zai_deng_dai的博客

java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '? ) order by id desc' at line 1下面是代码信息经过多方询问，各种百度，然后，最终发现，是自己非得多写个玩意，mmp。注意：已经用

java.io.FileNotFoundException: D:\Work\IdeaWork\out\artifacts\java29_26_war_exploded\upload\219de5edfbee72e29f1b60f54752b27.png (系统找不到指定的文件) at java.io.FileOutputStream.open0(Native Method) at java.io.FileOutputStream.open(FileOutputStream.java:270) at.

打开错误提示：This page contains the following errors:error on line 1 at colum 50: Encoding errorBelow is a rendering of the page up to the first error.以上问题是由xml文件的编码格式问题导致，解决方法是使用记事本打开xml文件，选择文件->另存为，“编码”格式选则Unicode或UTF-8，点击保存。重新用浏览器打开以上xml文件，问题解决。

java.io.FileNotFoundException: database.properties (系统找不到指定的文件。)java.io.FileNotFoundException: database.properties (系统找不到指定的文件。) at java.io.FileInputStream.open0(Native Method) at java.io.FileInputStream.open(FileInputStream.java:195) at java.io.File

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server.com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. at sun.reflect.

单个字符串需要进行首字母大写改写，网上大家的思路基本一致，就是将首字母截取，转化成大写然后再串上后面的，类似如下代码 //首字母大写 public static String firstLetterName(String name) { name = name.substring(0, 1).toUpperCase() + name.substring(1); return name; }将字符串name 转化为首字母大写。但是这种效率并不高，我...