Lon*_*ent 5 java sql forms servlets jdbc
嗨,大家好我在通过servlet从HTML表单到sql数据库获取输入日期(yyyyMMdd)时遇到问题.表单中的日期作为字符串传递给servlet,但之后我需要将其转换为日期以存储在数据库中.
我已经尝试了许多方法,日期格式化程序等.一种可能的方法是将它转换为long然后格式化它然而这似乎是一个轻微的躲避.
任何想法将不胜感激.
好的,这包括表单和servlet的代码.我把商务对象留了下来.
表格.....
<html>
<head>
<title>Inputing Episode Into Sons Of Anarchy Database</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<h1>Add Sons Of Anarchy Episode to Database</h1>
<form name="sonsOfAnarchyForm" method="get" action="EnterpriseCWEverything\src\coursework\Servlet2.java">
<p>Season Number:
<input name="seasonNumber" type="text" id="seasonNumber">
</p>
<p>Season Episode Number:
<input name="seasonEpisodeNumber" type="text" id="seasonEpisodeNumber">
</p>
<p>Series Episode Number:
<input name="seriesEpisodeNumber" type="text" id="seriesEpisodeNumber">
</p>
<p>Episode Title:
<input name="title" type="text" id="title">
</p>
<p>Written By:
<input name="writtenBy" type="text" id="writtenBy">
</p>
<p>DirectedBy:
<input name="directedBy" type="text" id="directedBy">
</p>
<p>Original Air Date (YYYY-MM-DD):
<input name="origionalAirDate" type="text" id="origionalAirDate">
</p>
<p>Viewing Figures US (Millions):
<input name="viewingFigures" type="text" id="viewingFigures">
</p>
<p>
<input name="addEpisode" type="submit" value="Add Episode">
</p>
</form>
</body>
</html>
Servlet ....(抱歉尝试使用代码samle工具但无论出于何种原因它不喜欢它.)
package coursework;
import javax.servlet.*;
import java.util.Date;
import javax.servlet.http.*;
import java.io.*;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
public class Servlet2 extends HttpServlet
{
public void doGet (HttpServletRequest rq, HttpServletResponse rp) throws ServletException, IOException
{
rp.setContentType("text/html");
PrintWriter out = rp.getWriter();
out.println("<HTML>");
out.println("<HEAD><TITLE> Insert - Test </TITLE></HEAD>");
out.println("<BODY>");
try
{
ArrayList<Episode> episodes;
episodes = new ArrayList<Episode>();
String url = "jdbc:mysql://localhost:3306/sons_of_anarchy";
String driver = "com.mysql.jdbc.Driver";
Class.forName(driver);
Connection connection = DriverManager.getConnection(url,"root","password");
// Convert string to date
//String temp1;
//long temp;
//temp = Long.parseLong(rq.getParameter("origionalAirDate"));
//temp1 = rq.getParameter("origionalAirDate");
//Problem Code................................................
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
Date date = formatter.parse(rq.getParameter("origionalAirDate"));
//SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
//Date date = formatter.format(rq.getParameter("origionalAirDate"));
// Set the new instance of the episode row
Episode temp;
episodes.add(temp = new Episode(Integer.parseInt(rq.getParameter("seasonNumber")), Integer.parseInt(rq.getParameter("seasonEpisodeNumber")), Integer.parseInt(rq.getParameter("seriesEpisodeNumber")), rq.getParameter("title"), rq.getParameter("directedBy"), rq.getParameter("writtenBy"), date , Float.parseFloat(rq.getParameter("viewingFigures"))));
PreparedStatement editStatement = connection.prepareStatement("INSERT into episode_guide");
// Put in database
editStatement.setInt(1, temp.getSeasonNumber());
editStatement.setInt(2, temp.getSeasonEpisodeNumber());
editStatement.setInt(3, temp.getSeriesEpisodeNumber());
editStatement.setString(4, temp.getTitle());
editStatement.setString(5, temp.getDirectedBy());
editStatement.setString(6, temp.getWrittenBy());
editStatement.setDate(7, (java.sql.Date) temp.getOrigionalAirDate());
editStatement.setFloat(8, temp.getViewingFigures());
editStatement.executeUpdate();
editStatement.close();
connection.close();
// Print out new entry
int i = 0;
while(i < episodes.size()){
out.print(episodes.get(i).getSeasonNumber()+
"\t"+ episodes.get(i).getSeasonEpisodeNumber()+
"\t"+ episodes.get(i).getSeriesEpisodeNumber() +
"\t"+ episodes.get(i).getTitle()+
"\t"+ episodes.get(i).getDirectedBy()+
"\t"+ episodes.get(i).getWrittenBy()+
"\t"+ episodes.get(i).getOrigionalAirDate()+
"\t"+ episodes.get(i).getViewingFigures());
out.print("<br>");
i++;
}
}
catch (Exception e)
{
out.println("Error" + e);
}
out.println("<H3> Basic Insert Servlet </H3>");
out.println("Result...");
out.println("</BODY></HTML>");
}
}
抱歉延长运球但在上下文中可能更有意义.
Bal*_*usC 13
要转换String为java.util.Date,请使用SimpleDateFormatGursel的回答.
String string = "2011-03-22";
Date date = new SimpleDateFormat("yyyy-MM-dd").parse(string);
要转换java.util.Date为java.sql.Date,只需使用其构造函数.
preparedStatement.setDate(index, new java.sql.Date(date.getTime()));
由于SimpleDateFormat不返回实例,因此转换不起作用java.sql.Date.
ArrayList<BuisnessObject> episodes;
episodes = new ArrayList<BuisnessObject>();
String url = "jdbc:mysql://localhost:3306/sons_of_anarchy";
String driver = "com.mysql.jdbc.Driver";
Class.forName(driver);
Connection connection = DriverManager.getConnection(url,"root","password");
BuisnessObject newEpisode;
// Takes the date from the form in String and converts it java.util.date which is how the buisness object is written
java.util.Date date = new SimpleDateFormat("yyyy-MM-dd").parse(rq.getParameter("origionalAirDate"));
// Creates an instance of the buisness object
episodes.add(newEpisode = new BuisnessObject(Integer.parseInt(rq.getParameter("seasonNumber")), Integer.parseInt(rq.getParameter("seasonEpisodeNumber")), Integer.parseInt(rq.getParameter("seriesEpisodeNumber")), rq.getParameter("title"), rq.getParameter("directedBy"), rq.getParameter("writtenBy"), date, Float.parseFloat(rq.getParameter("viewingFigures"))));
PreparedStatement editStatement = connection.prepareStatement("INSERT into episode_guide VALUES (null,?,?,?,?,?,?,?,?)");
// Takes date from java.util.date and converts it to java.sql.date
java.sql.Date mySqlDate = new java.sql.Date(newEpisode.origionalAirDate.getTime());
editStatement.setInt(1, newEpisode.getSeasonNumber());
editStatement.setInt(2, newEpisode.getSeasonEpisodeNumber());
editStatement.setInt(3, newEpisode.getSeriesEpisodeNumber());
editStatement.setString(4, newEpisode.getTitle());
editStatement.setString(5, newEpisode.getDirectedBy());
editStatement.setString(6, newEpisode.getWrittenBy());
editStatement.setDate(7, mySqlDate);
editStatement.setFloat(8, (float) newEpisode.getViewingFigures());
editStatement.executeUpdate();
editStatement.close();
connection.close();
几个小时后，它起作用了......谢谢
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