项目搭建
技术
SpringBoot、mybatis、lombok、MySQL、easyexcel、maven目录
1、所需依赖pom.xml
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.6.7
com.jc
MusicTest
0.0.1-SNAPSHOT
MusicTest
MusicTest
1.8
org.springframework.boot
spring-boot-starter-web
org.mybatis.spring.boot
mybatis-spring-boot-starter
2.2.2
mysql
mysql-connector-java
runtime
org.projectlombok
lombok
true
org.springframework.boot
spring-boot-starter-test
test
com.alibaba
easyexcel
2.1.1
org.springframework.boot
spring-boot-maven-plugin
org.projectlombok
lombok
2、application.properties配置信息
server.port=1313
spring.datasource.url=jdbc:mysql:///music?serverTimeZone=GMT%2B8&CharacterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=root
mybatis.mapper-locations=classpath:/mapper/*.xml
logging.level.com.jc=debug3、pojo
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Message implements Serializable {
private static final long serialVersionUID = -4948906497251043325L;
private Integer id;
@ExcelProperty(value = "歌曲",index = 0)
private String song;
@ExcelProperty(value = "歌手",index = 1)
private String name;
@ExcelProperty(value = "性别",index = 2)
private String sex;
@ExcelProperty(value = "创建时间",index = 3)
private String createTime;
}4、mapper
@Mapper
public interface MessageMapper {
List selectAll(@Param("pageSize") Integer pageSize,@Param("size") Integer size);
int insertMusic(@Param("message") Message message);
int deleteMusic(Integer id);
int updateMusic(@Param("message") Message message);
List selectCondition(@Param("message") Message message,@Param("pageSize") Integer pageSize,@Param("size") Integer size);
int selectCount();
List downloadExcel(@Param("name") String name);
int insertExcel(@Param("message") Message message);
// List findAll();
} 5、mapper.xml
insert into message
(song,name,sex,createtime)
values
(#{message.song},#{message.name},#{message.sex},#{message.createTime})
delete from message where id=#{id};
update message set
song=#{message.song},name=#{message.name},sex=#{message.sex}
where id=#{message.id}
insert into message (song,name,sex,createtime)
values
(#{message.song},#{message.name},#{message.sex},#{message.createTime})
6、service
public interface MessageService {
List selectAll(Integer pageSize,Integer size);
int insertMusic(Message message);
int deleteMusic(Integer id);
int updateMusic(Message message);
List selectCondition(Message message,Integer pageSize,Integer size);
int selectCount();
void downloadExcel(HttpServletResponse response,String name);
String insertExcel(Message message);
// void findAll(HttpServletResponse response);
} 7、serviceImpl
@Service
public class MessageServiceImpl implements MessageService {
@Autowired
private MessageMapper messageMapper;
@Override
public List selectAll(Integer pageSize, Integer size) {
return messageMapper.selectAll(pageSize,size);
}
@Override
public int insertMusic(Message message) {
return messageMapper.insertMusic(message);
}
@Override
public int deleteMusic(Integer id) {
return messageMapper.deleteMusic(id);
}
@Override
public int updateMusic(Message message) {
return messageMapper.updateMusic(message);
}
@Override
public List selectCondition(Message message,Integer pageSize,Integer size) {
return messageMapper.selectCondition(message,pageSize,size);
}
@Override
public int selectCount() {
return messageMapper.selectCount();
}
@Override
public void downloadExcel(HttpServletResponse response,String name) {
try {
String filename = URLEncoder.encode("MusicExcel", "utf-8");
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
response.setHeader("Content-Disposition","attachment;filename=" + filename + ".xlsx");
EasyExcel.write(response.getOutputStream(),Message.class).sheet().doWrite(data(name));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public String insertExcel(Message message) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
simpleDateFormat.applyPattern("yyyy-MM-dd HH:mm:ss");
Date date = new Date();
message.setCreateTime(simpleDateFormat.format(date));
if (message.getSex().equals("男")){
