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Spring Boot的Controller的使用

程序员文章站 2022-03-14 19:27:56
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一 Controller相关注解
Spring Boot的Controller的使用
Spring Boot的Controller的使用
二 模板的使用
1 编辑pom文件
<project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.imooc</groupId>
  <artifactId>girl</artifactId>
  <version>0.0.1-SNAPSHOT</version>
 
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.1.RELEASE</version>
  </parent>
 
  <properties>
     <java.version>1.8</java.version>
  </properties>
 
  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
   
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
  </dependencies>
 
</project>
2 新建模板文件index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>hello Spring boot</h1>
</body>
</html>
3 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@Controller
public class HelloController {
    @Autowired
    private GirlProperties girlProperties;
    @RequestMapping(value="/hello",method=RequestMethod.GET)
    public String say()
    {
        //return girlProperties.getCupSize();
        return "index";
    }
}
4 测试模板
Spring Boot的Controller的使用
三 注解@Controller和@ResponseBody的配合使用
1 HelloController编写
package com.imooc;
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.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@ResponseBody
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value="/hello",method=RequestMethod.GET)
     public String say()
     {
           return girlProperties.getCupSize();
     }
}
2 效果测试
Spring Boot的Controller的使用
四 注解@RequestMapping的多URL应用
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value={"/hello","/hi"},method=RequestMethod.GET)
     public String say()
     {
           return girlProperties.getCupSize();
     }
}
2 效果测试
Spring Boot的Controller的使用
五 注解@RequestMapping修饰整个类的应用
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/hello")
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value="/say",method=RequestMethod.GET)
     public String say()
     {
           return girlProperties.getCupSize();
     }
}
2 效果测试
Spring Boot的Controller的使用
六 注解@RequestMapping的POST方式
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/hello")
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value="/say",method=RequestMethod.POST)
     public String say()
     {
           return girlProperties.getCupSize();
     }
}
2 postman工具测试效果
Spring Boot的Controller的使用
七 注解@RequestMapping不写POST或GET方式
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/hello")
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value="/say")
     public String say()
     {
           return girlProperties.getCupSize();
     }
}
2 postman工具测试效果
Spring Boot的Controller的使用
3 结论
如果注解@RequestMapping不写POST或GET方式，两种方式都可以访问，但为了安全起见，不推荐这样做。

八 注解@PathVariable的应用
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/hello")
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value="/say/{id}",method=RequestMethod.GET)
     public String say(@PathVariable("id") Integer id)
     {
           //return girlProperties.getCupSize();
           return "id:"+id;
     }
}
2 测试效果
Spring Boot的Controller的使用
九 注解@RequestParam的基本应用
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/hello")
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value="/say",method=RequestMethod.GET)
     public String say(@RequestParam("id") Integer myid)
     {
           //return girlProperties.getCupSize();
           return "id:"+myid;
     }
}
2 测试效果
Spring Boot的Controller的使用
十 注解@RequestParam之参数设置默认值应用
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/hello")
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     @RequestMapping(value="/say",method=RequestMethod.GET)
     public String say(@RequestParam(value="id",required = false,defaultValue="0") Integer myid)
     {
           //return girlProperties.getCupSize();
           return "id:"+myid;
     }
}
2 测试效果
Spring Boot的Controller的使用
十一 注解GetMapping的使用
1 HelloController编写
package com.imooc;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/hello")
public class HelloController {
     @Autowired
     private GirlProperties girlProperties;
     
     //@RequestMapping(value="/say",method=RequestMethod.GET)
     @GetMapping(value="/say")
     public String say(@RequestParam(value="id",required = false,defaultValue="0") Integer myid)
     {
           //return girlProperties.getCupSize();
           return "id:"+myid;
     }
}
2 测试效果
Spring Boot的Controller的使用
相关标签： 注解

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