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简单MVC实现增删改查
反射工具类RelfectionUtils
1 package Utils; 2 3 import java.lang.reflect.Field; 4 import java.lang.reflect.InvocationTargetException; 5 import java.lang.reflect.Method; 6 import java.lang.reflect.Modifier; 7 import java.lang.reflect.ParameterizedType; 8 import java.lang.reflect.Type; 9 10 /** 11 * 反射的 Utils 函数集合 12 * 提供访问私有变量, 获取泛型类型 Class, 提取集合中元素属性等 Utils 函数 13 * @author Administrator 14 * 15 */ 16 public class ReflectionUtils { 17 18 19 /** 20 * 通过反射, 获得定义 Class 时声明的父类的泛型参数的类型 21 * 如: public EmployeeDao extends BaseDao<Employee, String> 22 * @param clazz 23 * @param index 24 * @return 25 */ 26 @SuppressWarnings("unchecked") 27 public static Class getSuperClassGenricType(Class clazz, int index){ 28 Type genType = clazz.getGenericSuperclass(); 29 30 if(!(genType instanceof ParameterizedType)){ 31 return Object.class; 32 } 33 34 Type [] params = ((ParameterizedType)genType).getActualTypeArguments(); 35 36 if(index >= params.length || index < 0){ 37 return Object.class; 38 } 39 40 if(!(params[index] instanceof Class)){ 41 return Object.class; 42 } 43 44 return (Class) params[index]; 45 } 46 47 /** 48 * 通过反射, 获得 Class 定义中声明的父类的泛型参数类型 49 * 如: public EmployeeDao extends BaseDao<Employee, String> 50 * @param <T> 51 * @param clazz 52 * @return 53 */ 54 @SuppressWarnings("unchecked") 55 public static<T> Class<T> getSuperGenericType(Class clazz){ 56 return getSuperClassGenricType(clazz, 0); 57 } 58 59 /** 60 * 循环向上转型, 获取对象的 DeclaredMethod 61 * @param object 62 * @param methodName 63 * @param parameterTypes 64 * @return 65 */ 66 public static Method getDeclaredMethod(Object object, String methodName, Class<?>[] parameterTypes){ 67 68 for(Class<?> superClass = object.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()){ 69 try { 70 //superClass.getMethod(methodName, parameterTypes); 71 return superClass.getDeclaredMethod(methodName, parameterTypes); 72 } catch (NoSuchMethodException e) { 73 //Method 不在当前类定义, 继续向上转型 74 } 75 //.. 76 } 77 78 return null; 79 } 80 81 /** 82 * 使 filed 变为可访问 83 * @param field 84 */ 85 public static void makeAccessible(Field field){ 86 if(!Modifier.isPublic(field.getModifiers())){ 87 field.setAccessible(true); 88 } 89 } 90 91 /** 92 * 循环向上转型, 获取对象的 DeclaredField 93 * @param object 94 * @param filedName 95 * @return 96 */ 97 public static Field getDeclaredField(Object object, String filedName){ 98 99 for(Class<?> superClass = object.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()){ 100 try { 101 return superClass.getDeclaredField(filedName); 102 } catch (NoSuchFieldException e) { 103 //Field 不在当前类定义, 继续向上转型 104 } 105 } 106 return null; 107 } 108 109 /** 110 * 直接调用对象方法, 而忽略修饰符(private, protected) 111 * @param object 112 * @param methodName 113 * @param parameterTypes 114 * @param parameters 115 * @return 116 * @throws InvocationTargetException 117 * @throws IllegalArgumentException 118 */ 119 public static Object invokeMethod(Object object, String methodName, Class<?> [] parameterTypes, 120 Object [] parameters) throws InvocationTargetException{ 121 122 Method method = getDeclaredMethod(object, methodName, parameterTypes); 123 124 if(method == null){ 125 throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + object + "]"); 126 } 127 128 method.setAccessible(true); 129 130 try { 131 return method.invoke(object, parameters); 132 } catch(IllegalAccessException e) { 133 System.out.println("不可能抛出的异常"); 134 } 135 136 return null; 137 } 138 139 /** 140 * 直接设置对象属性值, 忽略 private/protected 修饰符, 也不经过 setter 141 * @param object 142 * @param fieldName 143 * @param value 144 */ 145 public static void setFieldValue(Object object, String fieldName, Object value){ 146 Field field = getDeclaredField(object, fieldName); 147 148 if (field == null) 149 throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + object + "]"); 150 151 