importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.PreparedStatement;importjava.sql.ResultSet;importjava.sql.SQLException;publicclassstudent{//连接数据...

import java.sql.Connection;import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

public class student

{

//连接数据库

private String driver = "com.mysql.jdbc.Driver";

private String url ="jdbc:mysql://localhost:3306/student";

private String username ="root";

private String password = "root";

//操作数据库

private Connection conn = null;

private PreparedStatement ps= null;

private ResultSet rs = null;

public ResultSet queryResult(String sql,String []params){

try{

Class.forName(driver);

conn = DriverManager.getConnection(url,username,password);

ps= conn.prepareStatement(sql);

//循环遍历参数集合

for(int i = 0;i

{

ps.setString(i+1,params[i]);

}

rs = ps.executeQuery();

}catch(SQLException e){

e.printStackTrace();

}catch(ClassNotFoundException e)

{

e.printStackTrace();

}finally{

}

return rs;

}

//执行增加、修改、删除语句方法

public boolean isUpdate(String sql,String[]params){

boolean b = true;

try {

Class.forName(driver);

try {

conn = DriverManager.getConnection(url,username,password);

ps = conn.prepareStatement(sql);

//循环遍历参数集合，填补SQL语句中信息

for(int i = 0 ;i

ps.setString(i + 1,params[i]);

}

//执行操作，并获取受影响的行数

int i = ps.executeUpdate();

if(i != 1){

b = false;

}else{

b = true;

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return b;

}

public void close() {

//释放资源

try {

if(rs != null){

rs.close();

rs = null;

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

try {

if(ps != null){

ps.close();

ps = null;

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

try {

if(conn != null){

conn.close();

conn = null;

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

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