数据库连接:学生信息管理系统
package Student;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.DriverManager;
public class DBUtil {
public static String db_url = "jdbc:mysql://localhost:3306/student?characterEncoding=utf8";
public static String db_user = "root";
public static String db_pass = "xjmwan1314";
public static String db_user = "root";
public static String db_pass = "xjmwan1314";
public static Connection getConn () {
Connection conn = null;
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(db_url, db_user, db_pass);
} catch (Exception e) {
e.printStackTrace();
}
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(db_url, db_user, db_pass);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
}
}
}
StudentOperate.java
package Student;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import Student.DBUtil;
/**
* Servlet implementation class StudentOperate
*/
@WebServlet("/operate")
public class StudentOperate extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
super.service(request, response);
String method=request.getParameter("method");
if(method.equals("register"))
{
register(request,response);
// response.getWriter().append("okkk").append(request.getContextPath());
}
if(method.equals("add"))
{
add(request,response);
// response.getWriter().append("okkk").append(request.getContextPath());
}
}
private void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String name=request.getParameter("name");
// String num=request.getParameter("num");
name=new String(name.getBytes("ISO-8859-1"),"UTF-8");//服务器默认使用 ISO-8859-1 编码接受参数,手动转为UTF-8
String english=request.getParameter("english");
String math=request.getParameter("math");
String computer=request.getParameter("computer");
Connection con = DBUtil.getConn();
PreparedStatement stmt=null;
String sql = "insert into student(name,english,math,computer)values(?,?,?,?)";
try {
stmt = con.prepareStatement(sql);
stmt.setString(1,name);
stmt.setString(2,english);
stmt.setString(3,math);
stmt.setString(4,computer);
//stmt.execute();
int i=stmt.executeUpdate();
if(i==1) {
request.setAttribute("message", "添加成功!");
request.getRequestDispatcher("add.jsp").forward(request,response);
}
else
{
request.setAttribute("message", "添加失败!");
request.getRequestDispatcher("add.jsp").forward(request,response);
}
stmt.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
* Servlet implementation class StudentOperate
*/
@WebServlet("/operate")
public class StudentOperate extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
super.service(request, response);
String method=request.getParameter("method");
if(method.equals("register"))
{
register(request,response);
// response.getWriter().append("okkk").append(request.getContextPath());
}
if(method.equals("add"))
{
add(request,response);
// response.getWriter().append("okkk").append(request.getContextPath());
}
}
private void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String name=request.getParameter("name");
// String num=request.getParameter("num");
name=new String(name.getBytes("ISO-8859-1"),"UTF-8");//服务器默认使用 ISO-8859-1 编码接受参数,手动转为UTF-8
String english=request.getParameter("english");
String math=request.getParameter("math");
String computer=request.getParameter("computer");
Connection con = DBUtil.getConn();
PreparedStatement stmt=null;
String sql = "insert into student(name,english,math,computer)values(?,?,?,?)";
try {
stmt = con.prepareStatement(sql);
stmt.setString(1,name);
stmt.setString(2,english);
stmt.setString(3,math);
stmt.setString(4,computer);
//stmt.execute();
int i=stmt.executeUpdate();
if(i==1) {
request.setAttribute("message", "添加成功!");
request.getRequestDispatcher("add.jsp").forward(request,response);
}
else
{
request.setAttribute("message", "添加失败!");
request.getRequestDispatcher("add.jsp").forward(request,response);
}
stmt.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void register(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String account=request.getParameter("account");
account=new String(account.getBytes("ISO-8859-1"),"UTF-8");
String code=request.getParameter("code");
