Question

我是java和mongodb的新手，我没有看到如何解决这个问题，我有一个集合：

get("/pages/:page", (request, response) -> {
        String page = request.params(":page");
        if(page.equals("forms")){
            UserDAO userDao = new UserDAO(Connection.getInstance().getDataStore());
            HashMap<String,Object> map = new HashMap<String,Object>();
            map.put("users", userDao.AllUsers());
            return new ModelAndView(map, page+".ftl");
        }else{
            return new ModelAndView(null, page+".ftl");
        }
    }, new FreeMarkerEngine());

}

java代码：

public List<User> AllUsers() throws Exception{      
    return this.find().asList();
}

我的AllUsers（）函数

public List<String> getDomains() {
    return domains;
}

pojo clas，域名

<#list users as data>
<tr class="odd gradeX">
    <td>${data._id}</td>
    <td>${data.active?string('yes', 'no')}</td>
    <td>${data.group}</td>
    <#assign x = ''>
    <#assign keys = data?keys>
    <#list keys as key>
      <#assign x = x+','+key>
    </#list>
    <td>${x}</td>
</tr>

和freemarker代码

#include <Rcpp.h>
using namespace Rcpp;

// [[Rcpp::export]]
List DataFrameExample(const DataFrame & DF) {

    // access each column by name
    IntegerVector a = DF["a"];
    CharacterVector b = DF["b"];
    DateVector c = DF["c"];

    // do something
    a[2] = 42;
    b[1] = "foo";
    c[0] = c[0] + 7; // move up a week

    // create a new data frame
    DataFrame NDF = DataFrame::create(Named("a")=a,
                                      Named("b")=b,
                                      Named("c")=c);

    // and return old and new in list
    return List::create(Named("origDataFrame") = DF,
                        Named("newDataFrame") = NDF);
}

问题是我无法访问域名

的值

我希望你有人可以帮助我

提前谢谢

Answer 1

如果要列出用户域，可以使用join：

<td>${data.domains?join(",")}</td>

在Freemarker中迭代hashmap＆＃39; s mongodb结果

1 个答案: