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byte转String

1

md5/des

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

Cookie[] cookies = request.getCookies();
		if(cookies !=null){
			for(Cookie cookie : cookies)
				if ("token".equals(cookie.getName())){
				byte[] fff = Base64.decodeBase64(cookie.getValue());
				String ddd = DESUlit.decrypt(fff,PASSWORD_CRYPT_KEY);
				String[] str=ddd.split("\\|");
				User user = personService.queryID(str[0]);
				if (user !=null){
					return true;
				}
			}
		}

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前端部分写的这部分图片显示功能代码是怎么体现的。

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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spring-data-jpa中使用redis 序列化之后错误

0

1

springboot

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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视图路径名很长怎么办

1

SSM

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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公司復盤項目想自己使用緩存因爲log4j和slf4j衝突直接報錯無法解決

1

复盘踩坑

class="cursor-pointer"> 详细描述

因爲性能測試不達標所以想給公司的項目加緩存，但是因爲jar包衝突直接報錯，而且我在maven的依賴樹裏面看了一下東西太多改一個根本不管用，不知道怎麽正確給公司的項目加緩存

<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxIdle" value="${redis.maxIdle}" />
        <property name="maxActive" value="${redis.maxActive}" />
        <property name="maxWait" value="${redis.maxWait}" />
        <property name="testOnBorrow" value="${redis.testOnBorrow}" />
    </bean>
    
    <bean id="jedisConnectionFactory"
          class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
        <property name="hostName" value="${redis.host}" />
        <property name="port" value="${redis.port}" />
        <property name="database" value="${redis.dbIndex}" />
        <property name="poolConfig" ref="poolConfig" />
    </bean>
    
    
    <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
        <property name="connectionFactory" ref="jedisConnectionFactory" />
        
        
        <property name="keySerializer" value="org.springframework.data.redis.serializer.StringRedisSerializer" />
        <property name="valueSerializer" value="org.springframework.data.redis.serializer.JacksonJsonRedisSerializer"/>
        <property name="hashKeySerializer" value="org.springframework.data.redis.serializer.StringRedisSerializer" />
        <property name="hashValueSerializer" value="org.springframework.data.redis.serializer.JacksonJsonRedisSerializer"/>
    </bean>

class="cursor-pointer"> 错误截图

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springboot怎么一直返回字符串呢？

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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使用jwt生产token出现异常

1

会话管理

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

public class JwtUtil {
public static String encode(String key, Map<String, Object> param, String salt) {
//增加盐值
       if (salt != null) {
key += salt;
       }
//采用hs256的方法来进行编码
       JwtBuilder jwtBuilder = Jwts.builder().signWith(SignatureAlgorithm.HS256, key);
       //设置参数
       jwtBuilder = jwtBuilder.setClaims(param);

       String token = jwtBuilder.compact();
       return token;

   }


public static Map<String, Object> decode(String token, String key, String salt) {
Claims claims = null;
       if (salt != null) {
key += salt;
       }
try {
claims = Jwts.parser().setSigningKey(key).parseClaimsJws(token).getBody();
       } catch (JwtException e) {
return null;
       }
return claims;
   }
}

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memcached配置问题

0

1

memcache

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
      xmlns:context="http://www.springframework.org/schema/context"
      xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xsi:schemaLocation="
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
     http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd
      http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">
   <!-- properties config   -->
   <bean class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
       <property name="order" value="1"/>
       <property name="ignoreUnresolvablePlaceholders" value="true"/>
       <property name="locations">
           <list>
               <value>classpath:memcached.properties</value>
           </list>
       </property>
   </bean>
   <!--Memcached配置-->
   <!--
      枚举类型要想注入到类中，一定要先使用org.springframework.beans.factory.config.FieldRetrievingFactoryBean类将枚举类型进行转换
      将DefaultHashAlgorithm.KETAMA_HASH转换为KETAMA_HASH这个bean，
      然后在要注入的bean中使用<property name="hashAlg" ref="KETAMA_HASH" />引用即可。-->
<bean id="memCachedPool" class="com.danga.MemCached.SockIOPool"  factory-method="getInstance" init-method="initialize" destroy-method="shutDown">
   <constructor-arg>
       <value>memCachedPool</value>
   </constructor-arg>
   <property name="servers">
   <!-- ${memcached.server} -->
   <list>
       <value>${memcached.server}:${memcached.port1}</value>
   </list>
</property>
   <property name="initConn">
       <value>${memcached.initConn}</value>
   </property>
   <property name="minConn">
       <value>${memcached.minConn}</value>
   </property>
   <property name="maxConn">
       <value>${memcached.maxConn}</value>
   </property>
   <property name="maintSleep">
       <value>${memcached.mainSleep}</value>
   </property>
   <property name="nagle">
       <value>${memcached.nagle}</value>
   </property>
   <property name="socketTO">
       <value>${memcached.socketTO}</value>
   </property>
</bean>
   <bean id="memCachedClient" >
   <constructor-arg>
       <value>memCachedPool</value>
   </constructor-arg>
</bean>
</beans>

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为什么增加索引和未增加索引查询和插入时间相差不大？

1

DB设计

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

package action;

import mapper.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import pojo.User;

/**
 * 测试循环调用1000次
 */
public class Main {
    public static void main(String[] args) {

        long startTime = System.currentTimeMillis();

       try {
           ApplicationContext context = new ClassPathXmlApplicationContext("spring-mybatis.xml");
           UserService userService = context.getBean(UserService.class);
           for (int i = 0; i < 1000000; i++) {
               User user = new User();
               int x = (int) (Math.random() * 1000)+10000;
               String mix = "MIX3S" + x;
               String pwx = "guess" + x;
               user.setName(mix);
               user.setPassword(pwx);
               userService.insert(user);
           }
       }catch (Exception e){
           System.out.println("连接中断!");
       }
        long endTime = System.currentTimeMillis();
        long totalTime = endTime-startTime;
        System.out.println("测试时间："+totalTime+"毫秒");
    }
}

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图片迁移异常

0

1

图片上传

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

public void transferUpload(String fileName,InputStream inputStream) {

        //请求上传凭证
        Auth auth = Auth.create(accessKey, secretKey);
        String upToken = auth.uploadToken(bucket);
        try {

            Response response = uploadManager.put(inputStream, fileName, upToken,null,null);
            DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
            System.out.println(putRet.key);
            System.out.println(putRet.hash);
        } catch (QiniuException ex) {
            Response r = ex.response;
            System.err.println(r.toString());
            try {
                System.err.println(r.bodyString());
            } catch (QiniuException ex2) {
            }
        }
    }
public void transferUpload(InputStream inputStream,String fileName){
        ObjectMetadata objectMetadata = new ObjectMetadata();
        objectMetadata.setContentLength(1);
        cosClient.putObject(bucketName,fileName,inputStream,objectMetadata);
    }

com.qcloud.cos.exception.CosClientException: More data read than expected: dataLength=8192; expectedLength=1; includeSkipped=false; in.getClass()=class com.qcloud.cos.internal.ReleasableInputStream; markedSupported=false; marked=0; resetSinceLastMarked=false; markCount=0; resetCount=0

at com.qcloud.cos.internal.LengthCheckInputStream.checkLength(LengthCheckInputStream.java:117)
	at com.qcloud.cos.internal.LengthCheckInputStream.read(LengthCheckInputStream.java:76)
	at com.qcloud.cos.internal.SdkFilterInputStream.read(SdkFilterInputStream.java:47)
	at com.qcloud.cos.internal.MD5DigestCalculatingInputStream.read(MD5DigestCalculatingInputStream.java:82)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
	at com.qcloud.cos.internal.SdkBufferedInputStream.read(SdkBufferedInputStream.java:46)
	at com.qcloud.cos.internal.SdkFilterInputStream.read(SdkFilterInputStream.java:47)
	at com.qcloud.cos.internal.SdkFilterInputStream.read(SdkFilterInputStream.java:47)
	at com.qcloud.cos.event.ProgressInputStream.read(ProgressInputStream.java:145)
	at org.apache.http.entity.InputStreamEntity.writeTo(InputStreamEntity.java:140)
	at org.apache.http.impl.execchain.RequestEntityProxy.writeTo(RequestEntityProxy.java:121)
	at org.apache.http.impl.DefaultBHttpClientConnection.sendRequestEntity(DefaultBHttpClientConnection.java:156)
	at org.apache.http.impl.conn.CPoolProxy.sendRequestEntity(CPoolProxy.java:160)
	at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:238)
	at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:123)
	at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272)
	at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
	at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
	at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)
	at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
	at com.qcloud.cos.http.DefaultCosHttpClient.exeute(DefaultCosHttpClient.java:365)
	at com.qcloud.cos.COSClient.invoke(COSClient.java:500)
	at com.qcloud.cos.COSClient.putObject(COSClient.java:816)
	at com.qcloud.cos.COSClient.putObject(COSClient.java:871)
	at jnshu.api.tencentCloud.Storage.transferUpload(Storage.java:72)
	at jnshu.api.qiNiuCloud.Storage.test(Storage.java:184)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Process finished with exit code -1