《云博客》-------------version2.0（封笔）
最后一次写这个项目了，连续写了几天，想吐，不干了。
本次版本说是加一个拦截器，但是需要session 的存储，太麻烦。不干了，就加一个验证码登录，还有布局的更正。
look，为了防止刷机，所以连夜加一个验证码。每一次刷新页面，就可以刷新验证码。其实按道理说每点击一下就刷新验证码。 也算一个需要改进的地方，但是罢工了不干了，雷晕了。
什么信息都不输入的话，校验信息提示失败。
注册成功了。
接下来可以进行登录，，
点击超链接，进行登陆界面。
平台的主界面：
剩下的和1的version差不多，没有太大的差别，可以参考一下。
点击链接，可以查看1的版本；
链接
上代码：
本代码部分大部分是实现的前后端分离，也有少许部分尚待处理。但是不做了。累；
Servlet01.java
package servlets;
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 java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
@WebServlet("/s01")
public class Servlet01 extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
String id = request.getParameter("delettext");
try {
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
System.out.println("delete Successful!");
String sql = "DELETE FROM we WHERE class =?";
// pst = con.prepareStatement(sql);
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, id);
int flag = pstmt.executeUpdate();
PrintWriter out = response.getWriter();
if (flag > 0) {
out.write("删除成功！");
out.write("返回首页 ");
} else {
out.write("删除失败！");
out.write("返回首页 ");
}
con.close();
st.close();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
Servlet02.java
package servlets;
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 java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
@WebServlet("/s02")
public class Servlet02 extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("delettext1");
try {
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
// PreparedStatement pst = null;
System.out.println("delete Successful!");
String sql = "DELETE FROM we WHERE place =?";
// pst = con.prepareStatement(sql);
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, id);
int flag = pstmt.executeUpdate();
PrintWriter out = response.getWriter();
if (flag > 0) {
out.println("删除成功！");
out.print("返回首页 ");
} else {
out.println("删除失败！");
out.print("返回首页 ");
}
con.close();
st.close();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
Servlet03.java
package servlets;
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 java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
@WebServlet("/s03")
public class Servlet03 extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
//获取用户输入信息
request.setCharacterEncoding("utf-8");
// response.setHeader (" content - type ",＂text/ html ; charset = UTF -8");
// response.setHeader("concent-type,text/html;charset=UTF-8");
// response.setCharacterEncoding (" UTF -8"");
response.setCharacterEncoding("UTF-8");
String username = request.getParameter("username");
String userpwd = request.getParameter("userpwd");
Connection conn = null;
Statement stmt = null;
try {
//连接驱动
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
//建立数据库连接
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
//数据库账号
String uname = "root";
//数据库密码
String upwd = "cjd";
try {
conn = DriverManager.getConnection(url, uname, upwd);
//创建发射器
stmt = conn.createStatement();
//创建sql语句
String sql = "select*from test.yonghu where username='" + username + "' and userpwd='" + userpwd + "'";
//发送sql语句并接收结果
ResultSet rs = stmt.executeQuery(sql);
if (rs.next()) {
out.write("登陆成功");
response.sendRedirect("testform01.jsp");
} else {
out.write("登陆失败");
out.write("返回注册 ");
}
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
Servlet04.java
package servlets;
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.http.HttpSession;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
@WebServlet("/s04")
public class Servlet04 extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType( "text/html; charset=UTF-8");
PrintWriter out = response.getWriter();
//获取用户输入信息
// request.setCharacterEncoding("utf-8");
String username=request.getParameter("username");
String userpwd=request.getParameter("userpwd");
String cuserpwd=request.getParameter("cuserpwd");
String code = request.getParameter("code");
//获取session中的验证码
HttpSession session = request.getSession();
String randStr = (String)session.getAttribute("randStr");
// response.setCharacterEncoding("UTF-8");
//判断两次密码是否相同
if (cuserpwd.equals(userpwd) && code.equals(randStr) && username!=null&& !username.equals("") &&
userpwd!=null && !userpwd.equals("") && cuserpwd!=null && !cuserpwd.equals("")) {
Connection conn = null;
Statement stmt = null;
try {
//连接驱动
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
//建立数据库连接
String url="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";;
//数据库账号
String user="root";
//数据库密码
String upwd="cjd";
try {
conn= DriverManager.getConnection(url,user,upwd);
//创建发射器
stmt=conn.createStatement();
//创建sql语句
String sql="insert into yonghu(username,userpwd) value ('"+username+"','"+userpwd+"')";
//发送sql语句并接收结果
int count = stmt.executeUpdate(sql);
if (count>0){
out.write("注册成功");
out.write("登录 ");
}
else{
out.write("验证码或者密码不一致或者账号错误导致注册失败");
out.write("返回注册界面 ");
}
//关闭资源
stmt.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
} else {
out.write("注册失败"+"
");
out.write("返回注册界面 ");
}
}
}
Servlet05.java
package servlets;
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 java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
@WebServlet("/s05")
public class Servlet05 extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
String name = request.getParameter("textname");
String pwd = request.getParameter("u1");
String place = request.getParameter("place");
String time = request.getParameter("time1");
SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd");
Date date = null;
try {
date = new Date(format.parse(time).getTime());
} catch (ParseException e) {
e.printStackTrace();
}
int num = Integer.parseInt(request.getParameter("classuser"));
String textname1 = request.getParameter("textname1");
try {
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
// String sql = "select * from we";
System.out.println("Connection Successful!");
String sql = "Insert into we(name,sex,class,topic,rtime,place) values(?,?,?,?,?,?)";
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, name);
pstmt.setString(2, pwd);
pstmt.setInt(3, num);
pstmt.setString(4, textname1);
pstmt.setDate(5,date);
pstmt.setString(6,place);
int n = pstmt.executeUpdate();
if (n == 1) {out.write("数据插入成功！
");} else {out.write("数据插入失败！");
}
out.write("返回首页 ");
con.close();
st.close();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
Servlet06.java
package servlets;
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 java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
@WebServlet("/s06")
public class Servlet06 extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
String name1 = request.getParameter("updatetext");
String sex1 = request.getParameter("updatesex");
int num1 = Integer.parseInt(request.getParameter("updateclass"));
String topic1 = request.getParameter("updatetopic");
String place = request.getParameter("place1");
String time = request.getParameter("date1");
SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd");
try {
Date date = new Date(format.parse(time).getTime());
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
System.out.println("update Successful!");
// String sql ="update we set sex=?,class=?,topic=? where name=?";
String sql = "update we set sex=?,name=?,topic=?,rtime=?,place=? where class=?";
// pst = con.prepareStatement(sql);
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, sex1);
pstmt.setInt(6, num1);
pstmt.setString(3, topic1);
pstmt.setString(2, name1);
pstmt.setDate(4, date);
pstmt.setString(5, place);
int flag = pstmt.executeUpdate();
if (flag > 0) {
out.write("修改成功！");
out.write("返回主页面 ");
} else {
out.write("修改失败");
out.write("返回主页面 ");
}
con.close();
st.close();
} catch (ParseException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
------------------------------------------------------------------------------------------------------------------------------
后端部分完成。上前端！
delete1.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java"
pageEncoding="UTF-8"
import="java.sql.*"
%>
delete table here
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("delettext");
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
System.out.println("delete Successful!");
String sql = "DELETE FROM we WHERE class =?";
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, id);
int flag = pstmt.executeUpdate();
if (flag > 0) {
out.println("删除成功！");
out.print("返回首页 ");
} else {
out.println("删除失败！");
out.print("返回首页 ");
}
con.close();
st.close();
%>
有些jsp页面尽管没用，但是带上，方便更好的参照
delete2.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/30
Time: 13:20
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java"
pageEncoding="UTF-8"
import="java.sql.*"
%>
Title
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("delettext1");
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
// PreparedStatement pst = null;
System.out.println("delete Successful!");
String sql = "DELETE FROM we WHERE place =?";
// pst = con.prepareStatement(sql);
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, id);
int flag = pstmt.executeUpdate();
if (flag > 0) {
out.println("删除成功！");
out.print("返回首页 ");
} else {
out.println("删除失败！");
out.print("返回首页 ");
}
con.close();
st.close();
%>
delete101.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/29
Time: 11:37
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
help.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/29
Time: 14:49
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
敬请期待。。。。。。。。
<%
out.print("返回首页 ");
%>
logoin.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
logoin
个人云博客在线平台
logoin_yz.jsp
