六.使用java代码显示字符集变量及测试字符集的显示
因为只是作测试用，所以没加修饰。测试时，只需要按照上述三个方法修改字符集即可。
1 import java.sql.*;
2
3 /** *//**
4 *
5 Title:
6
7 *
8 *
9 Description:
10
11 *
12 *
13 Copyright: Copyright (c) 2006
14
15 *
16 *
17 Company:
18
19 *
20 * @author not attributable
21 * @version 1.0
22 */
23 public class TestCharset ...{
24 String username = "root";
25 String passwd = "";
26 Connection conn = null;
27 String charset = null;
28 public TestCharset() ...{
29 }
30
31 public void connect() throws SQLException, ClassNotFoundException ...{
32 Class.forName("com.mysql.jdbc.Driver");
33 String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8";
34 conn = DriverManager.getConnection(url, username, passwd);
35 charset = url.substring(url.lastIndexOf("=")+1);
36 }
37
38 public void getCharset() throws SQLException...{
39 Statement stmt = conn.createStatement();
40 System.out.println("=======show variables like 'chara%'========");
41 ResultSet rset = stmt.executeQuery("show variables like 'chara%'");
42 while (rset.next()) ...{
43 System.out.println(rset.getString(1) + " ------> " + rset.getString(2));
44 }
45 rset.close();
46 System.out.println("=======show variables like 'collation%'========");
47 rset = stmt.executeQuery("show variables like 'collation%'");
48 while (rset.next()) ...{
49 System.out.println(rset.getString(1) + " ------> " + rset.getString(2));
50 }
51 rset.close();
52 stmt.close();
53 }
54
55 public void testGetValuesISO8859_1() throws Exception ...{
56 Statement stmt = conn.createStatement();
57 try ...{
58 stmt.executeUpdate("drop table t12345");
59 } catch (Exception e) ...{
60
61 }
62 stmt.executeUpdate("create table t12345(id int primary key, name varchar(32))");
63 String sz = new String("中文".getBytes("gbk"), "ISO8859_1");
64 stmt.executeUpdate("insert into t12345 values(1, '" + sz + "')");
65 ResultSet rset = stmt.executeQuery("select * from t12345");
66 rset.next();
67 System.out.println("测试中文值: " + new String(rset.getString(2).getBytes("ISO8859_1"), "GBK"));
68 rset.close();
69
70 stmt.close();
71 }
72 public void testGetValuesGBK() throws Exception ...{
73 Statement stmt = conn.createStatement();
74 try ...{
75 stmt.executeUpdate("drop table t12345");
76 } catch (Exception e) ...{
77
78 }
79 stmt.executeUpdate("create table t12345(id int primary key, name varchar(32))");
80 stmt.executeUpdate("insert into t12345 values(1, '中文')");
81 ResultSet rset = stmt.executeQuery("select * from t12345");
82 rset.next();
83 System.out.println("测试中文值: " + rset.getString(2));
84 rset.close();
85
86 stmt.close();
87 }
88 public void testGetValuesUTF8() throws Exception ...{
89 Statement stmt = conn.createStatement();
90 try ...{
91 stmt.executeUpdate("drop table t12345");
92 } catch (Exception e) ...{
93
94 }
95 stmt.executeUpdate("create table t12345(id int primary key, name varchar(32))");
96 //String sz = new String("中文".getBytes("gbk"), "UTF8");
97 stmt.executeUpdate("insert into t12345 values(1, '中文')");
98 ResultSet rset = stmt.executeQuery("select * from t12345");
99 rset.next();
100 System.out.println("测试中文值: " + rset.getString(2));
101 rset.close();
102
103 stmt.close();
104 }
105 public void disconnect() throws SQLException...{
106 if (conn != null) conn.close();
107 }
108 public static void main(String[] args) ...{
109 TestCharset t = new TestCharset();
110 try ...{
111 t.connect();
112 t.getCharset();
113 if (t.charset.equals( "ISO8859_1" ))
114 t.testGetValuesISO8859_1();
115 else if (t.charset.equals("GBK"))
116 t.testGetValuesGBK();
117 else if (t.charset.equals("UTF-8"))
118 t.testGetValuesUTF8();
119 } catch (Exception e) ...{
120 //System.out.println(e.getMessage());
121 e.printStackTrace();
122 } finally ...{
123 try ...{
124 t.disconnect();
