Sākums Izpētīt Palīdzība
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weiyong
/
201906G202
4
4
Atdalīts 0
Faili Problēmas 0 Izmaiņu pieprasījumi 0 Vikivietne
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1801010627 6 gadi atpakaļ
vecāks
cfdad4aec4
revīzija
a7a5d2792e
5 mainītis faili ar 354 papildinājumiem un 0 dzēšanām
Dalītais skats Rādīt salīdzināšanas statistiku
  1. 78 0
      Add.java
  2. 39 0
      AddPage.java
  3. 85 0
      MMC_01.java
  4. 82 0
      Update.java
  5. 70 0
      UpdatePage.java

+ 78 - 0
Add.java
Parādīt failu 

@@ -0,0 +1,78 @@
 
+package org.lsy.servlet; 

+  

+import java.io.IOException; 

+import java.io.PrintWriter; 

+import java.sql.Connection; 

+import java.sql.DriverManager; 

+import java.sql.PreparedStatement; 

+import java.sql.ResultSet; 

+import java.sql.Statement; 

+  

+import javax.servlet.ServletException; 

+import javax.servlet.http.HttpServlet; 

+import javax.servlet.http.HttpServletRequest; 

+import javax.servlet.http.HttpServletResponse; 

+  

+

+  

+public class Add extends HttpServlet 

+{ 

+	  public static final String DBURL = "jdbc:mysql://localhost:3306/kui"; 

+	  // 连接数据库的用户名 

+	  public static final String DBUSER = "root"; 

+	  // 连接数据库的密码 

+	  public static final String DBPASS = "001011"; 

+  

+  @Override

+  protected void doPost(HttpServletRequest req, HttpServletResponse resp) 

+      throws ServletException, IOException 

+  { 

+    // TODO Auto-generated method stub 

+    doGet(req, resp); 

+  } 

+  

+  public void doGet(HttpServletRequest request, HttpServletResponse response) 

+      throws ServletException, IOException 

+  { 

+    //设置请求和响应的编码 ，不然页面上容易出现乱码 

+    request.setCharacterEncoding("UTF-8"); 

+    response.setCharacterEncoding("UTF-8");  

+    

+    response.setContentType("text/html;UTF-8"); 

+    //输出流 

+    PrintWriter out = response.getWriter(); 

+    //数据库连接代码 

+    try

+    { 

+      Connection conn = null; // 表示数据库的连接的对象 

+      Statement pstmt = null; // 表示数据库的更新操作 

+      String nameString=request.getParameter("name"); 

+      String grentString=request.getParameter("grent"); 

+      String resultString=request.getParameter("result"); 

+      System.out.print(nameString); 

+      String sql="insert into student(name,calssGrent,result) values('"+nameString+"','"+grentString+"','"+resultString+"')"; 

+    

+    

+      // 1、使用Class类加载驱动程序 

+      Class.forName("com.mysql.jdbc.Driver");  

+      // 2、连接数据库 

+      conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS); 

+      pstmt=conn.createStatement(); 

+      int pd=pstmt.executeUpdate(sql); 

+      if (pd!=0) 

+      { 

+        out.println("添加成功"); 

+        out.println("<br><a href=MMC_01>查看列表</a>"); 

+      } 

+      conn.close(); 

+        

+    } 

+    catch (Exception e) 

+    { 

+      e.printStackTrace(); 

+    } 

+    out.flush(); 

+    out.close(); 

+  } 

+  

+}

+ 39 - 0
AddPage.java
Parādīt failu 

@@ -0,0 +1,39 @@
 
+package org.lsy.servlet; 

+  

+import java.io.IOException; 

+import java.io.PrintWriter; 

+  

+import javax.servlet.ServletException; 

+import javax.servlet.http.HttpServlet; 

+import javax.servlet.http.HttpServletRequest; 

+import javax.servlet.http.HttpServletResponse; 

+  

+public class AddPage extends HttpServlet 

+{ 

+  

+  public void doGet(HttpServletRequest request, HttpServletResponse response) 

+      throws ServletException, IOException 

+  { 

+    //设置请求和响应的编码 ，不然页面上容易出现乱码 

+    request.setCharacterEncoding("UTF-8"); 

+    response.setCharacterEncoding("UTF-8");  

+    response.setContentType("text/html;UTF-8"); 

+    PrintWriter out = response.getWriter(); 

+    out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 

+    out.println("<HTML>"); 

+    out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 

+    out.println(" <BODY>"); 

+    //提交至add 

+    out.print(" <form action='Add' method='get'> "); 

+    out.print("<table align='center'> <tr><td>设备名称：<input type='text' name='name' size=20 ></td></tr>"); 

+    out.print("<tr><td>数量：<input type='text' name='grent' size=20></td></tr>"); 

+    out.print("<tr><td>价格：<input type='text' name='result' size=20></td></tr>");  

+    out.print("<tr><td><input type='submit' value='添加'><input type='reset' value='重置'></td></tr></table></form>"); 

+    out.println("<tr><td><a href=MMC_01>查看列表</a></td></tr>"); 

