How to retrieve value from linkedhashmap using iterators in Struts2…?

Question

I have function which return LinkedHashMap in Struts2 and i just came to know that we cannot use for loop in struts2 instead we have to use Iterators, and am new to struts

Answer 1

You should iterate over List of Map instead of Map of List

---

Example :

@Getter
private List<Map> listOfMap = Lists.newArrayList();

public String execute() {

    while (resultset.next()) {
        final Map<String, String> map = Maps.newHashMap();

        map.put("manufId", resultset.getString("manufacturer_id"));
        map.put("manufLogo", resultset.getString("SUPPLIER_LOGO_IMAGE"));
        map.put("manufName", resultset.getString("MANUFACTURER_NAME"));
        map.put("manufURL", resultset.getString("MANUFACTURER_URL"));

        listOfMap.add(map);
    }

    return SUCCESS;
}

<s:iterator value="listOfMap">
  ${manufId}
  ${manufLogo}
  ${manufName}
  ${manufURL}
</s:iterator>

The listOfMap also can use as a dataSource for Struts2 JasperReports Plugin.

Answer 2

You can use s:iterator over a map.

<s:iterator value="topSuppliers">
  <s:property value="key" />: <s:iterator value="value" status="status"><s:property /><s:if test="!#status.last">,</s:if></s:iterator>
</s:iterator>

This iterates over the map using Map.Entry and then iterates over your value list using another iterator and iterator status to add "," unless it's the last entry.