125 } catch (Exception e2) ...{
126 }
127 }
128 }
129 }
2
3 /** *//**
4 *
5 Title:
6
7 *
8 *
9 Description:
10
11 *
12 *
13 Copyright: Copyright (c) 2006
14
15 *
16 *
17 Company:
18
19 *
20 * @author not attributable
21 * @version 1.0
22 */
23 public class TestCharset ...{
24 String username = "root";
25 String passwd = "";
26 Connection conn = null;
27 String charset = null;
28 public TestCharset() ...{
29 }
30
31 public void connect() throws SQLException, ClassNotFoundException ...{
32 Class.forName("com.mysql.jdbc.Driver");
33 String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8";
34 conn = DriverManager.getConnection(url, username, passwd);
35 charset = url.substring(url.lastIndexOf("=")+1);
36 }
37
38 public void getCharset() throws SQLException...{
39 Statement stmt = conn.createStatement();
40 System.out.println("=======show variables like 'chara%'========");
41 ResultSet rset = stmt.executeQuery("show variables like 'chara%'");
42 while (rset.next()) ...{
43 System.out.println(rset.getString(1) + " ------> " + rset.getString(2));
44 }
45 rset.close();
46 System.out.println("=======show variables like 'collation%'========");
47 rset = stmt.executeQuery("show variables like 'collation%'");
48 while (rset.next()) ...{
49 System.out.println(rset.getString(1) + " ------> " + rset.getString(2));
50 }
51 rset.close();
52 stmt.close();
53 }
54
55 public void testGetValuesISO8859_1() throws Exception ...{
56 Statement stmt = conn.createStatement();
57 try ...{
58 stmt.executeUpdate("drop table t12345");
59 } catch (Exception e) ...{
60
61 }
62 stmt.executeUpdate("create table t12345(id int primary key, name varchar(32))");
63 String sz = new String("中文".getBytes("gbk"), "ISO8859_1");
64 stmt.executeUpdate("insert into t12345 values(1, '" + sz + "')");
65 ResultSet rset = stmt.executeQuery("select * from t12345");
66 rset.next();
67 System.out.println("测试中文值: " + new String(rset.getString(2).getBytes("ISO8859_1"), "GBK"));
68 rset.close();
69
70 stmt.close();
71 }
72 public void testGetValuesGBK() throws Exception ...{
73 Statement stmt = conn.createStatement();
74 try ...{
75 stmt.executeUpdate("drop table t12345");
76 } catch (Exception e) ...{
77
78 }
79 stmt.executeUpdate("create table t12345(id int primary key, name varchar(32))");
80 stmt.executeUpdate("insert into t12345 values(1, '中文')");
81 ResultSet rset = stmt.executeQuery("select * from t12345");
82 rset.next();
83 System.out.println("测试中文值: " + rset.getString(2));
84 rset.close();
85
86 stmt.close();
87 }
88 public void testGetValuesUTF8() throws Exception ...{
89 Statement stmt = conn.createStatement();
90 try ...{
91 stmt.executeUpdate("drop table t12345");
92 } catch (Exception e) ...{
93
94 }
95 stmt.executeUpdate("create table t12345(id int primary key, name varchar(32))");
96 //String sz = new String("中文".getBytes("gbk"), "UTF8");
97 stmt.executeUpdate("insert into t12345 values(1, '中文')");
98 ResultSet rset = stmt.executeQuery("select * from t12345");
99 rset.next();
100 System.out.println("测试中文值: " + rset.getString(2));
101 rset.close();
102
103 stmt.close();
104 }
105 public void disconnect() throws SQLException...{
106 if (conn != null) conn.close();
107 }
108 public static void main(String[] args) ...{
109 TestCharset t = new TestCharset();
110 try ...{
111 t.connect();
112 t.getCharset();
113 if (t.charset.equals( "ISO8859_1" ))
114 t.testGetValuesISO8859_1();
115 else if (t.charset.equals("GBK"))
116 t.testGetValuesGBK();
117 else if (t.charset.equals("UTF-8"))
118 t.testGetValuesUTF8();
119 } catch (Exception e) ...{
120 //System.out.println(e.getMessage());
121 e.printStackTrace();
122 } finally ...{
123 try ...{
124 t.disconnect();
125 } catch (Exception e2) ...{
126 }
127 }
128 }
129 }
