Zzzz/Book-management-system
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维护入口

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Zzzz
2026-04-27 23:38:19 +08:00
parent 4155d5b1ea
commit 63738f108a
21 changed files with 1009 additions and 8 deletions
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src/main/java/com/mzh/library/controller/BookManagementServlet.java
+178
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@@ -27,6 +27,8 @@ import javax.servlet.http.HttpSession;
public class BookManagementServlet extends HttpServlet {
private static final String MANAGE_JSP = "/WEB-INF/jsp/books/manage.jsp";
private static final String FORM_JSP = "/WEB-INF/jsp/books/form.jsp";
private static final String CATEGORY_MANAGE_JSP = "/WEB-INF/jsp/books/categories.jsp";
private static final String CATEGORY_FORM_JSP = "/WEB-INF/jsp/books/category-form.jsp";
private static final String UNAUTHORIZED_JSP = "/WEB-INF/jsp/auth/unauthorized.jsp";
private static final String FLASH_SUCCESS = "flashSuccess";
private static final String FLASH_ERROR = "flashError";
@@ -50,6 +52,19 @@ public class BookManagementServlet extends HttpServlet {
showEditForm(request, response);
return;
}
if ("/book-categories".equals(path)) {
showCategoryList(request, response);
return;
}
if ("/book-categories/new".equals(path)) {
renderCategoryForm(request, response, "Create category", "/book-categories", new BookCategory(),
Collections.emptyMap(), Collections.emptyMap(), null);
return;
}
if ("/book-categories/edit".equals(path)) {
showEditCategoryForm(request, response);
return;
}
if (!"/books".equals(path)) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
@@ -73,6 +88,18 @@ public class BookManagementServlet extends HttpServlet {
deleteBook(request, response);
return;
}
if ("/book-categories".equals(path)) {
createCategory(request, response);
return;
}
if ("/book-categories/update".equals(path)) {
updateCategory(request, response);
return;
}
if ("/book-categories/delete".equals(path)) {
deleteCategory(request, response);
return;
}
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
@@ -116,6 +143,32 @@ public class BookManagementServlet extends HttpServlet {
Collections.emptyMap(), Collections.emptyMap(), null);
}
private void showCategoryList(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
applyFlash(request);
ServiceResult<List<BookCategory>> result = bookService.listCategories();
request.setAttribute("categories", result.isSuccessful() ? result.getData() : Collections.emptyList());
if (!result.isSuccessful()) {
request.setAttribute("errorMessage", result.getMessage());
}
request.getRequestDispatcher(CATEGORY_MANAGE_JSP).forward(request, response);
}
private void showEditCategoryForm(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
long id = requiredLong(request.getParameter("id"), -1L);
ServiceResult<Optional<BookCategory>> result = bookService.findCategory(id);
if (!result.isSuccessful() || !result.getData().isPresent()) {
flashError(request, result.isSuccessful() ? "Category was not found." : result.getMessage());
response.sendRedirect(request.getContextPath() + "/book-categories");
return;
}
renderCategoryForm(request, response, "Edit category", "/book-categories/update", result.getData().get(),
Collections.emptyMap(), Collections.emptyMap(), null);
}
private void createBook(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
BookForm form = readBookForm(request, false);
if (!form.getErrors().isEmpty()) {
@@ -167,6 +220,60 @@ public class BookManagementServlet extends HttpServlet {
response.sendRedirect(request.getContextPath() + "/books");
}
private void createCategory(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
CategoryForm form = readCategoryForm(request, false);
if (!form.getErrors().isEmpty()) {
renderCategoryForm(request, response, "Create category", "/book-categories", form.getCategory(),
form.getValues(), form.getErrors(), "Please correct the highlighted category fields.");
return;
}
ServiceResult<Long> result = bookService.createCategory(currentUser(request), form.getCategory());
if (!result.isSuccessful()) {
handleCategoryFormFailure(request, response, "Create category", "/book-categories", form, result);
return;
}
flashSuccess(request, result.getMessage());
response.sendRedirect(request.getContextPath() + "/book-categories");
}
private void updateCategory(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
CategoryForm form = readCategoryForm(request, true);
if (!form.getErrors().isEmpty()) {
renderCategoryForm(request, response, "Edit category", "/book-categories/update", form.getCategory(),
