MyBatis模糊查询不报错但查不出数据的一种解决方案

今天在用MyBatis写一个模糊查询的时候，程序没有报错，但查不出来数据，随即做了一个测试，部分代码如下：

@Test
public void findByNameTest() throws IOException {
    String resource = "SqlMapConfig.xml";
    InputStream inputStream = Resources.getResourceAsStream(resource);
    SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder()
            .build(inputStream);
    SqlSession sqlSession = sqlSessionFactory.openSession();
    List<User> list = sqlSession.selectList("test.findByName", "远");
    System.out.println(list);
    sqlSession.close();

}

User.xml映射文件

<select id="findByName" parameterType="java.lang.String" resultType="pojo.User">
    SELECT * FROM USER WHERE username LIKE '%${value}%'
</select>

结果日志显示

Opening JDBC Connection
Created connection 2040926578.
Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@79a61172]
==>  Preparing: SELECT * FROM USER WHERE username LIKE '%远%'
==> Parameters:
<==      Total: 0
[]
Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@79a61172]
Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@79a61172]
Returned connection 2040926578 to pool.

查询出的结果数量为0

解决方法：

 在SqlMapConfig.xml配置文件中把

<property name="url" value="jdbc:mysql://localhost:3306/mybatistest" />

改为:

<property name="url" value="jdbc:mysql://localhost:3306/mybatistest?characterEncoding=utf8" />

指定一个字符的编码格式，问题解决。