1.1簡單示例
/**
* 簡單示例
* @author joedy
*/
public class JedisDemo {
public static void main(String[] args) {
// 構造jedis對象,第一個參數是你的redis服務器的ip地址
Jedis jedis = new Jedis("172.16.116.100", 6379);
// 向redis中添加數據
jedis.set("mytest", "123");
// 從redis中讀取數據
String value = jedis.get("mytest");
System.out.println(value);
// 關閉連接
jedis.close();
}
}
1.2連接池的使用
/**
* Jedis連接池的使用
* @author joedy
*/
public class JedisPoolDemo {
public static void main(String[] args) {
// 構建連接池配置信息
JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
// 設置最大連接數
jedisPoolConfig.setMaxTotal(50);
// 構建連接池
JedisPool jedisPool = new JedisPool(jedisPoolConfig, "172.16.116.100", 6379);
// 從連接池中獲取連接
Jedis jedis = jedisPool.getResource();
// 讀取數據
System.out.println(jedis.get("mytest"));
// 將連接還回到連接池中
jedis.close();
// 釋放連接池
jedisPool.close();
}
}
2.1手機驗證碼
完成一個手機驗證碼功能
要求:
1、輸入手機號,點擊發送後隨機生成6位數字碼,2分鐘有效
2、輸入驗證碼,點擊驗證,返回成功或失敗
3、每個手機號每天只能輸入3次
項目工程環境已經建好
下載地址:https://download.csdn.net/my
2.2發送驗證碼
public class CodeSenderServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public CodeSenderServlet() {
super();
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 1.獲取手機號,並校驗手機號
String phone = request.getParameter("phone_no");
if (phone == null) {
return ;
}
// 2.生成6位隨機驗證碼
String code = generatedCode(VerifyCodeConfig.CODE_LEN);
// 3.保存到redis服務器,並設置有效時間是2分鐘
Jedis jedis = new Jedis("172.16.116.100", 6379);
jedis.setex(VerifyCodeConfig.CODE_PREFIX + phone, VerifyCodeConfig.CODE_TIMEOUT, code);
//jedis.ping();
jedis.close();
// 4.發送短信給用戶
System.out.println("短信發送成功:" + code);
// 5.響應true,注意不要使用println方法
response.getWriter().print(true);
}
private String generatedCode(int len) {
String code = "";
for (int i = 0; i < len; i++) {
int rand = new Random().nextInt(10);
code += rand;
}
return code;
}
}
2.3驗證驗證碼
public class CodeVerifyServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public CodeVerifyServlet() {
super();
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 獲取手機號和驗證碼
String phone = request.getParameter("phone_no");
String verifyCode = request.getParameter("verify_code");
// 判斷手機號和驗證碼是否爲null
if (phone == null || verifyCode == null) {
return ;
}
// 查詢redis中的驗證碼
Jedis jedis = new Jedis("172.16.116.100", 6379);
String phoneCode = jedis.get(VerifyCodeConfig.CODE_PREFIX + phone);
jedis.close();
// 判斷用戶輸入的驗證碼和redis中的驗證碼是否一致
if (verifyCode.equals(phoneCode)) {
// 響應
response.getWriter().print(true);
}
}
}
2.4限定次數
public class CodeSenderServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public CodeSenderServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
@SuppressWarnings("resource")
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Jedis jedis = new Jedis("192.168.157.100", 6379);
// 1.獲取用戶的電話號碼
String phone = request.getParameter("phone_no");
// 進行判空
if (phone == null || phone.trim() == "") {
return;
}
String count = VerifyCodeConfig.PHONE_PREFIX + phone + VerifyCodeConfig.COUNT_SUFFIX;
if (jedis.exists(count) && (jedis.get(count) == null
|| Integer.parseInt(jedis.get(count)) >= VerifyCodeConfig.COUNT_TIMES_1DAY)) {
// 返回limit前臺頁面會做驗證
response.getWriter().print("limit");
return;
/*
* System.out.println("你超過次數了"); return ;
*/
}
// 2.生成6位隨機驗證碼
String code = getCode(VerifyCodeConfig.CODE_LEN);
// 3.保存到redis服務器,並設置有效時間是兩分鐘
jedis.setex(VerifyCodeConfig.PHONE_PREFIX + phone, VerifyCodeConfig.CODE_TIMEOUT, code);
// 4.發送短信給客戶
System.out.println("短信發送成功:" + code);
// 如果沒有存在就設置一個進去
if (!jedis.exists(count)) {
jedis.set(count, "0");
}
// 每發送一次驗證碼就加1
jedis.incr(count);
System.out.println(jedis.get(count));
// 響應true,注意不要使用println方法
jedis.close();
response.getWriter().print("true");
}
private String getCode(int len) {
String rand = "";
for (int i = 0; i < len; i++) {
rand += new Random().nextInt(9);
}
return rand;
/*
* String code=""; for (int i = 0; i < len; i++) { int rand= new
* Random().nextInt(10); code+=rand; }
*
* return code;
*/
}
}
效果