• addDay(Date aDate, int iDay) : Date
• addMonth(Date aDate, int iMonth) : Date
• addQuarter(Date aDate, int iQuarter) : Date
• addWeek(Date aDate, int iWeek) : Date
• addYear(Date aDate, int iYear) : Date
• getDayOfMonth(Date aDate) : int
• getDayOfWeek(Date aDate) : int
• getDayOfYear(Date aDate) : int
• getDaysBt(Date dFrom, Date dTo) : int
• getFirstDayOfMonth(Date aDate) : Date
• getFirstDayOfQuarter(Date aDate) : Date
• getFirstDayOfWeek(Date aDate) : Date
• getFirstDayOfYear(Date aDate) : Date
• getLastDayOfMonth(Date aDate) : Date
• getLastDayOfQuarter(Date aDate) : Date
• getLastDayOfWeek(Date aDate) : Date
• getLastDayOfYear(Date aDate) : Date
• getMonth(Date aDate) : int
• getQuarter(Date aDate) : int
• getYear(Date aDate) : int
• main(String[] args) : void
• trunc(Date aDate, String aFormat) : Date

公司經(jīng)常更換框架，好不容易寫好的業(yè)務(wù)模型經(jīng)常要推倒重來。
為此考慮將業(yè)務(wù)模型獨(dú)立出來，不受框架的影響。
具體考慮如下：
1.接口定義
DBConnection.java
public interface DBConnection {
? PreparedStatement prepareStatement(String aSql);
?....
? void free();
? void commit();
? void rollback();
}
DBContext.java
public interface DBContext {
? DBConnection newDBConnection();
}
2.模型實(shí)現(xiàn)
public class ActualFlow {
? DBContext dbContext=null;
? public ActualFlow() {
? }
? public void init(DBContext aContext){
??? dbContext=aContext;
? }
? public int calculate(String aBranchId,String aYear,String aMonth,String aUserId){
??? int iRtn=-1
??? PreparedStatement objState=null;
??? ResultSet objSet=null;
??? DBConnection objCon=null;
??? try {
????? objCon=dbContext.newDBConnection();
????? objState=objCon.prepareStatement("具體的sql語句");
????? //業(yè)務(wù)模型操作......

??? }
??? catch (Exception ex) {
????? ex.printStackTrace();
????? iRtn=-1;
??? }finally{
????? if (objSet!=null) {
??????? try {
????????? objSet.close();//關(guān)閉結(jié)果集合
??????? }
??????? catch (Exception ex) {
????????? ex.printStackTrace();
??????? }
????? }
????? if (objState!=null) {
??????? try {
????????? objState.close();//關(guān)閉statement
??????? }
??????? catch (Exception ex1) {
????????? ex1.printStackTrace();
??????? }
????? }
????? if (objCon!=null) {
??????? objCon.free();//釋放連接
????? }
??? }
??? return iRtn;
? }
}
3.在具體的開發(fā)框架下面
?? 定義EAPDBContext 實(shí)現(xiàn) DBContext
???如下方式復(fù)用模型：
????? ActualFlow objActualFlow=new ActualFlow();
? ??? objActualFlow.init(new EAPDBContext("actualFlow"));
????? int i=objActualFlow.calculate(this.m_branchID,this.m_year,this.m_month);

不知道是否合理，先練習(xí)練習(xí)

//字符串的Iterator函數(shù)
//例子:
//var it=new StringIterator("a,b,c,d",",");
//while(it.hasNext()){
//? alert(it.next());
//}

1.在web.xml中配置
? <servlet>
??? <servlet-name>excel</servlet-name>
??? <servlet-class>××××</servlet-class>
? </servlet>
? <servlet-mapping>
??? <servlet-name>excel</servlet-name>
??? <url-pattern>*.xls</url-pattern>
? </servlet-mapping>
2.頁面代碼
<a title='Excel' id=aa href='/fmudemo/Export.xls?para1=7&para2=1267&para3=null&para4=*'>
????? <font size=2>Excel</font>
</a>
3.編寫servlet
?? 輸出html字符串，
效果：
? 點(diǎn)擊鏈接后，會(huì)彈出對(duì)話框提示用excel打開。