字符編碼問題mysql
阿新 • • 發佈:2019-02-27
framework 註冊 行修改 ref strac rac 就是 del bat
### The error may exist in com/hn/haoniu/businesscore/dao/UserMapper.java (best guess)
### The error may involve com.hn.haoniu.businesscore.dao.UserMapper.selectOne-Inline
### The error occurred while setting parameters
### SQL: SELECT id,invite_code,recommend_user_id,nick_name,phone,password,real_name,sex,area,user_type,robot_type,head_img,salt,lei_type,token_id,create_time,update_time,del_flag FROM user WHERE nick_name = ?
### Cause: java.sql.SQLException: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation ‘=‘
; uncategorized SQLException for SQL []; SQL state [HY000]; error code [1267]; Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation ‘=‘; nested exception is java.sql.SQLException: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation ‘=‘
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:84) ~[spring-jdbc-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73) ~[mybatis-spring-1.3.1.jar:1.3.1]
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInte
解決方法
java.sql.SQLException: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation ‘=‘,意思是說字符編碼不一樣,不能進行比較,也就是說數據庫內部的編碼都不一樣,有的數據是latin1_swedish_ci,有的數據是utf8_general_ci,,因此解決此問題的核心就是將數據庫所有的編碼進行統一。
1、查看數據庫編碼,使用sql語句:show variables like ‘character_set_%‘;
正確的如下圖:
如果編碼不對,可使用以下sql語句進行修改:
set character_set_client=utf8;
set character_set_connection=utf8;
set character_set_database=utf8;
set character_set_results=utf8;
set character_set_server=utf8;
set character_set_system=utf8;
2、查看排序規則,使用sql語句:show variables like ‘collation_%‘;
正確的如下圖:
如果不對,可使用以下sql語句進行修改:
set collation_connection=utf8;
set collation_database=utf8;
set collation_server=utf8;
SpringBoot 的自動配置如此強大,比如我們經常使用的@Enable* 註解來開啟對某方面的支持。那麽@Enable* 註解的原理是什麽呢?
一、@Enable* 註解與 @Import 註解之間的關系
@Enable* 舉例:
@EnableScheduling 開啟計劃任務的支持
@EnableAsync 開啟異步方法的支持
@EnableAspectJAutoProxy 開啟對 AspectJ 代理的支持
@EnableTransactionManagement 開啟對事務的支持
@EnableCaching 開啟對註解式緩存的支持
等等
我們觀察這些@Enable* 的源碼可以看出,所有@Enable* 註解都是有@Import的組合註解,@Enable* 自動開啟的實現其實就是導入了一些自動配置的Bean
看下 Spring Boot Reference Guide原文
You need not put all your @Configuration into a single class. The @Import annotation
can be used to import additional configuration classes.
您不需要把所有的 @Configuration 放到一個類中。@Import 註解可以導入額外的配置類。
@Import 註解的最主要功能就是導入額外的配置信息
二、 @Import 註解的用法
官方介紹:
* <p>Provides functionality equivalent to the {@code <import/>} element in Spring XML.
* Allows for importing {@code @Configuration} classes, {@link ImportSelector} and
* {@link ImportBeanDefinitionRegistrar} implementations, as well as regular component
* classes (as of 4.2; analogous to {@link AnnotationConfigApplicationContext#register}).
有以下三種使用方式
1、直接導入配置類(@Configuration 類)
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Import(SchedulingConfiguration.class)
@Documented
public @interface EnableScheduling {
}
可以看到EnableScheduling註解直接導入配置類SchedulingConfiguration,這個類註解了@Configuration,且註冊了一個scheduledAnnotationProcessor的Bean,SchedulingConfiguration的源碼如下:
@Configuration
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
public class SchedulingConfiguration {
@Bean(name = TaskManagementConfigUtils.SCHEDULED_ANNOTATION_PROCESSOR_BEAN_NAME)
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
public ScheduledAnnotationBeanPostProcessor scheduledAnnotationProcessor() {
return new ScheduledAnnotationBeanPostProcessor();
}
}
2、依據條件選擇配置類(實現 ImportSelector 接口)
如果並不確定引入哪個配置類,需要根據@Import註解所標識的類或者另一個註解(通常是註解)裏的定義信息選擇配置類的話,用這種方式。
ImportSelector接口只有一個方法
String[] selectImports(AnnotationMetadata importingClassMetadata);
AnnotationMetadata:用來獲得當前配置類上的註解
例:
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Import(AsyncConfigurationSelector.class)
public @interface EnableAsync {
Class<? extends Annotation> annotation() default Annotation.class;
boolean proxyTargetClass(www.jiahuayulpt.com) default false;
AdviceMode mode() default AdviceMode.PROXY;
int order() default Ordered.LOWEST_PRECEDENCE;
}
AsyncConfigurationSelector繼承AdviceModeImportSelector,AdviceModeImportSelector類實現ImportSelector接口 根據AdviceMode的不同來選擇生明不同的Bean
public class AsyncConfigurationSelector extends AdviceModeImportSelector<EnableAsync> {
private static final String ASYNC_EXECUTION_ASPECT_CONFIGURATION_CLASS_NAME =
"org.springframework.scheduling.aspectj.AspectJAsyncConfiguration";
@Override
@Nullable
public String[] selectImports(AdviceMode adviceMode) {
switch (adviceMode) {
case PROXY:
return new String[] {ProxyAsyncConfiguration.class.getName()};
case ASPECTJ:
return new String[] {ASYNC_EXECUTION_ASPECT_CONFIGURATION_CLASS_NAME};
default:
return null;
}
}
}
3、動態註冊Bean(實現 ImportBeanDefinitionRegistrar 接口)
一般只要用戶確切知道哪些Bean需要放入容器的話,自己可以通過spring 提供的註解來標識就可以了,比如@Component,@Service,@Repository,@Bean等。 如果是不確定的類,或者不是spring專用的,所以並不想用spring的註解進行侵入式標識,那麽就可以通過@Import註解,實現ImportBeanDefinitionRegistrar接口來動態註冊Bean。 比如:
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Import(AspectJAutoProxyRegistrar.class)
public @interface EnableAspectJAutoProxy {
boolean proxyTargetClass(www.myzx157.com) default false;
boolean exposeProxy() default false;
}
AspectJAutoProxyRegistrar實現了ImportBeanDefinitionRegistrar接口,ImportBeanDefinitionRegistrar的作用是在運行時自動添加Bean到已有的配置類,通過重寫方法:
public void registerBeanDefinitions(
AnnotationMetadata importingClassMetadata,www.yongshiyule178.com BeanDefinitionRegistry registry);
AnnotationMetadata 參數用來獲得當前配置類上的註解
BeanDefinitionRegistry 參數用來註冊Bean
源碼:
@Override
public void registerBeanDefinitions(
AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
AopConfigUtils.registerAspectJAnnotationAutoProxyCreatorIfNecessary(registry);
AnnotationAttributes www.yaxingyule.cn enableAspectJAutoProxy www.leyouzaixian2.com =
AnnotationConfigUtils.www.yingxionghui1.cn attributesFor(importingClassMetadata, EnableAspectJAutoProxy.class);
if (enableAspectJAutoProxy != www.taoyang2vip.com null) {
if (enableAspectJAutoProxy.www.yongshi123.cn getBoolean("proxyTargetClass")) {
AopConfigUtils.forceAutoProxyCreatorToUseClassProxying(registry);
}
if (enableAspectJAutoProxy.getBoolean( www.feishenbo.cn/ "exposeProxy")) {
AopConfigUtils.forceAutoProxyCreatorToExposeProxy(registry);
2019-02-27 07:32:17.108 ERROR 21745 --- [nio-8086-exec-2] c.h.h.rest.configurer.WebMvcConfigurer : 接口[/flyfish/h5/user/register]出
現異常 :[{}]
org.springframework.jdbc.UncategorizedSQLException:
### Error querying database. Cause: java.sql.SQLException: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation ‘=‘
### The error may exist in com/hn/haoniu/businesscore/dao/UserMapper.java (best guess)
### The error may involve com.hn.haoniu.businesscore.dao.UserMapper.selectOne-Inline
### The error occurred while setting parameters
### SQL: SELECT id,invite_code,recommend_user_id,nick_name,phone,password,real_name,sex,area,user_type,robot_type,head_img,salt,lei_type,token_id,create_time,update_time,del_flag FROM user WHERE nick_name = ?