form.getValues(), form.getErrors(), "Please correct the highlighted category fields.");
return;
}
ServiceResult<Void> result = bookService.updateCategory(currentUser(request), form.getCategory());
if (!result.isSuccessful()) {
handleCategoryFormFailure(request, response, "Edit category", "/book-categories/update", form, result);
return;
}
flashSuccess(request, result.getMessage());
response.sendRedirect(request.getContextPath() + "/book-categories");
}
private void deleteCategory(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
long id = requiredLong(request.getParameter("id"), -1L);
ServiceResult<Void> result = bookService.deleteCategory(currentUser(request), id);
if (isPermissionDenied(result)) {
forwardDenied(request, response, result.getMessage());
return;
}
if (result.isSuccessful()) {
flashSuccess(request, result.getMessage());
} else {
flashError(request, result.getMessage());
}
response.sendRedirect(request.getContextPath() + "/book-categories");
}
private void handleFormFailure(HttpServletRequest request, HttpServletResponse response, String title,
String action, BookForm form, ServiceResult<?> result)
throws ServletException, IOException {
@@ -178,6 +285,17 @@ public class BookManagementServlet extends HttpServlet {
result.getMessage());
}
private void handleCategoryFormFailure(HttpServletRequest request, HttpServletResponse response, String title,
String action, CategoryForm form, ServiceResult<?> result)
throws ServletException, IOException {
if (isPermissionDenied(result)) {
forwardDenied(request, response, result.getMessage());
return;
}
renderCategoryForm(request, response, title, action, form.getCategory(), form.getValues(),
result.getErrors(), result.getMessage());
}
private void renderForm(HttpServletRequest request, HttpServletResponse response, String title, String action,
Book book, Map<String, String> formValues, Map<String, String> errors, String errorMessage)
throws ServletException, IOException {
@@ -199,6 +317,21 @@ public class BookManagementServlet extends HttpServlet {
request.getRequestDispatcher(FORM_JSP).forward(request, response);
}
private void renderCategoryForm(HttpServletRequest request, HttpServletResponse response, String title,
String action, BookCategory category, Map<String, String> formValues,
Map<String, String> errors, String errorMessage)
throws ServletException, IOException {
request.setAttribute("formTitle", title);
request.setAttribute("formAction", action);
request.setAttribute("category", category);
request.setAttribute("formValues", formValues);
request.setAttribute("errors", errors);
if (errorMessage != null && !errorMessage.isEmpty()) {
request.setAttribute("errorMessage", errorMessage);
}
request.getRequestDispatcher(CATEGORY_FORM_JSP).forward(request, response);
}
private BookForm readBookForm(HttpServletRequest request, boolean requireId) {
Map<String, String> values = formValues(request);
Map<String, String> errors = new LinkedHashMap<>();
@@ -237,6 +370,27 @@ public class BookManagementServlet extends HttpServlet {
return values;
}
private CategoryForm readCategoryForm(HttpServletRequest request, boolean requireId) {
Map<String, String> values = categoryFormValues(request);
Map<String, String> errors = new LinkedHashMap<>();
BookCategory category = new BookCategory();
if (requireId) {
category.setId(parseLong(values.get("id"), "id", "Select a valid category.", errors));
}
category.setName(values.get("name"));
category.setDescription(values.get("description"));
return new CategoryForm(category, values, errors);
}
private Map<String, String> categoryFormValues(HttpServletRequest request) {
Map<String, String> values = new LinkedHashMap<>();
values.put("id", trim(request.getParameter("id")));
values.put("name", trim(request.getParameter("name")));
values.put("description", trim(request.getParameter("description")));
return values;
}
private BookSearchCriteria searchCriteria(HttpServletRequest request) {
return new BookSearchCriteria(
request.getParameter("identifier"),
@@ -368,4 +522,28 @@ public class BookManagementServlet extends HttpServlet {
return errors;
}
}
private static final class CategoryForm {
private final BookCategory category;
private final Map<String, String> values;
private final Map<String, String> errors;
private CategoryForm(BookCategory category, Map<String, String> values, Map<String, String> errors) {
this.category = category;
this.values = values;
this.errors = errors;
}
private BookCategory getCategory() {
return category;
}
private Map<String, String> getValues() {
return values;
}
private Map<String, String> getErrors() {
return errors;
}
}
}