front-end
13주차 실습
lvher
2020. 11. 22. 19:01
1.mvn project를 하나 만듭니다.
2.pom.xml에 dependency를 추가합니다.
3.Emp.java를 생성합니다.
package com.spring.bean;
public class Emp {
private int id;
private String name;
private float salary;
private String designation;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public float getSalary() {
return salary;
}
public void setSalary(float salary) {
this.salary = salary;
}
public String getDesignation() {
return designation;
}
public void setDesignation(String designation) {
this.designation = designation;
}
}4.EmpDao.java를 생성합니다.
package com.spring.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import com.spring.bean.Emp;
public class EmpDao {
JdbcTemplate template;
public void setTemplate(JdbcTemplate template) {
this.template = template;
}
public int save(Emp p) {
String sql = "insert into Emp99(name,salary,designation) values('" + p.getName() + "'," + p.getSalary() + ",'"
+ p.getDesignation() + "')";
return template.update(sql);
}
public int update(Emp p) {
String sql = "update Emp99 set name='" + p.getName() + "', salary=" + p.getSalary() + ",designation='"
+ p.getDesignation() + "' where id=" + p.getId() + "";
return template.update(sql);
}
public int delete(int id) {
String sql = "delete from Emp99 where id=" + id + "";
return template.update(sql);
}
public Emp getEmpById(int id) {
String sql = "select * from Emp99 where id=?";
return template.queryForObject(sql, new Object[] { id }, new BeanPropertyRowMapper<Emp>(Emp.class));
}
public List<Emp> getEmployees() {
return template.query("select * from Emp99", new RowMapper<Emp>() {
public Emp mapRow(ResultSet rs, int row) throws SQLException {
Emp e = new Emp();
e.setId(rs.getInt(1));
e.setName(rs.getString(2));
e.setSalary(rs.getFloat(3));
e.setDesignation(rs.getString(4));
return e;
}
});
}
}4.servlet-content 내용을 수정합니다.
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans
xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing
infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving
up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources
in the /WEB-INF/views directory -->
<beans:bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan
base-package="com.spring.crudproj" />
<beans:bean id="ds" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<beans:property name="driverClassName"
value="com.mysql.jdbc.Driver"></beans:property>
<beans:property name="url"
value="jdbc:mysql://db4free.net:3306/lvher1"></beans:property>
<beans:property name="username" value="lvher1"></beans:property>
<beans:property name="password" value="imgmin8689"></beans:property>
</beans:bean>
<beans:bean id="jt"
class="org.springframework.jdbc.core.JdbcTemplate">
<beans:property name="dataSource" ref="ds"></beans:property>
</beans:bean>
<beans:bean id="dao" class="com.spring.dao.EmpDao">
<beans:property name="template" ref="jt"></beans:property>
</beans:bean>
</beans:beans>
5.Empcontroller.java파일을 생성합니다.
package com.spring.crud.controllers;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.spring.bean.Emp;
import com.spring.dao.EmpDao;
@Controller
public class EmpController {
@Autowired
EmpDao dao;//will inject dao from XML file
/*It displays a form to input data, here "command" is a reserved request attribute
*which is used to display object data into form
*/
@RequestMapping("/empform")
public String showform(Model m){
m.addAttribute("command", new Emp());
return "empform";
}
/*It saves object into database. The @ModelAttribute puts request data
* into model object. You need to mention RequestMethod.POST method
* because default request is GET*/
@RequestMapping(value="/save",method = RequestMethod.POST)
public String save(@ModelAttribute("emp") Emp emp){
dao.save(emp);
return "redirect:/viewemp";//will redirect to viewemp request mapping
}
/* It provides list of employees in model object */
@RequestMapping("/viewemp")
public String viewemp(Model m){
List<Emp> list=dao.getEmployees();
m.addAttribute("list",list);
return "viewemp";
}
/* It displays object data into form for the given id.
* The @PathVariable puts URL data into variable.*/
@RequestMapping(value="/editemp/{id}")
public String edit(@PathVariable int id, Model m){
Emp emp=dao.getEmpById(id);
m.addAttribute("command",emp);
return "empeditform";
}
/* It updates model object. */
@RequestMapping(value="/editsave",method = RequestMethod.POST)
public String editsave(@ModelAttribute("emp") Emp emp){
dao.update(emp);
return "redirect:/viewemp";
}
/* It deletes record for the given id in URL and redirects to /viewemp */
@RequestMapping(value="/deleteemp/{id}",method = RequestMethod.GET)
public String delete(@PathVariable int id){
dao.delete(id);
return "redirect:/viewemp";
}
}
6~jsp 파일들을 만듭니다.
empeditform.jsp
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<h1>Edit Employee</h1>
<form:form method="POST" action="/SpringMVCCRUDProject/editsave">
<table>
<tr>
<td></td>
<td><form:hidden path="id" /></td>
</tr>
<tr>
<td>Name :</td>
<td><form:input path="name" /></td>
</tr>
<tr>
<td>Salary :</td>
<td><form:input path="salary" /></td>
</tr>
<tr>
<td>Designation :</td>
<td><form:input path="designation" /></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Edit Save" /></td>
</tr>
</table>
</form:form>
empform.jsp
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<h1>Add New Employee</h1>
<form:form method="post" action="save">
<table>
<tr>
<td>Name :</td>
<td><form:input path="name" /></td>
</tr>
<tr>
<td>Salary :</td>
<td><form:input path="salary" /></td>
</tr>
<tr>
<td>Designation :</td>
<td><form:input path="designation" /></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Save" /></td>
</tr>
</table>
</form:form>
home.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ page session="false"%>
<html>
<head>
<title>Home</title>
</head>
<body>
<h1>Hello world!</h1>
<a href="empform">Add Employee</a>
<a href="viewemp">View Employees</a>
<P>The time on the server is ${serverTime}.</P>
</body>
</html>
viewemp.jsp
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<h1>Employees List</h1>
<table border="2" width="70%" cellpadding="2">
<tr>
<th>Id</th>
<th>Name</th>
<th>Salary</th>
<th>Designation</th>
<th>Edit</th>
<th>Delete</th>
</tr>
<c:forEach var="emp" items="${list}">
<tr>
<td>${emp.id}</td>
<td>${emp.name}</td>
<td>${emp.salary}</td>
<td>${emp.designation}</td>
<td><a href="editemp/${emp.id}">Edit</a></td>
<td><a href="deleteemp/${emp.id}">Delete</a></td>
</tr>
</c:forEach>
</table>
<br />
<a href="empform">Add New Employee</a>
7.web.xml을 수정합니다.
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- The definition of the Root Spring Container shared by all Servlets
and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class> org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
