用jsp实现一个简单的购物车web应用系统。 jsp实现简单聊天室

1. 在自己建立的WEB工程中,建立包shopcart.dto,在相应的包中添加类Product.java ,ShopCart.java

1./*类Product */

2.3.package shopcart.dto;

4.5.import java.io.Serializable;

6.7.public class Product implements Serializable

8.{

9. private String id;//产品标识 10. private String name;//产品名称 11. private String description;//产品描述 12. private double price;//产品价格 13.14. public Product()

15. {

16. }

17.18. public Product(String id, String name, String description, double price)

19. {

20. this.id = id;

21. this.name = name;

22. this.description = description;

23. this.price = price;

24. }

25.26. public void setId(String id)

27. {

28. this.id = id;

29. }

30.31. public void setName(String name)

32. {

33. this.name = name;

34. }

35.36. public void setDescription(String description)

37. {

38. this.description = description;

39. }

40.41. public void setPrice(double price)

42. {

43. this.price = price;

44. }

45.46. public String getId()

47. {

48. return id;

49. }

50.51. public String getName()

52. {

53. return name;

54. }

55.56. public String getDescription()

57. {

58. return description;

59. }

60.61. public double getPrice()

62. {

63. return price;

64. }

65.}

66./*类ShopCart */

67.68.package shopcart.dto;

69.70.import java.io.Serializable;

71.import java.util.*;

72.73.public class ShopCart implements Serializable

74.{

75. public ShopCart()

76. {

77. }

78.79. private List cart = null;

80.81. /**

82. * 添加一个产品到购物车

83. * @param product Product

84. */

85. public void addProductToCart(Product product)

86. {

87. if (cart == null)

88. cart = new ArrayList();

89. Iterator it = cart.iterator();

90. while (it.hasNext())

91. {

92. Product item = (Product) it.next();

93. if (item.getId().equals(product.getId()))

94. {

95. return;

96. }

97. }

98. cart.add(product);

99. }

100.101. /**

102. * 从购物车中删除一产品

103. * @param productId String 产品id

104. */

105. public void removeProductFromCart(String productId)

106. {

107. if (cart == null)

108. return;

109. Iterator it = cart.iterator();

110. while (it.hasNext())

111. {

112. Product item = (Product) it.next();

113. if (item.getId().equals(productId))

114. {

115. it.remove();

116. return;

117. }

118. }

119. }

120.121. /**

122. * 计算购物车中的商品价格

123. * @return double 商品价格总数

124. */

125. public double getAllProductPrice()

126. {

127. if (cart == null)

128. return 0;

129. double totalPrice = 0;

130. Iterator it = cart.iterator();

131. while (it.hasNext())

132. {

133. Product item = (Product) it.next();

134. totalPrice += item.getPrice();

135. }

136. return totalPrice;

137. }

138.139. /**

140. * 返回购物车所有产品信息

141. * @return List

142. */

143. public List getAllProductsFromCart()

144. {

145. return cart;

146. }

147.}

148.149.2.在WebRoot目录下添加包shopCart 在里边添加ShowProductsJSP.jsp ShoppingJSP.jsp ShopCartJSP.jsp

ShowProductsJSP.jsp :::::::::

1.<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

2.<%@ page import="shopcart.dto.*"%>

3.<%

4. String path = request.getContextPath();

5. String basePath = request.getScheme() + "://"

6. + request.getServerName() + ":" + request.getServerPort()

7. + path + "/";

8.%>

9.10.<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

11.<html>

12. <head>

13. <base href="<%=basePath%>">

14.15. <title>My JSP 'ShowProductsJSP.jsp' starting page</title>

16.17. <meta http-equiv="pragma" content="no-cache">

18. <meta http-equiv="cache-control" content="no-cache">

19. <meta http-equiv="expires" content="0">

20. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

21. <meta http-equiv="description" content="This is my page">

22. <!--

23. <link rel="stylesheet" type="text/css" href="styles.css">

24. -->

25.26. </head>

27.28. <body bgcolor="#ffffff">

29. <%

30. Map products = new HashMap();

31. products.put("001", new Product("001", "mp3播放器",

32. "效果很不错的mp3播放器,存储空间达1GB", 999.00));

33. products.put("002", new Product("002", "数码相机", "象素500万,10倍光学变焦",

34. 2500.00));

35. products.put("003", new Product("003", "数码摄像机",

36. "120万象素,支持夜景拍摄,20倍光学变焦", 5999.00));

37. products.put("004", new Product("004", "迷你mp4",

38. "市面所能见到的最好的mp4播放器,国产", 1999.99));

39. products.put("005", new Product("005", "多功能手机",

40. "集mp3播放、100万象素数码相机,手机功能于一体", 2199.99));

41. ServletContext context = getServletContext();

42. context.setAttribute("products", products);

43. %>

44. <H1>

45. 产品显示

46. </H1>

47. <a href="/helloApp/shopCart/ShowCartJSP.jsp">查看购物车</a>

48.49. <form name="productForm" action="/helloApp/shopCart/ShoppingJSP.jsp" method="POST">

50. <input type="hidden" name="action" value="purchase">

51. <table border="1" cellspacing="0">

52. <tr bgcolor="#CCCCCC">

53. <tr bgcolor="#CCCCCC">

54. <td>

55. 序号

56. </td>

57. <td>

58. 产品名称

59. </td>

60. <td>

61. 产品描述

62. </td>

63. <td>

64. 产品价格(¥)

65. </td>

66. <td>

67. 添加到购物车

68. </td>

69. </tr>

70. <%

71. Set productIdSet = products.keySet();

72. Iterator it = productIdSet.iterator();

73. int number = 1;

74.