+    out.println(" </BODY>"); 

+    out.println("</HTML>"); 

+    out.flush(); 

+    out.close(); 

+  } 

+  

+}

+ 85 - 0
MMC_01.java
Parādīt failu 

@@ -0,0 +1,85 @@
 
+package org.lsy.servlet; 

+  

+import java.io.IOException; 

+import java.io.PrintWriter; 

+import java.sql.Connection; 

+import java.sql.DriverManager; 

+import java.sql.ResultSet; 

+import java.sql.Statement; 

+  

+import javax.servlet.ServletException; 

+import javax.servlet.http.HttpServlet; 

+import javax.servlet.http.HttpServletRequest; 

+import javax.servlet.http.HttpServletResponse; 

+  

+public class MMC_01 extends HttpServlet 

+{ 

+  

+

+  public static final String DBURL = "jdbc:mysql://localhost:3306/kui"; 

+  // 连接数据库的用户名 

+  public static final String DBUSER = "root"; 

+  // 连接数据库的密码 

+  public static final String DBPASS = "001011"; 

+  

+  public void doGet(HttpServletRequest request, HttpServletResponse response) 

+	      throws ServletException, IOException 

+	  { 

+	    //设置请求和响应的编码 ，不然页面上容易出现乱码 

+	    request.setCharacterEncoding("UTF-8"); 

+	    response.setCharacterEncoding("UTF-8");  	    

+	    response.setContentType("text/html;UTF-8"); 

+	    //输出流 

+	    PrintWriter out = response.getWriter(); 

+	    //数据库连接代码 

+	    try

+	    { 

+	      Connection conn = null; // 表示数据库的连接的对象 

+	      Statement stmt = null; // 表示数据库的更新操作 

+	      String sql="insert into student(name,calssGrent,result) values('PS4','2333',' 2998')"; 

+	      System.out.println(sql) ; 

+	      // 1、使用Class类加载驱动程序 

+	      Class.forName("com.mysql.jdbc.Driver");  

+	      // 2、连接数据库 

+	      conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS); 

+	      // 3、Statement接口需要通过Connection接口进行实例化操作 

+	      stmt = conn.createStatement(); 

+	  

+	      ResultSet rs=stmt.executeQuery("select *from student"); 

+	      out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 

+	      out.println("<HTML>"); 

+	      out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 

+	      out.println(" <BODY>"); 

+	      out.println(" <center><font size='14px'> 设备管理系统"); 

+	      out.println("</font> </center>"); 

+	      //输出表头部分 

+	      out.print("<table align='center' border='1'><tr><td>设备名称" + 

+	      "</td><td>数量</td><td>价格</td><td>修改</td><td>删除</td></tr>"); 

+	      while(rs.next()) 

+	      { 

+	        //获取数据库中的ID 

+	        String name=rs.getString("name"); 

+	        

+	        //输出一列元素 

+	        out.print("<tr><td>"+rs.getString("name") 

+	        +"</td><td>"+rs.getString("calssGrent")+"" + 

+	        "</td><td>"+rs.getString("result")+"</td>" + 

+	        "<td><a href='UpdatePage?name="+name+"'>修改</a></td>" + 

+	        "<td><a href='delete?name="+name+"'> 删除 </a></td></tr>"); 

+	          

+	      } 

+	      out.println("<td><a href=AddPage>添加数据</a></td>"); 

+	      out.println(" </BODY>"); 

+	      out.println("</HTML>");  

+	      conn.close(); 

+	        

+	    } 

+	    catch (Exception e) 

+	    { 

+	      e.printStackTrace(); 

+	    } 

+	    out.flush(); 

+	    out.close(); 

+	  } 

+	  

+	}

+ 82 - 0
Update.java
Parādīt failu 

@@ -0,0 +1,82 @@
 
+package org.lsy.servlet; 

+  

+import java.io.IOException; 

+import java.io.PrintWriter; 

+import java.sql.Connection; 

+import java.sql.DriverManager; 

+import java.sql.Statement; 

+  

+import javax.servlet.ServletException; 

+import javax.servlet.http.HttpServlet; 

+import javax.servlet.http.HttpServletRequest; 

+import javax.servlet.http.HttpServletResponse; 

+  

+public class Update extends HttpServlet 

+{ 

+  // 驱动程序就是之前在classpath中配置的jdbc的驱动程序的jar包中 

+  

+

+	  

+	  // 连接地址是由各个数据库生产商单独提供的，所以需要单独记住 

+	  public static final String DBURL = "jdbc:mysql://localhost:3306/kui"; 

+	  // 连接数据库的用户名 

+	  public static final String DBUSER = "root"; 

+	  // 连接数据库的密码 

+	  public static final String DBPASS = "001011"; 

+	  

+  

+	  public void doGet(HttpServletRequest request, HttpServletResponse response) 

+		      throws ServletException, IOException 

+		  { 

+		    try

+		      

+		    { 

+		      request.setCharacterEncoding("UTF-8"); 

+		      response.setCharacterEncoding("UTF-8");      	    