makeAccessible(field); 152 153 try { 154 field.set(object, value); 155 } catch (IllegalAccessException e) { 156 System.out.println("不可能抛出的异常"); 157 } 158 } 159 160 /** 161 * 直接读取对象的属性值, 忽略 private/protected 修饰符, 也不经过 getter 162 * @param object 163 * @param fieldName 164 * @return 165 */ 166 public static Object getFieldValue(Object object, String fieldName){ 167 Field field = getDeclaredField(object, fieldName); 168 169 if (field == null) 170 throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + object + "]"); 171 172 makeAccessible(field); 173 174 Object result = null; 175 176 try { 177 result = field.get(object); 178 } catch (IllegalAccessException e) { 179 System.out.println("不可能抛出的异常"); 180 } 181 182 return result; 183 } 184 }
jdbcutils
1 package Utils; 2 3 import java.sql.Connection; 4 import java.sql.SQLException; 5 6 import javax.sql.DataSource; 7 8 import com.mchange.v2.c3p0.ComboPooledDataSource; 9 10 public class JdbcUtil { 11 12 public static void reaseConnection(Connection connection) { 13 try { 14 if(connection!=null){ 15 connection.close(); 16 } 17 } catch (SQLException e) { 18 // TODO Auto-generated catch block 19 e.printStackTrace(); 20 } 21 } 22 private static DataSource dataSource = null; 23 static{ 24 dataSource = new ComboPooledDataSource("mvc"); 25 } 26 27 public static DataSource getDataSource(){ 28 return dataSource; 29 } 30 31 public static Connection getConnection(){ 32 try { 33 return dataSource.getConnection(); 34 } catch (SQLException e) { 35 // TODO Auto-generated catch block 36 //e.printStackTrace(); 37 System.out.println("连接失败"); 38 } 39 return null; 40 41 } 42 }
DAO操作类 依靠c3p0，dbutil
1 package com.mvc.dao; 2 3 import java.lang.reflect.ParameterizedType; 4 import java.lang.reflect.Type; 5 import java.sql.Connection; 6 import java.sql.PreparedStatement; 7 import java.sql.SQLException; 8 import java.util.ArrayList; 9 import java.util.List; 10 11 import org.apache.commons.dbutils.QueryRunner; 12 import org.apache.commons.dbutils.handlers.BeanHandler; 13 import org.apache.commons.dbutils.handlers.BeanListHandler; 14 import org.apache.commons.dbutils.handlers.ScalarHandler; 15 import org.apache.el.util.ReflectionUtil; 16 17 import com.sun.org.apache.bcel.internal.generic.NEW; 18 19 import Utils.JdbcUtil; 20 import Utils.ReflectionUtils; 21 22 public class Dao<T> { 23 private Class<T> clazz; 24 private QueryRunner queryRunner= new QueryRunner(JdbcUtil.getDataSource()); 25 public Dao() { 26 clazz = ReflectionUtils.getSuperGenericType(this.getClass()); 27 } 28 public <E> E getForValue(String sql,Object ...arg){ 29 try { 30 return (E) queryRunner.query(sql,new ScalarHandler(),arg); 31 } catch (SQLException e) { 32 // TODO Auto-generated catch block 33 e.printStackTrace(); 34 System.out.println("getForValue error"); 35 } 36 return null; 37 38 } 39 public List<T> getForList(String sql,Object ...args){ 40 try { 41 return queryRunner.query(sql, new BeanListHandler<>(clazz),args); 42 } catch (SQLException e) { 43 System.out.println("getForList error"); 44 } 45 return null; 46 47 48 } 49 public T get(String sql,Object ...args){ 50 try { 51 return queryRunner.query(sql,new BeanHandler<>(clazz),args); 52 } catch (SQLException e) { 53 // TODO Auto-generated catch block 54 //e.printStackTrace(); 55 System.out.println("get error"); 56 } 57 return null; 58 } 59 60 public void updata(String sql,Object ...args){ 61 try { 62 queryRunner.update(sql,args); 63 } catch (SQLException e) { 64 // TODO Auto-generated catch block 65 //e.printStackTrace(); 66 System.out.println("updata error"); 67 } 68 } 69 }
Customer类
