版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/hui85206/article/details/83471910
本文主要目的是记录自己所犯错误, 供大家参考:
错误1:
| org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.data.redis.core.RedisTemplate<java.lang.String, java.lang.Object>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1506) |
虽然已经在RedisConfig 前面加了@Configuration注解, 但是仍然报找不到RedisTemplate类型的bean, 网上找的了很多办法都没能解决这个问题. 最后灵机一动, 感觉是因为我的RedisConfig放在 com.test.bootseckill.config包中,而我的spring启动类放在 com.test.bootseckill包下面, 所以springboot不会将RedisConfig类中的bean编译到程序中.
由此可见, 所有@Configuration类必须放在springboot的启动类同一级包或者其子包(如com.test.bootseckill或者com.test.bootseckill.config)
@Configuration
public class RedisConfig extends CachingConfigurerSuppor
2. Class Not find for javax.servlet.XXX
由于之前忘了记录错误了, 大概记得是这样子的.
错误原因: 由于我使用SpringBoot整合jsp的web工程, 在一系列操作之后报这个奇怪的错误. 百度说是缺少javax.servlet的包依赖, 但这个依赖肯定没有问题(最新的新手才会犯这个错误).
解决方法:
1) 使用maven的packet命令重新打包.
2) 重新Edit Run/Debug configuration
2.1) 
2.2) 先删除war包
2.3) 重新加入war包
===============================================================
以下内容皆文章复制于:
https://www.cnblogs.com/cjsblog/p/9150482.html
| 当我们使用@Cacheable注解的时候会将返回的对象缓存起来，我们会发现默认缓存的值是二进制的，不方便查看，为此我们自定义序列化配置，改成JSON格式的 配置如下： pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.cjs.example</groupId>
<artifactId>cjs-springsecurity-example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>cjs-springsecurity-example</name>
<description></description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.yml
spring:
cache:
type: redis
redis:
cache-null-values: false
time-to-live: 3600000ms
redis:
host: 10.123.52.189
port: 6379
database: 5
password: 自己的密码
logging:
level:
root: info
RedisConfig.java
package com.cjs.example.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
@Autowired
private RedisConnectionFactory redisConnectionFactory;
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
serializer.setObjectMapper(objectMapper);
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(redisConnectionFactory);
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setValueSerializer(serializer);
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setHashValueSerializer(serializer);
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
@Bean
public RedisCacheManager redisCacheManager(RedisTemplate redisTemplate) {
RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisTemplate.getConnectionFactory());
RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(redisTemplate.getValueSerializer()));
return new RedisCacheManager(redisCacheWriter, redisCacheConfiguration);
}
/**
* 二者选其一即可
*/
// @Bean
// public RedisCacheConfiguration redisCacheConfiguration() {
// Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
// ObjectMapper objectMapper = new ObjectMapper();
// objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
// objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
// serializer.setObjectMapper(objectMapper);
// return RedisCacheConfiguration.defaultCacheConfig().serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(serializer));
// }
}
UserServiceImpl.java
package com.cjs.example.service.impl;
import com.cjs.example.dao.UserDao;
import com.cjs.example.entity.SysUser;
import com.cjs.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Cacheable(cacheNames = "authority", key = "#username")
@Override
public SysUser getUserByName(String username) {
return userDao.selectByName(username);
}
}
反复看文档，一遍又一遍 最最重要的是
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