J2EE Servlet 学习笔记2
2014-04-11 18:22
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<?xml version="1.0" encoding="gb2312"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<context-param>
<param-name>driverClass</param-name>
<param-value>com.mysql.jdbc.Driver</param-value>
</context-param>
<context-param>
<param-name>url</param-name>
<param-value>jdbc:mysql://10.33.52.12:3306/bookstore</param-value>
</context-param>
<context-param>
<param-name>user</param-name>
<param-value>intelFC</param-value>
</context-param>
<context-param>
<param-name>password</param-name>
<param-value>qHcqSLnH4T3T9PRj</param-value>
</context-param>
<servlet>
<servlet-name>CreateDBServlet</servlet-name>
<servlet-class>org.laotou99.abc3.servlet.CreateDBServlet</servlet-class>
<init-param>
<param-name>driverClass</param-name>
<param-value>com.mysql.jdbc.Driver</param-value>
</init-param>
<init-param>
<param-name>url</param-name>
<param-value>jdbc:mysql://10.33.52.12:3306</param-value>
</init-param>
<init-param>
<param-name>user</param-name>
<param-value>intelFC</param-value>
</init-param>
<init-param>
<param-name>password</param-name>
<param-value>qHcqSLnH4T3T9PRj</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>CreateDBServlet</servlet-name>
<url-pattern>/createdb</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>ListServlet</servlet-name>
<servlet-class>org.laotou99.abc3.servlet.ListServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ListServlet</servlet-name>
<url-pattern>/list</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>CreateAccountServlet</servlet-name>
<servlet-class>org.laotou99.abc3.servlet.CreateAccountServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>CreateAccountServlet</servlet-name>
<url-pattern>/account</url-pattern>
</servlet-mapping>
</web-app><html>
<head>
<title>网上书店</title>
<script language="javaScript">
<!--
function fsubmit()
{
if(searchForm.rcond[0].checked)
{
searchForm.action="list?cond=all"
}
else if(searchForm.rcond[1].checked)
{
searchForm.action="list?cond=precision"
}
else
{
searchForm.action="list?cond=keyword"
}
}
function hideall()
{
if(searchForm.rcond[0].checked)
{
pre.style.display = "none";
key.style.display = "none";
}
}
function showpre()
{
if(searchForm.rcond[1].checked)
{
pre.style.display = "";
key.style.display = "none";
}
else
{
pre.style.display = "none";
}
}
function showkey()
{
if(searchForm.rcond[2].checked)
{
key.style.display = "";
pre.style.display = "none";
}
else
{
key.style.display = "none";
}
}
-->
</script>
</head>
<body>
<form name="searchForm" action="" method="post" onClick="fsubmit()">
<input type="radio" name="rcond" onclick="hideall()">
查看所有图书<p>
<input type="radio" name="rcond" onclick="showpre()">
精准搜索<p>
<table id=pre style="DISPLAY: none">
<tr>
<td>书名：</td>
<td><input type="text" name="title"></td>
</tr>
<tr>
<td>作者：</td>
<td><input type="text" name="author"></td>
</tr>
<tr>
<td>出版社：</td>
<td><input type="text" name="bookconcern"></td>
</tr>
</table><p>
<input type="radio" name="rcond" onclick="showkey()">
关键字搜索<p>
<table id=key style="DISPLAY: none">
<tr>
<td>请输入关键字：</td>
<td><input type="text" name="keyword"></td>
</tr>
</table><p>
<input type="reset" value="重置">
<input type="submit" value="搜索">
</form>
</body>
</html>package org.laotou99.abc3.servlet;
import javax.servlet.*;
import java.io.*;
import javax.servlet.http.*;
import java.sql.*;
//javac -d ..\WEB-INF\classes ListServlet.java
public class ListServlet extends HttpServlet
{
private String url;
private String user;
private String password;
public void init() throws ServletException
{
ServletContext sc = getServletContext();
String driverClass = sc.getInitParameter("driverClass");
url = sc.getInitParameter("url");
user = sc.getInitParameter("user");
password = sc.getInitParameter("password");
try{
Class.forName(driverClass);
}catch(ClassNotFoundException ce){
throw new ServletException("加载数据库驱动失败");
}
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
Connection conn = null;
Statement stmt = null;
ResultSet rs=null;
req.setCharacterEncoding("gb2312");
String condition=req.getParameter("cond");
if(null==condition || condition.equals(""))
{
resp.sendRedirect("search.html");
return;
}
resp.setContentType("text/html;charset=gb2312");
PrintWriter out = resp.getWriter();
try{
conn=DriverManager.getConnection(url,user,password);
stmt=conn.createStatement();
if(condition.equals("all"))
{
rs=stmt.executeQuery("select * from bookinfo");
printBookInfo(out,rs);
out.close();
}
else if(condition.equals("precision"))
{
String title = req.getParameter("title");
String author = req.getParameter("author");
String bookconcern = req.getParameter("bookconcern");
if((null==title || title.equals("")) &&
(null==author || title.equals("")) &&
(null==bookconcern || title.equals("")))
{
resp.sendRedirect("search.html");
return;
}
StringBuffer sb = new StringBuffer("select * from bookinfo where ");
boolean bFlag = false;
if(!title.equals(""))
{
sb.append("title = "+"'"+title+"'");
bFlag=true;
}
if(!author.equals(""))
{
if(bFlag)
sb.append("and author = "+"'"+author+"'");
else
{
sb.append("author = "+"'"+author+"'");
bFlag=true;
}
}
if(!bookconcern.equals(""))
{
if(bFlag)
sb.append("and bookconcern = "+"'"+bookconcern+"'");
else
{
sb.append("bookconcern = "+"'"+bookconcern+"'");
}
}
rs = stmt.executeQuery(sb.toString());
printBookInfo(out,rs);
out.close();
}
else if(condition.equals("keyword"))
{
String keyword = req.getParameter("keyword");
if(null==keyword || keyword.equals(""))
{
resp.sendRedirect("search.html");
return;
}
String strSQL = "select * from bookinfo where title like'%"+keyword+"%'";
rs = stmt.executeQuery(strSQL);
printBookInfo(out,rs);
out.close();
}
else
{
resp.sendRedirect("search.html");
return;
}
}catch(SQLException se){
se.printStackTrace();
}
finally
{
if(rs!=null){
try
{
rs.close();
}
catch(SQLException se)
{
se.printStackTrace();
}
rs=null;
}
if(stmt!=null)
{
try
{
stmt.close();
}
catch(SQLException se)
{
se.printStackTrace();
}
stmt=null;
}
if(conn!=null)
{
try
{
conn.close();
}
catch(SQLException se)
{
se.printStackTrace();
}
conn=null;
}
}
}
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
doGet(req,resp);
}
private void printBookInfo(PrintWriter out,ResultSet rs)
{
out.println("<html><head>");
out.println("<title>图书信息</title>");
out.println("</head><body>");
out.println("<table border=1><caption>图书信息</caption>");
out.println("<tr><th>书名</th><th>作者</th><th>出版社</th><th>价格</th><th>发行日期</th></tr>");
try{
while(rs.next())
{
out.println("<tr>");
out.println("<td>"+rs.getString("title")+"</td>");
out.println("<td>"+rs.getString("author")+"</td>");
out.println("<td>"+rs.getString("bookconcern")+"</td>");
out.println("<td>"+rs.getFloat("price")+"</td>");
out.println("<td>"+rs.getDate("publish_date")+"</td>");
out.println("</tr>");
}
}catch(SQLException se){
se.printStackTrace();
}finally
{
if(rs!=null){
try
{
rs.close();
}
catch(SQLException se)
{
se.printStackTrace();
}
rs=null;
}
}
out.println("</table></body></html>");
out.println("");
}
}package org.laotou99.abc3.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
//import com.mysql.jdbc.Driver;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//javac -d ..\WEB-INF\classes CreateDBServlet.java
public class CreateDBServlet extends HttpServlet
{
private String url;
private String user;
private String password;
public void init() throws ServletException
{
String driverClass = getInitParameter("driverClass");
url=getInitParameter("url");
user=getInitParameter("user");
password=getInitParameter("password");
try{
Class.forName(driverClass);
}catch(ClassNotFoundException ce){
throw new ServletException("加载数据库驱动失败");
}
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
Connection conn = null;
Statement stmt = null;
try{
conn=DriverManager.getConnection(url,user,password);
stmt=conn.createStatement();
stmt.executeUpdate("drop database if exists bookstore");
stmt.executeUpdate("create database bookstore DEFAULT CHARACTER SET gb2312 COLLATE gb2312_bin");
stmt.executeUpdate("use bookstore");
stmt.executeUpdate("create table bookinfo("+
"id INT not null primary key, "+
"title VARCHAR(50) CHARACTER SET gb2312 COLLATE gb2312_bin not null, "+
"author VARCHAR(50) not null, "+
"bookconcern VARCHAR(100) not null, "+
"publish_date DATE not null, "+
"price FLOAT(4,2) not null, "+
"amount SMALLINT, "+
"remark VARCHAR(200))"+
"ENGINE=InnoDB CHARACTER SET gb2312 COLLATE gb2312_bin");
stmt.addBatch("insert into bookinfo values("+
"2,"+
"'Java WEB KKKK',"+
"'abc',"+
"'bbb',"+
"'2014-04-11',"+
"99.00,"+
"35,"+
"null)");
stmt.addBatch("insert into bookinfo values("+
"3,"+
"'Struts 2 KKKK ',"+
"'abc',"+
"'bbb',"+
"'2014-04-11',"+
"79.00,"+
"33,"+
"null)");
stmt.addBatch("insert into bookinfo values("+
"1,"+
"'ServletJsp KKKK ',"+
"'abc',"+
"'bbb',"+
"'2014-04-11',"+
"88.00,"+
"10,"+
"null)");
stmt.executeBatch();
resp.setContentType("text/html;charset=GBK");
PrintWriter out = resp.getWriter();
out.println("数据库创建成功");
out.close();
}catch(SQLException se){
throw new ServletException(se);
}finally{
if(stmt!=null){
try{
stmt.close();
}catch(SQLException se){
se.printStackTrace();
}
stmt=null;
}
if(conn!=null){
try{
conn.close();
}catch(SQLException se){
se.printStackTrace();
}
conn=null;
}
}
}
}package org.laotou99.abc3.servlet;
import javax.servlet.*;
import java.io.*;
import javax.servlet.http.*;
import java.sql.*;
//javac -d ..\WEB-INF\classes CreateAccountServlet.java
public class CreateAccountServlet extends HttpServlet
{
private String url;
private String user;
private String password;
public void init() throws ServletException
{
ServletContext sc = getServletContext();
String driverClass = sc.getInitParameter("driverClass");
url = sc.getInitParameter("url");
user = sc.getInitParameter("user");
password = sc.getInitParameter("password");
try{
Class.forName(driverClass);
}catch(ClassNotFoundException ce){
throw new ServletException("加载数据库驱动失败");
}
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
Connection conn = null;
Statement stmt = null;
PreparedStatement pstmt = null;
try{
conn = DriverManager.getConnection(url,user,password);
stmt=conn.createStatement();
stmt.executeUpdate("create table account("+
"userid VARCHAR(10) CHARACTER SET gb2312 COLLATE gb2312_bin not null primary key, "+
"balance FLOAT(6,2))"+
"ENGINE = InnoDB CHARACTER SET gb2312 COLLATE gb2312_bin");
pstmt=conn.prepareStatement("insert into account values(?,?)");
pstmt.setString(1,"Jia");
pstmt.setFloat(2,2000.00f);
pstmt.executeUpdate();
pstmt.setString(1,"Yi");
pstmt.setFloat(2,500.00f);
pstmt.executeUpdate();
resp.setContentType("text/html;charset=GBK");
PrintWriter out = resp.getWriter();
out.println("创建account表成功");
out.close();
}catch(SQLException se){
se.printStackTrace();
}finally{
if(stmt!=null){
try{
stmt.close();
}catch(SQLException se){
se.printStackTrace();
}
stmt=null;
}
if(pstmt!=null){
try{
pstmt.close();
}catch(SQLException se){
se.printStackTrace();
}
pstmt=null;
}
if(conn!=null){
try{
conn.close();
}catch(SQLException se){
se.printStackTrace();
}
conn=null;
}
}
}
}
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