Validator |
提供了客戶端和服務器端的數據驗證框架. |
</tr>
</tbody>
</table>
1、BeanUtils
提供了對于JavaBean進行各種操作, 比如對象,屬性復制等等。
//1、 克隆對象
// 新創建一個普通Java Bean,用來作為被克隆的對象
public class Person {
private String name = "";
private String email = "";
private int age;
//省略 set,get方法
}
// 再創建一個Test類,其中在main方法中代碼如下:
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConvertUtils;
public class Test {
/**
* @param args
*/
public static void main(String[] args) {
Person person = new Person();
person.setName("tom");
person.setAge(21);
try {
//克隆
Person person2 = (Person)BeanUtils.cloneBean(person);
System.out.println(person2.getName()+">>"+person2.getAge());
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
}
}
// 原理也是通過Java的反射機制來做的。
// 2、 將一個Map對象轉化為一個Bean
// 這個Map對象的key必須與Bean的屬性相對應。
Map map = new HashMap();
map.put("name","tom");
map.put("email","tom@");
map.put("age","21");
//將map轉化為一個Person對象
Person person = new Person();
BeanUtils.populate(person,map);
// 通過上面的一行代碼,此時person的屬性就已經具有了上面所賦的值了。
// 將一個Bean轉化為一個Map對象了,如下:
Map map = BeanUtils.describe(person) </pre>
2、Betwixt
XML與Java對象之間相互轉換。
//1、 將JavaBean轉為XML內容
// 新創建一個Person類
public class Person{
private String name;
private int age;
/** Need to allow bean to be created via reflection */
public PersonBean() {
}
public PersonBean(String name, int age) {
this.name = name;
this.age = age;
}
//省略set, get方法
public String toString() {
return "PersonBean[name='" + name + "',age='" + age + "']";
}
}
//再創建一個WriteApp類:
import java.io.StringWriter;
import org.apache.commons.betwixt.io.BeanWriter;
public class WriteApp {
/**
* 創建一個例子Bean,并將它轉化為XML.
*/
public static final void main(String [] args) throws Exception {
// 先創建一個StringWriter,我們將把它寫入為一個字符串
StringWriter outputWriter = new StringWriter();
// Betwixt在這里僅僅是將Bean寫入為一個片斷
// 所以如果要想完整的XML內容,我們應該寫入頭格式
outputWriter.write(“<?xml version=’1.0′ encoding=’UTF-8′ ?>\n”);
// 創建一個BeanWriter,其將寫入到我們預備的stream中
BeanWriter beanWriter = new BeanWriter(outputWriter);
// 配置betwixt
// 更多詳情請參考java docs 或最新的文檔
beanWriter.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
beanWriter.getBindingConfiguration().setMapIDs(false);
beanWriter.enablePrettyPrint();
// 如果這個地方不傳入XML的根節點名,Betwixt將自己猜測是什么
// 但是讓我們將例子Bean名作為根節點吧
beanWriter.write(“person”, new PersonBean(“John Smith”, 21));
//輸出結果
System.out.println(outputWriter.toString());
// Betwixt寫的是片斷而不是一個文檔,所以不要自動的關閉掉writers或者streams,
//但這里僅僅是一個例子,不會做更多事情,所以可以關掉
outputWriter.close();
}
}
//2、 將XML轉化為JavaBean
import java.io.StringReader;
import org.apache.commons.betwixt.io.BeanReader;
public class ReadApp {
public static final void main(String args[]) throws Exception{
// 先創建一個XML,由于這里僅是作為例子,所以我們硬編碼了一段XML內容
StringReader xmlReader = new StringReader(
"<?xml version=’1.0′ encoding=’UTF-8′ ?> <person><age>25</age><name>James Smith</name></person>");
//創建BeanReader
BeanReader beanReader = new BeanReader();
//配置reader
beanReader.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
beanReader.getBindingConfiguration().setMapIDs(false);
//注冊beans,以便betwixt知道XML將要被轉化為一個什么Bean
beanReader.registerBeanClass("person", PersonBean.class);
//現在我們對XML進行解析
PersonBean person = (PersonBean) beanReader.parse(xmlReader);
//輸出結果
System.out.println(person);
}
}
3、Codec
提供了一些公共的編解碼實現,比如Base64, Hex, MD5,Phonetic and URLs等等。
//Base64編解碼
private static String encodeTest(String str){
Base64 base64 = new Base64();
try {
str = base64.encodeToString(str.getBytes("UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
System.out.println("Base64 編碼后:"+str);
return str;
}
private static void decodeTest(String str){
Base64 base64 = new Base64();
//str = Arrays.toString(Base64.decodeBase64(str));
str = new String(Base64.decodeBase64(str));
System.out.println("Base64 解碼后:"+str);
}
4、Collections
對java.util的擴展封裝,處理數據還是挺靈活的。
org.apache.commons.collections – Commons Collections自定義的一組公用的接口和工具類
org.apache.commons.collections.bag – 實現Bag接口的一組類
org.apache.commons.collections.bidimap – 實現BidiMap系列接口的一組類
org.apache.commons.collections.buffer – 實現Buffer接口的一組類
org.apache.commons.collections.collection – 實現java.util.Collection接口的一組類
org.apache.commons.collections.comparators – 實現java.util.Comparator接口的一組類
org.apache.commons.collections.functors – Commons Collections自定義的一組功能類
org.apache.commons.collections.iterators – 實現java.util.Iterator接口的一組類
org.apache.commons.collections.keyvalue – 實現集合和鍵/值映射相關的一組類
org.apache.commons.collections.list – 實現java.util.List接口的一組類
org.apache.commons.collections.map – 實現Map系列接口的一組類
org.apache.commons.collections.set – 實現Set系列接口的一組類
/**
* 得到集合里按順序存放的key之后的某一Key
*/
OrderedMap map = new LinkedMap();
map.put("FIVE", "5");
map.put("SIX", "6");
map.put("SEVEN", "7");
map.firstKey(); // returns "FIVE"
map.nextKey("FIVE"); // returns "SIX"
map.nextKey("SIX"); // returns "SEVEN"
/**
* 通過key得到value
* 通過value得到key
* 將map里的key和value對調
*/
BidiMap bidi = new TreeBidiMap();
bidi.put("SIX", "6");
bidi.get("SIX"); // returns "6"
bidi.getKey("6"); // returns "SIX"
// bidi.removeValue("6"); // removes the mapping
BidiMap inverse = bidi.inverseBidiMap(); // returns a map with keys and values swapped
System.out.println(inverse);
/**
* 得到兩個集合中相同的元素
*/
List<String> list1 = new ArrayList<String>();
list1.add("1");
list1.add("2");
list1.add("3");
List<String> list2 = new ArrayList<String>();
list2.add("2");
list2.add("3");
list2.add("5");
Collection c = CollectionUtils.retainAll(list1, list2);
System.out.println(c);
5、Compress
commons compress中的打包、壓縮類庫。
/創建壓縮對象
ZipArchiveEntry entry = new ZipArchiveEntry("CompressTest");
//要壓縮的文件
File f=new File("e:\\test.pdf");
FileInputStream fis=new FileInputStream(f);
//輸出的對象 壓縮的文件
ZipArchiveOutputStream zipOutput=new ZipArchiveOutputStream(new File("e:\\test.zip"));
zipOutput.putArchiveEntry(entry);
int i=0,j;
while((j=fis.read()) != -1)
{
zipOutput.write(j);
i++;
System.out.println(i);
}
zipOutput.closeArchiveEntry();
zipOutput.close();
fis.close();
6、Configuration
用來幫助處理配置文件的,支持很多種存儲方式。
1. Properties files
2. XML documents
3. Property list files (.plist)
4. JNDI
5. JDBC Datasource
6. System properties
7. Applet parameters
8. Servlet parameters
//舉一個Properties的簡單例子
# usergui.properties
colors.background = #FFFFFF
colors.foreground = #000080
window.width = 500
window.height = 300
PropertiesConfiguration config = new PropertiesConfiguration("usergui.properties");
config.setProperty("colors.background", "#000000);
config.save();
config.save("usergui.backup.properties);//save a copy
Integer integer = config.getInteger("window.width");
7、DBCP
(Database Connection Pool)是一個依賴Jakarta commons-pool對象池機制的數據庫連接池,Tomcat的數據源使用的就是DBCP。
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.commons.pool.ObjectPool;
import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.commons.dbcp.ConnectionFactory;
import org.apache.commons.dbcp.PoolingDataSource;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.DriverManagerConnectionFactory;
//官方示例
public class PoolingDataSources {
public static void main(String[] args) {
System.out.println("加載jdbc驅動");
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
System.out.println("Done.");
//
System.out.println("設置數據源");
DataSource dataSource = setupDataSource("jdbc:oracle:thin:@localhost:1521:test");
System.out.println("Done.");
//
Connection conn = null;
Statement stmt = null;
ResultSet rset = null;
try {
System.out.println("Creating connection.");
conn = dataSource.getConnection();
System.out.println("Creating statement.");
stmt = conn.createStatement();
System.out.println("Executing statement.");
rset = stmt.executeQuery("select * from person");
System.out.println("Results:");
int numcols = rset.getMetaData().getColumnCount();
while(rset.next()) {
for(int i=0;i<=numcols;i++) {
System.out.print("\t" + rset.getString(i));
}
System.out.println("");
}
} catch(SQLException e) {
e.printStackTrace();
} finally {
try { if (rset != null) rset.close(); } catch(Exception e) { }
