utils.java

tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛

/*
 * 作者: 胡李青
 * qq: 31703299
 * Copyright (c) 2007 huliqing
 * 主页 http://www.tbuy.biz/
 * 你可以免费使用该软件，未经许可请勿作用于任何商业目的,如有技术问题请与本人联系！
 */

package biz.tbuy.common;

import java.util.Locale;
import java.util.ResourceBundle;
import java.util.MissingResourceException;
import java.text.MessageFormat;
import javax.faces.context.FacesContext;
import javax.faces.application.FacesMessage;

/**
 * @author huliqing
 * <p><b>qq：</b>31703299
 * <p><b>E-mail：</b><a href="mailto:[e-mail]">[e-mail]</a>
 * <p><b>Homepage：</b><a href="http://www.tbuy.biz/">http://www.tbuy.biz/</a>
 */
public class Utils {
    /** Creates a new instance of Utils */
    public Utils() {
    }

    //*************************************************************************/
    protected static ClassLoader getCurrentClassLoader(Object defaultObject) {
        ClassLoader loader = Thread.currentThread().getContextClassLoader();
        if (loader == null) {
            loader = defaultObject.getClass().getClassLoader();
        }
        return loader;
    }
    
    /**
     * 获取locale信息
     * @return locale
     */
    public static Locale getLocale() {
        return FacesContext.getCurrentInstance().getViewRoot().getLocale();
    }
    
    /**
     * 从资源束中获取指定的带有格式化的字符串
     * @param bundleName 
     * @param id 
     * @param params 
     * @return text 
     */
    public static String getDisplayString (String bundleName, 
                    String id, 
                    Object[] params) {
        String text = null;
        ResourceBundle bundle;
        try {
            bundle = ResourceBundle.getBundle(bundleName, getLocale(),
                            getCurrentClassLoader(params));
        } catch (Exception e) {
            return id;
        }
        try {
            text = bundle.getString(id);
        } catch (MissingResourceException e) {
            text = "[" + id + "]";
        }
        if (params != null) {
            MessageFormat mf = new MessageFormat(text, getLocale());
            text = mf.format(params, new StringBuffer(), null).toString();
        }
        return text;
    }

    /*************************************************************************/
    public static void addMessage(String type, String bundleName, String id, Object[] params) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        String summary = getDisplayString(Constants.BUNDLE, type, null);
        String detail = getDisplayString(bundleName, id, params);
        FacesMessage message = null;
        if (type.equals("Info")) {
            message = new FacesMessage(FacesMessage.SEVERITY_INFO, summary, detail);
        } else if(type.equals("Warn")) { 
            message = new FacesMessage(FacesMessage.SEVERITY_WARN, summary, detail);
        } else if (type.equals("Error")) {
            message = new FacesMessage(FacesMessage.SEVERITY_ERROR, summary, detail);
        } else if (type.equals("Fatal")) {
            message = new FacesMessage(FacesMessage.SEVERITY_FATAL, summary, detail);
        }
        facesContext.addMessage(null, message);
    }
    /**
     * @param bundleName 
     * @param id 
     * @param params 
     */
    public static void addInfoMessage(String bundleName, String id, Object[] params) {
        addMessage("Info", bundleName, id, params);
    }
    public static void addWarnMessage(String bundleName, String id, Object[] params) {
        addMessage("Warn", bundleName, id, params);
    }
    public static void addErrorMessage(String bundleName, String id, Object[] params) {
        addMessage("Error", bundleName, id, params);
    }
    public static void addFatalMessage(String bundleName, String id, Object[] params) {
        addMessage("Fatal", bundleName, id, params);
    }
    
    /**
     * @param bundleName 资源束名称
     * @param id 要从资源束中获取的字符串的id
     */
    public static void addInfoMessage(String bundleName, String id) {
        addMessage("Info", bundleName, id, null);
    }
    public static void addWarnMessage(String bundleName, String id) {
        addMessage("Warn", bundleName, id, null);
    }
    public static void addErrorMessage(String bundleName, String id) {
        addMessage("Error", bundleName, id, null);
    }
    public static void addFatalMessage(String bundleName, String id) {
        addMessage("Fatal", bundleName, id, null);
    }
}