qq_34369022的博客

1.上传对表单限制  * method="post" * enctype="multipart/form-data" * 表单中需要添加文件表单项: 2.上传对Servlet限制 * request.getParameter("xxx");这个方法在 表单为enctype="multipart/form-data"时，作废，返回null * ServletInputStream r

使用 commons-dbutils jar包 用法 (增/删/改) QueryRunner qr = new QueryRunner(JdbcUtils.getDataSource()); String sql = "update tb_stu set age=? where sid=?"; Object[] params = {25,100}; qr.update(sql, param

import sun.misc.BASE64Encoder; import sun.misc.BASE64Decoder; //编码 String s = "Username"; BASE64Encoder encoder = new BASE64Encoder(); s = encoder.encode(s.getBytes("utf-8")); syso(s); //解码 BASE64Dec

pom.xml依赖<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> <