1. 程式人生 > >MyBatis模糊查詢不報錯但查不出資料的一種解決方案

MyBatis模糊查詢不報錯但查不出資料的一種解決方案

今天在用MyBatis寫一個模糊查詢的時候,程式沒有報錯,但查不出來資料,隨即做了一個測試,部分程式碼如下:

	@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", "遠");
		System.out.println(list);
		sqlSession.close();

	}

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

結果日誌顯示

Opening JDBC Connection
Created connection 2040926578.
Setting autocommit to false on JDBC Connection [[email protected]
] ==> Preparing: SELECT * FROM USER WHERE username LIKE '%遠%' ==> Parameters: <== Total: 0 [] Resetting autocommit to true on JDBC Connection [[email protected]] Closing JDBC Connection [[email protected]] Returned connection 2040926578 to pool.

查詢出的結果數量為0

解決方法:

 在SqlMapConfig.xml配置檔案中把

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

改為:

<property name="url" value="jdbc:mysql://localhost:3306/mybatistest?characterEncoding=utf8" />
指定一個字元的編碼格式,問題解決。