处理 spring 请求中的数据 table 请求参数

Question

我想在我的项目中使用 jquery 数据table。我能够点击 ajax 查询并获得 json 响应以在 table 中显示数据。但是为了使用服务器端搜索和排序，我需要接受datatable发送的请求参数。请求参数格式如下

draw:1
columns[0][data]:firstName
columns[0][name]:
columns[0][searchable]:true
columns[0][orderable]:true
columns[0][search][value]:
columns[0][search][regex]:false
columns[1][data]:lastName
columns[1][name]:
columns[1][searchable]:true
columns[1][orderable]:true
columns[1][search][value]:
columns[1][search][regex]:false
columns[2][data]:age
columns[2][name]:
columns[2][searchable]:true
columns[2][orderable]:true
columns[2][search][value]:
columns[2][search][regex]:false
order[0][column]:0
order[0][dir]:asc
start:0
length:10
search[value]:
search[regex]:false

我想创建一个DTO对象来接受这种请求参数。我创建了以下 DTO。

public class DataTableRequestDTO {

    private int draw;
    private List<HashMap<String, String>> columns;
    private List<HashMap<String, String>> order;
    private int start;
    private int length;

    public int getDraw() {
        return draw;
    }
    public void setDraw(int draw) {
        this.draw = draw;
    }
    public List<HashMap<String, String>> getColumns() {
        return columns;
    }
    public void setColumns(List<HashMap<String, String>> columns) {
        this.columns = columns;
    }
    public List<HashMap<String, String>> getOrder() {
        return order;
    }
    public void setOrder(List<HashMap<String, String>> order) {
        this.order = order;
    }
    public int getStart() {
        return start;
    }
    public void setStart(int start) {
        this.start = start;
    }
    public int getLength() {
        return length;
    }
    public void setLength(int length) {
        this.length = length;
    }

}

但是当我点击 ajax url 时出现以下错误

org.springframework.beans.InvalidPropertyException: Invalid property 'columns[0][search][regex]' of bean class [demo.objects.DataTableRequestDTO]: Property referenced in indexed property path 'columns[0][search][regex]' is neither an array nor a List nor a Map; returned value was [false]
    at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1058)
    at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:927)
    at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:95)
    at org.springframework.validation.DataBinder.applyPropertyValues(DataBinder.java:749)
    at org.springframework.validation.DataBinder.doBind(DataBinder.java:645)
    at org.springframework.web.bind.WebDataBinder.doBind(WebDataBinder.java:189)
    at org.springframework.web.bind.ServletRequestDataBinder.bind(ServletRequestDataBinder.java:106)
    at org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor.bindRequestParameters(ServletModelAttributeMethodProcessor.java:150)
    at org.springframework.web.method.annotation.ModelAttributeMethodProcessor.resolveArgument(ModelAttributeMethodProcessor.java:110)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:77)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:129)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:291)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:102)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.autoconfigure.MetricFilterAutoConfiguration$MetricsFilter.doFilterInternal(MetricFilterAutoConfiguration.java:90)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659)
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

字符串不是处理列[0][搜索][正则表达式] 的有效数据类型。请问如何在DTO对象中处理此类请求。

谢谢

Answer 1

我在 this post 上找到了答案。我添加了

$('#myTable').DataTable({
    serverSide: true,
    ajax: {
        "url": "url",
        "data": function(data) {
            planify(data);  
        } 
    }
});
function planify(data) {
    for (var i = 0; i < data.columns.length; i++) {
        column = data.columns[i];
        column.searchRegex = column.search.regex;
        column.searchValue = column.search.value;
        delete(column.search);
    }
}

在 javascript 中转换为

columns[0][search][value]=myvalue
columns[0][search][regex]=false

到

columns[0][searchValue]=myvalue
columns[0][searchRegex]=false

现在我可以像这样处理这些请求对象

public class DataTableRequestDTO {

    private int draw;
    private List<HashMap<String, String>> columns;
    private List<HashMap<String, String>> order;
    private int start;
    private int length;

    public int getDraw() {
        return draw;
    }
    public void setDraw(int draw) {
        this.draw = draw;
    }
    public List<HashMap<String, String>> getColumns() {
        return columns;
    }
    public void setColumns(List<HashMap<String, String>> columns) {
        this.columns = columns;
    }
    public List<HashMap<String, String>> getOrder() {
        return order;
    }
    public void setOrder(List<HashMap<String, String>> order) {
        this.order = order;
    }
    public int getStart() {
        return start;
    }
    public void setStart(int start) {
        this.start = start;
    }
    public int getLength() {
        return length;
    }
    public void setLength(int length) {
        this.length = length;
    }
}

谢谢大家..

处理 spring 请求中的数据 table 请求参数

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