### Cause: java.sql.SQLException: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation ‘=‘
; uncategorized SQLException for SQL []; SQL state [HY000]; error code [1267]; Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation ‘=‘; nested exception is java.sql.SQLException: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation ‘=‘
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:84) ~[spring-jdbc-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73) ~[mybatis-spring-1.3.1.jar:1.3.1]
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInte
解決方法
java.sql.SQLException: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation ‘=‘,意思是說字符編碼不一樣,不能進行比較,也就是說數據庫內部的編碼都不一樣,有的數據是latin1_swedish_ci,有的數據是utf8_general_ci,,因此解決此問題的核心就是將數據庫所有的編碼進行統一。
1、查看數據庫編碼,使用sql語句:show variables like ‘character_set_%‘;
正確的如下圖:
如果編碼不對,可使用以下sql語句進行修改:
set character_set_client=utf8;
set character_set_connection=utf8;
set character_set_database=utf8;
set character_set_results=utf8;
set character_set_server=utf8;
set character_set_system=utf8;
2、查看排序規則,使用sql語句:show variables like ‘collation_%‘;
正確的如下圖:
如果不對,可使用以下sql語句進行修改:
set collation_connection=utf8;
set collation_database=utf8;
set collation_server=utf8;
SpringBoot 的自動配置如此強大,比如我們經常使用的@Enable* 註解來開啟對某方面的支持。那麽@Enable* 註解的原理是什麽呢?
一、@Enable* 註解與 @Import 註解之間的關系
@Enable* 舉例:
@EnableScheduling 開啟計劃任務的支持
@EnableAsync 開啟異步方法的支持
@EnableAspectJAutoProxy 開啟對 AspectJ 代理的支持
@EnableTransactionManagement 開啟對事務的支持
@EnableCaching 開啟對註解式緩存的支持
等等
我們觀察這些@Enable* 的源碼可以看出,所有@Enable* 註解都是有@Import的組合註解,@Enable* 自動開啟的實現其實就是導入了一些自動配置的Bean
看下 Spring Boot Reference Guide原文
You need not put all your @Configuration into a single class. The @Import annotation
can be used to import additional configuration classes.
您不需要把所有的 @Configuration 放到一個類中。@Import 註解可以導入額外的配置類。
@Import 註解的最主要功能就是導入額外的配置信息
二、 @Import 註解的用法
官方介紹:
* <p>Provides functionality equivalent to the {@code <import/>} element in Spring XML.
* Allows for importing {@code @Configuration} classes, {@link ImportSelector} and
* {@link ImportBeanDefinitionRegistrar} implementations, as well as regular component
* classes (as of 4.2; analogous to {@link AnnotationConfigApplicationContext#register}).
