4、Controller的使用

1. 
   

2. @Controller
   @ResponseBody

1. 等同于RESTController
3. RequestMapping的使用
1. 给同一个方法指定多个RequestMapping
2. 给类添加RequestMapping
4. 指定RequestMapping的（）method属性

5. ---

   如何处理URL里面的参数?

1. @PathVariable的使用：
1. http://127.0.0.1:8080/hello/say/243
   
2. http://127.0.0.1:8080/hello/243/say

package com.girl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * Created by sunnyangzs on 2018/3/25.
 */

@RestController
@RequestMapping("/hello")
public class HelloController {

//    @Value("${cupSize}")
//    private String cupSize;
//
//    @Value("${age}")
//    private  Integer age;
//
//    @Value("${content}")
//    private String content;

    @Autowired
    private GirlProperties girlProperties;

    @RequestMapping(value = {"/say/{id}"},method = RequestMethod.GET)
    public String say(@PathVariable("id") Integer id){
//        return girlProperties.getCupSize();
        return "id: "+id;
    }

}
//把id写在了say的后面

35

 

1

package com.girl;

2

3

import org.springframework.beans.factory.annotation.Autowired;

4

import org.springframework.beans.factory.annotation.Value;

5

import org.springframework.stereotype.Controller;

6

import org.springframework.web.bind.annotation.*;

7

8

/**

9

 * Created by sunnyangzs on 2018/3/25.

10

 */

11

12

@RestController

13

@RequestMapping("/hello")

14

public class HelloController {

15

16

//    @Value("${cupSize}")

17

//    private String cupSize;

18

//

19

//    @Value("${age}")

20

//    private  Integer age;

21

//

22

//    @Value("${content}")

23

//    private String content;

24

25

    @Autowired

26

    private GirlProperties girlProperties;

27

28

    @RequestMapping(value = {"/say/{id}"},method = RequestMethod.GET)

29

    public String say(@PathVariable("id") Integer id){

30

//        return girlProperties.getCupSize();

31

        return "id: "+id;

32

    }

33

34

}

35

//把id写在了say的后面

package com.girl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * Created by sunnyangzs on 2018/3/25.
 */

@RestController
@RequestMapping("/hello")
public class HelloController {

//    @Value("${cupSize}")
//    private String cupSize;
//
//    @Value("${age}")
//    private  Integer age;
//
//    @Value("${content}")
//    private String content;

    @Autowired
    private GirlProperties girlProperties;

    @RequestMapping(value = {"/{id}/say"},method = RequestMethod.GET)
    public String say(@PathVariable("id") Integer id){
//        return girlProperties.getCupSize();
        return "id: "+id;
    }

}
//把id写在了say的前面

35

 

1

package com.girl;

2

3

import org.springframework.beans.factory.annotation.Autowired;

4

import org.springframework.beans.factory.annotation.Value;

5

import org.springframework.stereotype.Controller;

6

import org.springframework.web.bind.annotation.*;

7

8

/**

9

 * Created by sunnyangzs on 2018/3/25.

10

 */

11

12

@RestController

13

@RequestMapping("/hello")

14

public class HelloController {

15

16

//    @Value("${cupSize}")

17

//    private String cupSize;

18

//

19

//    @Value("${age}")

20

//    private  Integer age;

21

//

22

//    @Value("${content}")

23

//    private String content;

24

25

    @Autowired

26

    private GirlProperties girlProperties;

27

28

    @RequestMapping(value = {"/{id}/say"},method = RequestMethod.GET)

29

    public String say(@PathVariable("id") Integer id){

30

//        return girlProperties.getCupSize();

31

        return "id: "+id;

32

    }

33

34

}

35

//把id写在了say的前面
2. @RequestParam的使用方式
1. http://127.0.0.1:8080/hello/say?id=22223
   

package com.girl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * Created by sunnyangzs on 2018/3/25.
 */

@RestController
@RequestMapping("/hello")
public class HelloController {

//    @Value("${cupSize}")
//    private String cupSize;
//
//    @Value("${age}")
//    private  Integer age;
//
//    @Value("${content}")
//    private String content;

    @Autowired
    private GirlProperties girlProperties;

    @RequestMapping(value = {"/say"},method = RequestMethod.GET)
    public String say(@RequestParam("id") Integer id){
//        return girlProperties.getCupSize();
        return "id: "+id;
    }

}

1

35

 

1

package com.girl;

2

3

import org.springframework.beans.factory.annotation.Autowired;

4

import org.springframework.beans.factory.annotation.Value;

5

import org.springframework.stereotype.Controller;

6

import org.springframework.web.bind.annotation.*;

7

8

/**

9

 * Created by sunnyangzs on 2018/3/25.

