404，莫名解决了，好像是因为直接启动了servlet没有的get方法？添加了filter的init方法，错误点在adminFilter

src/filter/AdminFilter.java

@@ -20,6 +20,10 @@ import javax.servlet.http.HttpSession;
  */
 public class AdminFilter implements Filter {
 
+	public void init(FilterConfig filterConfig) throws ServletException {
+
+    }
+	
 	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
 		HttpServletRequest req = (HttpServletRequest) request;
 		HttpSession session = req.getSession();

src/servlet/admin/BookList.java

@@ -38,7 +38,6 @@ public class BookList extends HttpServlet {
 		String condition = (String) req.getParameter("condition");
 		String conditionValue = (String) req.getParameter("conditionValue");
 		Map where = new HashMap<String, String>();
-    	//System.out.println(condition +"" +conditionValue);
 		// 传输数据过滤
 		if(page == null) {
 			page = "1";
@@ -74,7 +73,6 @@ public class BookList extends HttpServlet {
 		
 		PrintWriter out = resp.getWriter();
 		out.print(json.toString());
-    	//out.print("{\"code\":0,\"msg\":\"\",\"count\":10,\"data\":[{\"id\":10000,\"name\":\"夏洛特的烦恼\",\"library_name\":\"南图\",\"sort_id\":\"言情\",\"position_id\":\"sdf\",\"state\":\"借出\",\"descript\":\"好看\",\"operate\":\"234\"},{\"id\":10000,\"name\":\"夏洛特的烦恼\",\"library_name\":\"南图\",\"sort_id\":\"言情\",\"position_id\":\"sdf\",\"state\":\"借出\",\"descript\":\"好看\",\"operate\":\"234\"},{\"id\":10000,\"name\":\"夏洛特的烦恼\",\"library_name\":\"南图\",\"sort_id\":\"言情\",\"position_id\":\"sdf\",\"state\":\"借出\",\"descript\":\"好看\",\"operate\":\"234\"},{\"id\":10010,\"name\":\"夏洛特的烦恼\",\"library_name\":\"南图\",\"sort_id\":\"言情\",\"position_id\":\"sdf\",\"state\":\"借出\",\"descript\":\"好看\",\"operate\":\"234\"}]}");
 	}
 	
     @Override