javaServlet+tomcat+mysql简单登陆注册web测试环境搭建
- 配置Eclipse的web运行服务器
window–>preference–>server–>runtime enviroment–>add 然后选择自己本机的tomcat。前提是本地要下载有tomcat eclipse创建Dynamic web project
输入我的工程名LoginServlet，然后next 记得选上创建web.xml 也可以后面再创建。在webcontent下面新建一个index.html
就是两个form一个登陆，一个用户注册。对应两个servlet
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>登录title>
head>
<body>
<form action="http://localhost:8080/LoginServlet/LoginServlet" method="post">
用户：<input type="text" name="username" /><br/>
密码：<input type="password" name="password" /><br/>
<input type="submit" value="登录" />
form>
<form action="http://localhost:8080/LoginServlet/RegisterServlet" method="post">
用户：<input type="text" name="username" /><br/>
密码：<input type="password" name="password" /><br/>
<input type="submit" value="注册" />
form>
body>
html> 在javaResource目录下创建对应的LoginServlet和RegisterServlet
LoginServlet代码如下，其中调用了UserRegister类里面的LonginCheck()方法，对页面输入的用户名和密码进行验证
//引入所需要的包
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class LoginServlet extends HttpServlet {
//重写doGet方法
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException,
IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
UserRegister ur = new UserRegister();
boolean b = ur.LonginCheck(username, password);
System.out.println(b);
//服务器端打印信息
response.setContentType("text/html;charset=GB18030");
//返回html页面
response.getWriter().println("");
response.getWriter().println("");
response.getWriter().println("登录信息 ");
response.getWriter().println("");
response.getWriter().println("");
if(b){
response.getWriter().println("欢迎【" + username + "】用户登录成功！！！");
}else
{
response.getWriter().println("登陆失败");
}
response.getWriter().println("");
response.getWriter().println("");
System.out.println("yeee");
}
//重写doPost方法
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException,
IOException {
doGet(request, response);
}
}
RegisterServlet的代码如下
其中调用了UserRegister类里面的regist()方法进行注册。其实就是往数据库里面插入一条数据
//引入所需要的包
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class RegisterServlet extends HttpServlet {
//重写doGet方法
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException,
IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
UserRegister tb = new UserRegister();
// TestConnDb tb = new TestConnDb();
UserBean ub =new UserBean();
ub.setUserId(username);
ub.setPassword(password);
tb.setUserBean(ub);
try {
tb.regist();
//服务器端打印信息
//System.out.println("username=" + username);
//System.out.println("password=" + password);
//设置编码格式
response.setContentType("text/html;charset=GB18030");
//返回html页面
response.getWriter().println("");
response.getWriter().println("");
response.getWriter().println("登录信息 ");
response.getWriter().println("");
response.getWriter().println("");
response.getWriter().println(username + "注册成功");
response.getWriter().println("");
response.getWriter().println("");
System.out.println("yeee");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//重写doPost方法
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException,
IOException {
doGet(request, response);
}
}然后就是操作数据库的类，也是直接创建在SRC下面就OK了，主要是连接数据库，进行注册和密码校验操作。这里用到了UserBean类。里面提供了一个测试的main方法，可进行测试连接数据库操作是否正确
import com.mysql.jdbc.Driver;
import java.sql.*;
public class UserRegister
{
private UserBean userBean;
private Connection con;
//获得数据库连接。
public UserRegister()
{
String url="jdbc:mysql://192.168.1.107/"+"test"+"?user="+"root"+"&password="+"test";
try
{
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection(url);
}
catch(Exception e)
{
e.printStackTrace();
}
}
//设置待注册的用户信息。
public void setUserBean(UserBean userBean)
{
this.userBean=userBean;
}
//进行注册
public void regist() throws Exception
{
String reg="insert into userinfo(userid,password) values(?,?)";
try
{
PreparedStatement pstmt=con.prepareStatement(reg);
pstmt.setString(1,userBean.getUserId());
pstmt.setString(2,userBean.getPassword());
pstmt.executeUpdate();
}
catch(Exception e)
{
e.printStackTrace();
throw e;
}
}
//登陆校验
public boolean LonginCheck(String username,String password){
try {
Statement stmt=con.createStatement();
String sql="select * from userinfo where userid='"+username+"';";
ResultSet rs=stmt.executeQuery(sql);
if(rs.next())
{
String passwordR=new String(rs.getString("password"));
// System.out.println(passwordR);
if(passwordR.equals(password)){
System.out.println(passwordR);
return true;
}else{
return false;
}
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}
//测试
// public static void main(String[] args) {
// UserRegister ur = new UserRegister();
//// UserBean ub = new UserBean();
//// ub.setUserId("te");
//// ub.setPassword("te1");
//// ur.setUserBean(ub);
//// try {
//// ur.regist();
//// } catch (Exception e) {
//// // TODO Auto-generated catch block
//// e.printStackTrace();
//// }
// System.out.println(ur.LonginCheck("te", "te1"));
//// System.out.println(ur.LonginCheck("u1", "pwd1"));
//
//
// }
}
userbean类的代码如下
public class UserBean
{
private String userid;
private String password;
public void setUserId(String userid)
{
this.userid=userid;
}
public void setPassword(String password)
{
this.password=password;
}
public String getUserId()
{
return this.userid;
}
public String getPassword()
{
return this.password;
}
}
最后是web-inf下面的web.xml配置了
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:web="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
<servlet>
<servlet-name>MyServletservlet-name>
<servlet-class>LoginServletservlet-class>
servlet>
<servlet-mapping>
<servlet-name>MyServletservlet-name>
<url-pattern>/LoginServleturl-pattern>
servlet-mapping>
<servlet>
<servlet-name>MyServlet1servlet-name>
<servlet-class>RegisterServletservlet-class>
servlet>
<servlet-mapping>
<servlet-name>MyServlet1servlet-name>
<url-pattern>/RegisterServleturl-pattern>
servlet-mapping>
web-app>在工程名上右键，run as –>run on server
运行结果：
注册：test1 密码：test11
登陆验证一下：
数据库验证userinfo里面插入了一条数据：
这样一个简单的登陆和注册的javaServle+tomcat+mysql的测试环境就搭建好了
备注：
搭建过程中遇到的一些问题：
1 没有将mysql-connector-java.jar拷贝到tomcat的lib下面导致连接数据库失败
搭建环境如果有用到第三方jar包，记得将对应的jar包拷贝到tomcat的lib下面
2 开始提示注册的servlet找不到，是因为没有在web.xml里面配置对应的servlet，页面与servlet的交互都应该在web.xml里面进行配置
3 连接不上mysql原因是mysql的root用户登录限定在了linux上，需要改成任意主机。具体实现可以百度一下