java - 启动 opencsv 时出现问题

Question

我正在使用 eclipse 作为我的 Java 编辑器(我是 eclipse 的初学者)，我想使用这个 CSV 解析库 打开 csv: http://opencsv.sourceforge.net/

所以我下载了这些文件并在 eclipse 中创建了一个新的 Java 项目。这些下载的文件中有一个示例，当我想启动它时，我收到一条错误消息:“启动错误:选择不包含主类型”

代码有一个 main 方法，所以我不知道该怎么做。然后我用谷歌搜索了我的问题并阅读了将示例文件移动到我所做的 src 文件夹中的建议。现在，当我在控制台中运行此代码时，我收到另一条错误消息:“CSVReader 无法解析为类型”

这是我要运行的代码

import com.opencsv.CSVReader;
import com.opencsv.CSVWriter;

import java.io.FileReader;
import java.io.IOException;
import java.io.StringWriter;
import java.util.List;

/**
 * Copyright 2005 Bytecode Pty Ltd.
 * <p/>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
    implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
public class AddressExample {

private static final String ADDRESS_FILE = "examples/addresses.csv";

public static void main(String[] args) throws IOException {

    CSVReader reader = new CSVReader(new FileReader(ADDRESS_FILE));
    String[] nextLine;
    while ((nextLine = reader.readNext()) != null) {
        System.out.println("Name: [" + nextLine[0] + "]\nAddress: [" + nextLine[1] + "]\nEmail: [" + nextLine[2] + "]");
    }

    // Try writing it back out as CSV to the console
    CSVReader reader2 = new CSVReader(new FileReader(ADDRESS_FILE));
    List<String[]> allElements = reader2.readAll();
    StringWriter sw = new StringWriter();
    CSVWriter writer = new CSVWriter(sw);
    writer.writeAll(allElements);

    System.out.println("\n\nGenerated CSV File:\n\n");
    System.out.println(sw.toString());


}
}

Answer 1

从这里下载库 opencsv

并将它们导入到您的 java 项目中。您可以找到步骤here