package com.mvc.domain; public class Customer { private String id; private String name; private String address; private String phone; private int count; public Customer() { super(); } public Customer(String id, String name, String address, String phone) { super(); this.id = id; this.name = name; this.address = address; this.phone = phone; this.count = 0; } public int getCount() { return count; } public void setCount(int count) { this.count = count; } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } @Override public String toString() { return "Customer [id=" + id + ", name=" + name + ", address=" + address + ", phone=" + phone + "]"; } }
CustomerDao接口
1 package com.mvc.dao; 2 3 import java.util.List; 4 5 import com.mvc.domain.CriteriaCustomer; 6 import com.mvc.domain.Customer; 7 8 public interface CustomerDao { 9 public List<Customer> getAll(); 10 public void save(Customer customer); 11 public void upCount(Customer customer); 12 public void upAll(Customer customer); 13 public Customer getForIdName(String id,String name); 14 public Customer getForId(String id); 15 public void delete(String id); 16 public long getCountWithName(String name); 17 public long getCountWithId(String id); 18 public List<Customer> getCriteriaCustomers(CriteriaCustomer cc); 19 }
操作类
1 package com.mvc.jdbc; 2 3 import java.sql.SQLException; 4 import java.util.List; 5 6 import com.mvc.dao.CustomerDao; 7 import com.mvc.dao.Dao; 8 import com.mvc.domain.CriteriaCustomer; 9 import com.mvc.domain.Customer; 10 11 public class CustomerDaoJdbc extends Dao<Customer> implements CustomerDao{ 12 13 @Override 14 public List<Customer> getAll(){ 15 // TODO Auto-generated method stub 16 String sql = "SELECT * FROM customer"; 17 return getForList(sql); 18 } 19 20 @Override 21 public void save(Customer customer) { 22 // TODO Auto-generated method stub 23 String sql = "insert into customer(id,name,address,phone,count) value(?,?,?,?,?)"; 24 updata(sql,customer.getId(),customer.getName(),customer.getAddress(),customer.getPhone(),customer.getCount()); 25 26 } 27 28 @Override 29 public void upAll(Customer customer) { 30 // TODO Auto-generated method stub 31 String sql = "UPDATE customer SET NAME=?,ADDRESS=?,PHONE=? WHERE ID=?"; 32 updata(sql,customer.getName(),customer.getAddress(),customer.getPhone(),customer.getId()); 33 34 } 35 36 @Override 37 public void upCount(Customer customer) { 38 // TODO Auto-generated method stub 39 String sql = "UPDATE customer SET COUNT=? WHERE ID=?"; 40 updata(sql,customer.getCount(),customer.getId()); 41 } 42 43 @Override 44 public Customer getForIdName(String id,String name) { 45 // TODO Auto-generated method stub 46 String sql = "SELECT id,name,address,phone,count FROM customer where id = ? and name = ?"; 47 return get(sql,id,name); 48 } 49 @Override 50 public Customer getForId(String id) { 51 // TODO Auto-generated method stub 52 String sql = "SELECT id,name,address,phone,count FROM customer where id = ?"; 53 return get(sql,id); 54 } 55 @Override 56 public void delete(String id) { 57 // TODO Auto-generated method stub 58 String sql = "delete from customer where ID = ? "; 59 updata(sql,id); 60 61 } 62 63 @Override 64 public long getCountWithName(String name) { 65 // TODO Auto-generated method stub 66 String sql = "select count(id) from customer where name = ?"; 67 return (long)getForValue(sql, name); 68 } 69 70 @Override 71 public List<Customer> getCriteriaCustomers(CriteriaCustomer cc) { 72 // TODO Auto-generated method stub 73 String sql = "SELECT * FROM customer WHERE NAME LIKE ? AND address LIKE ? AND phone LIKE ?"; 74 System.out.println(cc.getName()+cc.getAddress()+cc.getPhone()); 75 return getForList(sql,cc.getName(),cc.getAddress(),cc.getPhone()); 76 } 77 78 @Override 79 public long getCountWithId(String id) { 80 // TODO Auto-generated method stub 81 String sql = "select count(id) from customer where id= ?"; 82 return (long)getForValue(sql, id); 83 } 84 85 86 87 88 89 90 91 92 93 }
servlet
