Java + mysql Chinese garbled problem, javamysql Chinese garbled Problem

Java + mysql Chinese garbled problem, javamysql Chinese garbled Problem

There are multiple causes of garbled characters, one of which is because MySQL uses the ISO-8859-1 (Latin1) Character Set by default, while JAVA uses Unicode encoding internally, so when inserting data into the MYSQL database in JAVA, or when reading data, you must first convert the encoding method. Of course, if you can directly modify the configuration file, you can also solve the garbled problem. However, in some cases, we cannot directly access the configuration file (such as the space you bought online ), in this case, we can convert the encoding format.

 

Insert data:

For example:

...

String str = "Chinese ";

String SQL = "insert into Tb (xxx) values (?) "

PreparedStatement pstmt = conn. prepareStatement (SQL );

Pstmt. setString (1, str );

Pstmt.exe cuteUpdate ();

After this example is inserted into the mysqldata warehouse, you can view the data through mysql.exe connection. The inserted data becomes several "?" It is garbled.

Solution:

String str = "Chinese ";

Str = new String (str. getBytes (), "ISO8859_1"); // Add this sentence and encode it as a iso-8859-1

String SQL = "insert into Tb (xxx) values (?) "

PreparedStatement pstmt = conn. prepareStatement (SQL );

Pstmt. setString (1, str );

Pstmt.exe cuteUpdate ();

 

Read data:

The method is similar to inserting data, as shown below:

...

String str = rs. getString (1 );

Str = new String (str. getBytes ("ISO8859_1"); // restores from ISO8859-1 encoding to JAVA internal default Character Set

// Or str = new String (str. getBytes ("ISO8859_1"), "GBK ");