有以下三種使用方式
1、直接導入配置類(@Configuration 類)
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Import(SchedulingConfiguration.class)
@Documented
public @interface EnableScheduling {
}
可以看到EnableScheduling註解直接導入配置類SchedulingConfiguration,這個類註解了@Configuration,且註冊了一個scheduledAnnotationProcessor的Bean,SchedulingConfiguration的源碼如下:
@Configuration
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
public class SchedulingConfiguration {
@Bean(name = TaskManagementConfigUtils.SCHEDULED_ANNOTATION_PROCESSOR_BEAN_NAME)
@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
public ScheduledAnnotationBeanPostProcessor scheduledAnnotationProcessor() {
return new ScheduledAnnotationBeanPostProcessor();
}
}
2、依據條件選擇配置類(實現 ImportSelector 接口)
如果並不確定引入哪個配置類,需要根據@Import註解所標識的類或者另一個註解(通常是註解)裏的定義信息選擇配置類的話,用這種方式。
ImportSelector接口只有一個方法
String[] selectImports(AnnotationMetadata importingClassMetadata);
AnnotationMetadata:用來獲得當前配置類上的註解
例:
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Import(AsyncConfigurationSelector.class)
public @interface EnableAsync {
Class<? extends Annotation> annotation() default Annotation.class;
boolean proxyTargetClass(www.jiahuayulpt.com) default false;
AdviceMode mode() default AdviceMode.PROXY;
int order() default Ordered.LOWEST_PRECEDENCE;
}
AsyncConfigurationSelector繼承AdviceModeImportSelector,AdviceModeImportSelector類實現ImportSelector接口 根據AdviceMode的不同來選擇生明不同的Bean
public class AsyncConfigurationSelector extends AdviceModeImportSelector<EnableAsync> {
private static final String ASYNC_EXECUTION_ASPECT_CONFIGURATION_CLASS_NAME =
"org.springframework.scheduling.aspectj.AspectJAsyncConfiguration";
@Override
@Nullable
public String[] selectImports(AdviceMode adviceMode) {
switch (adviceMode) {
case PROXY:
return new String[] {ProxyAsyncConfiguration.class.getName()};
case ASPECTJ:
return new String[] {ASYNC_EXECUTION_ASPECT_CONFIGURATION_CLASS_NAME};
default:
return null;
}
}
}
3、動態註冊Bean(實現 ImportBeanDefinitionRegistrar 接口)
一般只要用戶確切知道哪些Bean需要放入容器的話,自己可以通過spring 提供的註解來標識就可以了,比如@Component,@Service,@Repository,@Bean等。 如果是不確定的類,或者不是spring專用的,所以並不想用spring的註解進行侵入式標識,那麽就可以通過@Import註解,實現ImportBeanDefinitionRegistrar接口來動態註冊Bean。 比如:
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Import(AspectJAutoProxyRegistrar.class)
public @interface EnableAspectJAutoProxy {
boolean proxyTargetClass(www.myzx157.com) default false;
boolean exposeProxy() default false;
}
AspectJAutoProxyRegistrar實現了ImportBeanDefinitionRegistrar接口,ImportBeanDefinitionRegistrar的作用是在運行時自動添加Bean到已有的配置類,通過重寫方法:
public void registerBeanDefinitions(
AnnotationMetadata importingClassMetadata,www.yongshiyule178.com BeanDefinitionRegistry registry);
AnnotationMetadata 參數用來獲得當前配置類上的註解
BeanDefinitionRegistry 參數用來註冊Bean
源碼:
@Override
public void registerBeanDefinitions(
AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
AopConfigUtils.registerAspectJAnnotationAutoProxyCreatorIfNecessary(registry);
AnnotationAttributes www.yaxingyule.cn enableAspectJAutoProxy www.leyouzaixian2.com =
AnnotationConfigUtils.www.yingxionghui1.cn attributesFor(importingClassMetadata, EnableAspectJAutoProxy.class);
if (enableAspectJAutoProxy != www.taoyang2vip.com null) {
if (enableAspectJAutoProxy.www.yongshi123.cn getBoolean("proxyTargetClass")) {
AopConfigUtils.forceAutoProxyCreatorToUseClassProxying(registry);
}
if (enableAspectJAutoProxy.getBoolean( www.feishenbo.cn/ "exposeProxy")) {
AopConfigUtils.forceAutoProxyCreatorToExposeProxy(registry);
字符編碼問題mysql