1 package com.mvc.servlet; 2 3 import java.io.IOException; 4 import java.lang.reflect.Method; 5 import java.util.ArrayList; 6 import java.util.List; 7 8 import javax.servlet.ServletException; 9 import javax.servlet.annotation.WebServlet; 10 import javax.servlet.http.HttpServlet; 11 import javax.servlet.http.HttpServletRequest; 12 import javax.servlet.http.HttpServletResponse; 13 14 import com.mvc.dao.CustomerDao; 15 import com.mvc.domain.CriteriaCustomer; 16 import com.mvc.domain.Customer; 17 import com.mvc.jdbc.CustomerDaoJdbc; 18 import com.sun.corba.se.impl.protocol.giopmsgheaders.Message; 19 20 import jdk.nashorn.internal.ir.RuntimeNode.Request; 21 22 /** 23 * Servlet implementation class SqlServlet 24 */ 25 @WebServlet("/SqlServlet") 26 public class SqlServlet extends HttpServlet { 27 private static final long serialVersionUID = 1L; 28 29 /** 30 * @see HttpServlet#HttpServlet() 31 */ 32 CustomerDao customerDao = null; 33 34 public SqlServlet() { 35 super(); 36 // TODO Auto-generated constructor stub 37 customerDao = new CustomerDaoJdbc(); 38 } 39 40 /** 41 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse 42 * response) 43 */ 44 protected void doGet(HttpServletRequest request, 45 HttpServletResponse response) throws ServletException, IOException { 46 // TODO Auto-generated method stub 47 doPost(request, response); 48 } 49 50 /** 51 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse 52 * response) 53 */ 54 protected void doPost(HttpServletRequest request, 55 HttpServletResponse response) throws ServletException, IOException { 56 // TODO Auto-generated method stub 57 request.setCharacterEncoding("utf-8"); 58 String servletPath = request.getServletPath(); 59 // System.out.println(servletPath); 60 servletPath = servletPath.substring(1, servletPath.length() - 3); 61 try { 62 Method method = getClass().getDeclaredMethod(servletPath, 63 HttpServletRequest.class, HttpServletResponse.class); 64 method.invoke(this, request, response); 65 } catch (Exception e) { 66 // TODO Auto-generated catch block 67 e.printStackTrace(); 68 } 69 70 } 71 72 @SuppressWarnings("unused") 73 private void edit(HttpServletRequest request, HttpServletResponse response) 74 throws ServletException, IOException { 75 System.out.println("edit"); 76 String id = request.getParameter("id"); 77 System.out.println(id); 78 Customer customer = customerDao.getForId(id); 79 System.out.println(customer); 80 request.setAttribute("customer", customer); 81 request.getRequestDispatcher("/updata.jsp").forward(request, response); 82 } 83 84 @SuppressWarnings("unused") 85 private void updata(HttpServletRequest request, HttpServletResponse response) 86 throws ServletException, IOException { 87 System.out.println("updata"); 88 String id = request.getParameter("id"); 89 String name = request.getParameter("name"); 90 String address = request.getParameter("address"); 91 String phone = request.getParameter("phone"); 92 Customer customer = new Customer(id, name, address, phone); 93 String massage; 94 massage = "修改成功"; 95 customerDao.upAll(customer); 96 request.setAttribute("massage", massage); 97 request.setAttribute("customer", customer); 98 request.getRequestDispatcher("/updata.jsp").forward(request, response); 99 100 } 101 102 @SuppressWarnings("unused") 103 private void add(HttpServletRequest request, HttpServletResponse response) 104 throws ServletException, IOException { 105 System.out.println("add"); 106 String id = request.getParameter("id"); 107 String name = request.getParameter("name"); 108 String address = request.getParameter("address"); 109 String phone = request.getParameter("phone"); 110 Customer customer = new Customer(id, name, address, phone); 111 System.out.println(customer); 112 long count = customerDao.getCountWithName(name); 113 long count1 = customerDao.getCountWithId(id); 114 System.out.println("count:" + count); 115 request.setAttribute("id", id); 116 request.setAttribute("name", name); 117 request.setAttribute("address", address); 118 request.setAttribute("phone", phone); 119 if (count1 > 0) { 120 request.setAttribute("massage", "学号已存在，报名失败"); 121 