JPA PostgreSQL

時間 2019-11-12

標籤 jpa postgresql 欄目 Java 简体版

原文原文鏈接

1. create new project -> java EE -> enterprice project application (i choose java 5) html

2. check DB connection java

3. create new Entity Class app

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Employee implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private int salary;   ...... jsp

4. add new Entity classes From Database, choose the Employee class and add this

5.create a new servlet called servlet, add like this .net

-------------------- code

public class servlet extends HttpServlet {
    @EJB
    private EmployeeFacadeLocal employeeFacade;


    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        Employee employee = new Employee();
        employee.setName(request.getParameter("name"));
        employee.setSalary(Integer.parseInt(request.getParameter("salary")));
        employeeFacade.create(employee);

        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet servlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet servlet " + request.getParameter("name") + " is created </h1>");

------------ orm

6.create a jsf/jsp page form name:/servlet, create a table, tbody inputext name called name, inputtext name called salary htm

7.run get

相關標籤/搜索

postgresql

jpa

apache+postgresql

jdbctemplate+postgresql

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