Question

我在Intellij中有一个简单的JavaEE Web应用程序项目，我需要读取src.main.resources文件夹中的文件。以下是我的项目的截图。

我需要在getData()函数中返回 data.txt 文件的上下文。当前方法除了将“Error”返回到index.jsp并抛出NoSuchFileException之外什么都不做。我使用以下路径测试但结果是相同的。

"data.txt"
"/data.txt"
"src/main/resources/data.txt"
"/src/main/resources/data.txt"

非常感谢任何帮助。

Answer 1

System.out.println("get data");
    String newMessage = "error";
    String fileName = "abc.txt";
    try {
        newMessage = new String(Files.readAllBytes(Paths.get("C:\\Users\\kalingay\\IdeaProjects\\SpringMVCCrudApp\\src\\main\\resources\\" + fileName)), "UTF-8");
        System.out.println("out--->" + newMessage) ;
    } catch (Exception e) {
        System.out.println("Exception-->" + e);
    }

Answer 2

 System.out.println("get data");
    StringBuilder out = new StringBuilder();
    try {
        InputStream inputStream = HelloWorld.class.getResourceAsStream("kky.txt");
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
        String line;
        while ((line = reader.readLine()) != null) {
            out.append(line);
        }
        System.out.println(out.toString());
        reader.close();
        System.out.println("out--->" + out);
    } catch (Exception e) {
        System.out.println("Exception-->" + e);
    }

确定HelloWorld类和kky.txt在同一个文件夹中... :) :)这会帮助你:) :)

使用相对路径.... :) :)试试这个

Answer 3

首先，正确创建java项目结构，将HelloWorld.java放在src / main / java下。

将您的资源放在/ src / main / resources下。

使用以下内容加载资源：

public class Student
{
    private int studentID;
    private String firstName;
    private String lastName;
    private String email;
    private int age;
    private int[] grades;

    public Student (int studentID, String firstName, String lastName, String email, int age, int grades[]) 
    {
    setStudentID(studentID);
    setFirstName(firstName);
    setLastName(lastName);
    setEmail(email);
    setAge(age);
    setGrades(grades);

    }

    public void setStudentID(int studentID) {
        this.studentID = studentID;
    }

    public void setFirstName(String firstName) 
    {
        this.firstName = firstName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setGrades(int[] grades) {
        this.grades = grades;
    }

    public int getStudentID() {
       return studentID;
    }

    public String getFirstName() {
       return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public String getFullName() {
        return firstName + lastName;
    }

    public String getEmail() {
        return email;
    }

    public int getAge() {
        return age;
    }

    public int[] getGrades() {
        return grades;
    }

    public int getAverageGrade() {
        int averageGrade = 0;
            for (int grade : grades) {
                averageGrade += grade;
            }
        return averageGrade;
    }
    public void print() {
        System.out.println(
        "Student Name:\t" + getFullName() + "\n " + 
        "Student ID:\t" + getStudentID() + "\n" + 
        "Email:\t" + getEmail() + "\n" + 
        "Age:\t" + getAge() + "\n" +
        "Average Grade:\t" + getAverageGrade()
        );

    }


}

Answer 4

在@ D00de的帮助下，我得到了一个完整的解决方案，如下所示。

首先要做的是重新组织项目，如图所示。课程应该放在src.main.java.*中，资源应该放在src.main.resources.*

中

然后要访问该文件，请使用以下代码。

URI uri = HelloWorld.class.getClassLoader().getResource("metadata/data.txt").toURI();
out = String.valueOf(Files.readAllLines(Paths.get(uri)));

读取使用tomcat

4 个答案: