struts初学者的苦恼

web.xml:<?xml version="1.0" encoding="ISO-8859-1"?><!DOCTYPE web-app
  PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
  "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>  
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>application</param-name>
      <param-value>com.evertech.test.ApplicationResources</param-value>

    </init-param>
     <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>validate</param-name>
      <param-value>true</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>  
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>  
  <taglib>
    <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
  </taglib>  <taglib>
    <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
  </taglib>  <taglib>
    <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
  </taglib></web-app>
struts-config.xml:<?xml version="1.0" encoding="ISO-8859-1" ?><!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>   <form-beans>
    <form-bean      name="userinfoForm"
                    type="com.evertech.test.UserinfoForm"/>
  </form-beans>  <action-mappings>
    <action    path="/adduser"
               type="com.evertech.test.AddUserAction"
          attribute="userinfoForm"
              scope="request"
              input="/userinfo.jsp"
           validate="true">      <forward name="success"              path="/userinfo.jsp"/>
    </action>
  </action-mappings>
  <message-resources
    parameter="com.evertech.test.ApplicationResources"/>
</struts-config>ApplicationResources.properties:userinfo.title=userinfo listerror.username.required=<li>Username is required</li>
error.password.required=<li>Password is required</li>error.db.add = database error!!!!!!!!!!########=============END==========userinfo.jsp<%@ page language = "java" %><%@ taglib uri = "WEB-INF/struts-bean.tld" prefix = "bean" %>
<%@ taglib uri = "WEB-INF/struts-html.tld" prefix = "html" %>
<%@ taglib uri = "WEB-INF/struts-logic.tld" prefix = "logic" %><html:html locale = "true">
<head>
<html:base/>
<title><bean:message key="userinfo.title"/></title>
</head><body background = "white">
<h3>user information</h3>
<table width="400" border="0" align="center">
<html:form action = "adduser.do" focus ="username" method = "GET">    <html:text property = "username" maxlength = "16"/>
    <html:text property = "password" maxlength = "10"/>    <html:submit property = "add"/></html:form>
</table></body>
</html:html>下面还有

UserinfoForm.java
package com.evertech.test;import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;public final class UserinfoForm extends ActionForm
{    private String username;
    private String password;

    public void setusername(String username)
    {
        this.username = username;
    }    public String getusername()
    {
        return this.username;
    }    public void setpassword(String password)
    {
        this.password = password;
    }    public String getpassword()
    {
        return this.password;
    }    public void reset(ActionMapping actionmapping, HttpServletRequest httpservletrequest)
    {
        this.username = null;
        this.password = null;
    }    public ActionErrors validate(ActionMapping actionmapping, HttpServletRequest httpservletrequest)
    {
        ActionErrors actionerrors = new ActionErrors();
        if(username == null || username.length() < 1)
            actionerrors.add("username", new ActionError("error.username.required"));
        if(password == null || password.length() < 1)
            actionerrors.add("password", new ActionError("error.password.required"));
        return actionerrors;
    }}
AddUserAction.java:package com.evertech.test;import java.sql.*;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.*;
import org.apache.struts.config.ActionConfig;public class AddUserAction extends Action
{    public static EverLog log = EverLog.getInstance(com.evertech.test.AddUserAction.class);    public ActionForward execute(ActionMapping actionmapping,
                                ActionForm actionform,
                                HttpServletRequest request,
                                HttpServletResponse response)
    {
        org.apache.struts.util.MessageResources messageresources = getResources(request);
        ActionErrors errors = new ActionErrors();
        Connection connection;
        PreparedStatement preparedstatement;        String username = request.getParameter("username");
        String password = request.getParameter("password");
        try
        {
            Database database = new Database(); //自定义的一个连接数据库的类
            connection = database.getConn();    //取得一个连结
            String sql = "insert into userinfo( username,password ) values(?,?)";
            preparedstatement = connection.prepareStatement(sql);
            preparedstatement.setString(1, username);
            preparedstatement.setString(2, password);
            preparedstatement.executeUpdate();
        }
        catch(SQLException sqlexception)
        {
            log.debug("SQL execute Error:" + sqlexception);
            errors.add("databaseerror", new ActionError("error.db.add"));
            connection = null;
            preparedstatement = null;        }
        finally
        {
            connection = null;
            preparedstatement = null;
        }
        return actionmapping.findForward("success");
    }}Database.java:
package com.evertech.test;import java.sql.Connection;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;public class Database
{ public static EverLog log = EverLog.getInstance(com.evertech.test.Database.class);
     public Connection getConn()
    {
        Connection connection;
        try
        {
            InitialContext initialcontext = new InitialContext();
            if(initialcontext == null)
                throw new Exception("No Context");
            Context context = (Context)initialcontext.lookup("java:/comp/env");
            DataSource datasource = (DataSource)context.lookup("jdbc/myoracle");
            connection = datasource.getConnection();
        }
        catch(Exception exception)
        {
            log.debug("database connetion exception:" + exception);
            connection = null;
        }
        return connection;
    }}createtable.sql:create table userinfo(
              username varchar2(20) primary key,
              password varchar2(10) not null
           )全都贴出来了,盼解决，谢谢

取数据不时这样取的request.getParameter时这样的  public ActionForward perform(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
   {
    NewForm newForm = (NewForm)form;
.......

<action    path="/adduser"
               type="com.evertech.test.AddUserAction"
          attribute="userinfoForm"
              scope="request"
              input="/userinfo.jsp"
           validate="true">      <forward name="success"              path="/userinfo.jsp"/>
    </action>
中attribute="userinfoForm"应该是name="userinfoForm"
name才是用来指定form-bean的

忘了说,attribute属性在name属性没有指定的情况下是不被允许的
这个你可以看看strust-config.dtd里面的注释写得很明白还有request.getParameter这种方式也可以取到数据，并没有影响

调试易

struts初学者的苦恼

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