JSP文件代码如下<%@ page contentType="text/html;charset=GB2312"%>
<html>
<head><title>读取文件</title></head>
<body bgcolor="white">
<jsp:useBean id="file_reader" class="fileReader" scope="session"/>
<jsp:setProperty name="file_reader" property="fileName" /><% if (file_reader.getFileName() != "") { %>文件[ '<% out.println(file_reader.getFileName()); %>']内容 : <br><br><% if (file_reader.getContent() != null) { %><Form>
<TEXTAREA rows=<%= file_reader.getRows() %> cols=<%= file_reader.getColumns() %> id=textarea1 name=textarea1><% out.println(file_reader.getContent()); %></TEXTAREA>
</Form><% } else { %>
<% out.println(file_reader.getErrorMessage()); %><% } %><br><br><% file_reader.reset(); %>
<a href="fileReader.jsp">读取另外的文件</a>
<% } else { %>读取文件内容的例子。
<form method=get>
输入文件名: <input type=text name=fileName>
<input type=submit value="读取文件内容">
</form><% } %></font>
</body>
</html>
错误代码如下
org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 5 in the jsp file: /test/fileReader.jsp
fileReader cannot be resolved to a type
2: <html>
3: <head><title>读取文件</title></head>
4: <body bgcolor="white">
5: <jsp:useBean id="file_reader" class="fileReader" scope="session"/>
6: <jsp:setProperty name="file_reader" property="fileName" />
7:
8: <% if (file_reader.getFileName() != "") { %>
An error occurred at line: 5 in the jsp file: /test/fileReader.jsp
fileReader cannot be resolved to a type
2: <html>
3: <head><title>读取文件</title></head>
4: <body bgcolor="white">
5: <jsp:useBean id="file_reader" class="fileReader" scope="session"/>
6: <jsp:setProperty name="file_reader" property="fileName" />
7:
8: <% if (file_reader.getFileName() != "") { %>
An error occurred at line: 5 in the jsp file: /test/fileReader.jsp
fileReader cannot be resolved to a type
2: <html>
3: <head><title>读取文件</title></head>
4: <body bgcolor="white">
5: <jsp:useBean id="file_reader" class="fileReader" scope="session"/>
6: <jsp:setProperty name="file_reader" property="fileName" />
7:
8: <% if (file_reader.getFileName() != "") { %>
请高手指点一下,为什么不可以运行,
<html>
<head><title>读取文件</title></head>
<body bgcolor="white">
<jsp:useBean id="file_reader" class="fileReader" scope="session"/>
<jsp:setProperty name="file_reader" property="fileName" /><% if (file_reader.getFileName() != "") { %>文件[ '<% out.println(file_reader.getFileName()); %>']内容 : <br><br><% if (file_reader.getContent() != null) { %><Form>
<TEXTAREA rows=<%= file_reader.getRows() %> cols=<%= file_reader.getColumns() %> id=textarea1 name=textarea1><% out.println(file_reader.getContent()); %></TEXTAREA>
</Form><% } else { %>
<% out.println(file_reader.getErrorMessage()); %><% } %><br><br><% file_reader.reset(); %>
<a href="fileReader.jsp">读取另外的文件</a>
<% } else { %>读取文件内容的例子。
<form method=get>
输入文件名: <input type=text name=fileName>
<input type=submit value="读取文件内容">
</form><% } %></font>
</body>
</html>
错误代码如下
org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 5 in the jsp file: /test/fileReader.jsp
fileReader cannot be resolved to a type
2: <html>
3: <head><title>读取文件</title></head>
4: <body bgcolor="white">
5: <jsp:useBean id="file_reader" class="fileReader" scope="session"/>
6: <jsp:setProperty name="file_reader" property="fileName" />
7:
8: <% if (file_reader.getFileName() != "") { %>
An error occurred at line: 5 in the jsp file: /test/fileReader.jsp
fileReader cannot be resolved to a type
2: <html>
3: <head><title>读取文件</title></head>
4: <body bgcolor="white">
5: <jsp:useBean id="file_reader" class="fileReader" scope="session"/>
6: <jsp:setProperty name="file_reader" property="fileName" />
7:
8: <% if (file_reader.getFileName() != "") { %>
An error occurred at line: 5 in the jsp file: /test/fileReader.jsp
fileReader cannot be resolved to a type
2: <html>
3: <head><title>读取文件</title></head>
4: <body bgcolor="white">
5: <jsp:useBean id="file_reader" class="fileReader" scope="session"/>
6: <jsp:setProperty name="file_reader" property="fileName" />
7:
8: <% if (file_reader.getFileName() != "") { %>
请高手指点一下,为什么不可以运行,
import java.awt.event.*;
import java.util.*;
/**
* 该文件实现的Bean类是一个提供基本的读取文件功能的Bean类
*/
public class fileReader {
private String fileName;
private String errorMessage;
private int columns;
private int rowCount;
/**
* fileReader的构造函数
*/
public fileReader() {
reset();
}
/**
* 重置所有的变量
*/
public void reset() {
fileName = "";
errorMessage = "";
columns = 0;
rowCount = 0;
}
/**
* 设置错误信息
*/
public void setErrorMessage(String errorMessage) {
this.errorMessage = errorMessage;
}
/**
* 返回错误信息
*/
public String getErrorMessage() {
return errorMessage;
}
/**
* 返回文件名
*/
public String getFileName() {
return fileName;
}
/**
* 设置文件名
*/
public void setFileName(String fileName) {
this.fileName = fileName;
}
/**
* 返回文件内容的行数
*/
public int getRows() {
return rowCount;
}
/**
* 返回文件中最大一行的列数
*/
public int getColumns() {
return columns;
}
/**
* 将文件内容返回到一个字符串中,
* 如果存在错误信息,则返回null值
*/
public String getContent() {
String content = "";
File file = new File(fileName);
if (!file.exists()) {
setErrorMessage("Error: The file '" + fileName + "' does not exists.");
return null;
}
else if (file != null) {
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
String inLine = reader.readLine();
while (inLine != null) {
if (inLine.length() + 1 > columns)
columns = inLine.length() + 1;
content += (inLine + System.getProperty("line.separator"));
inLine = reader.readLine();
rowCount++;
}
return content;
}
catch (IOException e) {
setErrorMessage("Error reading the file: " + e.getMessage());
return null;
}
}
else {
setErrorMessage("Unknown error!");
return null;
}
}
}
把你写的bean导如到.jsp页面
你那个fileReader在包里么