关于mysql数据库“Incorrectstringvalue:'/xFF/xFE/_MySQL
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或许很多人能和我一样在使用mysql数据库时会遇到这样的问题,无法显示中文字符,而且无法无法被加载进数据库。
这就是程序员都会遇到的字符编码问题,接下来以JAVA链接数据库为列说明。
package fang.Demo;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.ResultSet;import javax.swing.JPopupMenu.Separator;public class ConnectDemo04 { // 定义MySQL的数据库驱动程序 public static final String DBDRIVER = "org.gjt.mm.mysql.Driver"; // 定义MySQL数据库的连接地址 public static final String DBURL = "jdbc:mysql://localhost:3306/demo2"; // MySQL数据库的连接用户名 public static final String DBUSER = "root"; // MySQL数据库的连接密码 public static final String DBPASS = ""; public static void main(String args[]) throws Exception { // 所有的异常抛出 Connection conn = null; // 数据库连接 PreparedStatement stmt = null; // 数据库操作 ResultSet res = null; Class.forName(DBDRIVER); // 加载驱动程序 String name = "方萨安" ; // 表示姓名 String sql = "INSERT INTO userclob(name,note) VALUES (?,?) " ; Class.forName(DBDRIVER) ; // 加载驱动程序 conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ; stmt = conn.prepareStatement(sql) ; // 创建PreapredStatement对象 File f = new File("d:" + File.separator + "test.txt") ; InputStream input = null ; input = new FileInputStream(f) ; // 通过输入流读取文件 stmt.setString(1,name) ; stmt.setAsciiStream(2,input,(int)f.length()) ; stmt.executeUpdate() ; conn.close() ; // 数据库关闭 }};
这个java程序读取的是D盘目录下的test.txt文件
遇到这种问题可以看到错误提示是不正确的数据类型(大概是这个样子),然后我试了试数字和英文字母均可成运行,并写入数据库库
数据库数据图
由此可见,此问题必定是数据字符编码不正确引起的,那么如何解决呢?
从我建的数据表易知,他们都是utf8类型的国际化通用数据类型(推荐)
可是记事本的编码呢?它是什么类型?
但是……
但是我们却是可以设置的打开txt文件点击另存为—>设置编码。
设置为数据编码utf8
再次运行java程序
你会发现错误消失了,打开数据库文件你会发现数据已经成功写入数据表。
当然,网站报错的原理和这是一样的都是,数据表字符编码设置的问题,大家认真设置下就OK了
设置详见另一篇博文。
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