java连接sqlserver的学生成绩管理系统

1、下载myeclipse并激活
这里提供下载文件和激活文件
myeclipse: https://pan.baidu.com/s/1XRnU1vjA-dUaEoLV7A7d4Q 提取码: 53q0
激活文件: https://pan.baidu.com/s/1P9fvQMuutNIw2lXtBc-2tQ 提取码: r103
如果没有sqlserver也可以提供: https://pan.baidu.com/s/1dRGl8P8tNB4LLlMhM2tmQQ 提取码: 0488
2、设置好自己sqlsever的登录名和密码，具体过程可以百度。这里有百度链接：我的登录名和密码是“sa”、“123”。新建一个数据库，命名为“学生成绩管理系统”

3、下载一个sqlserver的jar包，导入到新建的Java项目中。
定义增删改查等功能的函数：

package jdbc;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.sql.*;
public class JdbcUtils {

// 表示定义数据库的用户名
private final String USERNAME = “sa”;
// 定义数据库的密码
private final String PASSWORD = “123”;
// 定义数据库的驱动信息
private final String DRIVER = “com.microsoft.sqlserver.jdbc.SQLServerDriver”;
// 定义访问数据库的地址
private final String URL = “jdbc:sqlserver://localhost:1433;DatabaseName=学生成绩管理系统”;
// 定义数据库的链接
private Connection connection;
// 定义sql语句的执行对象
private PreparedStatement pstmt;
// 定义查询返回的结果集合
private ResultSet resultSet;
// 实现批处理操作的功能
private Statement stmt;

public JdbcUtils() {
try {
Class.forName(DRIVER);
System.out.println(“注册驱动成功!!”);
} catch (Exception e) {
System.out.println(“注册驱动失败!!”);
// TODO: handle exception
}
}

// 定义获得数据库的链接
public Connection getConnection() {
try {
connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);
// System.out.println(“数据库连接成功!!”);
} catch (Exception e) {
// System.out.println(“数据库连接失败!!”);
// TODO: handle exception
}
return connection;
}

public boolean deleteByBatch(String[] sql) throws SQLException{
boolean flag = false;
stmt = connection.createStatement();
if(sql!=null){
for(int i=0;i stmt.addBatch(sql[i]);
}
}
int[] count = stmt.executeBatch();
if(count!=null){
flag = true;
}
return flag;
}
/**

• 完成对数据库的表的添加删除和修改的操作
• @param sql
• @param params
• @return
• @throws SQLException
  */
  public boolean updateByPreparedStatement(String sql, List params)
  throws SQLException {
  boolean flag = false;
  int result = -1;// 表示当用户执行添加删除和修改的时候所影响数据库的行数
  pstmt = connection.prepareStatement(sql);
  int index = 1;
  if (params != null && !params.isEmpty()) {
  for (int i = 0; i < params.size(); i++) {
  pstmt.setObject(index++, params.get(i));
  }
  }
  result = pstmt.executeUpdate();
  flag = result > 0 ? true : false;
  return flag;
  }

