02--SpringBoot之参数传递

一：url传参

1.get方式Url传参：@PathVariable

////------get方式Url传参 @GetMapping({"/id/{the_Param}"}) public String id(@PathVariable("the_Param") Integer id) { return "id:" + id; } 访问：http://localhost:8080/id/1994

2.get方式Url传参：@RequestParam

////------get方式Url传参 @GetMapping(/user) public String username(@RequestParam("username") String str) { return "username is:" + str; } 访问：http://localhost:8080/user?username=toly

3.get方式Url传参：@RequestParam+默认参数

////------get方式Url传参+默认参数 @GetMapping("/user_default") public String usernameWithDefaultParam( @RequestParam(value = "username", defaultValue = "toly1994") String str) { return "username is:" + str; } 访问：http://localhost:8080/user_default

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二：配置文件传值使用

1.配置文件字段使用

src\main\resources\application-dev.yml

name: black magic atk: 2500 desc: "name:${name} And atk:${atk}"

toly1994.com.toly01.controller.ParamController

------配置文件字段使用 @Value("${name}") private String lever; @Value("${atk}") private int atk; @Value("${desc}") private String desc; @GetMapping("/YoGiOh") public String paramInRes() { return desc; } 访问：http://localhost:8080/YoGiOh

2.获取配置文件组成员

2-1:写入字段—src\main\resources\application-dev.yml

monster: name: blue eyes white Dragon atk: 3000

2-2:创建实体类—toly1994.com.toly01.properties.MonsterProperties

@Component //org.springframework.stereotype.Component; @ConfigurationProperties(prefix = "monster") public class MonsterProperties { private String name; private int atk; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAtk() { return atk; } public void setAtk(int atk) { this.atk = atk; } @Override public String toString() { return "MonsterProperties{" + "name='" + name + '\'' + ", atk=" + atk + '}'; } }

2-3:增加方法—toly1994.com.toly01.controller.ParamController

-----获取配置文件组成员 @RestController public class HelloSpringBoot { @Autowired //自动创建对象 private MonsterProperties monster; @GetMapping("/monster") public String say() { return monster.toString(); } } 访问：http://localhost:8080/monster

转载于:https://www.cnblogs.com/toly-top/p/9781993.html