Dao.java
package Dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import DBUtil.DBUtil;
import Javabean.Cou;
import Javabean.Jibenxinxi;
import Javabean.Stu;
import Javabean.Teacher;
public class Dao {
public int searchPid(String username,String password)
{
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
int pid=0;
try {
String sql="select pid from user where username= '"+username+"' and password='"+password+"'";
state = conn.createStatement();
rs = state.executeQuery(sql);
while(rs.next()){
pid = rs.getInt("pid");
}
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(state, conn);
}
return pid;
}
public boolean addtea(Teacher teacher)
{
Connection conn = DBUtil.getConn();
PreparedStatement pstmt = null;
boolean f = false;
int a=0;
try {
String sql = "insert into teacher(tpid,teaname,sex,txueyuan,zhicheng) value(?,?,?,?,?)";
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, teacher.getTpid());
pstmt.setString(2, teacher.getTeaname());
pstmt.setString(3, teacher.getSex());
pstmt.setString(4, teacher.getTxueyuan());
pstmt.setString(5, teacher.getZhicheng());
a = pstmt.executeUpdate();
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(pstmt, conn);
}
if(a>0)
f=true;
return f;
}
public boolean adduser(String tpid,String password,int pid)
{
Connection conn = DBUtil.getConn();
PreparedStatement pstmt = null;
boolean f = false;
int a=0;
try {
String sql = "insert into user(username,password,pid) value(?,?,?)";
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, tpid);
pstmt.setString(2, password);
pstmt.setInt(3, pid);
a = pstmt.executeUpdate();
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(pstmt, conn);
}
if(a>0)
f=true;
return f;
}
public boolean addstu(Stu stu)
{
Connection conn = DBUtil.getConn();
PreparedStatement pstmt = null;
boolean f = false;
int a=0;
try {
String sql = "insert into stu(spid,stuname,sex,banji,ye) value(?,?,?,?,?)";
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, stu.getSpid());
pstmt.setString(2, stu.getStuname());
pstmt.setString(3, stu.getSex());
pstmt.setString(4, stu.getBanji());
pstmt.setString(5, stu.getYe());
a = pstmt.executeUpdate();
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(pstmt, conn);
}
if(a>0)
f=true;
return f;
}
public String searchteaname(String tpid)
{
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
String teaname=null;
try {
String sql="select teaname from teacher where tpid= '"+tpid+"'";
state = conn.createStatement();
rs = state.executeQuery(sql);
while(rs.next()){
teaname = rs.getString("teaname");
}
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(state, conn);
}
return teaname;
}
public boolean addcou(Cou cou)
{
Connection conn = DBUtil.getConn();
PreparedStatement pstmt = null;
boolean f = false;
int a=0;
try {
String sql = "insert into cou(cpid,cname,num,snum,jiaoshi) value(?,?,?,?,?)";
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, cou.getCpid());
pstmt.setString(2, cou.getCname());
pstmt.setInt(3, cou.getNum());
pstmt.setInt(4, cou.getSnum());
pstmt.setString(5, cou.getJiaoshi());
a = pstmt.executeUpdate();
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(pstmt, conn);
}
if(a>0)
f=true;
return f;
}
public boolean updatetea(Teacher teacher) {
String sql = "update teacher set teaname='" + teacher.getTeaname() + "', sex='" + teacher.getSex()
+ "', txueyuan='" +teacher.getTxueyuan() + "',zhicheng='" +teacher.getZhicheng() + "'where tpid='" + teacher.getTpid() + "'";
Connection conn = DBUtil.getConn();
Statement state = null;
boolean f = false;
int a = 0;
try {
state = conn.createStatement();
System.out.println("看看是不是执行了");
a = state.executeUpdate(sql);
System.out.println(a);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(state, conn);
}
if (a > 0) {
f = true;
}
System.out.println(f);
return f;
}
public boolean updatestu(Stu stu) {
String sql = "update stu set stuname='" + stu.getStuname() + "', sex='" + stu.getSex()
+ "', banji='" +stu.getBanji() + "',ye='" +stu.getYe() + "'where spid='" + stu.getSpid() + "'";
Connection conn = DBUtil.getConn();
Statement state = null;
boolean f = false;
int a = 0;
try {
state = conn.createStatement();
System.out.println("看看是不是执行了");
a = state.executeUpdate(sql);
System.out.println(a);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(state, conn);
}
if (a > 0) {
f = true;
}
System.out.println(f);
return f;
}