75. while (it.hasNext()) {

76. String id = (String) it.next();

77. Product product = (Product) products.get(id);

78. %><tr>

79. <td>

80. <%=number++ %></td>

81. <td>

82. <%=product.getName()%>

83. </td>

84. <td><%=product.getDescription() %>

85. </td>

86. <td>

87. <%=product.getPrice() %></td>

88. <td>

89. <input type="checkbox" name="productId"

90. value="<%=product.getId() %>">

91. </td>

92. </tr>

93. <% }%>

94. </table>

95. <p>

96. <input type="reset" value="全部取消" />

用jsp实现一个简单的购物车web应用系统。 jsp实现简单聊天室
97. <input type="submit" value="确定" />

98. </p>

99. </form>

100. </body>

101.</html>

102.ShoppingJSP.jsp::::::::::

1.<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

2.<%@ page import="shopcart.dto.*"%>

3.<%

4. String path = request.getContextPath();

5. String basePath = request.getScheme() + "://"

6. + request.getServerName() + ":" + request.getServerPort()

7. + path + "/";

8.%>

9.10.<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

11.<html>

12. <head>

13. <base href="<%=basePath%>">

14.15. <title>My JSP 'shopping.jsp' starting page</title>

16.17. <meta http-equiv="pragma" content="no-cache">

18. <meta http-equiv="cache-control" content="no-cache">

19. <meta http-equiv="expires" content="0">

20. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

21. <meta http-equiv="description" content="This is my page">

22. <!--

23. <link rel="stylesheet" type="text/css" href="styles.css">

24. -->

25.26. </head>

27.28. <body bgcolor="#ffffff">

29. <%

30. try{

31. response.setContentType("text/html; charset=GBK");

32. HttpSession mysession = request.getSession();

33. ServletContext context = getServletContext();

34. ShopCart cart = (ShopCart) mysession.getAttribute("shopCart");

35. String action = request.getParameter("action");

36. if ("remove".equals(action)) {

37. String removeId = request.getParameter("removeId");

38. cart.removeProductFromCart(removeId);

39. } else if(action.equals("purchase")){

40. String[] productIds = request.getParameterValues("productId");

41.42. Map products = (Map) context.getAttribute("products");

43. if (cart == null) {

44. cart = new ShopCart();

45. mysession.setAttribute("shopCart", cart);

46. }

47. if (productIds == null) {

48. productIds = new String[0];

49. }

50. for (int i = 0; i < productIds.length; i++) {

51. Product product = (Product) products.get(productIds[i]);

52. cart.addProductToCart(product);

53. }

54. }

55. }catch(NullPointerException e)

56. {e.printStackTrace();}

57. %>

58. <jsp:forward page="/shopCart/ShowCartJSP.jsp"></jsp:forward>

59.60. </body>

61.</html>

ShopCartJSP.jsp:::::::::

1.<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>

2.<%@ page import="shopcart.dto.*" %>

3.<%

4.String path = request.getContextPath();

5.String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

6.%>

7.8.<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

9.<html>

10. <head>

11. <base href="<%=basePath%>">

12.

13. <title>My JSP 'ShowCartJSP.jsp' starting page</title>

14.

15. <meta http-equiv="pragma" content="no-cache">

16. <meta http-equiv="cache-control" content="no-cache">

17. <meta http-equiv="expires" content="0">

18. <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

19. <meta http-equiv="description" content="This is my page">

20. <!--

21. <link rel="stylesheet" type="text/css" href="styles.css">

22. -->

23.24. </head>

25.

26. <body><%

27. HttpSession mysession = request.getSession();

28. ShopCart cart = (ShopCart) mysession.getAttribute("shopCart");

29. List products = null;

30. if (cart == null

31. || (products = cart.getAllProductsFromCart()) == null) {

32. %>

33.

34. <h1>

35. 你目前没有购买任何产品

36. </h1>

37.

38. <p>

39. <a href="/shopCart/ShowProductsJSP.jsp">返回产品显示页</a>

40. </p>

41. <%

42. } else {

43. Iterator iterator = products.iterator();

44. %>

45.

46. <h1>

47. 你目前购买的产品为:

48. </h1>

49.

50. <table border="1" cellspace="0">

51. <tr bgcolor="#CCCCCC">

52. <td>

53. 产品名称

54. </td>

55. <td>

56. 产品描述

57. </td>

58. <td>

59. 价格

60. </td>

61. <td>

62. 操作

63. </td>

64. </tr>

65. <%

66. while (iterator.hasNext()) {

67. Product productItem = (Product) iterator.next();

68. %>

69. <tr>

70. <td>

71. <%=productItem.getName()%>

72. </td>

73. <td><%=productItem.getDescription()%>

74. </td>

75. <td>

76. <%=productItem.getPrice()%></td>

77.78. <td>

79. <a

80. href="/helloApp/shopCart/ShoppingJSP.jsp?action=remove&removeId=<%=productItem.getId()%>">删除</a>

81. </td>

82. </tr>

83.84. <%

85. }

86. %>

87.88. </table>

89. <p>

90. 目前您购物车的总价格为:<%=cart.getAllProductPrice()%>

91. 元人民币。

92. </p>

93. <p>

94. </br>

95. <a href="/helloApp/shopCart/ShowProductsJSP.jsp">返回产品显示页</a>

96. </p>

97. <%

98. }

99. %>

100. </body>

101.</html>

最后打开Tomcat,在浏览器URL中输入http://localhost:8088/helloApp/shopCart/ShowProductsJSP.jsp

本文来自CSDN博客,转载请标明出处:http://blog.csdn.net/yi76263725/archive/2008/09/14/2860224.aspx

  

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