message.setSex("1");
}else if (message.getSex().equals("女")){
message.setSex("2");
}else {
return "数据存储失败，请重试！";
}
int i = messageMapper.insertExcel(message);
if (i>=1){
return "数据存储成功";
}else {
return "数据存储失败,请重试！";
}
}
// @Override
// public void findAll(HttpServletResponse response) {
// try {
// String filename = URLEncoder.encode("MusicExcel", "utf-8");
// response.setContentType("application/vnd.ms-excel");
// response.setCharacterEncoding("utf-8");
// response.setHeader("Content-Disposition","attachment;filename=" + filename + ".xlsx");
// EasyExcel.write(response.getOutputStream(),Message.class).sheet().doWrite(data());
// } catch (UnsupportedEncodingException e) {
// e.printStackTrace();
// } catch (IOException e) {
// e.printStackTrace();
// }
// }
// private List data() {
// return messageMapper.findAll();
// }
private List data(String name) {
List messages = messageMapper.downloadExcel(name);
for (Message message:messages) {
if (message.getSex().equals("1")){
message.setSex("男");
}else if (message.getSex().equals("2")){
message.setSex("女");
}
}
return messages;
}
}
8、excelListener
public class MessageListenerExcel extends AnalysisEventListener {
private MessageService messageService;
public MessageListenerExcel(MessageService messageService){
this.messageService=messageService;
}
@Override
public void invoke(Message message, AnalysisContext analysisContext) {
saveMessage(message);
}
private void saveMessage(Message message) {
messageService.insertExcel(message);
}
@Override
public void doAfterAllAnalysed(AnalysisContext analysisContext) {
System.out.println("数据存储成功");
}
} 9、controller
@RestController
public class MessageController {
@Autowired
private MessageService messageService;
@CrossOrigin
@GetMapping("selectAll/{pageSize}/{size}")
public List selectAll(@PathVariable Integer pageSize,@PathVariable Integer size){
pageSize=(pageSize-1)*size;
return messageService.selectAll(pageSize,size);
}
@CrossOrigin
@PostMapping("insertMessage")
public String insertMessage(@RequestBody Message message){
SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
simpleDateFormat.applyPattern("yyyy-MM-dd HH:mm:ss");
Date date = new Date();
message.setCreateTime(simpleDateFormat.format(date));
if (message.getSex().equals("男")){
message.setSex("1");
}else if (message.getSex().equals("女")){
message.setSex("2");
}else {
return "数据错误，请重试！";
}
int i = messageService.insertMusic(message);
if (i>=1){
return "数据添加成功";
}else {
return "数据添加失败，请重试！";
}
}
@CrossOrigin
@DeleteMapping("deleteMessage")
public String deleteMessage(@RequestBody Message message){
int i = messageService.deleteMusic(message.getId());
if (i>=1){
return "数据删除成功";
}else {
return "数据删除失败，请重试!";
}
}
@CrossOrigin
@PostMapping("updateMessage")
public String updateMessage(@RequestBody Message message){
if(message.getSex().equals("男")){
message.setSex("1");
}else if (message.getSex().equals("女")){
message.setSex("2");
}
int i = messageService.updateMusic(message);
if (i>=1){
return "数据修改成功";
}else {
return "数据修改失败，请重试！";
}
}
@CrossOrigin
@PostMapping("selectCondition/{pageSize}/{size}")
public List selectCondition(@RequestBody Message message,@PathVariable Integer pageSize,@PathVariable Integer size){
pageSize=(pageSize-1)*size;
return messageService.selectCondition(message,pageSize,size);
}
@CrossOrigin
@GetMapping("selectCount")
public Integer selectCount(){
return messageService.selectCount();
}
@CrossOrigin
@GetMapping("downloadExcel/{name}")
public void downloadExcel(HttpServletResponse response,@PathVariable String name){
messageService.downloadExcel(response,name);
}
@CrossOrigin
@PostMapping("uploadExcel")
public String uploadExcel(MultipartFile file){
try {
EasyExcel.read(file.getInputStream(),Message.class,new MessageListenerExcel(messageService)).sheet().doRead();
} catch (IOException e) {
e.printStackTrace();
}
return "导入成功";
}
// @CrossOrigin
// @GetMapping("findAll")
// public void findAll(HttpServletResponse response){
// messageService.findAll(response);
// }
}