<%@ page import="java.sql.*" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
个人云博客在线平台
<%
//获取用户输入信息
request.setCharacterEncoding("utf-8");
// response.setHeader (" content - type ",＂text/ html ; charset = UTF -8");
// response.setHeader("concent-type,text/html;charset=UTF-8");
// response.setCharacterEncoding (" UTF -8"");
response.setCharacterEncoding("UTF-8");
String username=request.getParameter("username");
String userpwd=request.getParameter("userpwd");
// if ((username==null || username.equals("")||(userpwd.equals("")||userpwd==null)) ){
// out.print("登陆失败");
// out.print("返回注册 ");
// }
Connection conn = null;
Statement stmt = null;
try {
//连接驱动
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
//建立数据库连接
String url = "jdbc:mysql://localhost:3306/test";
//数据库账号
String uname="root";
//数据库密码
String upwd="cjd";
try {
conn = DriverManager.getConnection(url, uname, upwd);
//创建发射器
stmt = conn.createStatement();
//创建sql语句
String sql = "select*from test.yonghu where username='"+username+"' and userpwd='"+userpwd+"'";
//发送sql语句并接收结果
ResultSet rs = stmt.executeQuery(sql);
if (rs.next()) {
out.print("登陆成功");
response.sendRedirect("testform01.jsp");
} else {
out.print("登陆失败");
out.print("返回注册 ");
}
rs.close();
}
catch (SQLException e) {
e.printStackTrace();
}
%>
registered.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
注册
个人云博客在线平台
Show.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"
import="java.sql.*"
%>
Insert title here
个人云博客在线平台
<%
//star
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String name5 = request.getParameter("showtext");
Class.forName("com.mysql.jdbc.Driver");
String url ="jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
request.setCharacterEncoding("UTF-8");
// Statement st = con.createStatement();
// WHERE name ="+name5;
out.print(name5);
String sql = "SELECT * FROM we where class =?";
PreparedStatement preparedStatement = con.prepareStatement(sql);
preparedStatement.setString(1,name5);
ResultSet resultSet = preparedStatement.executeQuery();
resultSet.last();
%>
你要查询的日志数据表中共有
<%=resultSet.getRow()%>条
记录条数
日志题目
天气
日志序号
日志内容
时间
地区
<%
resultSet.beforeFirst();
while (resultSet.next()){
%>
<%=resultSet.getRow()%>
<%=resultSet.getString("name")%>
<%=resultSet.getString("sex")%>
<%=resultSet.getInt("class")%>
<%=resultSet.getString("topic")%>
<%=resultSet.getString("rtime")%>
<%=resultSet.getString("place")%>
<%}%>
<%
if (resultSet!=null){
resultSet.close();
}
if (preparedStatement!=null){
preparedStatement.close();
}
if (con!=null){
con.close();
}
%>
<%
out.print(" "+" "+" "+" "+"返回首页 ");
%>
Show01.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/29
Time: 11:43
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
Show.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/30
Time: 13:16
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java"
pageEncoding="UTF-8"
import="java.sql.*"
%>
Title
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String name5 = request.getParameter("showtext1");
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
request.setCharacterEncoding("UTF-8");
out.print(name5);
String sql = "SELECT * FROM `we`WHERE place = ?";
PreparedStatement preparedStatement = con.prepareStatement(sql);
preparedStatement.setString(1, name5);
ResultSet resultSet = preparedStatement.executeQuery();
resultSet.last();
%>
你要查询的日志数据表中共有
<%=resultSet.getRow()%>
条
记录条数
日志题目
天气
地区
时间
日志序号
日志内容
<%
resultSet.beforeFirst();
while (resultSet.next()) {
%>
<%=resultSet.getRow()%>
<%=resultSet.getString("name")%>
<%=resultSet.getString("sex")%>
<%=resultSet.getInt("class")%>
<%=resultSet.getString("topic")%>
<%=resultSet.getString("rtime")%>
<%=resultSet.getString("place")%>
<%}%>
<%
if (resultSet != null) {
resultSet.close();
}
if (preparedStatement != null) {
preparedStatement.close();
}
if (con != null) {
con.close();
}
%>
<%
out.print(" " + " " + " " + " " + "返回首页 ");
%>
test.jsp
<%@ page language="java"
pageEncoding="UTF-8"
import="java.sql.*"
%>
<%@ page import="java.text.SimpleDateFormat" %>
Insert title here
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String name = request.getParameter("textname");
String pwd = request.getParameter("u1");
String place = request.getParameter("place");
String time = request.getParameter("time1");
SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd");
java.sql.Date date = new java.sql.Date(format.parse(time).getTime());
int num = Integer.parseInt(request.getParameter("classuser"));
String textname1 = request.getParameter("textname1");
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
// String sql = "select * from we";
System.out.println("Connection Successful!");
String sql = "Insert into we(name,sex,class,topic,rtime,place) values(?,?,?,?,?,?)";
