从 Struts2 Action 类调用 Javascript
我想从struts2调用一个javascript函数。
package com.example.controller;
import java.io.IOException;
import java.io.PrintWriter;
import com.opensymphony.xwork2.ActionSupport;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.interceptor.ServletResponseAware;
public class FileUploadAction extends ActionSupport implements ServletResponseAware {
private static final long serialVersionUID = 1L;
HttpServletResponse response;
public String execute() throws IOException{
System.out.println("I am in Action");
PrintWriter out;
out = response.getWriter();
response.setContentType("text/html");
out.println("<html>");
out.println("<head>");
out.println("<script type=\"text/javascript\">");
out.println("function foo() { ");
out.println("alert('From Struts Action');");
out.println("window.top.uploadComplete('1');");
out.println("}");
out.println("</script>");
out.println("</head>");
out.println("<body onload=\"foo();\">");
out.println("</body>");
out.println("</html>");
return SUCCESS;
}
@Override
public void setServletResponse(HttpServletResponse response) {
this.response = response;
}
public HttpServletResponse getServletResponse() {
return this.response;
}
}
在这里，我什至没有得到“警觉”。即它不起作用， 在后端它会抛出警告
[WARN] 404 - GET /success (127.0.0.1) 1393 bytes
Request headers
Host: 127.0.0.1:8888
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-gb,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Cookie: JSESSIONID=pvv1gasa4o7l
Referer: http://127.0.0.1:8888/GWTDemo.html?gwt.codesvr=127.0.0.1:9997
Response headers
Content-Type: text/html; charset=iso-8859-1
Content-Length: 1393
请帮忙？
I want to call a javascript function from struts2.
package com.example.controller;
import java.io.IOException;
import java.io.PrintWriter;
import com.opensymphony.xwork2.ActionSupport;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.interceptor.ServletResponseAware;
public class FileUploadAction extends ActionSupport implements ServletResponseAware {
private static final long serialVersionUID = 1L;
HttpServletResponse response;
public String execute() throws IOException{
System.out.println("I am in Action");
PrintWriter out;
out = response.getWriter();
response.setContentType("text/html");
out.println("<html>");
out.println("<head>");
out.println("<script type=\"text/javascript\">");
out.println("function foo() { ");
out.println("alert('From Struts Action');");
out.println("window.top.uploadComplete('1');");
out.println("}");
out.println("</script>");
out.println("</head>");
out.println("<body onload=\"foo();\">");
out.println("</body>");
out.println("</html>");
return SUCCESS;
}
@Override
public void setServletResponse(HttpServletResponse response) {
this.response = response;
}
public HttpServletResponse getServletResponse() {
return this.response;
}
}
Here, I am not getting even 'alert'. i.e. it is not working,
and In back end it throws warning
[WARN] 404 - GET /success (127.0.0.1) 1393 bytes
Request headers
Host: 127.0.0.1:8888
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-gb,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Cookie: JSESSIONID=pvv1gasa4o7l
Referer: http://127.0.0.1:8888/GWTDemo.html?gwt.codesvr=127.0.0.1:9997
Response headers
Content-Type: text/html; charset=iso-8859-1
Content-Length: 1393
Please help ?
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评论（2）
您尝试提交两个响应——首先直接提交到
HttpServletResponse，然后使用 Struts2 命名结果（即SUCCESS）。将 JavaScript 代码放置在视图层中。
You are trying to commit two responses -- first directly to the
HttpServletResponseand then using the Struts2 named result (i.e.,SUCCESS).Place the JavaScript code in your view layer.
您能描述一下为什么您需要从 Struts2 操作调用 javascript 吗？这可能会帮助我们为您提供更好的方法，史蒂文所说的是正确的，您尝试提交 2 个响应
Can you describe why you need to call javascript from Struts2 action may be it will help us to provide you better way and what Steven said is correct you tried commiting 2 responses