我想从mysql中检索数据并在mysql中插入数据。
我提供3个文件一个java文件和两个jsp文件edit.jsp和view.jsp来分别编辑和查看数据。
我使用ServiceBuilder创建了表格，我已将portal-ext.properties放在classes文件夹中，告诉我这是完美的方法吗？我这样做的方法是否正确？
我想首先插入数据，然后我想从数据库中检索数据。
我通过以下jsp文件插入数据 - edit.jsp
<%@ taglib uri="http://java.sun.com/portlet" prefix="portlet" %>
<jsp:useBean class="java.lang.String" id="addNameURL" scope="request" />
<jsp:useBean class="java.lang.String" id="area" scope="request"/>
<jsp:useBean class="java.lang.String" id="email" scope="request"/>
<jsp:useBean class="java.lang.String" id="subject" scope="request"/>
<jsp:useBean class="java.lang.String" id="compnay" scope="request"/>
<jsp:useBean class="java.lang.String" id="designation" scope="request"/>
<portlet:defineObjects />
<form id="<portlet:namespace />helloForm" action="<%= addNameURL %>"method="post">
<table>
<tr>
<td>Subject:</td>
<td><input type="text" name="subject"></td>
</tr>
<tr>
<td>
Write Your Testimonial
</td>
<td><textarea name ="area"></textarea>
</td>
</tr>
<tr>
<td>Name:</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>Email:</td>
<td><input type="text" name="email"></td>
</tr>
<tr>
<td>Company:</td>
<td><input type="text" name="company"></td>
</tr>
<tr>
<td>Designation:</td>
<td><input type="text" name="designation"></td>
</tr>
</table>
<input type="submit" id="nameButton" title="Submit" value="Submit">
</form>
我在以下java文件中编写了插入逻辑 - Testimonial1：
package com.liferay.portlet;
import java.io.IOException;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.GenericPortlet;
import javax.portlet.PortletException;
import javax.portlet.PortletMode;
import javax.portlet.PortletPreferences;
import javax.portlet.PortletRequestDispatcher;
import javax.portlet.PortletURL;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.liferay.counter.service.CounterLocalServiceUtil;
import com.liferay.portal.kernel.exception.SystemException;
import com.liferay.portlet.model.testimonial;
import com.liferay.portlet.service.testimonialLocalServiceUtil;
public class Testimonial1 extends GenericPortlet {
public void init()throws PortletException
{
editJSP = getInitParameter("edit-jsp");
viewJSP = getInitParameter("view-jsp");
}
public void doEdit(RenderRequest renderRequest,RenderResponse renderResponse)
throws IOException, PortletException
{
renderResponse.setContentType("text/html");
PortletURL addNameURL = renderResponse.createActionURL();
addNameURL.setParameter("addName", "addName");
renderRequest.setAttribute("addNameURL", addNameURL.toString());
include(editJSP, renderRequest, renderResponse);
}
public void doView(RenderRequest renderRequest,RenderResponse renderResponse)throws
IOException, PortletException
{
PortletPreferences prefs = renderRequest.getPreferences();
String username = (String) prefs.getValue("name", "");
String area=(String)prefs.getValue("area", "testimonial");
String email=(String)prefs.getValue("email", "");
String subject=(String)prefs.getValue("subject", "");
String company=(String)prefs.getValue("company", "");
String designation=(String)prefs.getValue("designation", "");
if (username.equalsIgnoreCase (""))
{
username = "";
}
renderRequest.setAttribute("userName", username);
renderRequest.setAttribute("area",area);
renderRequest.setAttribute("email",email);
renderRequest.setAttribute("subject",subject);
renderRequest.setAttribute("designation",designation);
renderRequest.setAttribute("company",company);
include(viewJSP, renderRequest, renderResponse);
}
public void processAction(ActionRequest actionRequest, ActionResponse actionResponse)
throws IOException, PortletException
{
String addName = actionRequest.getParameter("addName");
if (addName != null)
{
PortletPreferences prefs = actionRequest.getPreferences();
prefs.setValue("name", actionRequest.getParameter("username"));
prefs.setValue("area",actionRequest.getParameter("area"));
prefs.setValue("email",actionRequest.getParameter("email"));
prefs.setValue("subject",actionRequest.getParameter("subject"));
prefs.setValue("designation",actionRequest.getParameter("designation"));
prefs.setValue("company",actionRequest.getParameter("company"));
prefs.store();
testimonial testimonial = null;
try {
testimonialLocalServiceUtil.createtestimonial(CounterLocalServiceUtil.increment());
testimonial.setSubject(actionRequest.getParameter("subject"));
testimonial.setArea(actionRequest.getParameter("area"));
testimonial.setUsername(actionRequest.getParameter("username"));
testimonial.setEmail(actionRequest.getParameter("email"));
testimonial.setCompany(actionRequest.getParameter("company"));
testimonial.setDesignation(actionRequest.getParameter("designation"));
testimonialLocalServiceUtil.addtestimonial(testimonial);
} catch (SystemException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
actionResponse.setPortletMode(PortletMode.VIEW);
}
}
protected void include(String path, RenderRequest renderRequest, RenderResponse renderResponse)
throws IOException, PortletException
{
PortletRequestDispatcher portletRequestDispatcher = getPortletContext().getRequestDispatcher(path);
if (portletRequestDispatcher == null)
{
_log.error(path + " is not a valid include");
}
else
{
portletRequestDispatcher.include(renderRequest, renderResponse);
}
}
protected String editJSP;
protected String viewJSP;
private static Log _log = LogFactory.getLog(Testimonial1.class);
}
我已将视图逻辑写入以下文件 - view.jsp，我想从以下文件中检索数据库中的数据：
<%@ taglib uri="http://java.sun.com/portlet" prefix="portlet" %>
<jsp:useBean id="subject" class="java.lang.String" scope="request"/>
<jsp:useBean id="area" class="java.lang.String" scope="request"/>
<jsp:useBean id="userName" class="java.lang.String" scope="request" />
<jsp:useBean id="email" class="java.lang.String" scope="request"/>
<jsp:useBean id="company" class="java.lang.String" scope="request"/>
<jsp:useBean id="designation" class="java.lang.String" scope="request"/>
<portlet:defineObjects />
<p>This is the Testimonial portlet......... how are u all ..........</p>
<p>Subject is ....<%=subject %></p>
<p>Testimonial is .....<%=area %></p>
<p>Hello <%= userName %>!</p>
<p>your Email ......<%=email %></p>
<p>your company .....<%=company %></p>
<p>You are .......<%=designation %></p>
我的service.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE service-builder PUBLIC "-//Liferay//DTD Service Builder 6.1.0//EN" "http://www.liferay.com/dtd/liferay-service-builder_6_1_0.dtd">
<service-builder package-path="com.liferay.portlet">
<author>ubuntu</author>
<namespace>perception</namespace>
<entity name="testimonial" local-service="true" remote-service="true">
<column name="subject" type="String"></column>
<column name="area" type="String"></column>
<column name="username" type="String"></column>
<column name="email" type="String"></column>
<column name="company" type="String"></column>
<column name="designation" type="String"></column>
</entity>
</service-builder>
我的portal-ext.properties文件：
#
# MySQL
#
jdbc.default.driverClassName=com.mysql.jdbc.Driver
jdbc.default.url=jdbc:mysql://localhost/lportal?useUnicode=true&characterEn
coding=UTF-8&useFastDateParsing=false
jdbc.default.username=root
jdbc.default.password=ubuntu123
schema.run.enabled=true
schema.run.minimal=true
我已经放了所有文件，现在请告诉我我要做的数据插入和检索。
请告诉我在插入代码中是否正确？以及如何从数据库中检索数据？
答案 0 :(得分：1)
您可以查看liferay的服务构建器。
http://www.liferay.com/community/wiki/-/wiki/Main/Service+Builder
http://www.liferay.com/documentation/liferay-portal/6.0/development/-/ai/service-build-2
如果您的数据与liferay不在同一个数据库中，您仍然可以使用服务构建器
答案 1 :(得分：1)
这是一个评论，但对于那种格式来说太长了 - 因此我将其添加为答案。
据我所知，您的代码存在一个主要缺陷，与底层问题无关：您正在使用portlet VIEW模式显示数据，使用EDIT模式来操作它。这是对JSR-286的常见误解，我学会了讨厌这个命名。
EDIT用于配置当前的portlet - 当EDIT操作的结果是单个数据库记录的更改时，您几乎总是使用错误的portlet模式。您必须使用VIEW模式（这只是portlet模式，与您的应用程序，读取或写入数据无关）。考虑到默认情况下EDIT模式只能由管理员访问，通常用于更改PortletPreferences，很少用于数据库内容（这是一种简化，但这是一个很好的经验法则）
出于这个原因，Liferay在UI上命名编辑模式“首选项”，您通常通过portlet的上下文菜单（“首选项”，sic！）导航到它。