Configuration resources (jar package)
Tidy up front-end pages:
Write several core configuration files (application Context + wed. XML + jdbc. properties + log4j + spring MVC. xml)
All in the src directory:
applicationContext-mybatis.xml (file associated with configuration and mybatis)
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>
<!--Connect to the database-->
<bean id="ds" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driver1}"/>
<property name="url" value="${url1}"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</bean>
<!--Get sqlsession-->
<bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="ds"/>
<property name="typeAliasesPackage" value="com.bjsxt.pojo"/>
</bean>
<!--scanning mapper file-->
<bean id="mapper" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="factory"/>
<property name="basePackage" value="com.bjsxt.mapper"/>
</bean>
</beans>
applicationContext-service.xml (Configuration service layer):
<!--Scanning Business Layer Annotations-->
<context:component-scan base-package="com.bjsxt.service.impl"></context:component-scan>
If transactional operations are required:
<!--Configuration declaration transaction-->
<bean id="TransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="ds"></property>
</bean>
<!--Scanning transaction annotations-->
<tx:annotation-driven></tx:annotation-driven>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>mvc</servlet-name>
<!--Handle jsp All available-->
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-*.xml</param-value>
</context-param>
<!--Configuration listener-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
MVC stratification:
Control layer:
Because it is to test the function of uploading and downloading, I did not write the corresponding control layer separately, so I wrote a file and accessed it with annotations.
package com.bjsxt.controller;
import com.bjsxt.pojo.Student;
import com.bjsxt.service.StudentService;
import org.apache.commons.io.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.font.MultipleMaster;
import java.io.*;
import java.util.List;
import java.util.UUID;
@Controller
public class MyCon {
@Autowired
StudentService ss;
//Download Picture Operation
@RequestMapping("download")
public void download(String filename, String filetype, HttpServletRequest req, HttpServletResponse resp) throws IOException {
//Get the image path of the server
String realPath = req.getServletContext().getRealPath("/upload");
//Get the name and type of the image String filename,String filetype
File file=new File(realPath+"/"+filename);
//Write the file
InputStream inputStream=new FileInputStream(file);
//Setting properties to download locally
//1. Setting Length
resp.setContentLength((int)file.length());
//2. Setting type
resp.setContentType(filetype);
//3. Setting Response Header
resp.setHeader("Content-Disposition","attachment;filename="+filename);
//Write read files locally
OutputStream outputStream = resp.getOutputStream();
IOUtils.copy(inputStream,outputStream);
//Closed flow
outputStream.close();
inputStream.close();
}
@RequestMapping("filee")
public String filee(String uname, String pwd, MultipartFile fil) throws IOException {
System.out.println(uname+":"+pwd);
System.out.println(fil.getName()+"---"+fil.getSize()+"---"+fil.getContentType()+"---"+fil.getOriginalFilename());
fil.transferTo(new File("F:/img/"+fil.getOriginalFilename()));
return "redirect:/index.jsp";
}
@RequestMapping("insertStu")
public String insertStu(String name,int age,Double score, MultipartFile filename, HttpServletRequest req) throws IOException {
/*System.out.println(uname+":"+pwd);
System.out.println(fil.getName()+"---"+fil.getSize()+"---"+fil.getContentType()+"---"+fil.getOriginalFilename());*/
/* if (fil.getSize()>2*1024){
req.setAttribute("error","The largest upload file is 2kb ";
return "forward:/zhuce.jsp";
}*/
String realPath = req.getServletContext().getRealPath("/upload");
/*To prevent the same file name, overwrite the original file*/
String uuid = UUID.randomUUID().toString();
//The suffix name of the intercepted picture
String filname = filename.getOriginalFilename().substring(filename.getOriginalFilename().lastIndexOf("."));
String fname=uuid+filname;
File file=new File(realPath);
if (!file.exists()){
file.mkdirs();
}
//File upload completed
filename.transferTo(new File(file,fname));
Student student=new Student();
student.setAge(age);
student.setFilename(fname);
student.setName(name);
student.setScore(score);
student.setFiletype(filename.getContentType());
//Call the business layer
int addstu = ss.addstu(student);
if (addstu>0){
//Insert success
return "redirect:/findall";
}else {
//Insert failure
req.setAttribute("error","Insert failure");
return "forward:/save.jsp";
}
}
@RequestMapping("findall")
public String findall(HttpServletRequest req){
List<Student> students = ss.finall();
req.setAttribute("students",students);
return "forward:/stuList.jsp";
}
}
Mapper interface:
package com.bjsxt.mapper;
import com.bjsxt.pojo.Student;
import java.util.List;
public interface StudentMapper {
int insetstu(Student student);
List<Student> selAll();
}
Mapper.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.bjsxt.mapper.StudentMapper">
<insert id="insetstu" parameterType="student" >
insert into student values(default,#{name},#{age},#{score},#{filename},#{filetype})
</insert>
<select id="selAll" resultType="Student">
select * from student
</select>
</mapper>
Service interface:
package com.bjsxt.service;
import com.bjsxt.pojo.Student;
import java.util.List;
public interface StudentService {
public int addstu(Student student);
public List<Student> finall();
}
Service implementation class
package com.bjsxt.service.impl;
import com.bjsxt.mapper.StudentMapper;
import com.bjsxt.pojo.Student;
import com.bjsxt.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("ssi")
public class StudentServiceImpl implements StudentService {
@Autowired
StudentMapper studentMapper;
@Override
public int addstu(Student student) {
int insetstu = studentMapper.insetstu(student);
return insetstu;
}
@Override
public List<Student> finall() {
List<Student> students = studentMapper.selAll();
return students;
}
}
The pojo entity class:
package com.bjsxt.pojo;
import java.io.Serializable;
public class Student implements Serializable {
private int id;
private String name;
private int age;
private double score;
private String filename;
private String filetype;
public Student(int id, String name, int age, double score, String filename, String filetype) {
this.id = id;
this.name = name;
this.age = age;
this.score = score;
this.filename = filename;
this.filetype = filetype;
}
public Student() {
}
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 int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public double getScore() {
return score;
}
public void setScore(double score) {
this.score = score;
}
public String getFilename() {
return filename;
}
public void setFilename(String filename) {
this.filename = filename;
}
public String getFiletype() {
return filetype;
}
public void setFiletype(String filetype) {
this.filetype = filetype;
}
@Override
public String toString() {
return "Student{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
", score=" + score +
", filename='" + filename + '\'' +
", filetype='" + filetype + '\'' +
'}';
}
}
Achieving results:
