首先说到easyui,在完成一个easyui的项目的时候，被这个上传图片这一步折腾了很久，我写这个博客就是为了以后不会的时候可以再次看看，好熟悉起来，我这个是用实体类做的项目，下面就展示上传图片的相关代码。
做这个项目是用到了自己写的mvc框架
在servlet里写一个上传图片的方法 到时候页面那边需要调用这个方法 开始SmartUpload要有一个夹包然后进行图片那些设置 里面写到了要先有一个添加图片名字属性那些的方法 然后再有一个根据id修改当前图片地址的方法
/**
* 书籍上传图片
*
* @param req
* @param resp
* @param servletConfig
* @return
*/
public String imageUpload(HttpServletRequest req, HttpServletResponse resp, ServletConfig servletConfig) {
SmartUpload su = new SmartUpload();
try {//下面是设置属性
su.initialize(servletConfig, req, resp);
su.setCharset("utf-8");
su.upload();
su.setAllowedFilesList("jpg,png,gif,jpeg");
su.setDeniedFilesList("jsp,java,html,doc");
su.setMaxFileSize(1024 * 1024 * 800);
String book = req.getParameter("book_id");
File file = su.getFiles().getFile(0);
String path = "imgs/";
if (!file.isMissing()) {
file.setCharset("utf-8");
path += file.getFileName();
file.saveAs(path, File.SAVEAS_VIRTUAL);
}
//然后设置图片表里面的值调用添加方法 等于添加一个图片进去
Doc doc = new Doc();
String file_name = path.substring(path.indexOf("/")+1, path.lastIndexOf("."));
String mime = path.substring(path.lastIndexOf("."));
Random r = new Random();
int image_id = r.nextInt(1000)+1000;
doc.setId(image_id);
doc.setFile_name((file_name+mime).toString().trim());
doc.setMime(mime);
int update = 0;
update = docdao.addDoc(doc);// 在图片表添加当前图片！
if (update > 0) {//如果大于0 就是有值
Book book2 = new Book();
book2.setBook_image(image_id);
book2.setBook_id(Integer.valueOf(book));
int u = bookdao.imageUpload(book2);// 调用根据id修改当前书籍的图片地址！
if (u > 0) {// 如果成功的话，就到XX页面去
return "success";
}
} else {
return "failed";
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {。。。。异常
最后返回 return "failed";这是在mvc框架里的代码
package com.mvc.framework;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public abstract class Action {
protected abstract String execute(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException, NoSuchMethodException, SecurityException, IllegalAccessException,
IllegalArgumentException, InvocationTargetException;
protected abstract String execute(HttpServletRequest req, HttpServletResponse resp, ServletConfig servletConfig)
throws ServletException, IOException, NoSuchMethodException, SecurityException, IllegalAccessException,
IllegalArgumentException, InvocationTargetException;
}
//上面是Action类里代码
//这里是中央控制器的代码
public class ActionServlet extends HttpServlet {
private ConfigModel configModel;
@Override
public void init() throws ServletException {
try {
String xmlPath = this.getInitParameter("aaa");
if (xmlPath == null && "".equals(xmlPath)) {
configModel = ConfigModelFactory.bulidConfig();
} else {
configModel = ConfigModelFactory.bulidConfig(xmlPath);
}
} catch (DocumentException e) {
// TODO Auto-generated catch block
throw new RuntimeException("can not find configModle");
}
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
String url = req.getServletPath();// 请求名
url = url.substring(0, url.lastIndexOf("."));
// Action action = map.get(url);
if (configModel != null) {
ActionModel actionModle = configModel.getaction(url);// 拿到action的path
if (actionModle != null) {
String type = actionModle.getType();// 通过path得到action的全路径名
try {
Action action = (Action) Class.forName(type).newInstance();// action获得全路径名初始化
if (action instanceof ModelDriver) {
ModelDriver modelDriver = (ModelDriver) action;
Object model = modelDriver.getModel(req);
BeanUtils.populate(model, req.getParameterMap());
}
String execute = action.execute(req, resp, this.getServletConfig());//这里传了一个this.getServletConfig() 上传图片用到了