request.getRequestDispatcher("/newcustomer.jsp").forward(request, 122 response); 123 } else { 124 request.setAttribute("massage", "报名成功"); 125 customerDao.save(customer); 126 request.getRequestDispatcher("/newcustomer.jsp").forward(request, 127 response); 128 } 129 } 130 131 @SuppressWarnings("unused") 132 private void delete(HttpServletRequest request, HttpServletResponse response) 133 throws IOException { 134 System.out.println("delete"); 135 String id = request.getParameter("id"); 136 System.out.println(id); 137 //customerDao.delete(id); 138 139 //response.sendRedirect("query.do"); 140 } 141 142 @SuppressWarnings("unused") 143 private void query(HttpServletRequest request, HttpServletResponse response) { 144 String name = request.getParameter("name"); 145 String address = request.getParameter("address"); 146 String phone = request.getParameter("phone"); 147 System.out.println(name + address + phone); 148 System.out.println("query"); 149 CriteriaCustomer cc = new CriteriaCustomer(name, address, phone); 150 List<Customer> customers = customerDao.getCriteriaCustomers(cc); 151 request.setAttribute("customers", customers); 152 try { 153 request.getRequestDispatcher("/ypacm507.jsp").forward(request, 154 response); 155 } catch (ServletException | IOException e) { 156 // TODO Auto-generated catch block 157 e.printStackTrace(); 158 } 159 } 160 161 @SuppressWarnings("unused") 162 private void come(HttpServletRequest request, HttpServletResponse response) { 163 String name = request.getParameter("name"); 164 String id = request.getParameter("id"); 165 Customer customer = customerDao.getForIdName(id, name); 166 System.out.println(customer); 167 if (customer != null) { 168 request.setAttribute("massage", ""); 169 customer.setCount(customer.getCount() + 1); 170 customerDao.upCount(customer); 171 //response.sendRedirect("NewFile_1.jsp"); 172 try { 173 request.getRequestDispatcher("/NewFile_1.jsp").forward(request, 174 response); 175 } catch (ServletException | IOException e) { 176 // TODO Auto-generated catch block 177 e.printStackTrace(); 178 } 179 180 } else { 181 try { 182 String massage = "名字或学号错误"; 183 request.setAttribute("massage", massage); 184 request.setAttribute("id", id); 185 request.setAttribute("name", name); 186 request.getRequestDispatcher("/come.jsp").forward(request, 187 response); 188 } catch (ServletException | IOException e) { 189 // TODO Auto-generated catch block 190 e.printStackTrace(); 191 } 192 } 193 } 194 }
以下jsp代码 css样式等为网上找的素材
1.增加用户的jsp
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 8 <!--[if IE]><meta http-equiv="x-ua-compatible" content="IE=9" /><![endif]--> 9 <meta name="viewport" content="width=device-width, initial-scale=1"> 10 <meta name="description" content="Your Description Here"> 11 <meta name="keywords" 12 content="bootstrap themes, portfolio, responsive theme"> 13 <meta name="author" content="ThemeForces.Com"> 14 15 <!-- Favicons 16 ================================================== --> 17 <!-- <link rel="shortcut-icon" href="http://www.mamicode.com/img/favicon.ico" type="image/x-icon"> --> 18 <!-- <link rel="apple-touch-icon" href="http://www.mamicode.com/img/apple-touch-icon.png"> --> 19 <link rel="apple-touch-icon" sizes="72x72" 20 href="http://www.mamicode.com/img/apple-touch-icon-72x72.png"> 21 <link rel="apple-touch-icon" sizes="114x114" 22 href="http://www.mamicode.com/img/apple-touch-icon-114x114.png"> 23 24 <!-- Bootstrap --> 25 <link rel="stylesheet" type="text/css" href="http://www.mamicode.com/css/bootstrap.css"> 26 <!-- <link rel="stylesheet" type="text/css" 27 href="http://www.mamicode.com/fonts/font-awesome/css/font-awesome.css"> --> 28 29 <!-- Stylesheet 30 ================================================== --> 31 <link rel="stylesheet" type="text/css" href="http://www.mamicode.com/css/style.css"> 32 <!