This is annotation based on Spring and Hibernate Version 4 project.
Run project using maven command: mvn clean package tomcat7:run
Short Tutorial & uses:
Spring JSTL:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
============File Upload:=============
1. pom.xml:
<!-- Common File Upload: -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.2</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>2. servlet-context.xml
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="20000000"/>
</bean>3. FileUpload.jsp
File Upload Example:
<form method="POST" action="upload" enctype="multipart/form-data" style="color:blue;border: 1px solid">
File to upload: <input type="file" name="file">
<br /> <br/>
<input type="submit" value="Upload"/> Press here to upload the file!
</form>
<br/><br/>
<label style="color:red">${successMsg}</label> 4. In Controller:
@Controller
@RequestMapping("/upload")
public class FileUploadController {
@RequestMapping(method = RequestMethod.GET)
public String index() {
return "fileUpload";
}
@RequestMapping(method = RequestMethod.POST)
public String upload(@RequestParam("file") MultipartFile file, Model model) throws IOException {
byte[] bytes;
if (!file.isEmpty()) {
bytes = file.getBytes();
//Write in file.
FileOutputStream out = new FileOutputStream( "D:\\temp\\"+ file.getOriginalFilename() );
out.write(bytes);
out.close();
}
System.out.println( "Received File:" + file.getOriginalFilename() );
model.addAttribute("successMsg", "File upload Success: "+ file.getOriginalFilename());
return "fileUpload";
}
}===============Spring Rest API Call===============
1. POM.xml : Need this for json to/from object: For SPRING REST Call
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.5.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.5.4</version>
</dependency>2. Controller: @RestController
@RestController
@RequestMapping("api/rest")
public class StudentRestController {
@Autowired
private StudentDao studentDao;
@RequestMapping(method = RequestMethod.GET)
public ResponseEntity<List<Student>> index() {
ResponseEntity<List<Student>> studList = new ResponseEntity<List<Student>>( studentDao.getAll(), HttpStatus.OK);
return studList;
}
}3. You need to have Jquery to send ajax rest call to server:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
4. Create /rest to go to rest testing jsp file:
@RequestMapping(value = "/rest", method = RequestMethod.GET)
public String restCall() {
return "rest";
}
- create rest.jsp file like this:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
<script src="${pageContext.request.contextPath }/resources/js/jquery-2.2.0.js"></script>
<!-- OR THIS
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
-->
</head>
<body>
<h3>Rest Call Example:</h3>
<a href="${pageContext.request.contextPath }/stud">Go To Student</a> <br/> <br/>
<input type="button" value="Get All Students: JSON Data" onclick="showJsonData()" /> <hr/>
<p id="displayJSON"></p>
</body>
<script type="text/javascript">
function showJsonData() {
/*AJAX GET*/
$.ajax({
type : "GET",
contentType : "application/json",
url : "api/rest",
}).then(function(data) {
$('#displayJSON').html(JSON.stringify(data));
});
}
</script>
</html>Where $.ajax is jquery Ajax server call method.
content type: application/json is to modify header information from text/html to json.
JSON.stringify is to convert JSON data to String.
$.ajax({
type : "GET",
contentType : "application/json",
url : "api/rest",
}).then(function(data) {
$('#displayJSON').html(JSON.stringify(data));
});
It will care server api/rest url(that is rest usrl it only accept/resturn json data.
======================LOG4J=====================
log4j is a reliable, fast and flexible logging framework (APIs) written in Java.
log4j has three main components:
loggers: Responsible for capturing logging information.
appenders: Responsible for publishing logging information to various preferred destinations.
layouts: Responsible for formatting logging information in different styles.
It uses multiple levels, namely ALL, TRACE, DEBUG, INFO, WARN, ERROR and FATAL
Log4j configuration in XML file format. (Create log4j.xml file in src/main/resources)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- Appenders -->
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="Target" value="System.out" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p: %c - %m%n" />
</layout>
</appender>
<appender name="file" class="org.apache.log4j.RollingFileAppender">
<param name="file" value="C:\\log4j-application.log" />
<param name="append" value="false" />
<param name="maxFileSize" value="5MB"/>
<param name="maxBackupIndex" value="10"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p: %c - %m%n" />
</layout>
</appender>
<!-- Application Loggers -->
<logger name="com.javastud.springmvcweb">
<level value="info" />
</logger>
<!-- 3rdparty Loggers -->
<logger name="org.springframework.core">
<level value="info" />
</logger>
<logger name="org.springframework.beans">
<level value="info" />
</logger>
<logger name="org.springframework.context">
<level value="info" />
</logger>
<logger name="org.springframework.web">
<level value="info" />
</logger>
<!-- Root Logger -->
<root>
<priority value="warn" />
<appender-ref ref="console" />
<appender-ref ref="file" />
<appender-ref ref="stdout" />
</root>
</log4j:configuration>
OR> Log4j configuration in properties file format. (you can create log4j.properties file as well):
# Root logger option
log4j.rootLogger=DEBUG, stdout, file
# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
# Redirect log messages to a log file, support file rolling.
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\log4j-application.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n