java实训学生管理系统_学生信息管理系统（Java实训）
package program9;
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import javax.swing.JOptionPane;
public class Select extends winselect {
static int max=500;
public static String[][] getnumber(String S){
String sql_url = "jdbc:sqlserver://localhost:1433;integratedSecurity=true;DatabaseName=Student";//数据库路径(一般都是这样写)，test是数据库名称
String name = "sa";//用户名
String password = "wu123456";//密码
Connection conn;
PreparedStatement preparedStatement = null;
String[][] rows = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//连接驱动
conn = DriverManager.getConnection(sql_url, name, password);//连接数据库
preparedStatement = conn.prepareStatement("select * from Student where 学号='"+S+"'");
ResultSet result1 = preparedStatement.executeQuery();
if(result1.wasNull())
JOptionPane.showMessageDialog(null, "结果集中无记录");
rows = new String[max][5];
String[] s = null;
s = new String[5];
ResultSetMetaData rsmd = result1.getMetaData();
int i=0;
while(result1.next()){
s=getNextRow(result1,rsmd);
for(int p=0;p<5;p++)
{
rows[i][p]=s[p].trim();
//System.out.println(rows[i][p]+" "+i+" "+p);
}
i++;
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
System.out.println("未成功加载驱动。");
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
System.out.println("未成功打开数据库。");
e.printStackTrace();
}
return rows;
}
public static String[][] getname(String S){
String sql_url = "jdbc:sqlserver://localhost:1433;integratedSecurity=true;DatabaseName=Student";//数据库路径(一般都是这样写)，test是数据库名称
String name = "sa";//用户名
String password = "wu123456";//密码
Connection conn;
PreparedStatement preparedStatement = null;
String[][] rows = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//连接驱动
conn = DriverManager.getConnection(sql_url, name, password);//连接数据库
preparedStatement = conn.prepareStatement("select * from Student where 姓名='"+S+"'");
ResultSet result1 = preparedStatement.executeQuery();
if(result1.wasNull())
JOptionPane.showMessageDialog(null, "结果集中无记录");
rows = new String[max][5];
String[] s = null;
s = new String[5];
ResultSetMetaData rsmd = result1.getMetaData();
int i=0;
while(result1.next()){
s=getNextRow(result1,rsmd);
for(int p=0;p<5;p++)
{
rows[i][p]=s[p].trim();
//System.out.println(rows[i][p]+" "+i+" "+p);
}
i++;
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
System.out.println("未成功加载驱动。");
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
System.out.println("未成功打开数据库。");
e.printStackTrace();
}
return rows;
}
public static String[][] getage(String S){
String sql_url = "jdbc:sqlserver://localhost:1433;integratedSecurity=true;DatabaseName=Student";//数据库路径(一般都是这样写)，test是数据库名称
String name = "sa";//用户名
String password = "wu123456";//密码
Connection conn;
PreparedStatement preparedStatement = null;
String[][] rows = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//连接驱动
conn = DriverManager.getConnection(sql_url, name, password);//连接数据库
preparedStatement = conn.prepareStatement("select * from Student where 年龄='"+S+"'");
ResultSet result1 = preparedStatement.executeQuery();
if(result1.wasNull())
JOptionPane.showMessageDialog(null, "结果集中无记录");
rows = new String[max][5];
String[] s = null;
s = new String[5];
ResultSetMetaData rsmd = result1.getMetaData();
int i=0;
while(result1.next()){
s=getNextRow(result1,rsmd);
for(int p=0;p<5;p++)
{
rows[i][p]=s[p].trim();
//System.out.println(rows[i][p]+" "+i+" "+p);
}
i++;
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
System.out.println("未成功加载驱动。");
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
System.out.println("未成功打开数据库。");
e.printStackTrace();
}
return rows;
}
public static String[][] getsex(String S){
String sql_url = "jdbc:sqlserver://localhost:1433;integratedSecurity=true;DatabaseName=Student";//数据库路径(一般都是这样写)，test是数据库名称