/**

• 查询返回单条记录
• @param sql
• @param params
• @return
• @throws SQLException
  /
  public Map findSimpleResult(String sql, List params)
  throws SQLException {
  Map map = new HashMap();
  int index = 1;
  pstmt = connection.prepareStatement(sql);
  if (params != null && !params.isEmpty()) {
  for (int i = 0; i < params.size(); i++) {
  pstmt.setObject(index++, params.get(i));
  }
  }
  resultSet = pstmt.executeQuery();// 返回查询结果
  ResultSetMetaData metaData = resultSet.getMetaData();
  int col_len = metaData.getColumnCount();// 获得列的名称
  while (resultSet.next()) {
  for (int i = 0; i < col_len; i++) {
  String cols_name = metaData.getColumnName(i + 1);
  Object cols_value = resultSet.getObject(cols_name);
  if (cols_value == null) {
  cols_value = “”;
  }
  map.put(cols_name, cols_value);
  }
  }
  return map;
  }/*
• 查询返回多行记录
• @param sql
• @param params
• @return
• @throws SQLException
  */
  public List> findMoreResult(String sql,
  List params) throws SQLException {
  List> list = new ArrayList>();
  int index = 1;
  pstmt = connection.prepareStatement(sql);
  if (params != null && !params.isEmpty()) {
  for (int i = 0; i < params.size(); i++) {
  pstmt.setObject(index++, params.get(i));
  }
  }
  resultSet = pstmt.executeQuery();
  ResultSetMetaData metaData = resultSet.getMetaData();
  int cols_len = metaData.getColumnCount();
  while (resultSet.next()) {
  Map map = new HashMap();
  for (int i = 0; i < cols_len; i++) {
  String cols_name = metaData.getColumnName(i + 1);
  Object cols_value = resultSet.getObject(cols_name);
  if (cols_value == null) {
  cols_value = “”;
  }
  map.put(cols_name, cols_value);
  }
  list.add(map);
  }
  return list;
  }

// jdbc的封装可以用反射机制来封装：
public T findSimpleRefResult(String sql, List params,
Class cls) throws Exception {
T resultObject = null;
int index = 1;
pstmt = connection.prepareStatement(sql);
if (params != null && !params.isEmpty()) {
for (int i = 0; i < params.size(); i++) {
pstmt.setObject(index++, params.get(i));
}
}
resultSet = pstmt.executeQuery();
ResultSetMetaData metaData = resultSet.getMetaData();
int cols_len = metaData.getColumnCount();
while (resultSet.next()) {
// 通过反射机制创建实例
resultObject = cls.newInstance();
for (int i = 0; i < cols_len; i++) {
String cols_name = metaData.getColumnName(i + 1);
Object cols_value = resultSet.getObject(cols_name);
if (cols_value == null) {
cols_value = “”;
}
Field field = cls.getDeclaredField(cols_name);
field.setAccessible(true);// 打开javabean的访问private权限
field.set(resultObject, cols_value);
}
}
return resultObject;
}

/**

• 通过反射机制访问数据库
• @param
• @param sql
• @param params
• @param cls
• @return
• @throws Exception
  */
  public List findMoreRefResult(String sql, List params,
  Class cls) throws Exception {
  List list = new ArrayList();
  int index = 1;
  pstmt = connection.prepareStatement(sql);
  if (params != null && !params.isEmpty()) {
  for (int i = 0; i < params.size(); i++) {
  pstmt.setObject(index++, params.get(i));
  }
  }
  resultSet = pstmt.executeQuery();
  ResultSetMetaData metaData = resultSet.getMetaData();
  int cols_len = metaData.getColumnCount();
  while (resultSet.next()) {
  T resultObject = cls.newInstance();
  for (int i = 0; i < cols_len; i++) {
  String cols_name = metaData.getColumnName(i + 1);
  Object cols_value = resultSet.getObject(cols_name);
  if (cols_value == null) {
  cols_value = “”;
  }
  Field field = cls.getDeclaredField(cols_name);
  field.setAccessible(true);
  field.set(resultObject, cols_value);
  }
  list.add(resultObject);
  }
  return list;
  }

public void releaseConn() {
if (resultSet != null) {
try {
resultSet.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (stmt != null) {
try {
stmt.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (pstmt != null) {
try {
pstmt.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (connection != null) {
try {
connection.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

在主函数中调用它：
import java.sql.SQLException;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;

import jdbc.JdbcUtils;
import java.util.Scanner;

public class Main {

/**
 * @param args
 */




public static void main(String[] args) {
	System.out.println("请输入您的账号：");
	// 判断是否还有输入
	String str1;
	Scanner scan = new Scanner(System.in);
	str1 = scan.next();

	JdbcUtils jdbc = new JdbcUtils();

	jdbc.getConnection();

	List