联动详解编程语言

 public class DynamicList extends HttpServlet { 
 
private ArrayList students = new ArrayList(); 
 
 // 定义Student内部类 
 
public static class Student { 
 
private int id; 
 
 private String name; 
 
private int age; 
 
 private String gender; 
 
private String date; 
 
public Student(int id, String name, int age, String gender, String date) { 
 
 super(); this.id = id; this.name = name; this.age = age; this.gender = gender; this.date = date; 
 
} } 
 
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
 
 // 设置生成文件的类型和编码格式 
 
response.setContentType("text/xml;charset=UTF-8"); // 设置响应内容格式 
 
 response.setHeader("Cache-Control", "no-cache"); 
 
PrintWriter out = response.getWriter(); 
 
String output = ""; // 处理接收到的参数 
 
 int age = 0; 
 
 if (request.getParameter("age") != null) { // 如果age属性不为空 
 
age = Integer.parseInt(request.getParameter("age")); // 得到age的值 
 
} 
 
ArrayList studentList = new ArrayList();// 创建student集合对象 
 
 if (age == 0) studentList = students; else studentList = getStudents(age); 
 
// 生成响应文档 
 
 if (!studentList.isEmpty()) { 
 
 output += ""; for (int i = 0; i < studentList.size(); i++) { // 遍历对象集合 
 
Student stu = studentList.get(i); // 取得对象 
 
 output += ""; 
 
output += "" + stu.id + ""; 
 
output += "" + stu.name + ""; 
 
output += ""; 
 
} 
 
output += ""; 
 
 } 
 
out.print(output); // 向客户端传递信息 
 
out.close(); 
 
} 
 
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
 
 this.doGet(request, response); } // 初始化数据集合 
 
 public void init() throws ServletException { 
 
 students.add(new Student(1, "Marlin", 22, "Gril", "2007-8-5")); 
 
 students.add(new Student(2, "Tom", 22, "Boy", "2007-8-7")); 
 
 students.add(new Student(3, "Jack", 22, "Boy", "2007-8-3")); 
 
students.add(new Student(4, "Mac", 23, "Boy", "2007-8-7")); 
 
students.add(new Student(5, "Mercy", 23, "Girl", "2007-8-9")); 
 
students.add(new Student(6, "Rain", 23, "Boy", "2007-8-10")); 
 
 students.add(new Student(7, "Luice", 24, "Girl", "2007-8-10")); 
 
students.add(new Student(8, "Jonse", 24, "Boy", "2007-8-11")); 
 
 students.add(new Student(9, "Lily", 24, "Girl", "2007-8-12")); 
 
} 
 
 // 选出所有满足条件的学生 
 
public ArrayList getStudents(int age) { 
 
ArrayList result = new ArrayList(); // 创建student对象集合 
 
 if (!students.isEmpty()) { // 如果集合对象不为空 
 
 for (int i = 0; i < students.size(); i++) { // 遍历对象集合 
 
Student student = students.get(i); // 取得对象 
 
 if (student.age == age) { 
 
result.add(student); 
 
} } } 
 
return result; 
 
} }