String name = "sa";//用户名
String password = "wu123456";//密码
Connection conn;
PreparedStatement preparedStatement = null;
String[][] rows = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//连接驱动
conn = DriverManager.getConnection(sql_url, name, password);//连接数据库
preparedStatement = conn.prepareStatement("select * from Student where 性别='"+S+"'");
ResultSet result1 = preparedStatement.executeQuery();
if(result1.wasNull())
JOptionPane.showMessageDialog(null, "结果集中无记录");
rows = new String[max][5];
String[] s = null;
s = new String[5];
ResultSetMetaData rsmd = result1.getMetaData();
int i=0;
while(result1.next()){
s=getNextRow(result1,rsmd);
for(int p=0;p<5;p++)
{
rows[i][p]=s[p].trim();
//System.out.println(rows[i][p]+" "+i+" "+p);
}
i++;
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
System.out.println("未成功加载驱动。");
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
System.out.println("未成功打开数据库。");
e.printStackTrace();
}
return rows;
}
public static String[][] getdepartments(String S){
String sql_url = "jdbc:sqlserver://localhost:1433;integratedSecurity=true;DatabaseName=Student";//数据库路径(一般都是这样写)，test是数据库名称
String name = "sa";//用户名
String password = "wu123456";//密码
Connection conn;
PreparedStatement preparedStatement = null;
String[][] rows = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//连接驱动
conn = DriverManager.getConnection(sql_url, name, password);//连接数据库
preparedStatement = conn.prepareStatement("select * from Student where 院系='"+S+"'");
ResultSet result1 = preparedStatement.executeQuery();
if(result1.wasNull())
JOptionPane.showMessageDialog(null, "结果集中无记录");
rows = new String[max][5];
String[] s = null;
s = new String[5];
ResultSetMetaData rsmd = result1.getMetaData();
int i=0;
while(result1.next()){
s=getNextRow(result1,rsmd);
for(int p=0;p<5;p++)
{
rows[i][p]=s[p].trim();
//System.out.println(rows[i][p]+" "+i+" "+p);
}
i++;
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
System.out.println("未成功加载驱动。");
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
System.out.println("未成功打开数据库。");
e.printStackTrace();
}
return rows;
}
// 得到数据库表头
public static String[] getHead(){
String sql_url = "jdbc:sqlserver://localhost:1433;integratedSecurity=true;DatabaseName=Student";//数据库路径(一般都是这样写)，test是数据库名称
String name = "sa";//用户名
String password = "wu123456";//密码
Connection conn;
PreparedStatement preparedStatement = null;
String[] columnHeads = null;
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//连接驱动
conn = DriverManager.getConnection(sql_url, name, password);//连接数据库
//if(!conn.isClosed())
//System.out.println("成功连接数据库");
preparedStatement = conn.prepareStatement("select * from Student");
ResultSet result1 = preparedStatement.executeQuery();
boolean moreRecords = result1.next();
if(!moreRecords)
JOptionPane.showMessageDialog(null, "结果集中无记录");
columnHeads = new String[5];
ResultSetMetaData rsmd = result1.getMetaData();
for(int i = 1; i <= rsmd.getColumnCount(); i++)
columnHeads[i-1]=rsmd.getColumnName(i).trim();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
System.out.println("未成功加载驱动。");
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
System.out.println("未成功打开数据库。");
e.printStackTrace();
}
return columnHeads;
}
// 得到数据库中下一行数据
private static String[] getNextRow(ResultSet rs,ResultSetMetaData rsmd) throws SQLException{
String[] currentRow = null;
currentRow = new String[5];
for(int i = 1; i <= rsmd.getColumnCount(); i++){
{
currentRow[i-1]=rs.getString(i).trim();
//System.out.println(currentRow[i-1]+" "+(i-1));
}
}
return currentRow;
}
/* public static void main(String[] args){
//System.out.println(getHead());
getRows();
}*/
}