org.apache.jasper.JasperException:无法为 JSP 编译类:

新手上路,请多包涵

您好我正在尝试用 tomcat 编译一个简单的 jsp 文件,但我一直收到此错误消息

org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 13 in the jsp file: /WebContent/test.jsp
Member cannot be resolved to a type
10: <body>
11: <%
12:     //MyBatisDao myDao = new MyBatisDao();
13:     List<Member> list; // = myDao.func("test");
14:     //out.println("Result list= " + list);
15: %>
16: </body>

test.jsp(在 Webcontent)

 <%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="pageNumber.*, java.util.*, java.io.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
    List<Member> list;
%>
</body>
</html>

会员.java

 package pageNumber;
public class Member {
 private String id;
 private String pw;
 private int point;
 private int lvl;

 public Member() {}
 public Member(String id, String pw, int point, int lvl) {
  this.id = id;
  this.pw = pw;
  this.point = point;
  this.lvl = lvl;
 }

 public String getId() { return id; }
 public void setId(String id) { this.id = id; }
 public String getPw() { return pw; }
 public void setPw(String pw) { this.pw = pw; }
 public int getPoint() { return point; }
 public void setPoint(int point) { this.point = point; }
 public int getLvl() { return lvl; }
 public void setLvl(int lvl) { this.lvl = lvl; }
 public String toString() {
  return "ID= " + id + ", PW= " + pw + ", POINT= " + point + ", LVL= " + lvl;
 }

}

据我所知,我遇到这个问题是因为我的 tomcat 找不到类文件,所以我将我的类文件放在

  • build/classes/pageNumber(其中 pageNumber 是我的包名)
  • WEB-INF/类/页码
  • tomcat\work\Catalina\localhost_\org\apache\jsp\pageNumber

但都没有成功。有什么帮助吗?


编辑:在我更改我的进口申报后

<%@ page import="pageNumber.*, java.util.*, java.io.*" %>

<%@ page import="java.util.List, pageNumber.Member" %>

它实际上给了我一种新的错误类型:

 org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 15 in the generated java file
Only a type can be imported. pageNumber.Member resolves to a package

An error occurred at line: 12 in the jsp file: /WebContent/test.jsp
Member cannot be resolved to a type
9: </head>
10: <body>
11: <%
12:     List<Member> list; // = myDao.func("test");
13: %>
14: </body>
15: </html>

原文由 Martin Yang 发布,翻译遵循 CC BY-SA 4.0 许可协议

阅读 1.5k
1 个回答

这可能是由 jar 冲突引起的。删除 servlet/WEB-INF/ 目录下的 servlet-api.jar,%Tomcat home%/lib 已经有这个库。

原文由 metalcrash 发布,翻译遵循 CC BY-SA 3.0 许可协议

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