dataTable 发送数据使用springMVC接收自动封装失败的解决办法

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dataTable 发送数据使用springMVC接收自动封装失败的解决办法

1、封装dataTable传到后台的数据的封装Bean
2、自定义SpringMVC参数解析器

封装Bean

封装主Bean：SearchCondition

package com.boleprint.util.entiy.datatable;import java.io.Serializable;import java.util.ArrayList;import java.util.List;public class SearchCondition implements Serializable{    private static final long serialVersionUID = 1L;    private int draw;    private List<Column> columns = new ArrayList<Column>();    private List<Order> orders = new ArrayList<Order>();    private int start = 0;    private Search search = new Search();    /**     * setter 及getter     */}

封装属性Bean：Column

package com.boleprint.util.entiy.datatable;import java.io.Serializable;public class Column implements Serializable{    private static final long serialVersionUID = 1L;    private String data;    private String name;    private boolean searchable;    private boolean orderable;    private Search search = new Search();    /**     * setter 及getter     */}

封装属性Bean：Order

package com.boleprint.util.entiy.datatable;import java.io.Serializable;public class Order implements Serializable{    private static final long serialVersionUID = 1L;    private int column;    private String dir;    /**     * setter 及getter     */

封装属性Bean：Search

package com.boleprint.util.entiy.datatable;import java.io.Serializable;public class Search implements Serializable{    private static final long serialVersionUID = 1L;    private String value;    private boolean regex;    /**     * setter 及getter     */}

自定义SpringMVC参数解析器（详细方法自己了解）

首先创建一个类实现HandlerMethodArgumentResolver接口

package com.boleprint.web.controller.resolver;import java.util.Set;import java.util.regex.Matcher;import java.util.regex.Pattern;import org.springframework.core.MethodParameter;import org.springframework.web.bind.support.WebDataBinderFactory;import org.springframework.web.context.request.NativeWebRequest;import org.springframework.web.method.support.HandlerMethodArgumentResolver;import org.springframework.web.method.support.ModelAndViewContainer;import com.boleprint.annotation.IsSearchCondition;import com.boleprint.util.StringUtil;import com.boleprint.util.entiy.datatable.Column;import com.boleprint.util.entiy.datatable.Order;import com.boleprint.util.entiy.datatable.SearchCondition;public class SeacherConditionArgumentResolver implements HandlerMethodArgumentResolver {    @Override    public SearchCondition resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {        Set<String> parameterNames = webRequest.getParameterMap().keySet();        SearchCondition condition = new SearchCondition();        for (String name : parameterNames) {            /*             * 设置SearchCondition 的columns属性;             */            if(name.startsWith("columns")){                int index = Integer.parseInt(name.substring(8, 9));                String secendName = name.substring(getCharPosition(name, "\\[", 2)+1, getCharPosition(name, "\\]", 2));                try {                    if(condition.getColumns().get(index)==null) condition.getColumns().add(new Column());                }catch(IndexOutOfBoundsException e){                    condition.getColumns().add(new Column());                }                switch (secendName) {                case "data":                    condition.getColumns().get(index).setData(webRequest.getParameter(name));                    break;                case "name":                    condition.getColumns().get(index).setName(webRequest.getParameter(name));                    break;                case "searchable":                    condition.getColumns().get(index).setSearchable(Boolean.valueOf(webRequest.getParameter(name)));                    break;                case "orderable":                    condition.getColumns().get(index).setOrderable(Boolean.valueOf(webRequest.getParameter(name)));                    break;                case "search":                    String thirdName = name.substring(getCharPosition(name, "\\[", 3)+1, getCharPosition(name, "\\]", 3));                    switch (thirdName) {                    case "regex":                        condition.getColumns().get(index).getSearch().setRegex(Boolean.valueOf(webRequest.getParameter(name)));                        break;                    case "value":                        String c = webRequest.getParameter(name);                        condition.getColumns().get(index).getSearch().setValue(c);                        break;                    }                    break;                }            }            /*             * 设置SearchCondition 的columns属性;             */            else if(name.startsWith("order")){                int index = Integer.parseInt(name.substring(6, 7));                String secendName = name.substring(getCharPosition(name, "\\[", 2)+1, getCharPosition(name, "\\]", 2));                try {                    if(condition.getOrders().get(index)==null) condition.getOrders().add(new Order());                }catch(IndexOutOfBoundsException e){                    condition.getOrders().add(new Order());                }                switch (secendName) {                case "column":                    condition.getOrders().get(index).setColumn(Integer.parseInt(webRequest.getParameter(name)));                    break;                case "dir":                    condition.getOrders().get(index).setDir(webRequest.getParameter(name));                    break;                }            }            /*             * 设置SearchCondition 的draw属性;             */            else if(name.equalsIgnoreCase("draw")){                if(StringUtil.checkNull(webRequest.getParameter("draw"))) condition.setDraw(Integer.parseInt(webRequest.getParameter("draw")));                else return null;            }            /*             * 设置SearchCondition 的length属性;             */            else if(name.equalsIgnoreCase("length")){                if(StringUtil.checkNull(webRequest.getParameter("length"))) condition.setLength(Integer.parseInt(webRequest.getParameter("length")));            }            /*             * 设置SearchCondition 的start属性;             */            else if(name.equalsIgnoreCase("start")){                if(StringUtil.checkNull(webRequest.getParameter("start"))) condition.setStart(Integer.parseInt(webRequest.getParameter("start")));            }            /*             * 设置SearchCondition 的start属性;             */            else if(name.equalsIgnoreCase("search")){                String secendName = name.substring(getCharPosition(name, "\\[", 2)+1, getCharPosition(name, "\\]", 2));                switch (secendName) {                case "regex":                    condition.getSearch().setRegex(Boolean.valueOf(webRequest.getParameter(name)));                    break;                case "value":                    condition.getSearch().setValue(webRequest.getParameter(name));                    break;                }            }        }        return condition;    }    @Override    public boolean supportsParameter(MethodParameter parameter) {        return parameter.hasParameterAnnotation(IsSearchCondition.class);    }    /**     * 获取某段字符串在某个字符串中某次出现的位置     * @param string 被查找的字符串     * @param regex 需要查找的正则表达式     * @param index 出现的次数     * @return 需要查找的字符串/字符出现的位置     */    private int getCharPosition(String string, String regex, int index) {        Matcher slashMatcher = Pattern.compile(regex).matcher(string);        int mIdx = 0;        while (slashMatcher.find()) {            mIdx++;            if (mIdx == index) break;        }        return slashMatcher.start();    }}

