(bean);  
				Iterator propertyNames = results.get();    
				while (propertyNames.hasNext()) {    
					String propertyName = (String) propertyNames.next();      
<!---->					Field field = (Field) form.getFieldMap().get(propertyName);  
<!---->					String prettyFieldName = getGBKMsg(apps.getString(field.getArg0().getKey()));   
<!---->					ValidatorResult result = results.getValidatorResult(propertyName);    
<!---->					Map actionMap = result.getActionMap();     
					Iterator keys = actionMap.keySet().iterator();   
					while (keys.hasNext()) {      
						String actName = (String) keys.next();      
<!---->						ValidatorAction action = resources.getValidatorAction(actName);          
<!---->						System.out.println(         
						propertyName                 
						+ "["                   
						+ actName               
						+ "] ("               
						+ (result.isValid(actName) ? "验证通过" : "验证失败")     
<!---->						+ ")");       
					if (!result.isValid(actName)) {    
						success = false;               
						String message = getGBKMsg(apps.getString(action.getMsg()));     
<!---->						Object[] args = { prettyFieldName };             
<!---->						System.out.println(                
							"错误信息是: "                   
							+ MessageFormat.format(message, args));     
<!---->							}     
						}       
					}    
					if (success) {   
						System.out.println("表单验证通过"); 
					}
					else {
						System.out.println("表单验证失败"); 
					}
				}   
				public static String getGBKMsg(String msg){   
					String gbkStr="";    
					try {		
						gbkStr=new String(msg.getBytes("iso-8859-1"),"gbk");	
<!---->					}
					catch (UnsupportedEncodingException e) {	
						// TODO Auto-generated catch block		
<!---->						e.printStackTrace();	
					}	
					return gbkStr; 
				}

          

            验证:{ username =null, age=null}
age[required] (验证失败)错误信息是: 必须提供年龄字段！
username[required] (验证失败)错误信息是: 必须提供姓名字段！
表单验证失败
验证:{ username =龚永生, age=很年轻}
age[required] (验证通过)
age[int] (验证失败)
错误信息是: 年龄字段必须是整数！
username[required] (验证通过)表单验证失败
验证:{ username =龚永生, age=28}
age[required] (验证通过)
age[int] (验证通过)
username[required] (验证通过)
表单验证通过

          

            <validator name="int"     
	classname="org.i505.validator.MyTypeValidator"  
	method="validateInt"        
	methodParams="java.lang.Object,org.apache.commons.validator.Field" 
	msg="errors.int"/>

          

            // Add these two Objects to the resources since they reference  
	// the current validator action and field   
	hResources.put(VALIDATOR_ACTION_KEY, va);   
	hResources.put(FIELD_KEY, field);      
	Class c = getClassLoader().loadClass(va.getClassname());   
	List lParams = va.getMethodParamsList();       
	int size = lParams.size();      
	int beanIndexPos = -1;      
	int fieldIndexPos = -1;    
	Class[] paramClass = new Class[size];          
	Object[] paramValue = new Object[size];       
	for (int x = 0; x < size; x++) {            
		String paramKey = (String) lParams.get(x); 
		if (BEAN_KEY.equals(paramKey)) {         
			beanIndexPos = x;         
		}       
		if (FIELD_KEY.equals(paramKey)) {     
			fieldIndexPos = x;                
		}
		// There were problems calling getClass on paramValue[]      
		paramClass[x] = getClassLoader().loadClass(paramKey);    
		paramValue[x] = hResources.get(paramKey);       
	}       
	Method m = c.getMethod(va.getMethod(), paramClass);     
	// If the method is static we don't need an instance of the class    
	// to call the method.  If it isn't, we do.        
	if (!Modifier.isStatic(m.getModifiers())) {       
		try {              
			if (va.getClassnameInstance() == null) {    
				va.setClassnameInstance(c.newInstance());    
			}
		} 
		catch (Exception ex) {           
			log.error(                 
				"Couldn't load instance "         
				+ "of class "                 
				+ va.getClassname()          
				+ ".  "                 
				+ ex.getMessage());     
			}
		}
		Object result = null;           
		if (field.isIndexed()) {        
			Object oIndexed =           
				PropertyUtils.getProperty(   
				hResources.get(BEAN_KEY),     
				field.getIndexedListProperty());   
				Object indexedList[] = new Object[0]; 
				if (oIndexed instanceof Collection) {  
					indexedList = ((Collection) oIndexed).toArray();   
<!---->				}
				else if (oIndexed.getClass().isArray()) {  
					indexedList = (Object[]) oIndexed;      
				}   
				// Set current iteration object to the parameter array      
<!---->				paramValue[beanIndexPos] = indexedList[pos];   
				// Set field clone with the key modified to represent     
				// the current field           
				Field indexedField = (Field) field.clone();          
				indexedField.setKey(                
				ValidatorUtil.replace(          
					indexedField.getKey(),      
					Field.TOKEN_INDEXED,        
					"[" + pos + "]"));  
					paramValue[fieldIndexPos] = indexedField;     
					result = m.invoke(va.getClassnameInstance(), paramValue);       
<!---->					results.add(field, va.getName(), isValid(result), result);      
<!---->					if (!isValid(result)) {           
						return false;              
					}
				}
				else {         
					result = m.invoke(va.getClassnameInstance(), paramValue);        
<!---->					results.add(field, va.getName(), isValid(result), result);   
<!---->					if (!isValid(result)) {             
						return false;                
					}
				}