try { if (stmt != null) stmt.close(); } catch(Exception e) { }
try { if (conn != null) conn.close(); } catch(Exception e) { }
}
}
public static DataSource setupDataSource(String connectURI) {
//設置連接地址
ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(
connectURI, null);
// 創建連接工廠
PoolableConnectionFactory poolableConnectionFactory = new PoolableConnectionFactory(
connectionFactory);
//獲取GenericObjectPool 連接的實例
ObjectPool connectionPool = new GenericObjectPool(
poolableConnectionFactory);
// 創建 PoolingDriver
PoolingDataSource dataSource = new PoolingDataSource(connectionPool);
return dataSource;
}
}
8、DbUtils
Apache組織提供的一個資源JDBC工具類庫,它是對JDBC的簡單封裝,對傳統操作數據庫的類進行二次封裝,可以把結果集轉化成List。,同時也不影響程序的性能。
DbUtils類:啟動類
ResultSetHandler接口:轉換類型接口
MapListHandler類:實現類,把記錄轉化成List
BeanListHandler類:實現類,把記錄轉化成List,使記錄為JavaBean類型的對象
Qrery Runner類:執行SQL語句的類
import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.List;
//轉換成list
public class BeanLists {
public static void main(String[] args) {
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/ptest";
String jdbcDriver = "com.mysql.jdbc.Driver";
String user = "root";
String password = "ptest";
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
List results = (List) qr.query(conn, "select id,name from person", new BeanListHandler(Person.class));
for (int i = 0; i < results.size(); i++) {
Person p = (Person) results.get(i);
System.out.println("id:" + p.getId() + ",name:" + p.getName());
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
}
}
public class Person{
private Integer id;
private String name;
//省略set, get方法
}
import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.MapListHandler;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
//轉換成map
public class MapLists {
public static void main(String[] args) {
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/ptest";
String jdbcDriver = "com.mysql.jdbc.Driver";
String user = "root";
String password = "ptest";
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
List results = (List) qr.query(conn, "select id,name from person", new MapListHandler());
for (int i = 0; i < results.size(); i++) {
Map map = (Map) results.get(i);
System.out.println("id:" + map.get("id") + ",name:" + map.get("name"));
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
}
}
9、Email
提供的一個開源的API,是對javamail的封裝。
//用commons email發送郵件
public static void main(String args[]){
Email email = new SimpleEmail();
email.setHostName("smtp.googlemail.com");
email.setSmtpPort(465);
email.setAuthenticator(new DefaultAuthenticator("username", "password"));
email.setSSLOnConnect(true);
email.setFrom("user@gmail.com");
email.setSubject("TestMail");
email.setMsg("This is a test mail ... :-)");
email.addTo("foo@bar.com");
email.send();
}
10、FileUpload
java web文件上傳功能。
Java代碼 收藏代碼
//官方示例:
//* 檢查請求是否含有上傳文件
// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
//現在我們得到了items的列表
//如果你的應用近于最簡單的情況,上面的處理就夠了。但我們有時候還是需要更多的控制。
//下面提供了幾種控制選擇:
// Create a factory for disk-based file items
DiskFileItemFactory factory = new DiskFileItemFactory();
// Set factory constraints
factory.setSizeThreshold(yourMaxMemorySize);
factory.setRepository(yourTempDirectory);
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// 設置最大上傳大小
upload.setSizeMax(yourMaxRequestSize);
// 解析所有請求
List /* FileItem */ items = upload.parseRequest(request);
// Create a factory for disk-based file items
DiskFileItemFactory factory = new DiskFileItemFactory(
yourMaxMemorySize, yourTempDirectory);
//一旦解析完成,你需要進一步處理item的列表。
// Process the uploaded items
Iterator iter = items.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (item.isFormField()) {
processFormField(item);
} else {
processUploadedFile(item);
}
}
//區分數據是否為簡單的表單數據,如果是簡單的數據:
// processFormField
if (item.isFormField()) {
String name = item.getFieldName();
String value = item.getString();
//...省略步驟
}
//如果是提交的文件:
// processUploadedFile
if (!item.isFormField()) {
