那个网站教做仙芋鲜,泰安网络推广seo,无锡餐饮网站建设,35岁学设计晚不晚文章目录 前言一、maven二、造数三、代码部分1.OpenCsvController2.OpenCsvUtil3.StudentInfo4.CodeToValue 三、效果展示1.download2.upload 总结 前言
csv文件是不同于excel文件的另一种文件#xff0c;常常以,作为分隔符#xff0c;本篇将通过JavaBean的形式完成对csv文件… 文章目录 前言一、maven二、造数三、代码部分1.OpenCsvController2.OpenCsvUtil3.StudentInfo4.CodeToValue 三、效果展示1.download2.upload 总结 前言
csv文件是不同于excel文件的另一种文件常常以,作为分隔符本篇将通过JavaBean的形式完成对csv文件的读取和写出等包含了对日期类型和码值类型数据的处理替换真正做到稍微修改即可用。 一、maven
!-- https://mvnrepository.com/artifact/com.opencsv/opencsv --dependencygroupIdcom.opencsv/groupIdartifactIdopencsv/artifactIdversion5.7.1/version/dependency二、造数
数据的话我数据库里有了这个步骤我就跳过了
三、代码部分
1.OpenCsvController
RestController
RequestMapping(opencsv)
public class OpenCsvController {Autowiredprivate StudentInfoService studentInfoService;GetMapping(/download)public void download(HttpServletResponse response) throws IOException {//ListListMapString, Object testsp testService.testsp();// 响应正文response.reset();response.setContentType(application/octet-stream);// 这里URLEncoder.encode可以防止中文乱码response.setHeader(Content-disposition, attachment;filenamet_student_info.csv);StudentInfoExample studentInfoExample new StudentInfoExample();studentInfoExample.setOrderByClause(CAST(id AS SIGNED));ListStudentInfo studentInfos studentInfoService.selectByExample(studentInfoExample);OpenCsvUtil.beanToCsv(new OutputStreamWriter(response.getOutputStream(),GBK),studentInfos);}RequestMapping(/upload)public void upload(MultipartFile file) throws IOException {OpenCsvUtil.csvToBean(file);}
}2.OpenCsvUtil
public class OpenCsvUtil {public static void beanToCsv(Writer writer, List list) {CSVWriter csvWriter null;try {csvWriter new CSVWriter(writer,CSVWriter.DEFAULT_SEPARATOR,CSVWriter.NO_QUOTE_CHARACTER,CSVWriter.NO_ESCAPE_CHARACTER,CSVWriter.DEFAULT_LINE_END);// 映射策略/*有序的,自己组织头*/
// String []headernew String[] {学号,姓名,年龄,出生日期,民族,证件类型,证件号码,手机号,入学时间,家庭住址,院系,专业,班级,辅导员,是否在籍};
// String []mappingnew String[] {id,name,age,birthday,nation,idType,idNumber,tel,admissionTime,address,faculty,major,classID,instructor,registered};
// mappingStrategy.setColumnMapping(mapping);
// csvWriter.writeNext(header);
// ColumnPositionMappingStrategy StudentInfo mappingStrategy new ColumnPositionMappingStrategy();/*无序的,头从注解中获取*/HeaderColumnNameMappingStrategyStudentInfo mappingStrategy new HeaderColumnNameMappingStrategy();mappingStrategy.setType(StudentInfo.class);mappingStrategy.generateHeader((StudentInfo)list.get(0));StatefulBeanToCsvStudentInfo statefulBeanToCsv new StatefulBeanToCsvBuilderStudentInfo(csvWriter).withMappingStrategy(mappingStrategy).build();statefulBeanToCsv.write(list);} catch (CsvRequiredFieldEmptyException e) {throw new RuntimeException(e);} catch (CsvDataTypeMismatchException e) {throw new RuntimeException(e);} finally {if (writer ! null) {try {writer.close();} catch (IOException e) {e.printStackTrace();}}}}public static void csvToBean(MultipartFile file) {CSVReader reader null;try {reader new CSVReader(new InputStreamReader(file.getInputStream(), GBK));HeaderColumnNameMappingStrategyStudentInfo mappingStrategy new HeaderColumnNameMappingStrategy();mappingStrategy.setType(StudentInfo.class);CsvToBeanStudentInfo build new CsvToBeanBuilderStudentInfo(reader).withType(StudentInfo.class).build();build.setMappingStrategy(mappingStrategy);ListStudentInfo beans build.parse();beans.forEach(System.out::println);} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {if (reader ! null) {reader.close();}} catch (IOException e) {e.printStackTrace();}}}
}3.StudentInfo
public class StudentInfo implements Serializable {private static final long serialVersionUID 1L;/** 学号 **/ApiModelProperty(value 学号)CsvBindByName(column学号)CsvBindByPosition(position 0)private String id;/** 姓名 **/ApiModelProperty(value 姓名)CsvBindByName(column姓名)CsvBindByPosition(position 1)private String name;/** 年龄 **/ApiModelProperty(value 年龄)CsvBindByName(column年龄)CsvBindByPosition(position 2)private Integer age;/** 出生日期 **/JsonFormat(pattern yyyy-MM-dd HH:mm:ss,timezoneGMT8)ApiModelProperty(value 出生日期)CsvBindByName(column出生日期)CsvDate(yyyy年MM月dd日)private Date birthday;/** 民族 **/ApiModelProperty(value 民族)CsvBindByName(column民族)private String nation;/** 