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java 通訊錄 菜鳥 新手 簡單,學習java實現一個合適的開始

代碼片段和文件信息
package?com.lovo.util;
import?java.sql.Connection;
import?java.sql.DriverManager;
import?java.sql.ResultSet;
import?java.sql.SQLException;
import?java.sql.Statement;
public?final?class?JdbcUtils?{
private?static?final?String?url?=?“jdbc:microsoft:sqlserver://127.0.0.1:1433;databasename=minibook“;
static?{
try?{
Class.forName(“com.microsoft.jdbc.sqlserver.SQLServerDriver“);
}?catch?(ClassNotFoundException?e)?{
System.out.println(“加載驅動失敗“);
e.printStackTrace();
}
}
private?JdbcUtils()?{
}
private?static?Connection?conn?=?null;
public?static?Connection?getConnection()?throws?SQLException?{
conn?=?DriverManager.getConnection(url?“sa“?“sa“);
return?conn;
}
public?static?void?free(Connection?conn?Statement?st?ResultSet?rs)?{
try?{
if?(rs?!=?null)?{
rs.close();
}
}?catch?(SQLException?e)?{
e.printStackTrace();
}?finally?{
rs?=?null;
try?{
if?(st?!=?null)?{
st.close();
}
}?catch?(SQLException?e)?{
e.printStackTrace();
}?finally?{
st?=?null;
try?{
if?(conn?!=?null)?{
conn.close();
}
}?catch?(SQLException?e)?{
e.printStackTrace();
}
}
}
}
}
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????340??2009-12-31?13:24??minibook\.classpath
?????文件????????297??2010-01-03?17:55??minibook\.myme
?????文件???????1226??2009-12-28?21:58??minibook\.project
?????文件????????838??2009-12-29?19:18??minibook\html\delete.html
?????文件???????4253??2009-12-29?19:18??minibook\html\good.html
?????文件????????838??2009-12-29?19:18??minibook\html\insert.html
?????文件???????2294??2009-12-29?23:04??minibook\html\login.html
?????文件??????21772??2009-12-29?19:18??minibook\html\login.jpg
?????文件????????994??2009-12-29?23:03??minibook\html\register.html
?????文件????????859??2009-12-29?22:26??minibook\html\search.html
?????文件??????10752??2009-12-29?19:18??minibook\html\Thumbs.db
?????文件????????838??2009-12-29?19:18??minibook\html\update.html
?????文件????????784??2009-12-29?19:18??minibook\html\WelcomeError.html
?????文件???????1866??2009-12-29?19:18??minibook\html\WelcomeError.jpg
?????文件????????251??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\dao\factory\UserDataFactory.java
?????文件????????230??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\dao\factory\UserFactory.java
?????文件????????817??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\dao\imp\UserDataImp.java
?????文件????????682??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\dao\imp\UserImp.java
?????文件????????617??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\dao\UserDAO.java
?????文件????????792??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\dao\UserDataDAO.java
?????文件????????628??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\po\User.java
?????文件????????854??2009-12-29?15:02??minibook\lib\guoxin\com\lovo\minibook\po\UserData.java
?????文件???????1249??2009-12-29?15:58??minibook\lib\guoxin\JdbcUtils.java
?????文件???????3753??2009-12-29?15:58??minibook\lib\guoxin\UserDataImp.java
?????文件???????3995??2009-12-29?15:58??minibook\lib\guoxin\UserImp.java
?????文件????????248??2009-12-29?15:00??minibook\lib\huyu\com\lovo\minibook\dao\factory\UserDataFactory.java
?????文件????????227??2009-12-29?15:00??minibook\lib\huyu\com\lovo\minibook\dao\factory\UserFactory.java
?????文件????????817??2009-12-29?15:00??minibook\lib\huyu\com\lovo\minibook\dao\imp\UserDataImp.java
?????文件???????3067??2009-12-29?15:00??minibook\lib\huyu\com\lovo\minibook\dao\imp\UserImp.java
?????文件????????724??2009-12-29?15:00??minibook\lib\huyu\com\lovo\minibook\dao\UserDAO.java
............此處省略138個文件信息
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