how to use (useUnicode=yes characterEncoding=UTF-8 ) with DBCP

问题

I am trying to insert Arabic letter in to mysql database, but it only store "????". I am using DBCP for connecting with mysql databse, here is the datasource:

          <Resource name="jdbc/view_db" 
      auth="Container"
          type="javax.sql.DataSource"
          username="root" 
          password=""
          autoReconnect="true"
          testOnBorrow="true"
          validationQuery = "SELECT 1"
          driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://localhost/view_db"
          maxActive="50"
          maxIdle="10"/>

how to setup UTF-8 encoding with in DBCP configuration or how to use (useUnicode=yes characterEncoding=UTF-8 ) ?

回答1:

According to the DBCP documentation you need use the parameter connectionProperties with value [propertyName=propertyValue;]*, so in your case you should use something like:

      driverClassName="com.mysql.jdbc.Driver"
      url="jdbc:mysql://localhost/view_db"
      connectionProperties="useUnicode=yes;characterEncoding=utf8;"
      maxActive="50"

(note the closing ;!)

回答2:

I tried the following and it worked for me using tomcat 7.0.40 and MySQL 5.5 on Debian Wheezy box:

url="jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=utf8" 

Note that & must be represented as &

also make sure that your my.cnf for your mysql server has the following lines:

[client]
default-character-set=utf8

[mysql]
default-character-set=utf8

回答3:

Specify it in the url parameter, like this:

url="jdbc:mysql://localhost/view_db?useUnicode=yes&characterEncoding=utf8"

来源：https://stackoverflow.com/questions/13359683/how-to-use-useunicode-yes-characterencoding-utf-8-with-dbcp