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  • jsp连接mysql的增删改操作

    create database addressdb;

    use addressdb;

    create table addressList(

      id int primary key,

      name varchar(20),

      phone varchar(20),

      address varchar(100),

      email varchar(40)

    );

    //AddressBean.java

    package beans;

    public class AddressBean {
     private int id;
     private String name;
     private String phone;
     private String address;
     private String email;

     public int getId() {
      return id;
     }

     public void setId(int id) {
      this.id = id;
     }

     public String getName() {
      return name;
     }

     public void setName(String name) {
      this.name = name;
     }

     public String getPhone() {
      return phone;
     }

     public void setPhone(String phone) {
      this.phone = phone;
     }

     public String getAddress() {
      return address;
     }

     public void setAddress(String address) {
      this.address = address;
     }

     public String getEmail() {
      return email;
     }

     public void setEmail(String email) {
      this.email = email;
     }
    }

    //AddressDemo.java

    package beans;

    import java.sql.Connection;
    import java.sql.PreparedStatement;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    import java.util.ArrayList;
    import java.util.Collection;

    public class AddressDemo extends ConnBean {
     private Connection connection = null;

     public void closePstmt(PreparedStatement pstmt) {
      try {
       if (connection != null)
        connection.close();
       connection = null;
      } catch (SQLException e3) {
       e3.printStackTrace();
      }
     }

     public AddressBean[] getAllRecords() {
      ResultSet rs = null;
      PreparedStatement pstmt = null;
      Collection list = new ArrayList();
      try {
       connection = getConnection();
       pstmt = connection.prepareStatement("select * from addresslist");
       rs = pstmt.executeQuery();
       while (rs.next()) {
        AddressBean address = new AddressBean();
        address.setId(rs.getInt(1));
        address.setName(rs.getString(2));
        address.setPhone(rs.getString(3));
        address.setAddress(rs.getString(4));
        address.setEmail(rs.getString(5));
        list.add(address);
       }
      } catch (SQLException e) {
       e.printStackTrace();
      } finally {
       closePstmt(pstmt);
       closeConnection(connection);
      }
      AddressBean[] records = (AddressBean[]) list
        .toArray(new AddressBean[0]);
      return records;
     }

     public boolean insertRecord(AddressBean record) {
      
      PreparedStatement pstmt = null;
      String insertStr = "insert into addressList values(?,?,?,?,?)";
      try {
       connection = getConnection();
       pstmt = connection.prepareStatement(insertStr);
       pstmt.setInt(1, record.getId());
       pstmt.setString(2, ChineseStr(record.getName()));
       pstmt.setString(3, ChineseStr(record.getPhone()));
       pstmt.setString(4, ChineseStr(record.getAddress()));
       pstmt.setString(5, ChineseStr(record.getEmail()));
       pstmt.execute();
      } catch (SQLException e) {
       e.printStackTrace();
      } finally {
       closePstmt(pstmt);
       closeConnection(connection);
      }
      return true;
     }
     public String ChineseStr(String str) {                   //过滤函数
      if (str == null) {
       str = "";
      } else {
       try {
        str = (new String(str.getBytes("iso-8859-1"), "utf-8")).trim();
       } catch (Exception e) {
        e.printStackTrace(System.err);
       }
      }
      return str;
     }

     public boolean deleteRecord(AddressBean record) {
      PreparedStatement pstmt = null;
      String deleteStr = "delete from addressList where id=?";
      if (record == null)
       return false;
      try {
       connection=getConnection();
       pstmt = connection.prepareStatement(deleteStr);
       pstmt.setInt(1, record.getId());
       pstmt.execute();
      } catch (SQLException e) {
       e.printStackTrace();
      } finally {
       closePstmt(pstmt);
       closeConnection(connection);
      }
      return true;
     }

     public boolean updateRecord(AddressBean ro, AddressBean rn) {
      if (ro == null || rn == null)
       return false;
      PreparedStatement pstmt = null;
      String updateStr = "update addressList set name=?,phone=?,address=?,email=?";
      updateStr = updateStr + "where id=" + ro.getId();
      try {
       connection = getConnection();
       pstmt = connection.prepareStatement(updateStr);
       pstmt.setString(1, rn.getName());
       pstmt.setString(2, rn.getPhone());
       pstmt.setString(3, rn.getAddress());
       pstmt.setString(4, rn.getEmail());
       pstmt.executeUpdate();
      } catch (SQLException e) {
       e.printStackTrace();
      } finally {
       closePstmt(pstmt);
       closeConnection(connection);
      }
      return true;
     }

    }

    //ConnBean.java

    package beans;

    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.SQLException;

    public class ConnBean {
     private String driver = "com.mysql.jdbc.Driver";
     private String jdbcurl = "jdbc:mysql://localhost:3306/";
     private String database = "addressDB";
     private String userName = "root";
     private String password = "110";
     private Connection connection = null;

     public ConnBean() {
      getConnection();
     }

     public Connection getConnection() {
      try {
       Class.forName(driver);
       connection = DriverManager.getConnection(jdbcurl + database,
         userName, password);
      } catch (ClassNotFoundException e1) {
       e1.printStackTrace();
      } catch (SQLException e2) {
       e2.printStackTrace();
      }
      return connection;
     }

     public void closeConnection(Connection connection) {
      try {
       if (connection != null)
        connection.close();
       connection = null;
      } catch (SQLException e3) {
       e3.printStackTrace();
      }
     }

     public String getDriver() {
      return driver;
     }

     public void setDriver(String driver) {
      this.driver = driver;
     }

     public String getJdbcurl() {
      return jdbcurl;
     }

     public void setJdbcurl(String jdbcurl) {
      this.jdbcurl = jdbcurl;
     }

     public String getDatabase() {
      return database;
     }

     public void setDatabase(String database) {
      this.database = database;
     }

     public String getUserName() {
      return userName;
     }

     public void setUserName(String userName) {
      this.userName = userName;
     }

     public String getPassword() {
      return password;
     }

     public void setPassword(String password) {
      this.password = password;
     }