自定义注解类。让supportsParameter解析，目的是让是有添加了这个注解的类才能进入到这个参数解析器，并没有别的用处，所以类里面可以什么都不写。

package com.boleprint.annotation;import static java.lang.annotation.ElementType.ANNOTATION_TYPE;import static java.lang.annotation.ElementType.CONSTRUCTOR;import static java.lang.annotation.ElementType.FIELD;import static java.lang.annotation.ElementType.LOCAL_VARIABLE;import static java.lang.annotation.ElementType.METHOD;import static java.lang.annotation.ElementType.PACKAGE;import static java.lang.annotation.ElementType.PARAMETER;import static java.lang.annotation.ElementType.TYPE;import static java.lang.annotation.ElementType.TYPE_PARAMETER;import static java.lang.annotation.ElementType.TYPE_USE;import static java.lang.annotation.RetentionPolicy.RUNTIME;import java.lang.annotation.Documented;import java.lang.annotation.Retention;import java.lang.annotation.Target;@Documented@Retention(RUNTIME)@Target({ TYPE, FIELD, METHOD, PARAMETER, CONSTRUCTOR, LOCAL_VARIABLE, ANNOTATION_TYPE, PACKAGE, TYPE_PARAMETER, TYPE_USE })public @interface IsSearchCondition {}

配置SpringMVC的配置文件

    <mvc:annotation-driven>        <mvc:argument-resolvers>            <bean class="com.boleprint.web.controller.resolver.SeacherConditionArgumentResolver"/>        </mvc:argument-resolvers>    </mvc:annotation-driven>

Controller的实现方式

@RequestMapping(value="quote/data/ChoosePaper")    public @ResponseBody ResponsePage<CustomerSeachDTO> getSearchCustomer(@IsSearchCondition SearchCondition condition){        return null;    }

至此所有后台配置全部结束，前台部分没有任何改变，也不需要有任何改变。

代码本人亲测可以成功，但是也许会有Bug等不全面的地方。希望朋友可以指出，一起进步。

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