证件类型 **/ApiModelProperty(value 证件类型)CsvBindByName(column证件类型)private String idType;/** 证件号码 **/ApiModelProperty(value 证件号码)CsvBindByName(column证件号码)private String idNumber;/** 手机号 **/ApiModelProperty(value 手机号)CsvBindByName(column手机号)private Integer tel;/** 入学时间 **/JsonFormat(pattern yyyy-MM-dd HH:mm:ss,timezoneGMT8)ApiModelProperty(value 入学时间)CsvDate(yyyy年MM月dd日 HH:mm:ss)CsvBindByName(column入学时间)private Date admissionTime;/** 家庭住址 **/ApiModelProperty(value 家庭住址)CsvBindByName(column家庭住址)private String address;/** 院系 **/ApiModelProperty(value 院系)CsvBindByName(column院系)private String faculty;/** 专业 **/ApiModelProperty(value 专业)CsvBindByName(column专业)private String major;/** 班级 **/ApiModelProperty(value 班级)CsvBindByName(column班级)private Integer classID;/** 辅导员 **/ApiModelProperty(value 辅导员)CsvBindByName(column辅导员)private String instructor;/** 是否在籍(0:否;1:是) **/ApiModelProperty(value 是否在籍(0:否;1:是))CsvCustomBindByName(column是否在籍,converter CodeToValue.class)private Character registered;/** 分数信息**/ApiModelProperty(value 分数信息StudentScore)private ArrayListStudentScore studentScore;public String getId() {return id;}public void setId(String id) {this.id id;}public String getName() {return name;}public void setName(String name) {this.name name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age age;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday birthday;}public String getNation() {return nation;}public void setNation(String nation) {this.nation nation;}public String getIdType() {return idType;}public void setIdType(String idType) {this.idType idType;}public String getIdNumber() {return idNumber;}public void setIdNumber(String idNumber) {this.idNumber idNumber;}public Integer getTel() {return tel;}public void setTel(Integer tel) {this.tel tel;}public Date getAdmissionTime() {return admissionTime;}public void setAdmissionTime(Date admissionTime) {this.admissionTime admissionTime;}public String getAddress() {return address;}public void setAddress(String address) {this.address address;}public String getFaculty() {return faculty;}public void setFaculty(String faculty) {this.faculty faculty;}public String getMajor() {return major;}public void setMajor(String major) {this.major major;}public Integer getClassID() {return classID;}public void setClassID(Integer classID) {this.classID classID;}public String getInstructor() {return instructor;}public void setInstructor(String instructor) {this.instructor instructor;}public Character getRegistered() {return registered;}public void setRegistered(Character registered) {this.registered registered;}public ArrayListStudentScore getStudentScore() {return studentScore;}public void setStudentScore(ArrayListStudentScore studentScore) {this.studentScore studentScore;}public StudentInfo() {super();}public StudentInfo(String id, String name, Integer age, Date birthday, String nation, String idType, String idNumber, Integer tel, Date admissionTime, String address, String faculty, String major, Integer classID, String instructor, Character registered) {this.id id;this.name name;this.age age;this.birthday birthday;this.nation nation;this.idType idType;this.idNumber idNumber;this.tel tel;this.admissionTime admissionTime;this.address address;this.faculty faculty;this.major major;this.classID classID;this.instructor instructor;this.registered registered;}Overridepublic String toString() {return StudentInfo{ id id , name name \ , age age , birthday birthday , nation nation \ , idType idType \ , idNumber idNumber \ , tel tel , admissionTime admissionTime , address address \ , faculty faculty \ , major major \ , classID classID , instructor instructor \ , registered registered , studentScore studentScore };}
}4.CodeToValue
public class CodeToValue extends AbstractBeanField {Overrideprotected Object convert(String s) throws CsvDataTypeMismatchException, CsvConstraintViolationException {if(s.equals(否)){return 0;}if(s.equals(是)){return 1;}return null;}Overridepublic String convertToWrite(Object value) {if(String.valueOf(value).equals(0)){return 否;}if(String.valueOf(value).equals(1)){return 是;}return null;}
}三、效果展示
1.download 2.upload 总结
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