te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>How to call GWT java function from Javascript? - Stack Overflow

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    你的位置： 首页>programmer>How to call GWT java function from Javascript? - Stack Overflow

    How to call GWT java function from Javascript? - Stack Overflow

    programmeradmin4浏览0评论

    Is it possible to call Java (GWT) methods from Javascript? It is also unclear from documentation. All samples here .html demonstrate calling java functions from JSNI (not JS) functions.

    UPDATE 1

    Here is a Java code:

    public class Test_GoogleWeb_JSNI_02 implements EntryPoint {
/**
 * This is the entry point method.
 */
public void onModuleLoad() {
}

public static void Callee() {
    Window.alert("Callee");
}
}

    Here is caller button samples in html:

    <input type='button' value='Call' onclick='Test02()'>

    And here are some functions I tried and which were not worked:

    <script type="text/javascript">

    function Test01() {
        @.inthemoon.tests.client.Test_GoogleWeb_JSNI_02::Callee()();
    }

    function Test02() {
        .inthemoon.tests.client.Test_GoogleWeb_JSNI_02::Callee()();
    }


</script>

    UPDATE 2

    The following worked.

    Java preparation:

    public void onModuleLoad() {
    Prepare();
}

public static native void Prepare() /*-{
    $doc.calleeRunner = @.inthemoon.tests.client.Test_GoogleWeb_JSNI_02::Callee();
}-*/;

public static void Callee() {
    Window.alert("Callee");
}

    Caller:

    function Test03() {
        document.calleeRunner();
}

    Is there a better way?

    Is it possible to call Java (GWT) methods from Javascript? It is also unclear from documentation. All samples here http://code.google./intl/ru/webtoolkit/doc/latest/DevGuideCodingBasicsJSNI.html demonstrate calling java functions from JSNI (not JS) functions.

    UPDATE 1

    Here is a Java code:

    public class Test_GoogleWeb_JSNI_02 implements EntryPoint {
/**
 * This is the entry point method.
 */
public void onModuleLoad() {
}

public static void Callee() {
    Window.alert("Callee");
}
}

    Here is caller button samples in html:

    <input type='button' value='Call' onclick='Test02()'>

    And here are some functions I tried and which were not worked:

    <script type="text/javascript">

    function Test01() {
        @.inthemoon.tests.client.Test_GoogleWeb_JSNI_02::Callee()();
    }

    function Test02() {
        .inthemoon.tests.client.Test_GoogleWeb_JSNI_02::Callee()();
    }


</script>

    UPDATE 2

    The following worked.

    Java preparation:

    public void onModuleLoad() {
    Prepare();
}

public static native void Prepare() /*-{
    $doc.calleeRunner = @.inthemoon.tests.client.Test_GoogleWeb_JSNI_02::Callee();
}-*/;

public static void Callee() {
    Window.alert("Callee");
}

    Caller:

    function Test03() {
        document.calleeRunner();
}

    Is there a better way?

    • java
    • javascript
    • gwt
    • jsni
    Share Improve this question edited Dec 23, 2011 at 18:31 Dims asked Dec 23, 2011 at 18:03 DimsDims 51.1k130 gold badges358 silver badges651 bronze badges 1
    • can you call a javascrypt method that returns an object? and use that object? – chelo_c Commented Dec 5, 2015 at 5:30
    Add a ment  | 

    1 Answer 1

    Reset to default 13

    your example is not going to work, since you are trying to use JSNI in some external script. If you want to call something from external JS you need to use approach described in this question or use GWT exporter

    UPDATE:

    The safest way to expose the GWT stuff is to wrap invocation in some other function. For example:

        public native void expose()/*-{
    $wnd.exposedMethod = function(param){
         @.my.MyClass::myFunction(*)(param);
    }
}-*/;

    Otherwise you might encounter some strange bugs in production mode=)

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