-- <link rel="stylesheet" type="text/css" href="http://www.mamicode.com/css/responsive.css"> --> 33 34 <!-- <script type="text/javascript" src="http://www.mamicode.com/js/modernizr.custom.js"></script> --> 35 36 37 <title></title> 38 </head> 39 <body> 40 <h3 style="text-align: center;"><font color="red"><c:out value="http://www.mamicode.com/${massage}"></c:out></font></h3> 41 <div id="tf-contact"> 42 <div class="container"> 43 <div class="section-title"> 46 <hr> 47 </div> 48 49 <div class="space"></div> 50 51 <div class="row"> 52 <div class="col-md-6 col-md-offset-3"> 53 <form id="contact" action="add.do" method="post"> 54 <div class="form-group"> 55 <input class="form-control" id="exampleInputEmail1" type="text" 56 name="id" value="http://www.mamicode.com/${id}" placeholder="长学号" /> 57 </div> 58 59 <div class="form-group"> 60 <input class="form-control" type="text" name="name" 61 value="http://www.mamicode.com/${name}" placeholder="姓名" /> 62 </div> 63 64 65 <div class="form-group"> 66 <input class="form-control" type="text" name="address" 67 value="http://www.mamicode.com/${address}" placeholder="班级" /> 68 </div> 69 70 <td><div class="form-group"> 71 <input class="form-control" type="text" name="phone" 72 value="http://www.mamicode.com/${phone}" placeholder="手机" /> 73 </div> 74 <input class="btn btn-primary my-btn dark" type="submit" 75 value="http://www.mamicode.com/--报名--" /> 76 </form> 77 </div> 78 </div> 79 </div> 80 </div> 81 <!-- <script type="text/javascript" src="http://www.mamicode.com/js/jquery.1.11.1.js"></script>--> 82 <!-- Include all compiled plugins (below), or include individual files as needed --> 83 <!-- <script type="text/javascript" src="http://www.mamicode.com/js/bootstrap.js"></script> --> 84 85 <!-- Javascripts 86 ================================================== --> 87 <!-- <script type="text/javascript" src="http://www.mamicode.com/js/main.js"></script>--> 88 </body> 89 </html>
2.查询
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 4 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 6 <html> 7 <head> 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 9 <title>Insert title here</title> 10 <script type="text/javascript" src="scripts/jquery-1.7.2.js"></script> 11 <script type="text/javascript">
21 </script> 22 </head> 23 <body> 24 25 <form action="query.do" method="post"> 26 <table> 27 <tr> 28 <td>CustomerName:</td> 29 <td><input type="text" name="name"/></td> 30 </tr> 31 <tr> 32 <td>Address:</td> 33 <td><input type="text" name="address"/></td> 34 </tr> 35 <tr> 36 <td>Phone:</td> 37 <td><input type="text" name="phone"/></td> 38 </tr> 39 <tr> 40 <td><input type="submit" value="Query"/></td> 41 <td><a href="newcustomer.jsp">Add New Customer</a></td> 42 </tr> 43 </table> 44 </form> 45 46 <br><br> 47 48 <c:if test="${!empty requestScope.customers }"> 49 50 <hr> 51 <br><br> 52 53 <table border="1" cellpadding="10" cellspacing="0"> 54 <tr> 55 <th>^ID</th> 56 <th>CustomerName</th> 57 <th>Address</th> 58 <th>Phone</th> 59 <th>UPDATE\DELETE</th> 60 </tr> 61 62 <c:forEach items="${requestScope.customers }" var="cust"> 63 64 <tr> 65 <td>${cust.id }</td> 66 <td>${cust.name }</td> 67 <td>${cust.address }</td> 68 <td>${cust.phone }</td> 69 <td> 70 <c:url value="/edit.do" var="editurl"> 71 <c:param name="id" value="${cust.id }"></c:param> 72 </c:url> 73 <a href="${editurl }">UPDATE</a> 74 <c:url value="/delete.do" var="deleteurl"> 75 <c:param name="id" value="${cust.id }"></c:param> 76 </c:url> 77 <a href="${deleteurl }" class="delete">DELETE</a> 78 </td> 79 </tr> 80 81 </c:forEach> 82 83 </table> 84 </c:if> 85 86 </body> 87 </html>
3.删除