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, name);
pstmt.setString(2, pwd);
pstmt.setInt(3, num);
pstmt.setString(4, textname1);
pstmt.setDate(5,date);
pstmt.setString(6,place);
int n = pstmt.executeUpdate();
if (n == 1) {%>数据插入成功！
<%} else {%>数据插入失败！
<%
}
out.print("返回首页 ");
con.close();
st.close();
%>
test01.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/29
Time: 11:28
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
%>
testform01.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/29
Time: 11:18
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
个人云博客在线平台主页面
Update1.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/4/17
Time: 15:46
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" import="java.sql.*" %>
<%@ page import="java.text.SimpleDateFormat" %>
update table here
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String name1 = request.getParameter("updatetext");
String sex1 = request.getParameter("updatesex");
int num1 = Integer.parseInt(request.getParameter("updateclass"));
String topic1 = request.getParameter("updatetopic");
String place = request.getParameter("place1");
String time = request.getParameter("date1");
SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd");
java.sql.Date date = new java.sql.Date(format.parse(time).getTime());
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";
String un = "root"; //MySql用户名
String pa = "cjd"; //MySql密码
Connection con = DriverManager.getConnection(url, un, pa);
Statement st = con.createStatement();
System.out.println("update Successful!");
// String sql ="update we set sex=?,class=?,topic=? where name=?";
String sql = "update we set sex=?,name=?,topic=?,rtime=?,place=? where class=?";
// pst = con.prepareStatement(sql);
PreparedStatement pstmt = con.prepareStatement(sql);
pstmt.setString(1, sex1);
pstmt.setInt(6, num1);
pstmt.setString(3, topic1);
pstmt.setString(2, name1);
pstmt.setDate(4, date);
pstmt.setString(5, place);
int flag = pstmt.executeUpdate();
if (flag > 0) {
out.println("修改成功！");
out.print("返回主页面 ");
} else {
out.println("修改失败");
out.print("返回主页面 ");
}
con.close();
st.close();
%>
Update101.jsp
<%--
Created by IntelliJ IDEA.
User: ${陈平安}
Date: 2022/5/29
Time: 11:46
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
个人云博客在线平台
<%
request.setCharacterEncoding("UTF-8");
%>
validate.jsp
<%@ page language="java"
import="java.awt.*"
import="java.awt.image.BufferedImage"
import="java.util.*"
import="javax.imageio.ImageIO"
pageEncoding="utf-8" contentType="text/html;charset=UTF-8"
%>
<%
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.setHeader("Cache-Control","no-cache");
// 在内存中创建图象
int width = 60, height = 20;
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
//获取画笔
Graphics g = image.getGraphics();
//设定背景色
g.setColor(new Color(200, 200, 200));
g.fillRect(0, 0, width, height);
//取随机产生的验证码(4位数字)
Random rnd = new Random();
int randNum = rnd.nextInt(8999) + 1000;
String randStr = String.valueOf(randNum);
//将验证码存入session
session.setAttribute("randStr", randStr);
//将验证码显示到图象中
g.setColor(Color.black);
g.setFont(new Font("", Font.PLAIN, 20));
g.drawString(randStr, 10, 17);
// 随机产生100个干扰点，使图象中的验证码不易被其他程序探测到
for (int i = 0; i < 100; i++){
int x = rnd.nextInt(width);
int y = rnd.nextInt(height);
g.drawOval(x, y, 1, 1);
}
// 输出图象到页面
ImageIO.write(image, "JPEG", response.getOutputStream());
out.clear();
out = pageContext.pushBody();
%>
zc.jsp
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.DriverManager" %>
<%@ page import="java.sql.SQLException" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
个人云博客在线平台
<%
//获取用户输入信息
request.setCharacterEncoding("utf-8");
String username = request.getParameter("username");
String userpwd = request.getParameter("userpwd");
String cuserpwd = request.getParameter("cuserpwd");
//判断两次密码是否相同
if (cuserpwd.equals(userpwd)) {
Connection conn = null;
Statement stmt = null;
try {
//连接驱动
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
//建立数据库连接
String url = "jdbc:mysql://localhost:3306/test";
//数据库账号
String user = "root";
//数据库密码
String upwd = "cjd";
try {
conn = DriverManager.getConnection(url, user, upwd);
//创建发射器
stmt = conn.createStatement();
//创建sql语句
String sql = "insert into yonghu(username,userpwd) value ('" + username + "','" + userpwd + "')";
//发送sql语句并接收结果
int count = stmt.executeUpdate(sql);
if (count > 0) {
out.print("注册成功");
out.print("登录 ");
} else {
out.print("注册失败");
out.print("返回注册界面 ");
}
//关闭资源
stmt.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
} else if (username == null || cuserpwd == null || username.equals("") || cuserpwd.equals("") ||
userpwd == null || userpwd.equals("")) {
out.print("注册失败" + "
");
out.print("返回注册界面 ");
} else {
out.print("注册失败" + "
");
out.print("返回注册界面 ");
}
%>)
数据库建表；
