NC客户化开发手册（中级篇）[1](4)

(cubasdoc.getLockpks(),

}

cubasdoc.getUserid(), \

// 更新 if (islock) { } // 异常 else { }

throw new nc.vo.pub.BusinessException try { }

getCubasdocDMO().updateForEx(cubasdoc); // 释放锁

PKLock.getInstance().releaseBatchLock

cubasdoc.getUserid(), \

} finally {

(cubasdoc.getLockpks(),

(nc.vo.bd.BDMsg.MSG_LOCKED());

1.8.3 附件管理功能实现

import java.awt.Container; import java.awt.Frame; import java.io.File; import nc.ui.ml.NCLangRes;

import nc.ui.pub.beans.MessageDialog; import nc.ui.pub.beans.UIFileChooser; import nc.ui.pub.beans.util.NCOptionPane; import nc.ui.pub.filemanager.FileManagerDialog; import nc.ui.pub.filemanager.FileManagerUtil; @SuppressWarnings(\

public class MyFileManagerDialog extends FileManagerDialog {

private int iMaxAttachmentSize = 5 * 1024 * 1024;// 上传附件的大小限制在5M private int iMaxCount = 5; //上传附件的个数限制在5个 //构造函数

public MyFileManagerDialog() { super(); }

public MyFileManagerDialog(String[] dirs, String[] dirShowNames) {

super(dirs, dirShowNames); }

public MyFileManagerDialog(Container parent, String[] dirs, String[] dirShowNames)

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{

super(parent, dirs, dirShowNames); }

public MyFileManagerDialog(Container parent, String title, String[] dirs, String[] dirShowNames) {

super(parent, title, dirs, dirShowNames); }

public MyFileManagerDialog(Frame owner, String[] dirs, String[] dirShowNames) {

super(owner, dirs, dirShowNames); }

public MyFileManagerDialog(Frame owner, String title, String[] dirs, String[] dirShowNames) {

super(owner, title, dirs, dirShowNames); }

protected void onFileUpload() {

String id = super.getDir(); if (id == null) {

NCOptionPane.showMessageDialog(this, NCLangRes.getInstance ().getStrByID(\return; }

UIFileChooser fileChooser = new UIFileChooser(); fileChooser.setFileSelectionMode(0); fileChooser.setMultiSelectionEnabled(false); int rs = fileChooser.showOpenDialog(this); if (rs != 0) return;

File file = fileChooser.getSelectedFile(); if (!(file.exists())) return;

String localFilePath = file.getAbsolutePath();

String fileName = fileChooser.getSelectedFile().getName(); if ((localFilePath == null) || (localFilePath.length() <= 0)) return;

if (FileManagerUtil.isFileExistedServer(getDir(), fileName)) { int result = NCOptionPane.showConfirmDialog(this, NCLangRes.getInstance().

getStrByID(\().

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getStrByID(\if (result != 0) { return; } }

//add by yzk at 2010-06-22 start

int iFileLength = (int) fileChooser.getSelectedFile().length(); if (iFileLength > iMaxAttachmentSize) {

MessageDialog.showHintDlg(this.getParent(), \提示信息\附件大小不 能超过 \！\return; }

int res = this.getUITreeFile().getRowCount(); if(res >= iMaxCount){

MessageDialog.showHintDlg(this.getParent(), \提示信息\附件个数不能超 过5个！\return; }

//add by yzk at 2010-06-22 end

FileManagerUtil.saveFileToServer(id, localFilePath); updateTree(); } }

1.8.4 存储特殊字符

数据库用BLOB类型，模板上设置成大文本和字符都可以 这个一般都是用来存图片什么的

1.9 常用的算法 1.9.1 判断字符串是否为数字

1用JAVA自带的函数

public static boolean isNumeric(String str){

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for (int i = str.length();--i>=0;){ if (!Character.isDigit(str.charAt(i))){ return false; } } return true; }

2用正则表达式

public static boolean isNumeric(String str){ Pattern pattern = Pattern.compile(\ return pattern.matcher(str).matches(); }

3用ascii码

public static boolean isNumeric(String str){ for(int i=str.length();--i>=0;){ int chr=str.charAt(i); if(chr<48 || chr>57) return false; }

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