、概述
二、HTTP请求协议
三、HTTP响应协议
四、请求数据
1.简单实体参数
@RequestMapping("/simpleParam")
public String simpleParam(@RequestParam(name ="name" ,required = false ) String username, Integer age){
System.out.println (username +":"+age);//自动转换数据类型
return "OK";
}2.实体参数
@RequestMapping("/simplePojo")
public String simplePojo(User user){
System.out.println ( user );
return "ok";3.数组参数
@RequestMapping("/arrayParam")
public String arrayParam(String [] hobby){
System.out.println ( Arrays.toString ( hobby ) );
return "ok";
4.集合参数
@RequestMapping("/listParam")
public String listParam(@RequestParam List<String> hobby){
System.out.println ( hobby );
return "ok";
}5.日期参数
@RequestMapping("/dateParam")
public String dateParam(@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")LocalDateTime updateTime){
System.out.println (updateTime);
return "ok";
}
6.Json参数
@RequestMapping("/jsonParam")
public String jsonParam(@RequestBody User user){
System.out.println (user);
return "ok";
}7.路径参数
//路径参数
@RequestMapping("/path/{id}")
public String pathParam(@PathVariable Integer id){
System.out.println (id);
return "ok";
}
@RequestMapping("/path/{id}/{name}")
public String pathParams(@PathVariable Integer id,@PathVariable String name){
System.out.println (id);
return "ok";
}
五、响应数据
package com.itheima.controller;
import com.itheima.pojo.Address;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
@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 ( "西安" );
Address addr2=new Address ();
addr2.setProvince ( "陕西" );
addr2.setCity ( "西安" );
list.add ( addr );
list.add ( addr2 );
return list;
}
}
package com.itheima.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 +
'}';
}
}
import com.itheima.pojo.Address;
import com.itheima.pojo.Result;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
@RestController
public class ResponseController {
@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 ( "西安" );
Address addr2=new Address ();
addr2.setProvince ( "陕西" );
addr2.setCity ( "西安" );
list.add ( addr );
list.add ( addr2 );
return Result.success (list);
}
}
六、请求响应---响应案例
import com.itheima.pojo.Emp;
import com.itheima.pojo.Result;
import com.itheima.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 ();
System.out.println ( file );
List<Emp> empList = XmlParserUtils.parse ( file, Emp.class );
//2.对数据进行转换处理
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" );
}
String job = emp.getJob ();
if ("1".equals ( job )){
emp.setJob ( "讲师" );
}else if ("2".equals ( "gender" )){
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);
}
}
七、三层架构
八、分层解耦
九、IOC&DI案例
十、IOC详解
十一、DI详解
1.primary 为bean 设置优先级
2.Quakifier 指定注入的bean
3.Resource 用名字注入 AutoWired默认按照类型注入
文章来源：https://www.toymoban.com/news/detail-729056.html
文章来源地址https://www.toymoban.com/news/detail-729056.html
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