Java 如何向用户显示电影列表,让用户选择一部电影并将其保存在表中

Java 如何向用户显示电影列表,让用户选择一部电影并将其保存在表中,java,jsf,Java,Jsf,我有一个小的web应用程序,用户可以在其中预订电影。我创建了JSF页面,并通过这种方式显示数据库中可用的电影列表: <ui:composition template="/template.xhtml"> <ui:define name="title"> <h:outputText value="#{bundleMovie.ListMovieTitle}"></h:outp

我有一个小的web应用程序,用户可以在其中预订电影。我创建了JSF页面,并通过这种方式显示数据库中可用的电影列表:

<ui:composition template="/template.xhtml">
    <ui:define name="title">
        <h:outputText value="#{bundleMovie.ListMovieTitle}"></h:outputText>
    </ui:define>
    <ui:define name="body">
        <h:form styleClass="jsfcrud_list_form">
            <h:panelGroup id="messagePanel" layout="block">
                <h:messages errorStyle="color: red" infoStyle="color: green" layout="table"/>
            </h:panelGroup>
            <h:outputText escape="false" value="#{bundleMovie.ListMovieEmpty}" rendered="#{movieController.items.rowCount == 0}"/>
            <h:panelGroup rendered="#{movieController.items.rowCount > 0}">
                <h:outputText value="#{movieController.pagination.pageFirstItem + 1}..#{movieController.pagination.pageLastItem + 1}/#{movieController.pagination.itemsCount}"/>&nbsp;
                <h:commandLink action="#{movieController.previous}" value="#{bundleMovie.Previous} #{movieController.pagination.pageSize}" rendered="#{movieController.pagination.hasPreviousPage}"/>&nbsp;
                <h:commandLink action="#{movieController.next}" value="#{bundleMovie.Next} #{movieController.pagination.pageSize}" rendered="#{movieController.pagination.hasNextPage}"/>&nbsp;
                <h:dataTable value="#{movieController.items}" var="item" border="0" cellpadding="2" cellspacing="0" rowClasses="jsfcrud_odd_row,jsfcrud_even_row" rules="all" style="border:solid 1px">
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="#{bundleMovie.ListMovieTitle_movieId}"/>
                        </f:facet>
                        <h:outputText value="#{item.movieId}"/>
                    </h:column>
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="#{bundleMovie.ListMovieTitle_movieName}"/>
                        </f:facet>
                        <h:outputText value="#{item.movieName}"/>
                    </h:column>
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="#{bundleMovie.ListMovieTitle_movieGenre}"/>
                        </f:facet>
                        <h:outputText value="#{item.movieGenre}"/>
                    </h:column>
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="#{bundleMovie.ListMovieTitle_movieRating}"/>
                        </f:facet>
                        <h:outputText value="#{item.movieRating}"/>
                    </h:column>
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="#{bundleMovie.ListMovieTitle_movieDate}"/>
                        </f:facet>
                        <h:outputText value="#{item.movieDate}"/>
                    </h:column>
                    <h:column>
                        <f:facet name="header">
                            <h:outputText value="&nbsp;"/>
                        </f:facet>
                        <h:commandLink action="#{movieController.bookAMovie(movie)}" value="Book" />
                    </h:column>
                </h:dataTable>
            </h:panelGroup>
            <br />
           <h:link outcome="/faces/adminIndex.jsp" value="Return to home page"/>
            <br />
            <br />
        </h:form>
    </ui:define>
</ui:composition>

我不知道如何解决这个问题。不一定要这样,如果有人能以任何方式提供帮助,这对我来说都是合适的。只有向用户显示数据库中的电影,用户可以选择一部电影,并且他的选择存储在一个新表中。

关于Java代码,下面的代码工作正常。 我能运行它

请确保您在项目中添加了适当的MySQL库,并确保用户名/密码正确。现在您提供了空密码

因为您没有提供任何错误堆栈。我无法直接对此发表评论

    class Sample3 {
    public static void main(String[] args) throws ClassNotFoundException {
        bookAMovie(Movie.builder().movieGenre("Comic").movieRating(8).movieName("Movie1").build());
    }

    public static int bookAMovie(Movie movie) throws ClassNotFoundException {
        String INSERT_USERS_SQL = "INSERT INTO bookedmovie"
                + "  (bookedmoviename, bookedmoviegenre, bookedmovierating) VALUES "
                + " (?, ?, ?);";

        int result = 0;

        Class.forName("com.mysql.jdbc.Driver");

        try (Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?useSSL=false", "root", "PASSWORD");
             // Step 2:Create a statement using connection object
             PreparedStatement preparedStatement = connection.prepareStatement(INSERT_USERS_SQL)) {

            preparedStatement.setString(1, movie.getMovieName());
            preparedStatement.setString(2, movie.getMovieGenre());
            preparedStatement.setDouble(3, movie.getMovieRating());

            System.out.println(preparedStatement);
            // Step 3: Execute the query or update query
            result = preparedStatement.executeUpdate();

            Statement statement=connection.createStatement();
            ResultSet resultSet=statement.executeQuery("SELECT * FROM sample.bookedmovie");
            List<Map<String, String>> mapList = getList(resultSet);
            System.out.println(mapList);