String sex=request.getParameter("sex");
sex=new String(sex.getBytes("ISO-8859-1"),"UTF-8");
String name=request.getParameter("name");
// String num=request.getParameter("num");
name=new String(name.getBytes("ISO-8859-1"),"UTF-8");//服务器默认使用 ISO-8859-1 编码接受参数,手动转为UTF-8
String num=request.getParameter("num");
String email=request.getParameter("email");
String college=request.getParameter("college");
college=new String(college.getBytes("ISO-8859-1"),"UTF-8");
String major=request.getParameter("major");
major=new String(major.getBytes("ISO-8859-1"),"UTF-8");
String cclass=request.getParameter("class");
cclass=new String(cclass.getBytes("ISO-8859-1"),"UTF-8");
String year=request.getParameter("year");
String home=request.getParameter("home");
home=new String(home.getBytes("ISO-8859-1"),"UTF-8");
String other=request.getParameter("other");
other=new String(other.getBytes("ISO-8859-1"),"UTF-8");
Connection con = DBUtil.getConn();
PreparedStatement stmt=null;
String sql = "insert into register(account,code,sex,name,num,email,college,major,class,year,home,other)values(?,?,?,?,?,?,?,?,?,?,?,?)";
try {
stmt = con.prepareStatement(sql);
stmt.setString(1,account);
stmt.setString(2,code);
stmt.setString(3,sex);
stmt.setString(4,name);
stmt.setString(5,num);
stmt.setString(6,email);
stmt.setString(7,college);
stmt.setString(8,major);
stmt.setString(9,cclass);
stmt.setString(10,year);
stmt.setString(11,home);
stmt.setString(12,other);
//stmt.execute();
int i=stmt.executeUpdate();
if(i==1) {
request.setAttribute("message", "添加成功!");
request.getRequestDispatcher("regist.jsp").forward(request,response);
}
else
{
request.setAttribute("message", "添加失败!");
request.getRequestDispatcher("regist.jsp").forward(request,response);
}
stmt.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
private void register(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String account=request.getParameter("account");
account=new String(account.getBytes("ISO-8859-1"),"UTF-8");
String code=request.getParameter("code");
String sex=request.getParameter("sex");
sex=new String(sex.getBytes("ISO-8859-1"),"UTF-8");
String name=request.getParameter("name");
// String num=request.getParameter("num");
name=new String(name.getBytes("ISO-8859-1"),"UTF-8");//服务器默认使用 ISO-8859-1 编码接受参数,手动转为UTF-8
String num=request.getParameter("num");
String email=request.getParameter("email");
String college=request.getParameter("college");
college=new String(college.getBytes("ISO-8859-1"),"UTF-8");
String major=request.getParameter("major");
major=new String(major.getBytes("ISO-8859-1"),"UTF-8");
String cclass=request.getParameter("class");
cclass=new String(cclass.getBytes("ISO-8859-1"),"UTF-8");
String year=request.getParameter("year");
String home=request.getParameter("home");
home=new String(home.getBytes("ISO-8859-1"),"UTF-8");
String other=request.getParameter("other");
other=new String(other.getBytes("ISO-8859-1"),"UTF-8");
Connection con = DBUtil.getConn();
PreparedStatement stmt=null;
String sql = "insert into register(account,code,sex,name,num,email,college,major,class,year,home,other)values(?,?,?,?,?,?,?,?,?,?,?,?)";
try {
stmt = con.prepareStatement(sql);
stmt.setString(1,account);
stmt.setString(2,code);
stmt.setString(3,sex);
stmt.setString(4,name);
stmt.setString(5,num);
stmt.setString(6,email);
stmt.setString(7,college);
stmt.setString(8,major);
stmt.setString(9,cclass);
stmt.setString(10,year);
stmt.setString(11,home);
stmt.setString(12,other);
//stmt.execute();
int i=stmt.executeUpdate();
if(i==1) {
request.setAttribute("message", "添加成功!");
request.getRequestDispatcher("regist.jsp").forward(request,response);
}
else
{
request.setAttribute("message", "添加失败!");
request.getRequestDispatcher("regist.jsp").forward(request,response);
}
stmt.close();
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public StudentOperate() {
super();
// TODO Auto-generated constructor stub
}
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public StudentOperate() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
rejist.java
结果截图