Mybatis中mysql blob类型乱码解决

mysql中存了一个页面的html，应为字段比较长，存成blob类型，在取出后发现会有乱码出现，解决方式是自己扩充了一个TypeHandler

public class MyBlobTypeHandler extends BaseTypeHandler {
    ###指定字符集
    private static final String DEFAULT_CHARSET = "utf-8";

    @Override
    public void setNonNullParameter(PreparedStatement ps, int i,
            String parameter, JdbcType jdbcType) throws SQLException {
        ByteArrayInputStream bis;
        try {
            ###把String转化成byte流
            bis = new ByteArrayInputStream(parameter.getBytes(DEFAULT_CHARSET));
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("Blob Encoding Error!");
        }   
        ps.setBinaryStream(i, bis, parameter.length());
    }

    @Override
    public String getNullableResult(ResultSet rs, String columnName)
            throws SQLException {
        Blob blob = rs.getBlob(columnName);
        byte[] returnValue = null;
        if (null != blob) {
            returnValue = blob.getBytes(1, (int) blob.length());
        }
        try {
            ###把byte转化成string
            return new String(returnValue, DEFAULT_CHARSET);
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("Blob Encoding Error!");
        }
    }

    @Override
    public String getNullableResult(CallableStatement cs, int columnIndex)
            throws SQLException {
        Blob blob = cs.getBlob(columnIndex);
        byte[] returnValue = null;
        if (null != blob) {
            returnValue = blob.getBytes(1, (int) blob.length());
        }
        try {
            return new String(returnValue, DEFAULT_CHARSET);
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("Blob Encoding Error!");
        }
    }
}

在配置文件中配置如下

搞定。