        } catch (SQLException e) {
            // process sql exception
            e.printStackTrace();
        }
        return result;
    }

    public static List<Map<String, String>> getList(ResultSet resultSet) throws SQLException {
        List<Map<String, String>> mapList = new ArrayList<>();
        ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
        int columnNumber = resultSetMetaData.getColumnCount();
        while (resultSet.next()) {
            Map<String, String> map = new HashMap<>();
            int count = 1;
            while (count <= columnNumber) {
                String columnName = resultSetMetaData.getColumnName(count);
                map.put(columnName, resultSet.getString(columnName));
                count++;
            }
            mapList.add(map);
        }
        return mapList;
    }

}

@Data
@Builder
class Movie {
    public String movieName;
    public String movieGenre;
    public double movieRating;
}
类样本3{
公共静态void main(字符串[]args)引发ClassNotFoundException{
bookAMovie(Movie.builder().movieGenre(“漫画”).movieRating(8.movieName(“Movie1”).build());
}
publicstaticintbookamovie(电影)抛出ClassNotFoundException{
字符串INSERT\u USERS\u SQL=“插入bookedmovie”
+(bookedmoviename、bookedMoviegnre、bookedMovieng)值
+ " (?, ?, ?);";
int结果=0;
Class.forName(“com.mysql.jdbc.Driver”);
try(Connection=DriverManager.getConnection(“jdbc:mysql://localhost:3306/sample?useSSL=false“,”根“,”密码“);
//步骤2:使用连接对象创建语句
PreparedStatement PreparedStatement=connection.prepareStatement(插入用户\ SQL)){
preparedStatement.setString(1,movie.getMovieName());
preparedStatement.setString(2,movie.getMovieGenre());
setDouble(3,movie.getMovieRating());
系统输出打印LN(编制报表);
//步骤3:执行查询或更新查询
结果=preparedStatement.executeUpdate();
语句Statement=connection.createStatement();
ResultSet ResultSet=statement.executeQuery(“SELECT*FROM sample.bookedmovie”);
List mapList=getList(resultSet);
System.out.println(映射列表);
}捕获(SQLE异常){
//处理sql异常
e、 printStackTrace();
}
返回结果;
}
公共静态列表getList(ResultSet ResultSet)引发SQLException{
List mapList=new ArrayList();
ResultSetMetaData ResultSetMetaData=resultSet.getMetaData();
int columnNumber=resultSetMetaData.getColumnCount();
while(resultSet.next()){
Map Map=newhashmap();
整数计数=1;

虽然(我明白这一点,我已经有了注册页面,一切都很好,但是这部分用户显示了关于电影的数据,我无法将数据保存在数据库Baaaaad教程中,非常糟糕,不仅从JSF的角度来看,而且从通用java/服务等角度来看。从未使用过javapoint教程als。在控制器、服务等中分解代码,创建单元测试等。从这里开始:。99.9%的jsf和数据库相关问题只与一个相关。请参阅创建密码的步骤。我的密码只是空的,这就是原因。非常感谢您的帮助,但不幸的是,这并不是我所需要的(Movie.builder().movieGenre(“漫画”).movieRating(8.movieName(“Movie1”).build())`您在这里添加电影,而我会自动从电影表中添加电影,然后将其显示给用户。是的,但在保存之前。您如何显示它?在我的问题中,代码的第一部分实际上从数据库中获取电影表并显示它。这是通过自动生成的JSF页面代码完成的。抱歉,但我恐怕无法显示我把它送给你。xd@mezar是的,但在Java中,您需要得到那个电影对象。不管我写了什么,它都是为独立应用程序编写的。
    class Sample3 {
    public static void main(String[] args) throws ClassNotFoundException {
        bookAMovie(Movie.builder().movieGenre("Comic").movieRating(8).movieName("Movie1").build());
    }

    public static int bookAMovie(Movie movie) throws ClassNotFoundException {
        String INSERT_USERS_SQL = "INSERT INTO bookedmovie"
                + "  (bookedmoviename, bookedmoviegenre, bookedmovierating) VALUES "
                + " (?, ?, ?);";

        int result = 0;

        Class.forName("com.mysql.jdbc.Driver");

        try (Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?useSSL=false", "root", "PASSWORD");
             // Step 2:Create a statement using connection object
             PreparedStatement preparedStatement = connection.prepareStatement(INSERT_USERS_SQL)) {

            preparedStatement.setString(1, movie.getMovieName());
            preparedStatement.setString(2, movie.getMovieGenre());
            preparedStatement.setDouble(3, movie.getMovieRating());

            System.out.println(preparedStatement);
            // Step 3: Execute the query or update query
            result = preparedStatement.executeUpdate();

            Statement statement=connection.createStatement();
            ResultSet resultSet=statement.executeQuery("SELECT * FROM sample.bookedmovie");
            List<Map<String, String>> mapList = getList(resultSet);
            System.out.println(mapList);

        } catch (SQLException e) {
            // process sql exception
            e.printStackTrace();
        }
        return result;
    }

    public static List<Map<String, String>> getList(ResultSet resultSet) throws SQLException {
        List<Map<String, String>> mapList = new ArrayList<>();
        ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
        int columnNumber = resultSetMetaData.getColumnCount();
        while (resultSet.next()) {
            Map<String, String> map = new HashMap<>();
            int count = 1;
            while (count <= columnNumber) {
                String columnName = resultSetMetaData.getColumnName(count);
                map.put(columnName, resultSet.getString(columnName));
                count++;
            }
            mapList.add(map);
        }
        return mapList;
    }

}

@Data
@Builder
class Movie {
    public String movieName;
    public String movieGenre;
    public double movieRating;
}