    }

    // AddressLook.jsp查询

    <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
    <%@ page import="beans.*"%>
    <%@ page import="java.sql.*"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>通讯录</title>
    </head>
    <!-- <script language="javascript">
     function add() {
      document.frm1.action="Index.jsp"
       document.frm1.submit()

     }
    </script> -->
    <body>
     <jsp:useBean id="conn" scope="session" class="beans.AddressDemo" />
     <center>
      <table border="1">
       <caption>通讯录</caption>
       <tr>
        <td>编号</td>
        <td>姓名</td>
        <td>电话</td>
        <td>地址</td>
        <td>E-mail</td>
       </tr>
       <%
        request.setCharacterEncoding("UTF-8");
        AddressBean[] records = conn.getAllRecords();
        if (records != null) {
         for (int i = 0; i < records.length; i++) {
          out.println("<tr>");
          out.println("<td>" + records[i].getId() + "</td>");
          out.println("<td>" + records[i].getName() + "</td>");
          out.println("<td>" + records[i].getPhone() + "</td>");
          out.println("<td>" + records[i].getAddress() + "</td>");
          out.println("<td>" + records[i].getEmail() + "</td>"
            + "</tr>");
         }
        }
       %>

      </table>
      <hr>
      <hr>
      <hr>
      <input type="button" value="添加"
       onclick="javascript:location.href='AddressInsert.jsp'" /> <input
       type="button" value="删除"
       onclick="javascript:location.href='AddressDelete.jsp'" />
     </center>
    </body>
    </html>

    //AddressInsert.jsp  添加

    <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
    <%@ page import="beans.AddressBean,beans.ConnBean"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>添加纪录</title>
    </head>
    <body>

     <table>
      <form action="" method="post">
       <center>添加记录</center>
      <tr>
       <td>编号</td>
       <td><input type="text" name="id" colspan="2" /></td>
      </tr>
      <tr>
       <td>姓名</td>
       <td><input type="text" name="name" colspan="2" /></td>
      </tr>
      <tr>
       <td>电话</td>
       <td><input type="text" name="phone" colspan="2" /></td>
      </tr>
      <tr>
       <td>地址</td>
       <td><input type="text" name="address" colspan="2"></td>
      </tr>
      <tr>
       <td>E-mail</td>
       <td><textarea name="email" cols="20" rows="5" colspan="2"></textarea></td>
      </tr>
      <tr>
       <td><input type="submit" value="添加"></td>
       <td><input type="reset" value="重置"></td>
       <td><input type="button" value="查看"
        onclick="javascript:location.href='AddressLook.jsp'" /></td>
      </tr>
      </form>
     </table>
     <jsp:useBean id="add" scope="session" class="beans.AddressBean"></jsp:useBean>
     <jsp:setProperty property="*" name="add" />
     <jsp:useBean id="conn" scope="session" class="beans.AddressDemo"></jsp:useBean>
     <%
      if (add.getId() != 0 && conn.insertRecord(add))
       out.println("添加成功!");
     %>
    </body>
    </html>

    //AddressDelete.jsp 删除

    <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
    <%@ page import="beans.*"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>删除数据</title>
    </head>
    <body>
     <p>
      <jsp:useBean id="conn" scope="session" class="beans.AddressDemo" />
     <form action="" method="post">
      <table border="1">
       <caption>通讯录</caption>
       <tr>
        <th>编号</th>
        <th>姓名</th>
        <th>电话</th>
        <th>地址</th>
        <th>E-mail</th>
        <th>选择</th>
       </tr>
       <%
        AddressBean[] records = conn.getAllRecords();
        if (records != null) {
         for (int i = 0; i < records.length; i++) {
          out.println("<tr>" + "<td>" + records[i].getId() + "</td>");
          out.println("<td>" + records[i].getName() + "</td>");
          out.println("<td>" + records[i].getPhone() + "</td>");
          out.println("<td>" + records[i].getAddress() + "</td>");
          out.println("<td>" + records[i].getEmail() + "</td>");
       %>
       <td><input type="checkbox" name="<%="check" + i%>"
        value="<%=i%>"></td>
       <%
        out.println("</tr>");
         }
        }
       %>
      </table>
      <input type="submit" value="提交" />
     </form>
     <%
      String[] check = new String[records.length];
      for (int i = 0; i < check.length; i++) {
       check[i] = request.getParameter("check" + i);
       if (check[i] == null)
        check[i] = "";
       if (check[i].equals("" + i)) {
        if (conn.deleteRecord(records[i])) {
         out.println("<hr>删除成功!");
         response.setHeader("refresh", "1");
        }
       }
      }
     %>
     </p>
    </body>
    </html>

    注意:两种乱码。一种为网数据库写入的信息为乱码,可以采用“过滤函数”。另一种为接收数据显示乱码,可以用代码转换“request.setCharacterEncoding("UTF-8");”。

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  • 原文地址:https://www.cnblogs.com/atwanli/p/2776368.html
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