2020-09-24

程序员文章站 2022-04-20 21:54:08

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MyScipse基础**

2020-09-24
ReqServlet.java
package org.lzl;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.lzl.util.DBUtil;

public class RegServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException {
	
	doPost(request, response);
}



public void doPost(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException {
	//首先全部编码改为utf-8
	//将请求中的编码设置为utf-8
	request.setCharacterEncoding("utf-8");
	//将响应中的编码设置为utf-8
	response.setCharacterEncoding("utf-8");
	//设置响应的显示格式（类型）
	response.setContentType("text/json");
	
	String name = request.getParameter("name");
	String pwd = request.getParameter("pwd");
	String userName = request.getParameter("userName");
	String ageStr = request.getParameter("ageStr");
	//将ageStri类型转换
	Integer age = Integer.parseInt(ageStr);
	
	
	boolean   isTure = false; 		
	//未来添加的代码区域
	
	
	
	Connection conn =  DBUtil.getConn();
	
	String sql = "insert into users(name,age,pwd,user_name) values(?,?,?,?)";
	
	
	PreparedStatement ps = null;
	//注册业务--》新增-->
	
	try {
		ps=conn.prepareStatement(sql);
		ps.setString(1, name);
		ps.setInt(2, age);
		ps.setString(3, pwd);
		ps.setString(4, userName);
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	try {
		int count = ps.executeUpdate();
		
		if(count>0){
			
			isTure = true;
		}else{
			isTure = false;
			
		}
		
		
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	
	DBUtil.close(conn, ps, null);
	
	
	//处理响应
	
	
	
	
	
	
	PrintWriter out = response.getWriter();
	out
			.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
	out.println("<HTML>");
	out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
	out.println("  <BODY>");
	
	if(isTure){
		
		out.println("<h1  style = 'color:green'>注册成功！</h1>");
	}else{
		
		out.println("<h1  style = 'color:red'>注册失败！</h1>");
	}
	
	out.println("  </BODY>");
	out.println("</HTML>");
	out.flush();
	out.close();
}

}

DBUtil
package org.lzl.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class DBUtil {
private static String driver = “”
+ “com.microsoft.sqlserver.jdbc.SQLServerDriver”;

private static String url = ""
		+ "jdbc:sqlserver://localhost:1433;databaseName=school";
static {
	try {
		Class.forName(driver);
	} catch (ClassNotFoundException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
}

public static Connection getConn() {
	Connection conn = null;
	try {
		conn = DriverManager.getConnection(url, "sa", "1");
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	return conn;
}

public static void close(Connection conn, PreparedStatement ps, ResultSet rs) {

	try {
		if (conn != null) {
			conn.close();
		}
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}

	try {
		if (ps != null) {
			ps.close();
		}
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}

	try {
		if (rs != null) {
			rs.close();
		}
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}

}

}

index,jsp
<%@ page language=“java” import=“java.util.*” pageEncoding=“utf-8”%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"????/"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">    
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->

用户名：
密码：

  确认密码：    <input   type ="password"   name="pwd"/>

姓名：
年龄：

 </body>

web.xml

<?xml version="1.0" encoding="UTF-8"?>

index.jsp

<servlet>
	<servlet-name>login</servlet-name>

	<servlet-class>org.lzl.LoginServlet</servlet-class>
</servlet>
<servlet>
	<description>This is the description of my J2EE component</description>
	<display-name>This is the display name of my J2EE component</display-name>
	<servlet-name>regServlet</servlet-name>
	<servlet-class>org.lzl.RegServlet</servlet-class>
</servlet>

<servlet-mapping>
	<servlet-name>login</servlet-name>
	<url-pattern>/login</url-pattern>
</servlet-mapping>
<servlet-mapping>
	<servlet-name>regServlet</servlet-name>
	<url-pattern>/regServlet</url-pattern>
</servlet-mapping>