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript" src="scripts/jquery-1.7.2.js"></script> </head> <body> <form action="query.do" method="post"> <table> <tr> <td>CustomerName:</td> <td><input type="text" name="name"/></td> </tr> <tr> <td>Address:</td> <td><input type="text" name="address"/></td> </tr> <tr> <td>Phone:</td> <td><input type="text" name="phone"/></td> </tr> <tr> <td><input type="submit" value="Query"/></td> <td><a href="newcustomer.jsp">Add New Customer</a></td> </tr> </table> </form> <br><br> <c:if test="${!empty requestScope.customers }"> <hr> <br><br> <table border="1" cellpadding="10" cellspacing="0"> <tr> <th>^ID</th> <th>CustomerName</th> <th>Address</th> <th>Phone</th> <th>UPDATE\DELETE</th> </tr> <c:forEach items="${requestScope.customers }" var="cust"> <tr> <td>${cust.id }</td> <td>${cust.name }</td> <td>${cust.address }</td> <td>${cust.phone }</td> <td> <c:url value="/edit.do" var="editurl"> <c:param name="id" value="${cust.id }"></c:param> </c:url> <a href="${editurl }">UPDATE</a> <c:url value="/delete.do" var="deleteurl"> <c:param name="id" value="${cust.id }"></c:param> </c:url> <a href="${deleteurl }" class="delete">DELETE</a> </td> </tr> </c:forEach> </table> </c:if> </body> </html>
4.修改
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <!--[if IE]><meta http-equiv="x-ua-compatible" content="IE=9" /><![endif]--> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="description" content="Your Description Here"> <meta name="keywords" content="bootstrap themes, portfolio, responsive theme"> <meta name="author" content="ThemeForces.Com"> <!-- Favicons ================================================== --> <link rel="shortcut icon" href="img/favicon.ico" type="image/x-icon"> <link rel="apple-touch-icon" href="img/apple-touch-icon.png"> <link rel="apple-touch-icon" sizes="72x72" href="img/apple-touch-icon-72x72.png"> <link rel="apple-touch-icon" sizes="114x114" href="img/apple-touch-icon-114x114.png"> <!-- Bootstrap --> <link rel="stylesheet" type="text/css" href="css/bootstrap.css"> <link rel="stylesheet" type="text/css" href="fonts/font-awesome/css/font-awesome.css"> <!-- Stylesheet ================================================== --> <link rel="stylesheet" type="text/css" href="css/style.css"> <link rel="stylesheet" type="text/css" href="css/responsive.css"> <script type="text/javascript" src="js/modernizr.custom.js"></script> <title></title> </head> <body> <c:if test="${requestScope.massage != null }"> <br> <h3 style="text-align: center;"><font color="red"><c:out value="${massage}"></c:out></font></h3> <br> <br> </c:if> <c:set var="id" value="${customer != null ? customer.id : param.id }"></c:set> <c:set var="name" value="${customer != null ? customer.name : param.name }"></c:set> <c:set var="address" value="${customer != null ? customer.address : param.address }"></c:set> <c:set var="phone" value="${customer != null ? customer.phone : param.phone }"></c:set> <div id="tf-contact"> <div class="container"> <div class="section-title"> <hr> </div> <div class="space"></div> <div class="row"> <div class="col-md-6 col-md-offset-3"> <form id="contact" action="updata.do" method="post"> <input type="hidden" name="id" value="${id }"></input> <div class="form-group"> <h4>姓名:</h4> <input class="form-control" type="text" name="name" value="${name}" placeholder="姓名" /> </div> <div class="form-group"> <h4>班级:</h4> <input class="form-control" type="text" name="address" value="${address}" placeholder="班级" /> </div> <div class="form-group"> <h4>手机:</h4> <input class="form-control" type="text" name="phone" value="${phone}" placeholder="手机" /> </div> <input class="btn btn-primary my-btn dark" type="submit" value="修改" /> </form> </div> </div> </div> </div> <script type="text/javascript" src="js/jquery.1.11.1.js"></script> <!-- Include all compiled plugins (below), or include individual files as needed --> <script type="text/javascript" src="js/bootstrap.js"></script> <!-- Javascripts ================================================== --> <script type="text/javascript" src="js/main.js"></script> </body> </html>
运行效果 增加信息
数据库内数据
简单MVC实现增删改查
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