java添加好友代码 java添加数据

Java程序向数据库中插入数据，代码如下：

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798//首先创建数据库，(access,oracle,mysql,sqlsever)其中之一，其中access,sqlsever需要配置数据源(odbc);//然后再eclipse中创建类(ConnDb,Test，TestBean)ConnDb功能为连接数据库，查询，插入，删除，修改数据的类，Test为含有main方法的测试类，TestBean为数据表中的字段属性及set,get方法//以下是ConnDb代码：package db;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;import java.util.ArrayList;public class ConnDb {public Connection startConn(Connection conn){  try {   Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");   conn = DriverManager.getConnection("jdbc:odbc:数据库","用户名", "密码");  } catch (Exception e) {   System.out.println("连接数据库时出现错误");  }  return conn; }   public ArrayList executeQuery(String sql){  Connection conn = null;  Statement stmt = null;  ResultSet rs = null;  ArrayList list = new ArrayList();  try {   conn = startConn(conn);   stmt = conn.createStatement();   rs = stmt.executeQuery(sql);//sql为sql语句例如"select * from 表名"，从main方法中传进来，这里用的是ArrayList 类将查询结果存储起来   while(rs.next()){    TestBean tb = new TestBean();    tb.setTid(rs.getString("tid"));    tb.setTname(rs.getString("tname"));    tb.setTinfo(rs.getString("tinfo"));    list.add(tb);   }  } catch (SQLException e) {   // TODO Auto-generated catch block   e.printStackTrace();  }finally{   closeConn(rs,stmt,conn);  }  return list; }  public void executeUpdate(String sql){  Connection conn = null;  Statement stmt = null;  try {   conn = startConn(conn);   stmt = conn.createStatement();   stmt.executeUpdate(sql);  } catch (SQLException e) {   System.out.println("修改，插入或者删除数据库数据时发生错误!");  }finally{   closeConn(stmt,conn);  } } public void closeConn(ResultSet rs,Statement stmt,Connection conn){  try {   if(rs != null){    rs.close();   }   if(stmt != null){    stmt.close();   }   if(conn != null){    conn.close();   }  } catch (SQLException e) {   // TODO Auto-generated catch block   System.out.println("关闭数据库的时候发生错误!");  } } public void closeConn(Statement stmt,Connection conn){  try {   if(stmt != null){    stmt.close();   }   if(conn != null){    conn.close();   }  } catch (SQLException e) {   // TODO Auto-generated catch block   System.out.println("关闭数据库的时候发生错误!");  } }}