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
boolean isInMemory = item.isInMemory();
long sizeInBytes = item.getSize();
//...省略步驟
}
//對于這些item,我們通常要把它們寫入文件,或轉為一個流
// Process a file upload
if (writeToFile) {
File uploadedFile = new File(...);
item.write(uploadedFile);
} else {
InputStream uploadedStream = item.getInputStream();
//...省略步驟
uploadedStream.close();
}
//或轉為字節數組保存在內存中:
// Process a file upload in memory
byte[] data = item.get();
//...省略步驟
//如果這個文件真的很大,你可能會希望向用戶報告到底傳了多少到服務端,讓用戶了解上傳的過程
//Create a progress listener
ProgressListener progressListener = new ProgressListener(){
public void update(long pBytesRead, long pContentLength, int pItems) {
System.out.println("We are currently reading item " + pItems);
if (pContentLength == -1) {
System.out.println("So far, " + pBytesRead + " bytes have been read.");
} else {
System.out.println("So far, " + pBytesRead + " of " + pContentLength
+ " bytes have been read.");
}
}
};
upload.setProgressListener(progressListener);
11、HttpClient
基于HttpCore實 現的一個HTTP/1.1兼容的HTTP客戶端,它提供了一系列可重用的客戶端身份驗證、HTTP狀態保持、HTTP連接管理module。
//GET方法
import java.io.IOException;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
public class GetSample{
public static void main(String[] args) {
// 構造HttpClient的實例
HttpClient httpClient = new HttpClient();
// 創建GET方法的實例
GetMethod getMethod = new GetMethod("http://www.ibm.com");
// 使用系統提供的默認的恢復策略
getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler());
try {
// 執行getMethod
int statusCode = httpClient.executeMethod(getMethod);
if (statusCode != HttpStatus.SC_OK) {
System.err.println("Method failed: "
+ getMethod.getStatusLine());
}
// 讀取內容
byte[] responseBody = getMethod.getResponseBody();
// 處理內容
System.out.println(new String(responseBody));
} catch (HttpException e) {
// 發生致命的異常,可能是協議不對或者返回的內容有問題
System.out.println("Please check your provided http address!");
e.printStackTrace();
} catch (IOException e) {
// 發生網絡異常
e.printStackTrace();
} finally {
// 釋放連接
getMethod.releaseConnection();
}
}
}
//POST方法
import java.io.IOException;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
public class PostSample{
public static void main(String[] args) {
// 構造HttpClient的實例
HttpClient httpClient = new HttpClient();
// 創建POST方法的實例
String url = "http://www.oracle.com/";
PostMethod postMethod = new PostMethod(url);
// 填入各個表單域的值
NameValuePair[] data = { new NameValuePair("id", "youUserName"),
new NameValuePair("passwd", "yourPwd") };
// 將表單的值放入postMethod中
postMethod.setRequestBody(data);
// 執行postMethod
int statusCode = httpClient.executeMethod(postMethod);
// HttpClient對于要求接受后繼服務的請求,象POST和PUT等不能自動處理轉發
// 301或者302
if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY ||
statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
// 從頭中取出轉向的地址
Header locationHeader = postMethod.getResponseHeader("location");
String location = null;
if (locationHeader != null) {
location = locationHeader.getValue();
System.out.println("The page was redirected to:" + location);
} else {
System.err.println("Location field value is null.");
}
return;
}
}
}
12、IO
對java.io的擴展 操作文件非常方便。
//1.讀取Stream
//標準代碼:
InputStream in = new URL( "http://jakarta.apache.org" ).openStream();
try {
InputStreamReader inR = new InputStreamReader( in );
BufferedReader buf = new BufferedReader( inR );
String line;
while ( ( line = buf.readLine() ) != null ) {
System.out.println( line );
}
} finally {
in.close();
}
//使用IOUtils
InputStream in = new URL( "http://jakarta.apache.org" ).openStream();
try {
System.out.println( IOUtils.toString( in ) );
} finally {
IOUtils.closeQuietly(in);
}
//2.讀取文件
File file = new File("/commons/io/project.properties");
List lines = FileUtils.readLines(file, "UTF-8");
//3.察看剩余空間
long freeSpace = FileSystemUtils.freeSpace("C:/");
13、Lang
主要是一些公共的工具集合,比如對字符、數組的操作等等。

// 1 合并兩個數組: org.apache.commons.lang. ArrayUtils
// 有時我們需要將兩個數組合并為一個數組,用ArrayUtils就非常方便,示例如下:
private static void testArr() {
