http://nurkiewicz.blogspot.com/2011/07/poor-mans-crud-jqgrid-rest-ajax-and.html

BookController1.java

@Controller
@RequestMapping(value = "/book")
public class BookController {

  private final Map<Integer, Book> books = new ConcurrentSkipListMap<Integer, Book>();

  @RequestMapping(value = "/{id}", method = GET)
  public @ResponseBody Book read(@PathVariable("id") int id) {
    return books.get(id);
  }

  @RequestMapping(method = GET)
  public @ResponseBody Page<Book> listBooks(
      @RequestParam(value = "page", required = false, defaultValue = "1") int page,
      @RequestParam(value = "max", required = false, defaultValue = "20") int max) {
    final ArrayList<Book> booksList = new ArrayList<Book>(books.values());
    final int startIdx = (page - 1) * max;
    final int endIdx = Math.min(startIdx + max, books.size());
    return new Page<Book>(booksList.subList(startIdx, endIdx), page, max, books.size());
  }
}

BookController2.java

@Controller
@RequestMapping(value = "/book")
public class BookController {

  private final Map<Integer, Book> books = new ConcurrentSkipListMap<Integer, Book>();

  @RequestMapping(value = "/{id}", method = GET)
  public @ResponseBody Book read(@PathVariable("id") int id) {
    //...
  }

  @RequestMapping(method = GET)
  public
  @ResponseBody
  Page<Book> listBooks(
      @RequestParam(value = "page", required = false, defaultValue = "1") int page,
      @RequestParam(value = "max", required = false, defaultValue = "20") int max) {
    //...
  }

  @RequestMapping(value = "/{id}", method = PUT)
  @ResponseStatus(HttpStatus.NO_CONTENT)
  public void updateBook(@PathVariable("id") int id, @RequestBody Book book) {
    //...
  }

  @RequestMapping(method = POST)
  public ResponseEntity<String> createBook(HttpServletRequest request, @RequestBody Book book) {
    //...
  }

  @RequestMapping(value = "/{id}", method = DELETE)
  @ResponseStatus(HttpStatus.NO_CONTENT)
  public void deleteBook(@PathVariable("id") int id) {
    //...
  }

}

index.html

<table id="grid"></table>
<div id="pager"></div>

jqgrid-defaults.js

$.extend($.jgrid.defaults, {
  datatype: 'json',
  jsonReader : {
    repeatitems:false,
    total: function(result) {
      //Total number of pages
      return Math.ceil(result.total / result.max);
    },
    records: function(result) {
      //Total number of records
      return result.total;
    }
  },
  prmNames: {rows: 'max', search: null},
  height: 'auto',
  viewrecords: true,
  rowList: [10, 20, 50, 100],
  altRows: true,
  loadError: function(xhr, status, error) {
    alert(error);
  }
  });

jqgrid-edit.js

var URL = 'rest/book';
var options = {
  url: URL,
  editurl: URL,
  colModel:[
    {
      name:'id', label: 'ID',
      formatter:'integer',
      width: 40,
      editable: true,
      editoptions: {disabled: true, size:5}
    },
    {
      name:'title',
      label: 'Title',
      width: 300,
      editable: true,
      editrules: {required: true}
    },
    {
      name:'author',
      label: 'Author',
      width: 200,
      editable: true,
      editrules: {required: true}
    },
    {
      name:'cover',
      label: 'Cover',
      hidden: true,
      editable: true,
      edittype: 'select',
      editrules: {edithidden:true},
      editoptions: {
        value: {'PAPERBACK': 'paperback', 'HARDCOVER': 'hardcover', 'DUST_JACKET': 'dust jacket'}
      }
    },
    {
      name:'publishedYear',
      label: 'Published year',
      width: 80,
      align: 'center',
      editable: true,
      editrules: {required: true, integer: true},
      editoptions: {size:5, maxlength: 4}
    },
    {
      name:'available',
      label: 'Available',
      formatter: 'checkbox',
      width: 46,
      align: 'center',
      editable: true,
      edittype: 'checkbox',
      editoptions: {value:"true:false"}
    },
    {
      name:'comments',
      label: 'Comments',
      hidden: true,
      editable: true,
      edittype: 'textarea',
      editrules: {edithidden:true}
    }
  ],
  caption: "Books",
  pager : '#pager',
  height: 'auto'
};
$("#grid")
    .jqGrid(options)
    .navGrid('#pager', {edit:true,add:true,del:true, search: false});

jqgrid1.js

$("#grid")
    .jqGrid({
      url:'rest/book',
      colModel:[
        {name:'id', label: 'ID', formatter:'integer', width: 40},
        {name:'title', label: 'Title', width: 300},
        {name:'author', label: 'Author', width: 200},
        {name:'publishedYear', label: 'Published year', width: 80, align: 'center'},
        {name:'available', label: 'Available', formatter: 'checkbox', width: 46, align: 'center'}
      ],
      caption: "Books",
      pager : '#pager',
      height: 'auto'
    })
    .navGrid('#pager', {edit:false,add:false,del:false, search: false});

Page.java

@XmlRootElement
public class Page<T> {

  private List<T> rows;

  private int page;
  private int max;
  private int total;

  //...

}

post

Content-Type: application/x-www-form-urlencoded in the following format:

id=&title=And+Then+There+Were+None&author=Agatha+Christie&cover=PAPERBACK&publishedYear=1939&available=true&comments=&oper=add

response.js

// $ curl -v -H "Accept: application/json" "http://localhost:8080/books/rest/book?page=1&max=3"

{
    "total":43,
    "max":3,
    "page":1,
    "rows":[
        {
            "id":1,
            "available":true,
            "author":"Charles Dickens",
            "title":"A Tale of Two Cities",
            "publishedYear":1859,
            "cover":"PAPERBACK",
            "comments":null
        },
        {
            "id":2,
            "available":true,
            "author":"J. R. R. Tolkien",
            "title":"The Lord of the Rings",
            "publishedYear":1954,
            "cover":"HARDCOVER",
            "comments":null
        },
        {
            "id":3,
            "available":true,
            "author":"J. R. R. Tolkien",
            "title":"The Hobbit",
            "publishedYear":1937,
            "cover":"PAPERBACK",
            "comments":null
        }
    ]
}

response.xml

<!-- $ curl -v "http://localhost:8080/books/rest/book?page=1&max=2" -->

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<page>
  <max>3</max>
  <page>1</page>
  <rows xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="book">
    <author>Charles Dickens</author>
    <available>true</available>
    <cover>PAPERBACK</cover>
    <id>1</id>
    <publishedYear>1859</publishedYear>
    <title>A Tale of Two Cities</title>
  </rows>
  <rows xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="book">
    <author>J. R. R. Tolkien</author>
    <available>true</available>
    <cover>HARDCOVER</cover>
    <id>2</id>
    <publishedYear>1954</publishedYear>
    <title>The Lord of the Rings</title>
  </rows>
  <rows xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="book">
    <author>J. R. R. Tolkien</author>
    <available>true</available>
    <cover>PAPERBACK</cover>
    <id>3</id>
    <publishedYear>1937</publishedYear>
    <title>The Hobbit</title>
  </rows>
  <total>43</total>
</page>