Spring-Boot, Can't save unicode string in MySq

问题:

I have my application.properties set up like this :

spring.datasource.username = root
spring.datasource.password = root
spring.datasource.url = jdbc:mysql://localhost:3306/dbname?useUnicode=yes&characterEncoding=UTF-8
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto = update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

And In my pom.xmlI have property set up like this :

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <start-class>toyanathapi.Application</start-class>
        <java.version>1.8</java.version>
</properties>

My entity : @Entity public class DailyRashifalEntity {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String date;
private int rollno;
private String name;
//Constructors and getters/setters 
}

Problem 1: If I use the above setup I get the exception

java.sql.SQLException: Incorrect string value: '\xE0\xA4\xA7\xE0\xA4\xBE...

Problem 2 : If I change the datasource url into this :

spring.datasource.url = jdbc:mysql://localhost:3306/dbname

The unicodes in my database get saved like this

 29 | 2074-03-04 |        3 | ?????????????? ?????,?????? ??????, ??????????? ????? ? ???? ???? ???? ??????  

How can I save them in Mysql like they are in unicode instead of getting all the unicode data converted into ???????? .

回答1:

In your /etc/mysql/my.cnf file change the following.

[mysql]
default-character-set=utf8
[mysqld]
character-set-server=utf8

回答2:

Keep your hibernate configuration Like this

jdbc:mysql://localhost:3306/dbname?useUnicode=yes&characterEncoding=UTF-8

And Change your DB Collation Like this

ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

More information : Link

回答3:

See "question marks" in http://stackoverflow.com/questions/38363566/trouble-with-utf8-characters-what-i-see-is-not-what-i-stored .

Also,

⚈  spring.jpa.properties.hibernate.connection.characterEncoding=utf-8 
⚈  spring.jpa.properties.hibernate.connection.CharSet=utf-8 
⚈  spring.jpa.properties.hibernate.connection.useUnicode=true 

回答4:

Non of the answer worked for me … except the url encoding part.

The solution in my case is twofold:

1- Add encoding in the URL of Database config bean:

<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/customersdb?useSSL=false&amp;useUnicode=yes&amp;characterEncoding=UTF-8&amp;characterSetResults=UTF-8" />

2- Add this configuration to your dispatcher config file:

<filter>
    <filter-name>encoding-filter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
        <param-name>forceEncoding</param-name>
        <param-value>true</param-value>
    </init-param>
</filter>

<filter-mapping>
    <filter-name>encoding-filter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
</filter-mapping>

Otherwise, other configurations don't take effect.