String[] s1 = new String[] { "1", "2", "3" };
String[] s2 = new String[] { "a", "b", "c" };
String[] s = (String[]) ArrayUtils.addAll(s1, s2);
for (int i = 0; i < s.length; i++) {
System.out.println(s[i]);
}
String str = ArrayUtils.toString(s);
str = str.substring(1, str.length() - 1);
System.out.println(str + ">>" + str.length());
}
//2 截取從from開始字符串
StringUtils.substringAfter("SELECT * FROM PERSON ", "from");
//3 判斷該字符串是不是為數字(0~9)組成,如果是,返回true 但該方法不識別有小數點和 請注意。
StringUtils.isNumeric("454534"); //返回true
//4.取得類名
System.out.println(ClassUtils.getShortClassName(Test.class));
//取得其包名
System.out.println(ClassUtils.getPackageName(Test.class));
//5.NumberUtils
System.out.println(NumberUtils.stringToInt("6"));
//6.五位的隨機字母和數字
System.out.println(RandomStringUtils.randomAlphanumeric(5));
//7.StringEscapeUtils
System.out.println(StringEscapeUtils.escapeHtml("<html>"));
//輸出結果為<html>
System.out.println(StringEscapeUtils.escapeJava("String"));
//8.StringUtils,判斷是否是空格字符
System.out.println(StringUtils.isBlank(" "));
//將數組中的內容以,分隔
System.out.println(StringUtils.join(test,","));
//在右邊加下字符,使之總長度為6
System.out.println(StringUtils.rightPad("abc", 6, 'T'));
//首字母大寫
System.out.println(StringUtils.capitalize("abc"));
//Deletes all whitespaces from a String 刪除所有空格
System.out.println( StringUtils.deleteWhitespace(" ab c "));
//判斷是否包含這個字符
System.out.println( StringUtils.contains("abc", "ba"));
//表示左邊兩個字符
System.out.println( StringUtils.left("abc", 2));
System.out.println(NumberUtils.stringToInt("33"));
14、Logging
提供的是一個Java 的日志接口,同時兼顧輕量級和不依賴于具體的日志實現工具。
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class CommonLogTest {
private static Log log = LogFactory.getLog(CommonLogTest.class);
//日志打印
public static void main(String[] args) {
log.error("ERROR");
log.debug("DEBUG");
log.warn("WARN");
log.info("INFO");
log.trace("TRACE");
System.out.println(log.getClass());
}
}
15、Validator
通用驗證系統,該組件提供了客戶端和服務器端的數據驗證框架。
驗證日期
// 獲取日期驗證
DateValidator validator = DateValidator.getInstance();
// 驗證/轉換日期
Date fooDate = validator.validate(fooString, "dd/MM/yyyy");
if (fooDate == null) {
// 錯誤 不是日期
return;
}
表達式驗證
// 設置參數
boolean caseSensitive = false;
String regex1 = "^([A-Z]*)(?:\\-)([A-Z]*)*$"
String regex2 = "^([A-Z]*)$";
String[] regexs = new String[] {regex1, regex1};
// 創建驗證
RegexValidator validator = new RegexValidator(regexs, caseSensitive);
// 驗證返回boolean
boolean valid = validator.isValid("abc-def");
// 驗證返回字符串
String result = validator.validate("abc-def");
// 驗證返回數組
String[] groups = validator.match("abc-def");
配置文件中使用驗證
<form-validation>
<global>
<validator name="required"
classname="org.apache.commons.validator.TestValidator"
method="validateRequired"
methodParams="java.lang.Object, org.apache.commons.validator.Field"/>
</global>
<formset>
</formset>
</form-validation>
添加姓名驗證.
<form-validation>
<global>
<validator name="required"
classname="org.apache.commons.validator.TestValidator"
method="validateRequired"
methodParams="java.lang.Object, org.apache.commons.validator.Field"/>
</global>
<formset>
<form name="nameForm">
<field property="firstName" depends="required">
<arg0 key="nameForm.firstname.displayname"/>
</field>
<field property="lastName" depends="required">
<arg0 key="nameForm.lastname.displayname"/>
</field>
</form>
</formset>
</form-validation>
驗證類
Excerpts from org.apache.commons.validator.RequiredNameTest
//加載驗證配置文件
InputStream in = this.getClass().getResourceAsStream("validator-name-required.xml");
ValidatorResources resources = new ValidatorResources(in);
//這個是自己創建的bean 我這里省略了
Name name = new Name();
Validator validator = new Validator(resources, "nameForm");
//設置參數
validator.setParameter(Validator.BEAN_PARAM, name);
Map results = null;
//驗證
results = validator.validate();
if (results.get("firstName") == null) {
//驗證成功
} else {
//有錯誤 int errors = ((Integer)results.get("firstName")).intValue();
}
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