public List<Cou> liulankecheng() {
String sql = "select * from cou";
List<Cou> list = new ArrayList<>();
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
Cou bean = null;
while (rs.next()) {
int id = rs.getInt("id");
String cpid = rs.getString("cpid");
String cname = rs.getString("cname");
int num = rs.getInt("num");
int snum = rs.getInt("snum");
String jiaoshi = rs.getString("jiaoshi");
bean = new Cou(id,cpid, cname, num ,snum,jiaoshi);
list.add(bean);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return list;
}
public Cou searchByid(int id) {
String sql = "select * from cou where id= '"+id+"'";
Cou cou = null;
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
while (rs.next()) {
//int id = rs.getInt("id");
String cpid = rs.getString("cpid");
String cname = rs.getString("cname");
int num = rs.getInt("num");
int snum = rs.getInt("snum");
String jiaoshi = rs.getString("jiaoshi");
cou = new Cou(cpid, cname, num ,snum,jiaoshi);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return cou;
}
public boolean updatecou(int id,int snum) {
String sql="update cou set snum='" + snum + "'where id='" + id +"'";
Connection conn = DBUtil.getConn();
Statement state = null;
boolean f = false;
int a = 0;
try {
state = conn.createStatement();
System.out.println("看看是不是执行了");
a = state.executeUpdate(sql);
System.out.println(a);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(state, conn);
}
if (a > 0) {
f = true;
}
System.out.println(f);
return f;
}
public String searchtpid(String jiaoshi) {
String sql = "select tpid from teacher where teaname= '"+jiaoshi+"'";
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
String tpid=null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
while (rs.next()) {
tpid=rs.getString("tpid");
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return tpid;
}
public Stu searchstu(String spid) {
String sql = "select * from stu where spid= '"+spid+"'";
Stu stu = null;
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
while (rs.next()) {
//int id = rs.getInt("id");
String spid1 = rs.getString("spid");
String stuname = rs.getString("stuname");
String sex = rs.getString("sex");
String banji = rs.getString("banji");
String ye = rs.getString("ye");
stu = new Stu(spid1, stuname, sex ,banji,ye);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return stu;
}
public boolean addjiben(String cpid,String tpid,String spid,Stu stu) {
Connection conn = DBUtil.getConn();
PreparedStatement pstmt = null;
boolean f = false;
int a=0;
try {
String sql = "insert into jiben(cpid,tpid,spid,stuname,sex,banji,ye) value(?,?,?,?,?,?,?)";
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, cpid);
pstmt.setString(2, tpid);
pstmt.setString(3, spid);
pstmt.setString(4, stu.getStuname());
pstmt.setString(5, stu.getSex());
pstmt.setString(6, stu.getBanji());
pstmt.setString(7, stu.getYe());
a = pstmt.executeUpdate();
}
catch(SQLException e) {
e.printStackTrace();
}
finally {
DBUtil.close(pstmt, conn);
}
if(a>0)
f=true;
return f;
}
public List<Cou> liulankecheng1() {
String sql = "select * from cou";
List<Cou> list = new ArrayList<>();
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
Cou bean = null;
while (rs.next()) {
int id = rs.getInt("id");
String cpid = rs.getString("cpid");
String cname = rs.getString("cname");
int num = rs.getInt("num");
int snum = rs.getInt("snum");
String jiaoshi = rs.getString("jiaoshi");
if(snum<num) {
bean = new Cou(id,cpid, cname, num ,snum,jiaoshi);
list.add(bean);
}
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return list;
}
public List<Jibenxinxi> searchstuinfo(String tpid) {
String sql = "select * from jiben where tpid= '"+tpid+"'";
Connection conn = DBUtil.getConn();
Statement state = null;
ResultSet rs = null;
List<Jibenxinxi> list = new ArrayList<>();
try {
state = conn.createStatement();
rs = state.executeQuery(sql);
Jibenxinxi jiben = null;
while (rs.next()) {
//int id = rs.getInt("id");
String cpid = rs.getString("cpid");
String tpid1 = rs.getString("tpid");
String spid = rs.getString("spid");
String stuname = rs.getString("stuname");
String sex = rs.getString("sex");
String banji = rs.getString("banji");
String ye = rs.getString("ye");
jiben = new Jibenxinxi(cpid,tpid1,spid,stuname,sex ,banji,ye);
list.add(jiben);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.close(rs, state, conn);
}
return list;
}
}
DBUtil.java
package DBUtil;
import java.sql.*;
/**
* 数据库连接工具
* @author Hu
*
*/
public class DBUtil {
public static String url = "jdbc:mysql://localhost:3306/xuanke?serverTimezone=UTC";
public static String user = "root";
public static String password = "11111111";
public static Connection getConn () {
Connection conn = null;
try {
Class.forName("com.mysql.cj.jdbc.Driver");//加载驱动
conn = DriverManager.getConnection(url, user, password);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
/**
* 关闭连接
* @param state
* @param conn
*/
public static void close (PreparedStatement preparedState, Connection conn) {
if (preparedState != null) {
try {
preparedState.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close (ResultSet rs, PreparedStatement preparedState, Connection conn) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (preparedState != null) {
try {
preparedState.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
/**
* 关闭连接
* @param state
* @param conn
*/
public static void close (Statement state, Connection conn) {
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void close (ResultSet rs, Statement state, Connection conn) {
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (state != null) {
try {
state.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) throws SQLException {
Connection conn = getConn();
PreparedStatement preparedStatement = null;
ResultSet rs = null;
String sql ="select * from xuanke";
preparedStatement = conn.prepareStatement(sql);
rs = preparedStatement.executeQuery();
if(rs.next()){
System.out.println("数据库为空");
}
else{
System.out.println("数据库不为空");
}
}
}
Javabean包
Cou.java
package Javabean;
public class Cou {
private int id;
private String cpid;
private String cname;
private int num;
private int snum;
private String jiaoshi;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCpid() {
return cpid;
}
public void setCpid(String cpid) {
this.cpid = cpid;
}
public String getCname() {
return cname;
}
public void setCname(String cname) {
this.cname = cname;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
public int getSnum() {
return snum;
}
public void setSnum(int snum) {
this.snum = snum;
}
public String getJiaoshi() {
return jiaoshi;
}
public void setJiaoshi(String jiaoshi) {
this.jiaoshi = jiaoshi;
}
public Cou() {}
public Cou(int id,String cpid,String cname,int num,int snum,String jiaoshi) {
this.id=id;
this.cpid=cpid;
this.cname=cname;
this.num=num;
this.snum=snum;
this.jiaoshi=jiaoshi;
}
public Cou(String cpid,String cname,int num,int snum,String jiaoshi) {
this.cpid=cpid;
this.cname=cname;
this.num=num;
this.snum=snum;
this.jiaoshi=jiaoshi;
}
}
Jibenxinxi.java
package Javabean;
public class Jibenxinxi {
private int id;
private String cpid;
private String tpid;
private String spid;
private String stuname;
private String sex;
private String banji;
private String ye;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCpid() {
return cpid;
}
public void setCpid(String cpid) {
this.cpid = cpid;
}
public String getTpid() {
return tpid;
}
public void setTpid(String tpid) {
this.tpid = tpid;
}
public String getSpid() {
return spid;
}
public void setSpid(String spid) {
this.spid = spid;
}
public String getStuname() {
return stuname;
}
public void setStuname(String stuname) {
this.stuname = stuname;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getBanji() {
return banji;
}
public void setBanji(String banji) {
this.banji = banji;
}
public String getYe() {
return ye;
}
public void setYe(String ye) {
this.ye = ye;
}
public Jibenxinxi() { }
public Jibenxinxi(int id,String cpid,String tpid,String spid,String stuname,String sex,String banji,String ye) {
this.id=id;
this.cpid=cpid;
this.tpid=tpid;
this.spid=spid;
this.stuname=stuname;
this.sex=sex;
this.banji=banji;
this.ye=ye;
}
public Jibenxinxi(String cpid,String tpid,String spid,String stuname,String sex,String banji,String ye) {
this.cpid=cpid;
this.tpid=tpid;
this.spid=spid;
this.stuname=stuname;
this.sex=sex;
this.banji=banji;
this.ye=ye;
}
}
Stu.java
package Javabean;
public class Stu {
private int id;
private String spid;
private String stuname;
private String sex;
private String banji;
private String ye;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getSpid() {
return spid;
}
public void setSpid(String spid) {
this.spid = spid;
}
public String getStuname() {
return stuname;
}
public void setStuname(String stuname) {
this.stuname = stuname;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getBanji() {
return banji;
}
public void setBanji(String banji) {
this.banji = banji;
}
public String getYe() {
return ye;
}
public void setYe(String ye) {
this.ye = ye;
}
public Stu() { }
public Stu(int id,String spid,String stuname,String sex,String banji,String ye) {
this.id=id;
this.spid=spid;
this.stuname=stuname;
this.sex=sex;
this.banji=banji;
this.ye=ye;
}
public Stu(String spid,String stuname,String sex,String banji,String ye) {
this.spid=spid;
this.stuname=stuname;
this.sex=sex;
this.banji=banji;
this.ye=ye;
}
}
Teacher.java
package Javabean;
public class Teacher {
private int id;
private String tpid;
private String teaname;
private String sex;
private String txueyuan;
private String zhicheng;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTpid() {
return tpid;
}
public void setTpid(String tpid) {
this.tpid = tpid;
}
public String getTeaname() {
return teaname;
}
public void setTeaname(String teaname) {
this.teaname = teaname;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getTxueyuan() {
return txueyuan;
}
public void setTxueyuan(String txueyuan) {
this.txueyuan = txueyuan;
}
public String getZhicheng() {
return zhicheng;
}
public void setZhicheng(String zhicheng) {
this.zhicheng = zhicheng;
}
public Teacher() { }
public Teacher(int id,String tpid,String teaname,String sex,String txueyuan,String zhicheng) {
this.id=id;
this.tpid=tpid;
this.teaname=teaname;
this.sex=sex;
this.txueyuan=txueyuan;
this.zhicheng=zhicheng;
}
public Teacher(String tpid,String teaname,String sex,String txueyuan,String zhicheng) {
this.tpid=tpid;
this.teaname=teaname;
this.sex=sex;
this.txueyuan=txueyuan;
this.zhicheng=zhicheng;
}
}
xuankeServlet.java
package xuankeServlet;
import java.io.IOException;
import java.util.List;
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 Dao.Dao;
import Javabean.Cou;
import Javabean.Jibenxinxi;
import Javabean.Stu;
import Javabean.Teacher;
@WebServlet("/xuankeServlet")
public class xuankeServlet extends HttpServlet{
/**
* 特有id号
*/
private static final long serialVersionUID = 1L;
Dao dao = new Dao();
/**
* 方法选择
* @return
* @throws IOException
* @throws ServletException
*/
protected void service(HttpServletRequest req,HttpServletResponse resp) throws ServletException, IOException
{
req.setCharacterEncoding("utf-8");
String method = req.getParameter("method");
if("login".equals(method)) {
login(req,resp);
}else if("addtea".equals(method)) {
addtea(req,resp);
}else if("addstu".equals(method)) {
addstu(req,resp);
}else if("addcou".equals(method)) {
addcou(req,resp);
}else if("updatetea".equals(method)) {
updatetea(req,resp);
}else if("updatestu".equals(method)) {
updatestu(req,resp);
}else if("liulankecheng".equals(method)) {
liulankecheng(req,resp);
}else if("chakan".equals(method)) {
chakan(req,resp);
}else if("xuanke".equals(method)) {
xuanke(req,resp);
}else if("liulankecheng1".equals(method)) {
liulankecheng1(req,resp);
}else if("liulanstu".equals(method)) {
liulanstu(req,resp);
}
}
private void login(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
req.setCharacterEncoding("utf-8");
String username = req.getParameter("username");
String password=req.getParameter("password");
int pid=dao.searchPid(username,password);
System.out.println(pid);
if(pid==1) {
String teaname=dao.searchteaname(username);
System.out.println(teaname);
req.getSession().setAttribute("username", username);
req.getSession().setAttribute("teaname", teaname);
}
if(pid==2) {
req.getSession().setAttribute("username1", username);
}
req.setAttribute("pid", pid);
req.getRequestDispatcher("houtai.jsp").forward(req, resp);
}
private void addtea(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
String tpid = req.getParameter("tpid");
String teaname = req.getParameter("teaname");
String sex = req.getParameter("sex");
String txueyuan = req.getParameter("txueyuan");
String zhicheng = req.getParameter("zhicheng");
int pid=1;
String password = "123456";
Teacher teacher=new Teacher(tpid,teaname,sex,txueyuan,zhicheng);
if(dao.addtea(teacher)&&dao.adduser(tpid,password,pid)) {
req.setAttribute("teacher",teacher);
req.setAttribute("message","添加成功" );
req.getRequestDispatcher("addtea.jsp").forward(req, resp);
}else {
req.setAttribute("message","老师姓名重复，请重新输入" );
req.getRequestDispatcher("addtea.jsp").forward(req, resp);
}
}
private void addstu(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
String spid = req.getParameter("spid");
String stuname = req.getParameter("stuname");
String sex = req.getParameter("sex");
String banji = req.getParameter("banji");
String ye = req.getParameter("ye");
Stu stu=new Stu(spid,stuname,sex,banji,ye);
int pid=2;
String password="123456";
if(dao.addstu(stu)&&dao.adduser(spid, password, pid)) {
req.setAttribute("stu",stu);
req.setAttribute("message","添加成功" );
req.getRequestDispatcher("addstu.jsp").forward(req, resp);
}else {
req.setAttribute("message","学生姓名重复，请重新输入" );
req.getRequestDispatcher("addstu.jsp").forward(req, resp);
}
}
private void addcou(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
String jiaoshi=(String) req.getSession().getAttribute("teaname");
String cpid = req.getParameter("cpid");
String cname = req.getParameter("cname");
int num = Integer.parseInt(req.getParameter("num"));
int snum=0;
System.out.println(jiaoshi);
Cou cou=new Cou(cpid,cname,num,snum,jiaoshi);
if(dao.addcou(cou)) {
req.setAttribute("cou",cou);
req.setAttribute("message","添加成功" );
req.getRequestDispatcher("addcourse.jsp").forward(req, resp);
}else {
req.setAttribute("message","课程信息重复，请重新输入" );
req.getRequestDispatcher("addcourse.jsp").forward(req, resp);
}
}
private void updatetea(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
String tpid=(String) req.getSession().getAttribute("username");
String teaname = req.getParameter("teaname");
String sex = req.getParameter("sex");
String txueyuan = req.getParameter("txueyuan");
String zhicheng = req.getParameter("zhicheng");
Teacher teacher=new Teacher(tpid,teaname,sex,txueyuan,zhicheng);
if(dao.updatetea(teacher)) {
req.setAttribute("message","修改成功" );
req.getRequestDispatcher("updatet.jsp").forward(req, resp);
} else {
req.setAttribute("message","修改失败" );
req.getRequestDispatcher("updatet.jsp").forward(req, resp);
}
}
private void updatestu(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
String spid =(String) req.getSession().getAttribute("username1");
String stuname = req.getParameter("stuname");
String sex = req.getParameter("sex");
String banji = req.getParameter("banji");
String ye = req.getParameter("ye");
Stu stu=new Stu(spid,stuname,sex,banji,ye);
if(dao.updatestu(stu)) {
req.setAttribute("message","修改成功" );
req.getRequestDispatcher("updates.jsp").forward(req, resp);
} else {
req.setAttribute("message","修改失败" );
req.getRequestDispatcher("updates.jsp").forward(req, resp);
}
}
private void liulankecheng(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
List<Cou> cous = dao.liulankecheng();
req.setAttribute("cous", cous);
req.getRequestDispatcher("liulankecheng.jsp").forward(req, resp);
}
private void chakan(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
int id = Integer.parseInt(req.getParameter("id"));
Cou cou=dao.searchByid(id);
req.getSession().setAttribute("id", id);
req.setAttribute("cou", cou);
req.getRequestDispatcher("chakankecheng.jsp").forward(req, resp);
}
private void xuanke(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
String spid =(String) req.getSession().getAttribute("username1");
String cpid = req.getParameter("cpid");
int snum = Integer.parseInt(req.getParameter("snum"))+1;
String jiaoshi = req.getParameter("jiaoshi");
int id =(int) req.getSession().getAttribute("id");
String tpid=dao.searchtpid(jiaoshi);
Stu stu = dao.searchstu(spid);
System.out.println(id);
if(dao.updatecou(id,snum)&&dao.addjiben(cpid,tpid,spid,stu)) {
req.setAttribute("message","选课成功" );
req.getRequestDispatcher("sucess.jsp").forward(req, resp);
} else {
req.setAttribute("message","选课失败" );
req.getRequestDispatcher("sucess.jsp").forward(req, resp);
}
}
private void liulankecheng1(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
List<Cou> cous = dao.liulankecheng1();
req.setAttribute("cous", cous);
req.getRequestDispatcher("liulankecheng1.jsp").forward(req, resp);
}
private void liulanstu(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String tpid=(String) req.getSession().getAttribute("username");
List<Jibenxinxi> jibens = dao.searchstuinfo(tpid);
req.setAttribute("jibens",jibens);
req.getRequestDispatcher("liulanstu.jsp").forward(req, resp);
}
}
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