# servlet&JSP 作業
###### tags: `Servlet&JSP`
1.
姓名
電話
性別(男女)
學歷(大學/研究所)
通訊地址
興趣(口運動口閱讀口看電影口其它)
java
```
String title = "作業1";
String name = request.getParameter("name");
String phone = request.getParameter("phone");
String gender = request.getParameter("gender");
String education = request.getParameter("education");
String address = request.getParameter("address");
String[] a = request.getParameterValues("a");
out.println(
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<H1 ALIGN=CENTER>" + title + "</H1>\n" +
"<UL>\n" +
" <LI><B>姓名</B>: "
+ name + "\n" +
" <LI><B>電話</B>: "
+ phone + "\n" +
" <LI><B>性別</B>: "
+ gender + "\n" +
" <LI><B>學歷</B>: "
+ education + "\n" +
" <LI><B>通訊地址</B>: "
+ address + "\n" +
" <LI><B>興趣</B>: ");
try {
for(int i=0 ; i<a.length ; i++){
out.println(a[i]);
}
} catch (Exception e) {
}
out.println(
"</UL>\n" +
"</BODY></HTML>");
}
```
html
```
<H1 ALIGN="CENTER">作業1</H1>
<FORM ACTION="./home1"method="post">
姓名: <INPUT TYPE="TEXT" NAME="name" ><BR>
電話: <INPUT TYPE="TEXT" NAME="phone"><BR>
性別: <select name="gender" size="1" >
<option value="男">男</option>
<option value="女">女</option></select><BR>
學歷: <select name="education" size="1" >
<option value="大學">大學</option>
<option value="研究所">研究所</option></select><BR>
通訊地址: <INPUT TYPE="TEXT" NAME="address"><BR>
<label>興趣:</label>
<label><INPUT TYPE="checkbox" NAME="a" value="運動">運動</label>
<label><INPUT TYPE="checkbox" NAME="a" value="閱讀">閱讀</label>
<label><INPUT TYPE="checkbox" NAME="a" value="看電影">看電影</label>
<label><INPUT TYPE="checkbox" NAME="a" value="其它">其它</label>
<CENTER>
```
2.
設計一個HTML程式讀取使用者帳號與密碼
設計一個servlet程式讀取web.xml檔中的密碼值
比較HTML傳送給servlet程式的帳密，若不符合印出"error"訊息
jsp1
```
<body>
<h1>
<%=request.getServletContext().getInitParameter("ERROR")%>
</h1>
<h1><%=request.getAttribute("name")%></h1>
<h1><%=request.getAttribute("password")%></h1>
<form action='home2.html'>
<input name="button" type="submit" id="button" value="Home"><br>
</form>
```
jsp2
```
<body BGCOLOR="#9F35FF">
<h1>
<%=request.getServletContext().getInitParameter("true")%>
</h1>
<h1><%=request.getAttribute("name")%></h1>
<h1><%=request.getAttribute("password")%></h1>
<form action='home2.html'>
<input name="button" type="submit" id="button" value="Home"><br>
</form>
<H1 ALIGN="CENTER"><img src="C:\Users\Student\Desktop\11.jpg"></H1>>
</body>
```
java取 init
```@WebServlet(
urlPatterns = { "/home2" },
initParams = {
@WebInitParam(name = "user", value = "sa"),
@WebInitParam(name = "password", value = "manager")
})
ServletConfig sc=this.getServletConfig();
String sa =sc.getInitParameter("user");
String manager =sc.getInitParameter("password");
```
補充:java 取xml init
```
ServletConfig sc=this.getServletConfig();
String name1 =sc.getInitParameter("name");
String password1 =sc.getInitParameter("password");
if(name.equals(name1) && password.equals(password1)) //equals要改
```
java equals
```
if(name.equals(sa) && password.equals(manager)) {
request.setAttribute("name", "帳號:"+name);
request.setAttribute("password","密碼:"+password);
request.getRequestDispatcher("/homework2.jsp").forward(request, response);
}else{
request.setAttribute("name", "帳號:"+name);
request.setAttribute("password", "密碼:"+password);
request.getRequestDispatcher("/home2.jsp").forward(request, response);
}
```
html
```
<H1 ALIGN="CENTER">作業2</H1>
<FORM ACTION="./home2"method="post">
帳號: <INPUT TYPE="TEXT" NAME="name" ><BR>
密碼: <INPUT TYPE="password" NAME="password"><BR>
<input type="submit" value="送出"/>
</FORM>
```
xml
```
<servlet>
<servlet-name>home2</servlet-name>
<servlet-class>home2</servlet-class>
<init-param>
<param-name>name</param-name>
<param-value>sa</param-value>
</init-param>
<init-param>
<param-name>password</param-name>
<param-value>manager</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>home2</servlet-name>
<url-pattern>/home2</url-pattern>
</servlet-mapping>
<context-param>
<param-name>ERROR</param-name>
<param-value>密碼錯誤, 請返回感謝!</param-value>
</context-param>
<context-param>
<param-name>true</param-name>
