怎样在java代码中实现反馈javascript alert();

发布网友发布时间：2022-04-23 01:36

共8个回答

懂视网时间：2022-04-23 05:57

重点分析JavaScript重写alert()方法的技巧

window.alert = function(str) { 
 var alertBox = document.createElement("div"); 
 alertBox.id="alertBox"; 
 alertBox.style.position = "absolute"; 
 alertBox.style.width = "400px"; 
 alertBox.style.background = "#F2F2F2"; 
 alertBox.style.border = "1px solid grey"; 
 alertBox.style.left = "50%"; 
 alertBox.style.top = "50%"; 
 alertBox.style.transform = "translate(-50%, -50%)"; 
 alertBox.style.textAlign = "center"; 
 alertBox.style.zIndex = "100"; 
 var strHtml = ""; 
 strHtml += '<div id="title">提示：<div id="close" onclick="certainFunc()"></div></div>'; 
 strHtml += '<div id="content">'+str+'</div>'; 
 strHtml += '<div id="certain"><input id="btn" type="button" value="确 定" onclick="certainFunc()" onhover="hoverFunc()"/></div>'; 
 alertBox.innerHTML = strHtml; 
 document.body.appendChild(alertBox); 
 var title = document.getElementById("title"); 
 title.style.textAlign = "left"; 
 title.style.marginTop = "20px"; 
 title.style.paddingLeft = "20px"; 
 title.style.height = "30px"; 
 title.style.fontSize = "15px"; 
 var close = document.getElementById("close"); 
 close.style.width = "16px"; 
 close.style.height = "16px"; 
 close.style.marginRight = "20px"; 
 close.style.background = "url('images/close.png')"; 
 close.style.float = "right"; 
 var content = document.getElementById("content"); 
 content.style.margin = "20px"; 
 content.style.fontSize = "12px"; 
 var certain = document.getElementById("certain"); 
 certain.style.position = "relative"; 
 certain.style.height = "50px"; 
 certainFunc = function() { 
 alertBox.parentNode.removeChild(alertBox); 
 }; 
 var btn = document.getElementById("btn"); 
 btn.style.width = "60px"; 
 btn.style.height = "30px"; 
 btn.style.background = "#cccccc"; 
 btn.style.border = "1px solid grey"; 
 btn.style.position = "absolute"; 
 btn.style.borderRadius = "5px"; 
 btn.style.right = "20px"; 
 btn.style.bottom = "20px"; 
 btn.style.marginTop = "10px"; 
 btn.style.cursor = "pointer"; 
 btn.style.color = "#333"; 
 hoverFunc = function() { 
 btn.style.border = "1px blue solid"; 
 }; 
}

上面是我整理的重点分析JavaScript重写alert()方法的技巧给大家的，希望今后会对大家有帮助。

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热心网友时间：2022-04-23 03:05

HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("text/html; charset=utf-8");
PrintWriter writer = response.getWriter();
writer.write("<script>alert('xxx');</script>");
writer.write("<script>window.close();</script>");
writer.close();
writer.flush();

热心网友时间：2022-04-23 04:23

你好，alert()是javascript脚本的方法，需要在jsp或者js文件中使用。当然，还可以使用servlet的out.println()中打印html时写上，servlet是java类，但这样实质也是在服务端生成jsp文件后生效的。

热心网友时间：2022-04-23 05:58

在java代码中写一个字符串，然后直接在jsp上输出这个字符串，字符串的内容就是alert

热心网友时间：2022-04-23 07:49

PrintWriter outNet;
outNet.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
outNet.println("<HTML>");
outNet.println(" <HEAD><TITLE>A Servlet</TITLE>");
outNet.println("<script language='Javascript'></script>");
outNet.println("</HEAD> <BODY>");
outNet.println(" </BODY>");
outNet.println("</HTML>");
outNet.flush();
outNet.close();

热心网友时间：2022-04-23 09:57

out.println("<script type=\"text/javascript\">");
out.println("alert(\"用户未登录或会话已过期，请重新登录！\");");
out.println("</script>");

热心网友时间：2022-04-23 12:22

不是很明白你的问题，你是想java中返回一个数据，然后js中alert出来吗。如果是这样一般都是用ajax来实现。

热心网友时间：2022-04-23 15:03

Java框架DWR

怎样在java代码中 实现反馈javascript alert();

怎样在java代码中实现反馈javascript alert();