在controller中返回的数据都依赖于一个核心的注解@ReponseBody
@RestController是由两个注解组合而成,包含了@Controller和@ResponseBody
上面这种返回形式过于随机,不便维护,所以现在需要统一响应结果
在pojo下新接入一个Result类
package com.example.pojo;
/**
* 统一响应结果封装类
*/
public class Result {
private Integer code ;//1 成功 , 0 失败
private String msg; //提示信息
private Object data; //数据 data
public Result() {
}
public Result(Integer code, String msg, Object data) {
this.code = code;
this.msg = msg;
this.data = data;
}
public Integer getCode() {
return code;
}
public void setCode(Integer code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public static Result success(Object data){
return new Result(1, "success", data);
}
public static Result success(){
return new Result(1, "success", null);
}
public static Result error(String msg){
return new Result(0, msg, null);
}
@Override
public String toString() {
return "Result{" +
"code=" + code +
", msg='" + msg + '\'' +
", data=" + data +
'}';
}
}
package com.example.controller;
import com.example.pojo.Address;
import com.example.pojo.Result;
import com.example.pojo.Address;
import com.example.pojo.Result;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
/**
* 测试响应数据
*/
@RestController
public class ResponseController {
/*@RequestMapping("/hello")
public String hello(){
System.out.println("Hello World ~");
return "Hello World ~";
}
@RequestMapping("/getAddr")
public Address getAddr(){
Address addr = new Address();
addr.setProvince("广东");
addr.setCity("深圳");
return addr;
}
@RequestMapping("/listAddr")
public List<Address> listAddr(){
List<Address> list = new ArrayList<>();
Address addr = new Address();
addr.setProvince("广东");
addr.setCity("深圳");
Address addr2 = new Address();
addr2.setProvince("陕西");
addr2.setCity("西安");
list.add(addr);
list.add(addr2);
return list;
}*/
@RequestMapping("/hello")
public Result hello(){
System.out.println("Hello World ~");
//return new Result(1,"success","Hello World ~");
return Result.success("Hello World ~");
}
@RequestMapping("/getAddr")
public Result getAddr(){
Address addr = new Address();
addr.setProvince("广东");
addr.setCity("深圳");
return Result.success(addr);
}
@RequestMapping("/listAddr")
public Result listAddr(){
List<Address> list = new ArrayList<>();
Address addr = new Address();
addr.setProvince("广东");
addr.setCity("深圳");
Address addr2 = new Address();
addr2.setProvince("陕西");
addr2.setCity("西安");
list.add(addr);
list.add(addr2);
return Result.success(list);
}
}
三种不同形式的访问响应数据
案例:
案例流程
第一步:导入依赖
<dependency>
<groupId>org.dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>2.1.3</version>
</dependency>
第二步:引入工具类
package com.example.utils;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import java.io.File;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
public class XmlParserUtils {
public static <T> List<T> parse(String file , Class<T> targetClass) {
ArrayList<T> list = new ArrayList<T>(); //封装解析出来的数据
try {
//1.获取一个解析器对象
SAXReader saxReader = new SAXReader();
//2.利用解析器把xml文件加载到内存中,并返回一个文档对象
Document document = saxReader.read(new File(file));
//3.获取到根标签
Element rootElement = document.getRootElement();
//4.通过根标签来获取 user 标签
List<Element> elements = rootElement.elements("emp");
//5.遍历集合,得到每一个 user 标签
for (Element element : elements) {
//获取 name 属性
String name = element.element("name").getText();
//获取 age 属性
String age = element.element("age").getText();
//获取 image 属性
String image = element.element("image").getText();
//获取 gender 属性
String gender = element.element("gender").getText();
//获取 job 属性
String job = element.element("job").getText();
//组装数据
Constructor<T> constructor = targetClass.getDeclaredConstructor(String.class, Integer.class, String.class, String.class, String.class);
constructor.setAccessible(true);
T object = constructor.newInstance(name, Integer.parseInt(age), image, gender, job);
list.add(object);
}
} catch (Exception e) {
e.printStackTrace();
}
return list;
}
}
引入实体类,封装了员工数据
package com.example.pojo;
public class Emp {
private String name;
private Integer age;
private String image;
private String gender;
private String job;
public Emp() {
}
public Emp(String name, Integer age, String image, String gender, String job) {
this.name = name;
this.age = age;
this.image = image;
this.gender = gender;
this.job = job;
}
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 String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
@Override
public String toString() {
return "Emp{" +
"name='" + name + '\'' +
", age=" + age +
", image='" + image + '\'' +
", gender='" + gender + '\'' +
", job='" + job + '\'' +
'}';
}
}
引入XML文件
<?xml version="1.0" encoding="UTF-8" ?>
<emps>
<emp>
<name>金毛狮王</name>
<age>55</age>
<image>https://web-framework.oss-cn-hangzhou.aliyuncs.com/web/1.jpg</image>
<!-- 1: 男, 2: 女 -->
<gender>1</gender>
<!-- 1: 讲师, 2: 班主任 , 3: 就业指导 -->
<job>1</job>
</emp>
<emp>
<name>白眉鹰王</name>
<age>65</age>
<image>https://web-framework.oss-cn-hangzhou.aliyuncs.com/web/2.jpg</image>
<gender>1</gender>
<job>1</job>
</emp>
<emp>
<name>青翼蝠王</name>
<age>45</age>
<image>https://web-framework.oss-cn-hangzhou.aliyuncs.com/web/3.jpg</image>
<gender>1</gender>
<job>2</job>
</emp>
<emp>
<name>紫衫龙王</name>
<age>38</age>
<image>https://web-framework.oss-cn-hangzhou.aliyuncs.com/web/4.jpg</image>
<gender>2</gender>
<job>3</job>
</emp>
</emps>
注意:
springboot中的静态页面要存放在下面三个目录
Controller类的创建
定义好如下的一个Controller类并且写好一个接口和对应的访问路径
加载XML文件要知道XML文件的路径,如下获取
String file=this.getClass().getClassLoader().getResource("emp.xml").getFile();
然后解析XML并将其内容装进一个实体类对象里面
List<Emp> empList =XmlParserUtils.parse(file, Emp.class);
最后再根据需求将里面的数据该为需要的格式
/2.对数据进行转换处理-gender,job
empList.stream().forEach(emp->{
//处理 gender 1: 男, 2: 女
String gender = emp.getGender();
if("1".equals(gender)){
emp.setGender("男");
}else if("2".equals(gender)){
emp.setGender("女");
}
//处理job - 1: 讲师, 2: 班主任 , 3: 就业指导
String job = emp.getJob();
if("1".equals(job)){
emp.setJob("讲师");
}else if("2".equals(job)){
emp.setJob("班主任");
}else if("3".equals(job)){
emp.setJob("就业指导");
}
});
返回响应数据
return Result.success(empList);
访问输出结果如下,注意:路径中千万不要有中文或者其他非法字符
前端展示
前端通过钩子函数里面的axios请求拿到了响应数据并赋值给tableData并进行了展示