1. 参数传递：
-- 简单参数
如果方法形参数名称与请求方法名称不匹配，采用@RequestParam注解
-- 实体参数
-- 数组集合参数
-- 日期参数
-- JSON参数
-- 路径参数
2. 统一响应结果
-- 1. 创建Result类（放到pojo包中）
package demo01.pojo;
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;
}
/**
* 获取
* @return code
*/
public Integer getCode() {
return code;
}
/**
* 设置
* @param code
*/
public void setCode(Integer code) {
this.code = code;
}
/**
* 获取
* @return msg
*/
public String getMsg() {
return msg;
}
/**
* 设置
* @param msg
*/
public void setMsg(String msg) {
this.msg = msg;
}
/**
* 获取
* @return data
*/
public Object getData() {
return data;
}
/**
* 设置
* @param 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);
}
public String toString() {
return "Result{code = " + code + ", msg = " + msg + ", data = " + data + "}";
}
}
-- 2. 修改接口
// 修改前
// @RequestMapping("/hello")
// public String hello(){
// return "Hello World!";
// }
// 统一响应结果（修改后）
@RequestMapping("/hello")
public Result hello(){
return Result.success("Hello World!");
}案例：获取员工数据，返回统一响应结果，在页面渲染展示
目录结构：
1. 在pom.xml 文件中引入dom4j的依赖，用于解析XML文件
<dependency>
<groupId>org.dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>2.1.3</version>
</dependency>2.编写解析XML的工具类XMLParserUtils、对应的实体类Emp、XML文件emp.xml
XMLParserUtils:
package demo01.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;
}
}
实体类Emp:
package demo01.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 + '\'' +
'}';
}
}
XML文件emp.xml:
<?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>
3. 引入静态页面文件
emp.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>员工信息</title>
</head>
<link rel="stylesheet" href="element-ui/index.css">
<script src="./js/vue.js"></script>
<script src="./element-ui/index.js"></script>
<script src="./js/axios-0.18.0.js"></script>
<body>
<h1 align="center">员工信息列表展示</h1>
<div id="app">
<el-table :data="tableData" style="width: 100%" stripe border >
<el-table-column prop="name" label="姓名" align="center" min-width="20%"></el-table-column>
<el-table-column prop="age" label="年龄" align="center" min-width="20%"></el-table-column>
<el-table-column label="图像" align="center" min-width="20%">
<template slot-scope="scope">
<el-image :src="scope.row.image" style="width: 80px; height: 50px;"></el-image>
</template>
</el-table-column>
<el-table-column prop="gender" label="性别" align="center" min-width="20%"></el-table-column>
<el-table-column prop="job" label="职位" align="center" min-width="20%"></el-table-column>
</el-table>
</div>
</body>
<style>
.el-table .warning-row {
background: oldlace;
}
.el-table .success-row {
background: #f0f9eb;
}
</style>
<script>
new Vue({
el: "#app",
data() {
return {
tableData: []
}
},
mounted(){
axios.get('/listEmp').then(res=>{
if(res.data.code){
this.tableData = res.data.data;
}
});
},
methods: {
}
});
</script>
</html>
4. 编写Controller程序，处理请求，响应数据
EmpController：
package demo01.Controller;
import demo01.pojo.Emp;
import demo01.pojo.Result;
import demo01.utils.XmlParserUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
public class EmpController {
@RequestMapping("/listEmp")
public Result list(){
// 1. 加载并解析XML文件
String file = this.getClass().getClassLoader().getResource("emp.xml").getFile();
// 此时file是emp.xml的磁盘路径
List<Emp> empList = XmlParserUtils.parse(file, Emp.class);
// 2. 对数据进行转换处理
empList.stream().forEach(emp -> { // 此时是个循环，遍历empList集合
// 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");
});
// 3. 响应数据
return Result.success(empList);
}
}
返回结果：
