Question

我正在编写一个用Java自动完成的小程序。它如下所示。

的index.html 使用Jquery和Java在Java Web应用程序中自动完成 JSON

</head>
<body>
    <div class="header">
        <h3>Autocomplete in java web application using Jquery and JSON</h3>
    </div>
    <br />
    <br />
    <div class="search-container">
        <div class="ui-widget">
            <input type="text" id="search" name="search" class="search" />
        </div>
    </div>
</body>
</html>

autocompleter.js

$(document).ready(function() {
    $(function() {
        $("#search").autocomplete({
            source : function(request, response) {
                $.ajax({
                    url : "Controller",
                    type : "GET",
                    data : {
                        term : request.term
                    },
                    dataType : "json",
                    success : function(data) {
                        response(data);
                    }
                });
            }
        });
    });
});

DataDao.java

package com.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;

public class DataDao {
    private Connection connection;

    public DataDao() throws Exception {
        connection = DBUtility.getConnection();
    }

    public ArrayList<String> getFrameWork(String frameWork) {
        ArrayList<String> list = new ArrayList<String>();
        PreparedStatement ps = null;
        String data;
        try {
            ps = connection.prepareStatement("select * from StatusTable WHERE [case owner]  LIKE ?");
            ps.setString(1, frameWork + "%");
            ResultSet rs = ps.executeQuery();
            while (rs.next()) {
                data = rs.getString("case Owner");
                list.add(data);
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        return list;
    }
}

DBUtility.java

package com.dao;

import java.sql.Connection;
import java.sql.DriverManager;

public class DBUtility {
    private static Connection connection = null;

    public static Connection getConnection() throws Exception {
        if (connection != null)
            return connection;
        else {
            // Store the database URL in a string
            String userName = "sa";
            String password = "T!ger123";
            String url = "jdbc:sqlserver://U0138039-TPD-A\\SQLEXPRESS;DatabaseName=TEST";

            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

            // set the url, username and password for the databse
            connection = DriverManager.getConnection(url, userName, password);
            return connection;
        }
    }
}

Controller.java

import java.io.IOException;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.dao.DataDao;
import com.google.gson.Gson;

public class Controller extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        response.setContentType("application/json");
        try {
            String term = request.getParameter("term");
            System.out.println("Data from ajax call " + term);

            DataDao dataDao = new DataDao();
            ArrayList<String> list = dataDao.getFrameWork(term);

            String searchList = new Gson().toJson(list);
            response.getWriter().write(searchList);
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
    }
}

当我运行此程序时，在文本框中，没有看到自动建议下拉列表。

我不确定rs.getString("case Owner");是否导致问题（引号中的空格）。

此外我不确定，因为只有一个类型的名称（请参阅下图），下拉列表不会出现。

请在上述假设中纠正我。

当我运行select * from StatusTable时，我在下面的图像中得到以下输出。

我很抱歉红色通过，这些有点保密。

请让我知道我哪里出错了，我该如何解决这个问题。

AutoComplete无法在jsp中运行

0 个答案: