package com.myjpa;
import java.io.IOException;
import java.io.PrintWriter;
//import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.persistence.*;
import java.util.*;
@SuppressWarnings("serial")
@WebServlet("/HelloWorld")
public class HelloWorldServlet extends HttpServlet {
static String PAGE_HEADER = "<html><head><title>helloworld</title><meta http-equiv='Content-Type' content='text/html;charset=utf8'></head><body>";
static String PAGE_FOOTER = "</body></html>";
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html");
PrintWriter writer = resp.getWriter();
writer.println(PAGE_HEADER);
writer.println("<h1>World</h1>");
writer.println(PAGE_FOOTER);
writer.close();
EntityManagerFactory entityfactory = null;
EntityTransaction t=null;
EntityManager em=null;
try{
entityfactory = Persistence.createEntityManagerFactory("mysql");
em=entityfactory.createEntityManager();
Query query=em.createQuery("from cm_user_group");
List list=query.getResultList();
Iterator iter=list.iterator();
while(iter.hasNext()){
cm_user_group cm_user_group=(cm_user_group) iter.next();
System.out.println(cm_user_group.getgroup_name());
}
t=em.getTransaction();
t.begin();
cm_user_group p=new cm_user_group();
p.setgroup_name("abc");
p.setgroup_category((short)0);
em.persist(p);
t.commit();
}catch(Exception e){
e.printStackTrace();
t.rollback();
}
em.close();
entityfactory.close();
}
}
myjpa20150202.rar （35个子文件） 
myjpa 
.project 2KB .factorypath 514B pom.xml 12KB target test-classes arquillian.xml 2KB META-INF test-persistence.xml 2KB test-ds.xml 2KB m2e-wtp web-resources META-INF maven com.gooomi myjpa pom.xml 12KB pom.properties 220B MANIFEST.MF 107B classes META-INF persistence.xml 728B com myjpa cm_user_group.class 2KB HelloWorldServlet.class 3KB .settings org.eclipse.jpt.core.prefs 131B org.eclipse.wst.common.project.facet.core.prefs.xml 471B .jsdtscope 575B org.eclipse.core.resources.prefs 191B org.eclipse.wst.common.component 656B org.eclipse.wst.validation.prefs 50B org.eclipse.jdt.core.prefs 430B org.eclipse.wst.common.project.facet.core.xml 485B org.eclipse.wst.jsdt.ui.superType.container 49B org.eclipse.m2e.core.prefs 108B org.hibernate.eclipse.console.prefs 85B org.eclipse.wst.jsdt.ui.superType.name 6B src test resources arquillian.xml 2KB META-INF test-persistence.xml 2KB test-ds.xml 2KB java main resources META-INF persistence.xml 728B java com myjpa cm_user_group.java 1KB HelloWorldServlet.java 2KB webapp WEB-INF myjpa-ds.xml 733B faces-config.xml 1KB beans.xml 1KB resources index.jsp 118B .classpath 2KB资源评论
