How take always first parameter when requested array type param in spring mvc using @RequestParam

I wrote this code.

@GetMapping("/test")

public Response search(@RequestParam String value) {

    System.out.println(value);

    return new Response(value)

}

Some body request like

/test?value=a&value=b&value=c

value binded a,b,c
I want always bind first parmeter. Take a, ignore b, c.

Is there way using @RequestParam?
Or have to use HttpServletRequest and parsing parameter?

asked Nov 21 at 2:49

KI-YOUNG BANG

595

add a comment |

I wrote this code.

@GetMapping("/test")

public Response search(@RequestParam String value) {

    System.out.println(value);

    return new Response(value)

}

Some body request like

/test?value=a&value=b&value=c

value binded a,b,c
I want always bind first parmeter. Take a, ignore b, c.

Is there way using @RequestParam?
Or have to use HttpServletRequest and parsing parameter?

asked Nov 21 at 2:49

KI-YOUNG BANG

595

add a comment |

I wrote this code.

@GetMapping("/test")

public Response search(@RequestParam String value) {

    System.out.println(value);

    return new Response(value)

}

Some body request like

/test?value=a&value=b&value=c

value binded a,b,c
I want always bind first parmeter. Take a, ignore b, c.

Is there way using @RequestParam?
Or have to use HttpServletRequest and parsing parameter?

asked Nov 21 at 2:49

KI-YOUNG BANG

595

I wrote this code.

@GetMapping("/test")

public Response search(@RequestParam String value) {

    System.out.println(value);

    return new Response(value)

}

Some body request like

/test?value=a&value=b&value=c

value binded a,b,c
I want always bind first parmeter. Take a, ignore b, c.

Is there way using @RequestParam?
Or have to use HttpServletRequest and parsing parameter?

arrays spring model-view-controller parameters request

asked Nov 21 at 2:49

KI-YOUNG BANG

595

asked Nov 21 at 2:49

KI-YOUNG BANG

595

asked Nov 21 at 2:49

KI-YOUNG BANG

595

asked Nov 21 at 2:49

KI-YOUNG BANG

595

asked Nov 21 at 2:49

KI-YOUNG BANG

595

add a comment |

2 Answers
2

active

oldest

votes

In this case you can use @RequestParam List<String> value instead of @RequestParam String value, and get the first value value.get(0) ignore the rest of them

For Example

http://rentacar.com/api/v1/search?make=audi&model=A8&type=6&type=11&type=12&color=RED&color=GREY

Method

public List<Vehicle> search(

@RequestParam(value="make", required=false) String make, 

@RequestParam(value="model", required=false) String model, 

@RequestParam(value="type", required=false) List<String> types, 

@RequestParam(value="color", required=false) List<String> colors)

  {

    ....

  }

answered Nov 21 at 5:16

Deadpool

3,7442324

add a comment |

Great question!

I wrote this code to find out how this works. I included it in the test packages.

@RunWith(SpringRunner.class)

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)

@ActiveProfiles("test")

public class ControllerTest {



    @LocalServerPort

    private int port;



    private URL url;



    @Autowired

    private TestRestTemplate template;



    @Before

    public void setUp() throws Exception {

        this.url = new URL("http://localhost:" + port + "/test?value=a&value=b&value=c");

    }



    @Test

    public void getHello() throws Exception {

        ResponseEntity<String> response = template.getForEntity(url.toString(),

                String.class);

        Assert.assertEquals(HttpStatus.OK, response.getStatusCode());

        Assert.assertEquals(response.getBody(), "a");

        System.out.println("response = " + response);

    }



}

I then modified your code to accept an array of strings, and only pass the first element to your Response Constructor.

Notice the changes in your code in the signature and return statement.

@GetMapping("/test")

    public String search(@RequestParam String value) {

        System.out.println(value);

        return new Response(value[0]);

    }

With your test, you can now explore using a List type for your request param and quickly see how the behaviour has changed.

answered Nov 21 at 5:21

Lachlan Lindsay

197113

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

In this case you can use @RequestParam List<String> value instead of @RequestParam String value, and get the first value value.get(0) ignore the rest of them

For Example

http://rentacar.com/api/v1/search?make=audi&model=A8&type=6&type=11&type=12&color=RED&color=GREY

Method

public List<Vehicle> search(

@RequestParam(value="make", required=false) String make, 

@RequestParam(value="model", required=false) String model, 

@RequestParam(value="type", required=false) List<String> types, 

@RequestParam(value="color", required=false) List<String> colors)

  {

    ....

  }

answered Nov 21 at 5:16

Deadpool

3,7442324

add a comment |

In this case you can use @RequestParam List<String> value instead of @RequestParam String value, and get the first value value.get(0) ignore the rest of them

For Example

http://rentacar.com/api/v1/search?make=audi&model=A8&type=6&type=11&type=12&color=RED&color=GREY

Method

public List<Vehicle> search(

@RequestParam(value="make", required=false) String make, 

@RequestParam(value="model", required=false) String model, 

@RequestParam(value="type", required=false) List<String> types, 

@RequestParam(value="color", required=false) List<String> colors)

  {

    ....

  }

answered Nov 21 at 5:16

Deadpool

3,7442324

add a comment |

In this case you can use @RequestParam List<String> value instead of @RequestParam String value, and get the first value value.get(0) ignore the rest of them

For Example

http://rentacar.com/api/v1/search?make=audi&model=A8&type=6&type=11&type=12&color=RED&color=GREY

Method

public List<Vehicle> search(

@RequestParam(value="make", required=false) String make, 

@RequestParam(value="model", required=false) String model, 

@RequestParam(value="type", required=false) List<String> types, 

@RequestParam(value="color", required=false) List<String> colors)

  {

    ....

