質問編集履歴
2
訂正
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@@ -3,8 +3,9 @@
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'package sample1;
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package sample1;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.Connection;
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@@ -114,6 +115,11 @@
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throws ServletException, IOException {
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doGet(request, response);
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}
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コード
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```
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```
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--------------------------------------------------------------------------
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doGet メソッドのrequestとresponse の引数は何を受けっと手いるのでしょうか？
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1
マークダウン訂正
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@@ -1,19 +1,119 @@
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1
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```java
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2
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'package sample1;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.Connection;
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11
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import java.sql.DriverManager;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.Statement;
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15
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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21
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/**
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*
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* @author mori
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*
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3
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-
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26
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*/
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27
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@WebServlet("/Hello")
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public class Hello extends HttpServlet {
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29
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private static final long serialVersionUID = 1L;
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4
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-
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32
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/**
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5
33
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* doGetメソッド
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6
34
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* SELECT文を発行・画面に表示する
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* @param request
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* @param response
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9
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* @throw ServletException
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* @throw ServletException 処理中に問題が起こったときに、Servlet がスローする可能性のある一般的な例外を定義しています。
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10
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* @throw IOException
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* @throw IOException 入出力処理の失敗、または割り込みの発生によって生成される例外
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39
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*
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12
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*/
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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response.setContentType("text/html; charset=utf-8");
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44
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PrintWriter out = response.getWriter();
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16
45
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17
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-
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46
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out.println("<html>");
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18
47
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48
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out.println("<body>");
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49
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+
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50
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Connection conn = null;
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51
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String url = "jdbc:mysql://localhost/training";
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52
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String user = "root";
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53
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String password = "ryota";
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54
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+
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55
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try {
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56
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Class.forName("com.mysql.jdbc.Driver");
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57
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conn = DriverManager.getConnection(url, user, password);
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58
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59
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Statement stmt = conn.createStatement();
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60
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String sql = "SELECT * FROM user";
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61
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ResultSet rs = stmt.executeQuery(sql);
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62
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+
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63
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out.println("<table = border=1>");
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64
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out.println("<tr>");
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65
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out.println("<th>");
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66
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out.println("</th>");
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67
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out.println("<th>");
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68
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out.println("name");
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69
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out.println("</th>");
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70
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out.println("<th>");
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71
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out.println("age");
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72
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+
out.println("</th>");
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73
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+
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74
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+
while (rs.next()) {
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75
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+
int id = rs.getInt("id");
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76
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+
String name = rs.getString("name");
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77
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int age = rs.getInt("age");
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78
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+
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79
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+
out.println("<tr>" + "<td>" + id + "</td>" + "<td>" + name + "</td>" + "<td>" + age + "</td>" + "<tr>");
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80
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+
out.println("<br>");
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81
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+
|
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82
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+
}
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83
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+
out.println("</table>");
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84
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+
rs.close();
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85
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+
stmt.close();
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86
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+
} catch (ClassNotFoundException e) {
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87
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+
out.println("lassNotFoundException:" + e.getMessage());
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88
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+
} catch (SQLException e) {
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89
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+
out.println("SQLException:" + e.getMessage());
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|
90
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+
} catch (Exception e) {
|
|
91
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+
out.println("Exception:" + e.getMessage());
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|
92
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+
} finally {
|
|
93
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+
|
|
94
|
+
try {
|
|
95
|
+
if (conn != null) {
|
|
96
|
+
conn.close();
|
|
97
|
+
}
|
|
98
|
+
} catch (SQLException e) {
|
|
99
|
+
out.println("SQLException:" + e.getMessage());
|
|
100
|
+
}
|
|
101
|
+
|
|
102
|
+
}
|
|
103
|
+
|
|
104
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+
out.println("</body>");
|
|
105
|
+
out.println("</html>");
|
|
106
|
+
}
|
|
107
|
+
|
|
108
|
+
/**
|
|
109
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+
* doPostメソッド
|
|
110
|
+
*
|
|
111
|
+
*/
|
|
112
|
+
|
|
113
|
+
protected void doPost(HttpServletRequest request, HttpServletResponse response)
|
|
114
|
+
throws ServletException, IOException {
|
|
19
|
-
|
|
115
|
+
doGet(request, response);
|
|
116
|
+
}
|
|
117
|
+
}'
|
|
118
|
+
コード
|
|
119
|
+
```
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