mysql jdbc驅動程序不識別latin1字符

Question

這是我當前的字符集。我試圖插入拉丁文字符，我不能得到它的工作。

SHOW VARIABLES LIKE 'char%'; 
+--------------------------+-----------------------------------+ 
| Variable_name   | Value        | 
+--------------------------+-----------------------------------+ 
| character_set_client  | latin1       | 
| character_set_connection | latin1       | 
| character_set_database | utf8        | 
| character_set_filesystem | binary       | 
| character_set_results | latin1       | 
| character_set_server  | latin1       | 
| character_set_system  | utf8        | 
| character_sets_dir  | /space/xyz/mysql/share/charsets/ | 
+--------------------------+-----------------------------------+ 

數據庫配置不是由我創建的，所以我不能更改字符集或整理。

show create table t1; 
+-------+-------------------------------------------------------------------------------------------------------------------------+ 
| Table | Create Table                           | 
+-------+-------------------------------------------------------------------------------------------------------------------------+ 
| t1 | CREATE TABLE `t1` (
    `col1` text CHARACTER SET latin1 
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_general_cs | 
+-------+-------------------------------------------------------------------------------------------------------------------------+ 

以下是插入帶有unicode字符的名稱的簡單代碼。

private void insert() { 
     try { 
      loadJdbcProperties(); 
      String myquery = "INSERT INTO db.t1(col1) VALUES (?)"; 
      String url = "jdbc:mysql://localhost:3307/db?useUnicode=true&characterEncoding=Cp1252"; 
      Properties prop = new Properties(); 
      prop.put("user", "root"); 
      prop.put("password", "root"); 
      if (_jdbcProperties != null && !_jdbcProperties.isEmpty()) { 
       prop.putAll(_jdbcProperties); 
      } 
      Class.forName("com.mysql.jdbc.Driver").newInstance(); 
      Connection c = DriverManager.getConnection(url, prop); 

      PreparedStatement pstmt = null; 
      String sql = null; 

      sql = myquery; 
      pstmt = c.prepareStatement(sql); 
      pstmt.setString(1, "csvźà.py"); 
      pstmt.execute(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

這是檢索代碼。

private void showResults() { 
     try { 
      loadJdbcProperties(); 
      String myquery = "select col1 from db.t1"; 
      String url = "jdbc:mysql://localhost:3307/db?useUnicode=true&characterEncoding=Cp1252"; 

      Properties prop = new Properties(); 
      prop.put("user", "root"); 
      prop.put("password", "root"); 
      if (_jdbcProperties != null && !_jdbcProperties.isEmpty()) { 
       prop.putAll(_jdbcProperties); 
      } 
      Class.forName("com.mysql.jdbc.Driver").newInstance(); 
      Connection c = DriverManager.getConnection(url, prop); 

      PreparedStatement pstmt = null; 
      String sql = null; 
      ResultSet rs = null; 

      sql = myquery; 
      pstmt = c.prepareStatement(sql); 
      rs = pstmt.executeQuery(); 
      while (rs.next()) { 
       System.out.println(rs.getString("col1")); 

      } 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

下面是結果：

csv?à.py 

Answer 1

ź的字符（Unicode代碼點U+017A）不包括在latin1字符集，因此MySQL不能將它存儲在一個latin1柱。 （根據記錄，這不是在Windows-1252字符集，無論是。）

如果你真的需要這個角色存儲在該列你要麼需要

• 改變列的字符集utf8或
• 拿出你自己的方式來手動編碼和解碼字符串，因此它可以被存儲爲latin1的字符（例如，像csv\u017aà.py）

和調整根據您的代碼LY。