+		      response.setContentType("text/html;UTF-8");

+		      PrintWriter out = response.getWriter();  

+		      Connection conn = null; // 表示数据库的连接的对象 

+		      Statement stmt = null; // 表示数据库的更新操作 

+		      //获取表单提交的参数 

+		      String name=request.getParameter("name"); 

+		      

+		    

+		      String grent=request.getParameter("grent"); 

+		      String result=request.getParameter("result"); 

+		      //更新SQL 

+		      String sqlString="update student set name='"+name+"' ," + 

+		          "calssGrent='"+grent+"',result='"+result+"' where name='"+name+"' ";  

+		      // 1、使用Class类加载驱动程序 

+		      Class.forName("com.mysql.jdbc.Driver");  

+		      // 2、连接数据库 

+		      conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS); 

+		      // 3、Statement接口需要通过Connection接口进行实例化操作 

+		      stmt = conn.createStatement(); 

+		      int pd=stmt.executeUpdate(sqlString); 

+		      if(pd!=0) 

+		      { 

+		      out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 

+		      out.println("<HTML>"); 

+		      out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 

+		      out.println(" <BODY>"); 

+		      out.print(" 更新成功<br><a href=MMC_01>查看列表</a> "); 

+		      out.println(" </BODY>"); 

+		      out.println("</HTML>"); 

+		      } 

+		      out.flush(); 

+		      out.close(); 

+		      stmt.close(); 

+		      conn.close(); 

+		    } 

+		    catch (Exception e) 

+		    { 

+		      // TODO: handle exception 

+		    } 

+		  } 

+		  public void doPost(HttpServletRequest request, HttpServletResponse response) 

+		      throws ServletException, IOException 

+		  { 

+		    doGet(request, response); 

+		  } 

+		  

+		}

+ 70 - 0
UpdatePage.java
Parādīt failu 

@@ -0,0 +1,70 @@
 
+package org.lsy.servlet; 

+import java.io.IOException; 

+import java.io.PrintWriter; 

+import java.sql.Connection; 

+import java.sql.DriverManager; 

+import java.sql.ResultSet; 

+import java.sql.Statement; 

+  

+import javax.servlet.ServletException; 

+import javax.servlet.http.HttpServlet; 

+import javax.servlet.http.HttpServletRequest; 

+import javax.servlet.http.HttpServletResponse; 

+

+  

+public class UpdatePage extends HttpServlet 

+{ 

+  // 连接地址是由各个数据库生产商单独提供的，所以需要单独记住 

+	 public static final String DBURL = "jdbc:mysql://localhost:3306/kui"; 

+	  // 连接数据库的用户名 

+	  public static final String DBUSER = "root"; 

+	  // 连接数据库的密码 

+	  public static final String DBPASS = "001011"; 

+	  

+  public void doGet(HttpServletRequest request, HttpServletResponse response) 

+      throws ServletException, IOException 

+  { 

+    String name=request.getParameter("name"); 

+    //设置请求和响应的编码 ，不然页面上容易出现乱码 

+    request.setCharacterEncoding("UTF-8"); 

+    response.setCharacterEncoding("UTF-8");  

+    response.setContentType("text/html;UTF-8"); 

+    PrintWriter out = response.getWriter(); 

+    try

+    { 

+      Connection conn = null; // 表示数据库的连接的对象 

+      Statement stmt = null; // 表示数据库的更新操作 

+      // 1、使用Class类加载驱动程序 

+      Class.forName("com.mysql.jdbc.Driver");  

+      // 2、连接数据库 

+      conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS); 

+      // 3、Statement接口需要通过Connection接口进行实例化操作 

+      stmt = conn.createStatement(); 

+      //用 rs获取查询结果 

+      ResultSet rs=stmt.executeQuery("select * from student where name='"+name+"'"); 

+      while (rs.next()) 

+      { 

+      out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 

+      out.println("<HTML>"); 

+      out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 

+      out.println(" <BODY>"); 

+      //输入成绩的表单，提交至Update 

+      out.print(" <form action='Update' method='get'> "); 

+      out.print("<table align='center'> <tr><td>设备名称：<input type='text' value='"+rs.getString("name")+"' name='name' size=20 ></td></tr>"); 

+      out.print("<tr><td>数量：<input type='text' value='"+rs.getString("calssGrent")+"' name='grent' size=20></td></tr>"); 

+      out.print("<tr><td>价格：<input type='text' value='"+rs.getString("result")+"' name='result' size=20></td></tr>");   

+      //为了作为查询数据库的条件 ，这里要把ID传过去 

+      out.print("<input type='hidden' value='"+name+"' name='name'>"); 

+      out.print("<tr><td><input type='submit' value='修改'><input type='reset' value='重置'></td></tr></table></form>"); 

+      out.print(" </BODY>"); 

+      out.println("</HTML>"); 

+      } 

+      out.flush(); 

+      out.close(); 

+    } 

+    catch (Exception e) { 

+      e.printStackTrace();// TODO: handle exception 

+    } 

+    } 

+  

+}