ForwardModel forwardModer = actionModle.getForwardModer(execute);// 拿到forward的name
if (forwardModer != null) {
if (forwardModer.isRedirect()) {
resp.sendRedirect(forwardModer.getPath());
} else {
req.getRequestDispatcher(forwardModer.getPath()).forward(req, resp);
}
} else {
throw new RuntimeException("can not find forwardModer");
}
} catch (InstantiationException e) {
// TODO Auto-generated catch bl。。
//这里是继承Action的类扩展action里方法
package com.mvc.framework;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ActionSupport extends Action{
@Override
protected String execute(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException, NoSuchMethodException, SecurityException, IllegalAccessException,
IllegalArgumentException, InvocationTargetException {
// TODO Auto-generated method stub
String methodName = req.getParameter("methodName");
// if(methodName==null && "".equals(methodName)) {
Map<String, String[]> map = req.getParameterMap();
Set<Entry<String, String[]>> entrySet = map.entrySet();
for (Entry<String, String[]> entry : entrySet) {
String key = entry.getKey();
if(key.contains("method:")) {
methodName=key.replace("method:","");
}
}
// }
Method method = this.getClass().getDeclaredMethod(methodName, HttpServletRequest.class,HttpServletResponse.class);
method.setAccessible(true);
return (String) method.invoke(this,req,resp);
}
//后面这个用到上传图片
@Override
protected String execute(HttpServletRequest req, HttpServletResponse resp, ServletConfig servletConfig)
throws ServletException, IOException, NoSuchMethodException, SecurityException, IllegalAccessException,
IllegalArgumentException, InvocationTargetException {
String methodName = req.getParameter("methodName");
Map<String, String[]> map = req.getParameterMap();
Set<Entry<String, String[]>> entrySet = map.entrySet();
for (Entry<String, String[]> entry : entrySet) {
String key = entry.getKey();
if (key.contains("method:")) {
methodName = key.replace("method:", "");
}
}
Method method = null;
try {
method = this.getClass().getDeclaredMethod(methodName, HttpServletRequest.class, HttpServletResponse.class);
method.setAccessible(true);
return (String) method.invoke(this, req, resp);
} catch (NoSuchMethodException e) {
method = this.getClass().getDeclaredMethod(methodName, HttpServletRequest.class, HttpServletResponse.class, ServletConfig.class);
method.setAccessible(true);
return (String) method.invoke(this, req, resp, servletConfig);
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
现在是jsp页面写一个上传图片的input
<form enctype="multipart/form-data"
action="ddd" id="imageUpload" method="post">
选择图片:<input id="idFile" style="width: 224px" runat="server" name="pic"
onchange="javascript:setImagePreview(this,localImag,preview);"
type="file" /> <br> <br> <br> <input
type="button" value="确定" id="image_update" onclick="imageUu()"><!-- 点击它去掉用那个方法 -->
</form>
//在js页面
toolbar: [{//点击这个toolbar
iconCls: 'icon-add',
text:'上传图片',
handler: function(){
var row= $('#dg').datagrid("getSelected");//拿到这个datagrid选中的那一行
if(row){
$("#dc").dialog('open');//打开dialog框
}else{
alert('请选择一本书');
}
}
}
function imageUu() {//这里就是开始拿到id调用方法完成提交form表单
var row=$('#dg').datagrid("getSelected");//拿到这个datagrid选中的那一行
var book_id = row.book_id;//拿到书本id
//form表单action提交调用那个上传图片方法拼接上id
$("#imageUpload").attr("action", $("#URL").val() +"/bookservlet.action?methodName=imageUpload&&book_id="+book_id);
$("#imageUpload").submit();//拿到form的id进行提交
}
上面代码都写好之后进行可进行上传图片了 然后就ok 了 记得多刷新刷新试试 反复测试 才可保证有没有错误哦！