<param-value>恭喜你，密碼正確!</param-value>
</context-param>
```
# 作業三
html->servlet->javaBean->jsp
用第一個作業進階版
建一個新的 classmate
把資料全部塞進去 classmate
用request,response
給jsp
沒有參數的建構子多寫一個
home3page.jsp
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<H1 ALIGN="CENTER">作業3</H1>
<FORM ACTION="./home3"method="post">
姓名: <INPUT TYPE="TEXT" NAME="name" ><BR>
電話: <INPUT TYPE="TEXT" NAME="phone" ><BR>
性別: <select name="gender" size="1" >
<option value="男">男</option>
<option value="女">女</option></select><BR>
學歷: <select name="education" size="1" >
<option value="大學">大學</option>
<option value="研究所">研究所</option></select><BR>
通訊地址: <INPUT TYPE="TEXT" NAME="address"><BR>
<label>興趣:</label>
<label><INPUT TYPE="checkbox" NAME="a" value="運動">運動</label>
<label><INPUT TYPE="checkbox" NAME="a" value="閱讀">閱讀</label>
<label><INPUT TYPE="checkbox" NAME="a" value="看電影">看電影</label>
<label><INPUT TYPE="checkbox" NAME="a" value="其它">其它</label>
<CENTER>
<INPUT TYPE="SUBMIT" name="submit" value="送出">
</CENTER>
</FORM>
</body>
</html>
```
Home3bean.java
```
package home3bean;
public class Home3bean{
String name;
int phone;
String gender;
String education;
String address;
String[] a;
public Home3bean()
{
}
public Home3bean(String pName,int pPhone, String pGender, String pEducation, String pAddress ,String[] pA) {
this.name = pName;
this.phone = pPhone;
this.gender = pGender;
this.education = pEducation;
this.address = pAddress;
this.a = pA;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getPhone() {
return phone;
}
public void setPhone(int phone) {
this.phone = phone;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getEducation() {
return education;
}
public void setEducation(String education) {
this.education = education;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String[] getA() {
return a;
}
public void setA(String[] a) {
this.a = a;
}
}
```
home3.java
```
import home3bean.*;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/home3")
/**
* Servlet implementation class home3
*/
public class home3 extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final String CONTENT_TYPE = "text/html; charset=UTF-8";
private static final String CHARSET_CODE = "UTF-8";
protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{
request.setCharacterEncoding(CHARSET_CODE);
response.setContentType(CONTENT_TYPE);
// response.setHeader("Cache-Control","no-cache");
// response.setHeader("Pragma","no-cache");
// response.setDateHeader ("Expires", -1);
if(request.getParameter("submit")!=null)
gotoSub(request, response);
}
public void gotoSub(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
String name;
int phone;
String gender;
String education;
String address;
String[] a = null;
name = request.getParameter("name").trim();
if(request.getParameter("phone").equals(null)) {
phone = Integer.parseInt(request.getParameter("phone"));
}else {
phone=0;
}
gender = request.getParameter("gender").trim();
education = request.getParameter("education").trim();
address = request.getParameter("address").trim();
a = request.getParameterValues("a");
Home3bean H3b = new Home3bean(name,phone,gender,education,address,a);
request.getSession(true).setAttribute("H3b",H3b);
request.getRequestDispatcher("/home3pagin.jsp").forward(request, response);
}
}
```
home3pagin.jsp
```
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="H3b" class="home3bean.Home3bean" scope="session"/>
<H1 ALIGN="CENTER">作業3</H1>
<FORM ACTION="./home3"method="post">
<% try{%>
姓名: <jsp:getProperty name="H3b" property="name" /><BR>
電話: <jsp:getProperty name="H3b" property="phone" /><BR>
性別: <jsp:getProperty name="H3b" property="gender" /><BR>
學歷: <jsp:getProperty name="H3b" property="education"/> <BR>
通訊地址:<jsp:getProperty name="H3b" property="address"/><BR>
<%
}catch(NumberFormatException e){
}
%>
興趣:
<%try{ %>
<%
for(int i=0 ; i<H3b.getA().length ; i++ ){
%>
<%=H3b.getA()[i] %>
<%
}
%>
<%
}catch(NullPointerException e){
}
%>
</FORM>
</body>
</html>
```
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