java - jsp頁面中無法顯示圖片

1 圖片已經上傳，資料庫也獲得正確的圖片地址
2 在頁面上也可以查看到正確的圖片地址
3 重新啟動一下tomcat 圖片就可以顯示

這是什麼問題

前端頁面

<body bgcolor="white">

<%
    response.setHeader("Pragma", "No-Cache");
    response.setHeader("Cache-Control", "No-Cache");
    response.setDateHeader("Expires", 0);
    BookDao bookDao = new BookDao();
    List<Books> list = new ArrayList<>();
    List item = new ArrayList();
    list = bookDao.listBookInfo();
%>

<%
    for (Books books : list
            ) {
%>
<table>
    <tr>
        <td rowspan="4"><img alt="图片不存在" src="<%=books.getImgPath()%>" width="130px" height="180px"></td>
    </tr>
    <tr>
        <td><%=books.getBookname() + "( 书号：" + books.getBookid() + ")"%>
        </td>
    </tr>
    <tr>
        <td><%=books.getWriter()%>
        </td>
        <td><%=books.getCbs()%>
        </td>
    </tr>
    <tr>
        <td><%=books.getItems()%>
        </td>

    </tr>
</table>

<hr>
<%
    }
%>

Dao

###

    public List<Books> listBookInfo() {
        List<Books> list = new ArrayList();
        try {

            String sql = "SELECT * FROM books WHERE isLend=1";
            ps = conn.prepareStatement(sql);
            rs = ps.executeQuery();
            while (rs.next()) {
                Books books = new Books();
                books.setBookid(rs.getLong("bookId"));
                books.setBookname(rs.getString("bookName"));
                books.setCbs(rs.getString("cbs"));
                books.setWriter(rs.getString("writer"));
                books.setIslend(rs.getLong("isLend"));
                books.setItems(rs.getString("items"));
                books.setDate(rs.getTimestamp("date"));
                books.setImgPath(rs.getString("imgpath"));
                list.add(books);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return list;
    }

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java - jsp頁面中無法顯示圖片

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