DataTables与Spring MVC、Spring Data JPA的集成

1、如何接收参数，这个代码是参考老外的代码。不过核心逻辑老外写的太差了。

public class DataTablesInput {

	/**
	 * Draw counter. This is used by DataTables to ensure that the Ajax returns
	 * from server-side processing requests are drawn in sequence by DataTables
	 * (Ajax requests are asynchronous and thus can return out of sequence).
	 * This is used as part of the draw return parameter (see below).
	 */
	@NotNull
	@Min(0)
	private Integer draw;

	/**
	 * Paging first record indicator. This is the start point in the current
	 * data set (0 index based - i.e. 0 is the first record).
	 */
	@NotNull
	@Min(0)
	private Integer start;

	/**
	 * Number of records that the table can display in the current draw. It is
	 * expected that the number of records returned will be equal to this
	 * number, unless the server has fewer records to return. Note that this can
	 * be -1 to indicate that all records should be returned (although that
	 * negates any benefits of server-side processing!)
	 */
	@NotNull
	@Min(-1)
	private Integer length;

	/**
	 * Global search parameter.
	 */
	@NotNull
	private SearchParameter search;

	/**
	 * Order parameter
	 */
	@NotEmpty
	private List<OrderParameter> order;

	/**
	 * Per-column search parameter
	 */
	@NotEmpty
	private List<ColumnParameter> columns;

	public DataTablesInput() {
		this.search = new SearchParameter();
		this.order = new ArrayList<OrderParameter>();
		this.columns = new ArrayList<ColumnParameter>();
	}

	public Integer getDraw() {
		return draw;
	}

	public void setDraw(Integer draw) {
		this.draw = draw;
	}

	public Integer getStart() {
		return start;
	}

	public void setStart(Integer start) {
		this.start = start;
	}

	public Integer getLength() {
		return length;
	}

	public void setLength(Integer length) {
		this.length = length;
	}

	public SearchParameter getSearch() {
		return search;
	}

	public void setSearch(SearchParameter search) {
		this.search = search;
	}

	public List<OrderParameter> getOrder() {
		return order;
	}

	public void setOrder(List<OrderParameter> order) {
		this.order = order;
	}

	public List<ColumnParameter> getColumns() {
		return columns;
	}

	public void setColumns(List<ColumnParameter> columns) {
		this.columns = columns;
	}

	public List<ColumnParameter> addColumn(ColumnParameter column) {
		if(Collections3.isEmpty(columns)){
			columns = new ArrayList<ColumnParameter>();
		}
		columns.add(column);
		return columns;
	}
}

2、如何输出

public class DataTablesOutput<T> {

	/**
	 * The draw counter that this object is a response to - from the draw
	 * parameter sent as part of the data request. Note that it is strongly
	 * recommended for security reasons that you cast this parameter to an
	 * integer, rather than simply echoing back to the client what it sent in
	 * the draw parameter, in order to prevent Cross Site Scripting (XSS)
	 * attacks.
	 */
	@JsonView(View.class)
	private Integer draw;

	/**
	 * Total records, before filtering (i.e. the total number of records in the
	 * database)
	 */
	@JsonView(View.class)
	private Long recordsTotal;

	/**
	 * Total records, after filtering (i.e. the total number of records after
	 * filtering has been applied - not just the number of records being
	 * returned for this page of data).
	 */
	@JsonView(View.class)
	private Long recordsFiltered;

	/**
	 * The data to be displayed in the table. This is an array of data source
	 * objects, one for each row, which will be used by DataTables. Note that
	 * this parameter's name can be changed using the ajaxDT option's dataSrc
	 * property.
	 */
	@JsonView(View.class)
	private List<Map<String, String>> data;

	private List<T> sourceData;

	/**
	 * Optional: If an error occurs during the running of the server-side
	 * processing script, you can inform the user of this error by passing back
	 * the error message to be displayed using this parameter. Do not include if
	 * there is no error.
	 */
	@JsonView(View.class)
	private String error;

	public interface View {
	}

	public Integer getDraw() {
		return draw;
	}

	public void setDraw(Integer draw) {
		this.draw = draw;
	}

	public Long getRecordsTotal() {
		return recordsTotal;
	}

	public void setRecordsTotal(Long recordsTotal) {
		this.recordsTotal = recordsTotal;
	}

	public Long getRecordsFiltered() {
		return recordsFiltered;
	}

	public void setRecordsFiltered(Long recordsFiltered) {
		this.recordsFiltered = recordsFiltered;
	}

	public List<Map<String, String>> getData() {
		return data;
	}

	public void setData(List<Map<String, String>> data) {
		this.data = data;
	}

	public List<T> getSourceData() {
		return sourceData;
	}

	public void setSourceData(List<T> sourceData) {
		this.sourceData = sourceData;
	}

	public String getError() {
		return error;
	}

	public void setError(String error) {
		this.error = error;
	}

}

3、中间过程，通过另外一个查询的参数Searchable，可以百度‘开涛的博客’，将DataTablesInput传来的参数赋值到searchable来，包括分页和排序等，放入Service查询出来之后，再格局DataTablesInput的columns中表单需要展现的字段取出，最后封装到DataTableOutput中去。