加入Joda-Time，并实现时间公共类，后期根据需要可以在TimeUtil类中继续拓展

pom.xml

@@ -220,6 +220,13 @@
       <version>2.3.2</version>
     </dependency>
 
+    <!--joda-time框架-->
+    <dependency>
+      <groupId>joda-time</groupId>
+      <artifactId>joda-time</artifactId>
+      <version>2.9.7</version>
+    </dependency>
+
   </dependencies>
   <build>
     <finalName>ssmshiro</finalName>

src/main/java/web/CaptchaController.java → src/main/java/kcaptcha/CaptchaController.java

@@ -1,4 +1,4 @@
-package web;
+package kcaptcha;
 
 import com.google.code.kaptcha.Constants;
 import com.google.code.kaptcha.Producer;

src/main/java/service/impl/ShiroUserServiceImpl.java

@@ -2,15 +2,9 @@
 
 import dao.ShiroUserDao;
 import entity.User;
-import org.apache.shiro.authc.LockedAccountException;
-import org.apache.shiro.authc.UnknownAccountException;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
 import service.ShiroUserService;
-import util.MD5Util;
-
-import java.util.List;
 
 /**
  * Created by xuweijie on 2017/3/6.

src/main/java/util/DateTime/TimeUtil.java

@@ -0,0 +1,54 @@
+package util.DateTime;
+
+import org.joda.time.DateTime;
+import org.joda.time.LocalDate;
+
+/**
+ * Created by xuweijie on 2017/3/8.
+ * 日期公共类,单例模式(双重检查加锁，可以大大减少getInstance()的同步问题所带来的时间耗费)
+ */
+public class TimeUtil {
+
+    private volatile static TimeUtil timeUtil;
+    private DateTime dateTime;
+
+    public static TimeUtil getInstance(){
+        if(timeUtil==null){
+            synchronized (TimeUtil.class){
+                if(timeUtil==null){
+                    timeUtil=new TimeUtil();
+                }
+            }
+        }
+        return timeUtil;
+    }
+
+    //自定义表示的某个时刻的时间（具体到时分秒）
+    public String GetTimeAtPoin(int year,int month,int day,int hour,int min,int sec){
+        dateTime=new DateTime(year,month,day,hour,min,sec);
+        return dateTime.toString("yyyy/MM/dd HH:mm:ss EE");
+    }
+
+    public String GetTimeAtPoin(int year,int month,int day){
+        dateTime=new DateTime(year,month,day,0,0,0);
+        return dateTime.toString("yyyy/MM/dd EE");
+    }
+
+    //在某个日期上加上xx天（如：在当前日期加上90天）（具体到时分秒）
+    public String GetTimeAtPoin(int year,int month,int day,int hour,int min,int sec,int additionalTime){
+        dateTime=new DateTime(year,month,day,hour,min,sec);
+        return dateTime.plusDays(additionalTime).toString("yyyy/MM/dd HH:mm:ss EE");
+    }
+
+    public String GetTimeAtPoin(int year,int month,int day,int additionalTime){
+        dateTime=new DateTime(year,month,day,0,0,0);
+        return dateTime.plusDays(additionalTime).toString("yyyy/MM/dd EE");
+    }
+
+
+    //获取当前时间
+    public String CurrentTime(){
+        return dateTime.toString("yyyy/MM/dd HH:mm:ss EE");
+    }
+
+}

src/main/java/util/MD5Util.java → src/main/java/util/Encryption/MD5Util.java

@@ -1,9 +1,10 @@
-package util;
+package util.Encryption;
 
 import org.apache.shiro.crypto.hash.Md5Hash;
 
 /**
  * Created by xuweijie on 2017/3/6.
+ * MD5+salt对数据进行加密
  */
 public class MD5Util {
     //shiro提供的MD5加密方法，其中salt是自定义的字符串

src/main/java/web/LoginController.java

@@ -24,6 +24,7 @@ public String login(HttpServletRequest request, Model model){
         String verifyCode=request.getParameter("verifyCode").toUpperCase();
         String username=request.getParameter("username");
         String password=request.getParameter("password");
+        //判断验证码输入是否正确
         if(verifyCode.equals(request.getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY))){
             if((username!=null && password!=null)){
                 UsernamePasswordToken token=new UsernamePasswordToken(username,password);

src/main/resources/spring/spring-web.xml

@@ -28,6 +28,6 @@
 
     <!--4:扫描web相关的controller-->
     <context:component-scan base-package="web"/>
-
+    <context:component-scan base-package="kcaptcha"/>
 
 </beans>

src/test/java/testmd5.java

@@ -1,5 +1,5 @@
 import org.junit.Test;
-import util.MD5Util;
+import util.Encryption.MD5Util;
 
 /**
  * Created by xuweijie on 2017/3/7.

src/test/java/timetest.java

@@ -0,0 +1,23 @@
+import org.joda.time.DateTime;
+import org.junit.Test;
+import util.DateTime.TimeUtil;
+
+/**
+ * Created by xuweijie on 2017/3/8.
+ */
+public class timetest {
+
+    @Test
+    public void testtime(){
+
+        String time=TimeUtil.getInstance().GetTimeAtPoin(2017,3,8,23,33,56);
+        System.out.println("某一时刻的时间："+time);
+        String currenttime=TimeUtil.getInstance().CurrentTime();
+        System.out.println("当前时间："+currenttime);
+        String addtime=TimeUtil.getInstance().GetTimeAtPoin(2017,3,8,23,33,56,90);
+        System.out.println("某一时刻的时间+加上90天："+addtime);
+        String time1=TimeUtil.getInstance().GetTimeAtPoin(2017,3,8);
+        System.out.println("某一时刻的时间："+time1);
+
+    }
+}