大家好我是java和jsp的新手，说实话，我不懂json。但我有一些要求，我必须从数据库中提取数据并在jsp页面上显示。但标准是我必须使用Bootstrap Data Table为什么我使用它，因为它提供了很多灵活性
分页
过滤
排序
多列排序
单个列过滤器
我见过bootstrap示例，但是我的jsp中出现错误，任何人都可以帮我解决这个问题。
这是我的jsp页面
<%@page import="org.codehaus.jettison.json.JSONObject"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import ="java.util.*" %>
<%@ page import="com.varun.DataBase"%>
<%@ page import="java.sql.*" %>
<%@ page import="org.json.*"%>
<%@ page import ="net.sf.json.JSONArray" %>
<!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=ISO-8859-1">
<title>DataTable</title>
</head>
<body>
<h1>Lets display the data from database using dataTabel</h1>
<%
String[] cols = { "id","engine", "browser", "platform", "version", "grade" };
String table = "ajax";
JSONObject result = new JSONObject();
JSONArray array = new JSONArray();
int amount = 10;
int start = 0;
int echo = 0;
int col = 0;
int id;
String engine = "";
String browser = "";
String platform = "";
String version = "";
String grade = "";
String dir = "asc";
String sStart = request.getParameter("iDisplayStart");
String sAmount = request.getParameter("iDisplayLength");
String sEcho = request.getParameter("sEcho");
String sCol = request.getParameter("iSortCol_0");
String sdir = request.getParameter("sSortDir_0");
engine = request.getParameter("sSearch_0");
browser = request.getParameter("sSearch_1");
platform = request.getParameter("sSearch_2");
version = request.getParameter("sSearch_3");
grade = request.getParameter("sSearch_4");
List<String> sArray = new ArrayList<String>();
if (!engine.equals("")) {
String sEngine = " engine like '%" + engine + "%'";
sArray.add(sEngine);
//or combine the above two steps as:
//sArray.add(" engine like '%" + engine + "%'");
//the same as followings
}
if (!browser.equals("")) {
String sBrowser = " browser like '%" + browser + "%'";
sArray.add(sBrowser);
}
if (!platform.equals("")) {
String sPlatform = " platform like '%" + platform + "%'";
sArray.add(sPlatform);
}
if (!version.equals("")) {
String sVersion = " version like '%" + version + "%'";
sArray.add(sVersion);
}
if (!grade.equals("")) {
String sGrade = " grade like '%" + grade + "%'";
sArray.add(sGrade);
}
String individualSearch = "";
if(sArray.size()==1){
individualSearch = sArray.get(0);
}else if(sArray.size()>1){
for(int i=0;i<sArray.size()-1;i++){
individualSearch += sArray.get(i)+ " and ";
}
individualSearch += sArray.get(sArray.size()-1);
}
if (sStart != null) {
start = Integer.parseInt(sStart);
if (start < 0)
start = 0;
}
if (sAmount != null) {
amount = Integer.parseInt(sAmount);
if (amount < 10 || amount > 100)
amount = 10;
}
if (sEcho != null) {
echo = Integer.parseInt(sEcho);
}
if (sCol != null) {
col = Integer.parseInt(sCol);
if (col < 0 || col > 5)
col = 0;
}
if (sdir != null) {
if (!sdir.equals("asc"))
dir = "desc";
}
String colName = cols[col];
int total = 0;
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","admin");
try {
String sql = "SELECT count(*) FROM "+table;
PreparedStatement ps = conn.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
if(rs.next()){
total = rs.getInt("count(*)");
}
}catch(Exception e){
}
int totalAfterFilter = total;
//result.put("sEcho",echo);
try {
String searchSQL = "";
String sql = "SELECT * FROM "+table;
String searchTerm = request.getParameter("sSearch");
String globeSearch = " where (engine like '%"+searchTerm+"%'"
+ " or browser like '%"+searchTerm+"%'"
+ " or platform like '%"+searchTerm+"%'"
+ " or version like '%"+searchTerm+"%'"
+ " or grade like '%"+searchTerm+"%')";
if(searchTerm!=""&&individualSearch!=""){
searchSQL = globeSearch + " and " + individualSearch;
}
else if(individualSearch!=""){
searchSQL = " where " + individualSearch;
}else if(searchTerm!=""){
searchSQL=globeSearch;
}
sql += searchSQL;
sql += " order by " + colName + " " + dir;
sql += " limit " + start + ", " + amount;
PreparedStatement ps = conn.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
while (rs.next()) {
JSONArray ja = new JSONArray();
//net.sf.json.JSONArray ja = new net.sf.json.JSONArray();
ja.add(rs.getInt("id"));
ja.add(rs.getString("engine"));
ja.add(rs.getString("browser"));
ja.add(rs.getString("platform"));
ja.add(rs.getString("version"));
ja.add(rs.getString("grade"));
array.add(ja);
}
String sql2 = "SELECT count(*) FROM "+table;
if (searchTerm != "") {
sql2 += searchSQL;
PreparedStatement ps2 = conn.prepareStatement(sql2);
ResultSet rs2 = ps2.executeQuery();
if (rs2.next()) {
totalAfterFilter = rs2.getInt("count(*)");
}
}
result.put("iTotalRecords", total);
result.put("iTotalDisplayRecords", totalAfterFilter);
result.put("aaData", array);
response.setContentType("application/json");
response.setHeader("Cache-Control", "no-store");
out.print(result);
conn.close();
} catch (Exception e) {
}
%>
</body>
</html>
我得到的例外：
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 11 in the generated java file
Only a type can be imported. net.sf.json.JSONArray resolves to a package
An error occurred at line: 25 in the jsp file: /dataTable.jsp
JSONArray cannot be resolved to a type
22: String table = "ajax";
23:
24: JSONObject result = new JSONObject();
25: JSONArray array = new JSONArray();
26:
27:
28: int amount = 10;
An error occurred at line: 25 in the jsp file: /dataTable.jsp
JSONArray cannot be resolved to a type
22: String table = "ajax";
23:
24: JSONObject result = new JSONObject();
25: JSONArray array = new JSONArray();
26:
27:
28: int amount = 10;
An error occurred at line: 157 in the jsp file: /dataTable.jsp
JSONArray cannot be resolved to a type
154: PreparedStatement ps = conn.prepareStatement(sql);
155: ResultSet rs = ps.executeQuery();
156: while (rs.next()) {
157: JSONArray ja = new JSONArray();
158: //net.sf.json.JSONArray ja = new net.sf.json.JSONArray();
159:
160: ja.add(rs.getInt("id"));
An error occurred at line: 157 in the jsp file: /dataTable.jsp
JSONArray cannot be resolved to a type
154: PreparedStatement ps = conn.prepareStatement(sql);
155: ResultSet rs = ps.executeQuery();
156: while (rs.next()) {
157: JSONArray ja = new JSONArray();
158: //net.sf.json.JSONArray ja = new net.sf.json.JSONArray();
159:
160: ja.add(rs.getInt("id"));
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:335)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:313)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:300)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:312)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
note The full stack trace of the root cause is available in the JBoss Web/2.1.3.GA logs.
JBoss Web/2.1.3.GA