  }

answered Nov 21 at 5:16

Deadpool

3,7442324

In this case you can use @RequestParam List<String> value instead of @RequestParam String value, and get the first value value.get(0) ignore the rest of them

For Example

http://rentacar.com/api/v1/search?make=audi&model=A8&type=6&type=11&type=12&color=RED&color=GREY

Method

public List<Vehicle> search(

@RequestParam(value="make", required=false) String make, 

@RequestParam(value="model", required=false) String model, 

@RequestParam(value="type", required=false) List<String> types, 

@RequestParam(value="color", required=false) List<String> colors)

  {

    ....

  }

answered Nov 21 at 5:16

Deadpool

3,7442324

answered Nov 21 at 5:16

Deadpool

3,7442324

answered Nov 21 at 5:16

Deadpool

3,7442324

answered Nov 21 at 5:16

Deadpool

3,7442324

add a comment |

Great question!

I wrote this code to find out how this works. I included it in the test packages.

@RunWith(SpringRunner.class)

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)

@ActiveProfiles("test")

public class ControllerTest {



    @LocalServerPort

    private int port;



    private URL url;



    @Autowired

    private TestRestTemplate template;



    @Before

    public void setUp() throws Exception {

        this.url = new URL("http://localhost:" + port + "/test?value=a&value=b&value=c");

    }



    @Test

    public void getHello() throws Exception {

        ResponseEntity<String> response = template.getForEntity(url.toString(),

                String.class);

        Assert.assertEquals(HttpStatus.OK, response.getStatusCode());

        Assert.assertEquals(response.getBody(), "a");

        System.out.println("response = " + response);

    }



}

I then modified your code to accept an array of strings, and only pass the first element to your Response Constructor.

Notice the changes in your code in the signature and return statement.

@GetMapping("/test")

    public String search(@RequestParam String value) {

        System.out.println(value);

        return new Response(value[0]);

    }

With your test, you can now explore using a List type for your request param and quickly see how the behaviour has changed.

answered Nov 21 at 5:21

Lachlan Lindsay

197113

add a comment |

Great question!

I wrote this code to find out how this works. I included it in the test packages.

@RunWith(SpringRunner.class)

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)

@ActiveProfiles("test")

public class ControllerTest {



    @LocalServerPort

    private int port;



    private URL url;



    @Autowired

    private TestRestTemplate template;



    @Before

    public void setUp() throws Exception {

        this.url = new URL("http://localhost:" + port + "/test?value=a&value=b&value=c");

    }



    @Test

    public void getHello() throws Exception {

        ResponseEntity<String> response = template.getForEntity(url.toString(),

                String.class);

        Assert.assertEquals(HttpStatus.OK, response.getStatusCode());

        Assert.assertEquals(response.getBody(), "a");

        System.out.println("response = " + response);

    }



}

I then modified your code to accept an array of strings, and only pass the first element to your Response Constructor.

Notice the changes in your code in the signature and return statement.

@GetMapping("/test")

    public String search(@RequestParam String value) {

        System.out.println(value);

        return new Response(value[0]);

    }

With your test, you can now explore using a List type for your request param and quickly see how the behaviour has changed.

answered Nov 21 at 5:21

Lachlan Lindsay

197113

add a comment |

Great question!

I wrote this code to find out how this works. I included it in the test packages.

@RunWith(SpringRunner.class)

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)

@ActiveProfiles("test")

public class ControllerTest {



    @LocalServerPort

    private int port;



    private URL url;



    @Autowired

    private TestRestTemplate template;



    @Before

    public void setUp() throws Exception {

        this.url = new URL("http://localhost:" + port + "/test?value=a&value=b&value=c");

    }



    @Test

    public void getHello() throws Exception {

        ResponseEntity<String> response = template.getForEntity(url.toString(),

                String.class);

        Assert.assertEquals(HttpStatus.OK, response.getStatusCode());

        Assert.assertEquals(response.getBody(), "a");

        System.out.println("response = " + response);

    }



}

I then modified your code to accept an array of strings, and only pass the first element to your Response Constructor.

Notice the changes in your code in the signature and return statement.

@GetMapping("/test")

    public String search(@RequestParam String value) {

        System.out.println(value);

        return new Response(value[0]);

    }

With your test, you can now explore using a List type for your request param and quickly see how the behaviour has changed.

answered Nov 21 at 5:21

Lachlan Lindsay

197113

Great question!

I wrote this code to find out how this works. I included it in the test packages.

@RunWith(SpringRunner.class)

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)

@ActiveProfiles("test")

public class ControllerTest {



    @LocalServerPort

    private int port;



    private URL url;



    @Autowired

    private TestRestTemplate template;



    @Before

    public void setUp() throws Exception {

        this.url = new URL("http://localhost:" + port + "/test?value=a&value=b&value=c");

    }



    @Test

    public void getHello() throws Exception {

        ResponseEntity<String> response = template.getForEntity(url.toString(),

                String.class);

        Assert.assertEquals(HttpStatus.OK, response.getStatusCode());

        Assert.assertEquals(response.getBody(), "a");

        System.out.println("response = " + response);

    }



}

I then modified your code to accept an array of strings, and only pass the first element to your Response Constructor.

Notice the changes in your code in the signature and return statement.

@GetMapping("/test")

    public String search(@RequestParam String value) {

        System.out.println(value);

        return new Response(value[0]);

    }

With your test, you can now explore using a List type for your request param and quickly see how the behaviour has changed.

answered Nov 21 at 5:21

Lachlan Lindsay

197113

answered Nov 21 at 5:21

Lachlan Lindsay

197113

answered Nov 21 at 5:21

Lachlan Lindsay

197113

answered Nov 21 at 5:21

Lachlan Lindsay

197113

add a comment |

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