How to Use REST-style URLs in SpringMVC, springmvcrest

How to Use REST-style URLs in SpringMVC, springmvcrest
How to Use REST url1.url in SpringMVC:

Get:/restUrl/{id}

Post:/restUrl

Delete:/restUrl/{id}

Put:/restUrl

2. controller Syntax: 1) target method of the GET request:

    @RequestMapping(value="/restUrl/{id}", method=RequestMethod.GET)    public String get(Map<String, Object> map, @PathVariable("id") Integer id){        Object obj = new Object();        map.put("obj", obj);        return "success";       }

Note:

1. method = RequestMethod must be added to the @ RequestMapping annotation. GET indicates that this is a target method for processing get requests 2. use the @ PathVariable ("id") Integer id annotation to retrieve the {id} value in the url and assign the value to the input parameter id2 modified by the annotation) Target method of the post request:

    @RequestMapping(value="/restUrl", method=RequestMethod.POST)    public String post(Object obj){        System.out.println(obj);        return "success";    }

Note:

1. method = RequestMethod must be added to the @ RequestMapping annotation. POST indicates that this is a target method for processing post requests 2. the parameter {id} is not required in the url of the post request. 3) Target method of the delete request:

    @RequestMapping(value="/restUrl/{id}", method=RequestMethod.DELETE)    public String delete(@PathVariable("id") Integerid){        System.out.println(id);        return "success";    }

 

Note:

1. method = RequestMethod must be added to the @ RequestMapping annotation. DELETE, indicating that this is a target method for processing the delete request 2. the url must contain the parameter {id} 4) Target method of the put request:

    @RequestMapping(value="/restUrl", method=RequestMethod.PUT)    public String put(Object obj){        System.out.println(obj);        return "success";    }

Note:1. method = RequestMethod must be added to the @ RequestMapping annotation. PUT, indicating that this is a target method for processing put requests 2. the url does not need to contain the parameter {id} 3. if you need to use @ ModelAttribute to perform some operations before modification (for example, to query an object in the database, use the put target method ), please refer to my other blog "@ ModelAttribute annotation Usage Details" 3. link syntax on the jsp page: 1) get request:

<a href="${pageContext.request.contextPath}/user/restUrl/{id}">get user</a>

Note:

1. Here {id} cannot be written directly to {id}, but you want to assign a value dynamically. 2) post request:

<form action="${pageContext.request.contextPath }/restUrl" method="post" >    name:<input type="text" name="username"><br>    password:<input type="password" name="password"><br>    <input type="submit" value="submit"></form>

Note:

1. Because hyperlinks are get requests, Form 2 must be used for post-style url requests. The form submission method must be method = post3) delete request:

<a class="delete_href" href="${pageContext.request.contextPath }/restUrl/{id}">remove</a>

<form id="delete_form" action="" method="post">    <input type="hidden" name="_method" value="DELETE"></form>

$(function(){    $(".delete_href").on("click", function(){var href = $(this).attr("href");        $("#delete_form").attr("action", href).submit();        return false;    })})

Note:

1. since Hyperlinks can only send get requests, if we need to send a delete request, we must submit a form to convert the form post request to a delete request. add a hidden field <input type = "hidden" name = "_ method" value = "DELETE"> to the form, converts a form request to a delete request when it is submitted. when clicking a hyperlink using js, the form is actually submitted. However, before using JavaScript, introduce the jquery file 4) put request:

<form action="${pageContext.request.contextPath }/restUrl" method="post" >    <input type="hidden" name="_method" value="PUT">    <input type="hidden" name="id" value="${id }">    name:<input type="text" name="username"><br>    password:<input type="password" name="password"><br>    <input type="submit" value="submit"></form>

Note:

1. Similar to the delete request, we need a hidden field <input type = "hidden" name = "_ method" value = "PUT"> to convert the post request to a put request.