项目实训第一周第二篇
文章目录
- xclass系统1.0版本学习
- 一、本地数据库搭建
- 二、服务器开发
-
- 1.答题统计API
- 2.题库列表API
xclass系统1.0版本学习
一、本地数据库搭建
下载并安装了HediSQL工具，使用了以前在本地搭建的MySQL会话，通过HediSQL连接并打开会话。
新建xclass1数据库，单击它，在菜单中选择运行SQL文件，选择xclass.sql，刷新。
本地数据库搭建完毕。
二、服务器开发
配置文件：
server.port=8081
spring.datasource.username=root
spring.datasource.password=Zzh/121380
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc\:mysql\://localhost\:3306/xclass1?serverTimezone\=UTC
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
1.答题统计API
编写实体类AnswerStatistics：
package com.example.demo.demain;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "t_answer_statistics")
public class AnswerStatistics {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "a_id")
private Long id; //答题记录id
@Column(name = "q_id")
private Long qId; //题ID
@Column(name = "answerer_date")
private Date answerDate;//答题日期
@Column(name = "device_id") //上传数据的TV设备 id
private String deviceId;
@Column(name = "answer_sum")
private int answerSum;//答题人数
@Column(name = "correct_sum")
private int correctSum;//正确人数
//省略getter/setter tostring方法
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Long getqId() {
return qId;
}
public void setqId(Long qId) {
this.qId = qId;
}
public Date getAnswerDate() {
return answerDate;
}
public void setAnswerDate(Date answerDate) {
this.answerDate = answerDate;
}
public String getDeviceId() {
return deviceId;
}
public void setDeviceId(String deviceId) {
this.deviceId = deviceId;
}
public int getAnswerSum() {
return answerSum;
}
public void setAnswerSum(int answerSum) {
this.answerSum = answerSum;
}
public int getCorrectSum() {
return correctSum;
}
public void setCorrectSum(int correctSum) {
this.correctSum = correctSum;
}
@Override
public String toString() {
return "AnswerStatistics [id=" + id + ", qId=" + qId + ", answerDate=" + answerDate + ", deviceId=" + deviceId
+ ", answerSum=" + answerSum + ", correctSum=" + correctSum + "]";
}
}
编写接口AnswerStatisticsDao：
/**
*
*/
package com.example.demo.dao;
/**
* @author Administrator
*
*/
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import com.example.demo.demain.AnswerStatistics;
public interface AnswerStatisticsDao extends JpaRepository<AnswerStatistics, Long>,
JpaSpecificationExecutor<AnswerStatistics>{
}
编写Controller：
package com.example.demo.controller;
import java.util.Date;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.example.demo.dao.AnswerStatisticsDao;
import com.example.demo.demain.AnswerStatistics;
@RequestMapping("/as")
@Controller
public class AnswerStatisticsController {
@Autowired
private AnswerStatisticsDao answerStatisticsDao;
@RequestMapping("/findAll")
@ResponseBody
public Object findAll(){
return answerStatisticsDao.findAll();
}
@RequestMapping("/findOne")
@ResponseBody
public Object findOne(Long id){
return answerStatisticsDao.findById(id);
}
@RequestMapping("/save")
@ResponseBody
public Object save(AnswerStatistics answerStatistics){
answerStatistics.setAnswerDate(new Date());
return answerStatisticsDao.save(answerStatistics);
}
}
测试答题统计API：
运行Demo1Application.java，选择作为Java Appilication运行：
在浏览器中输入网址http://127.0.0.1:8081/as/findAll，测试答题统计API：
API正常运行
2.题库列表API
编写实体类Question：
package com.example.demo.demain;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
/**
* 题实体类
*/
@Entity
@Table(name = "t_question")
public class Question {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "q_id")
private Long qId;
@Column(name = "q_num")
private Integer qNum;
@Column(name = "q_stem")
private String qStem; //题干
@JsonIgnoreProperties({"question"})
@OneToMany(mappedBy = "question")
private List<QOption> qOptions =new ArrayList<>();//选项
public Long getqId() {
return qId;
}
public void setqId(Long qId) {
this.qId = qId;
}
public Integer getqNum() {
return qNum;
}
public void setqNum(Integer qNum) {
this.qNum = qNum;
}
public String getqStem() {
return qStem;
}
public void setqStem(String qStem) {
this.qStem = qStem;
}
public List<QOption> getqOptions() {
return qOptions;
}
public void setqOptions(List<QOption> qOptions) {
this.qOptions = qOptions;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((qId == null) ? 0 : qId.hashCode());
result = prime * result + ((qNum == null) ? 0 : qNum.hashCode());
result = prime * result + ((qOptions == null) ? 0 : qOptions.hashCode());
result = prime * result + ((qStem == null) ? 0 : qStem.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Question other = (Question) obj;
if (qId == null) {
if (other.qId != null)
return false;
} else if (!qId.equals(other.qId))
return false;
if (qNum == null) {
if (other.qNum != null)
return false;
} else if (!qNum.equals(other.qNum))
return false;
if (qOptions == null) {
if (other.qOptions != null)
return false;
} else if (!qOptions.equals(other.qOptions))
return false;
if (qStem == null) {
if (other.qStem != null)
return false;
} else if (!qStem.equals(other.qStem))
return false;
return true;
}
}
编写实体类QOption：
package com.example.demo.demain;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
/**
* 选项实体类
*/
@Entity
@Table(name = "t_option")
public class QOption {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "o_id")
private Integer id;
@Column(name = "o_num" )
private String num;
@Column(name = "o_content")
private String content;//题干
@Column(name = "o_answer")
private boolean answer;
@ManyToOne(targetEntity = Question.class)
@JoinColumn(name = "o_q_id",referencedColumnName = "q_id")
private Question question;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNum() {
return num;
}
public void setNum(String num) {
this.num = num;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public boolean isAnswer() {
return answer;
}
public void setAnswer(boolean answer) {
this.answer = answer;
}
public Question getQuestion() {
return question;
}
public void setQuestion(Question question) {
this.question = question;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (answer ? 1231 : 1237);
result = prime * result + ((content == null) ? 0 : content.hashCode());
result = prime * result + ((id == null) ? 0 : id.hashCode());
result = prime * result + ((num == null) ? 0 : num.hashCode());
result = prime * result + ((question == null) ? 0 : question.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
QOption other = (QOption) obj;
if (answer != other.answer)
return false;
if (content == null) {
if (other.content != null)
return false;
} else if (!content.equals(other.content))
return false;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
if (num == null) {
if (other.num != null)
return false;
} else if (!num.equals(other.num))
return false;
if (question == null) {
if (other.question != null)
return false;
} else if (!question.equals(other.question))
return false;
return true;
}
}
编写接口QuestionDao：
package com.example.demo.dao;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import com.example.demo.demain.Question;
public interface QuestionDao extends JpaRepository<Question, Long>, JpaSpecificationExecutor<Question> {
}
编写接口QOptionDao：
package com.example.demo.dao;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import com.example.demo.demain.QOption;
public interface QOptionDao extends JpaRepository<QOption, Long>, JpaSpecificationExecutor<QOption> {
}
编写返回类型ResultData类：
package com.example.demo.demain;
import java.io.Serializable;
import java.util.List;
public class ResultData implements Serializable {
private List<Question> data = null;
public ResultData(List<Question> data) {
this.data = data;
}
public ResultData() {
}
public List<Question> getData() {
return data;
}
public void setData(List<Question> data) {
this.data = data;
}
}
编写QuestionController：
package com.example.demo.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.example.demo.dao.QuestionDao;
import com.example.demo.demain.ResultData;
@RequestMapping("/question")
@Controller
public class QuestionController {
@Autowired
private QuestionDao questionDao;
@RequestMapping("/findAll")
@ResponseBody
public Object findAll(){
ResultData result = new ResultData();
result.setData(questionDao.findAll());
return result;
}
@RequestMapping("/findOne")
@ResponseBody
public Object findOne(Long id){
return questionDao.findById(id);
}
}
测试题库列表API：
运行Demo1Application.java，选择作为Java Appilication运行：
在浏览器中输入网址http://127.0.0.1:8081/question/findAll，测试题库列表API：
API正常运行