10

 */

11

12

@RestController

13

@RequestMapping("/hello")

14

public class HelloController {

15

16

//    @Value("${cupSize}")

17

//    private String cupSize;

18

//

19

//    @Value("${age}")

20

//    private  Integer age;

21

//

22

//    @Value("${content}")

23

//    private String content;

24

25

    @Autowired

26

    private GirlProperties girlProperties;

27

28

    @RequestMapping(value = {"/say"},method = RequestMethod.GET)

29

    public String say(@RequestParam("id") Integer id){

30

//        return girlProperties.getCupSize();

31

        return "id: "+id;

32

    }

33

34

}

35

package com.girl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * Created by sunnyangzs on 2018/3/25.
 */

@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;
    }

}

 

1

package com.girl;

2

3

import org.springframework.beans.factory.annotation.Autowired;

4

import org.springframework.beans.factory.annotation.Value;

5

import org.springframework.stereotype.Controller;

6

import org.springframework.web.bind.annotation.*;

7

8

/**

9

 * Created by sunnyangzs on 2018/3/25.

10

 */

11

12

@RestController

13

@RequestMapping("/hello")

14

public class HelloController {

15

16

    @Autowired

17

    private GirlProperties girlProperties;

18

19

    @RequestMapping(value = {"/say"},method = RequestMethod.GET)

20

    public String say(@RequestParam("id") Integer myId){

21

//        return girlProperties.getCupSize();

22

        return "id: "+myId;

23

    }

24

25

}

26
6. 给url当中的参数设置默认值

package com.girl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * Created by sunnyangzs on 2018/3/25.
 */

@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;
    }

}

package com.girl; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.*; /** * Created by sunnyangzs on 2018/3/25. */ @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; } }

x

1

package com.girl;

2

3

import org.springframework.beans.factory.annotation.Autowired;

4

import org.springframework.beans.factory.annotation.Value;

5

import org.springframework.stereotype.Controller;

6

import org.springframework.web.bind.annotation.*;

7

8

/**

9

 * Created by sunnyangzs on 2018/3/25.

10

 */

11

12

@RestController

13

@RequestMapping("/hello")

14

public class HelloController {

15

16

    @Autowired

17

    private GirlProperties girlProperties;

18

19

    @RequestMapping(value = {"/say"},method = RequestMethod.GET)

20

    public String say(@RequestParam(value = "id",required = false,defaultValue = "0") Integer myId){

21

//        return girlProperties.getCupSize();

22

        return "id: "+myId;

23

    }

24

25

}

26
7. 组合注解的使用
1. GetMapping

package com.girl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * Created by sunnyangzs on 2018/3/25.
 */

@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;
    }

}

1

26

 

1

package com.girl;

2

3

import org.springframework.beans.factory.annotation.Autowired;

4

import org.springframework.beans.factory.annotation.Value;

5

import org.springframework.stereotype.Controller;

6

import org.springframework.web.bind.annotation.*;

7

8

/**

9

 * Created by sunnyangzs on 2018/3/25.

10

 */

11

12

@RestController

13

@RequestMapping("/hello")

14

public class HelloController {

15

16

    @Autowired

17

    private GirlProperties girlProperties;

18

19

    //@RequestMapping(value = {"/say"},method = RequestMethod.GET)

20

    @GetMapping(value="/say")

21

    public String say(@RequestParam(value = "id",required = false,defaultValue = "0") Integer myId){

22

//        return girlProperties.getCupSize();

23

        return "id: "+myId;

24

    }

25

26

}

27
8. 完

来自为知笔记(Wiz)