<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>demo</title> <style> * { font-size: 30px; line-height: 1.8; } </style> </head> <body> <h1>员工查询</h1> <label>请输入员工的编号</label> <input type="text" id="keyword" /> <button id="search">查询</button> <p id="searchResult"></p> <h1>员工新建</h1> <label>请输入员工的姓名</label> <input type="text" id="staffName" /><br /> <label>请输入员工的编号</label> <input type="text" id="staffNumber" /><br /> <label>请输入员工的性别</label> <select id="staffSex"> <option>男</option> <option>女</option> </select><br /> <label>请输入员工的职位</label> <input type="text" id="staffJob" /><br /> <button id="save">保存</button> <p id="createResult"></p> <script> document.getElementById('search').onclick = function() { //发送Ajax查询请求并处理 var request = new XMLHttpRequest(); request.open('GET', 'service.php?number=' + document.getElementById('keyword').value); request.send(); request.onreadystatechange = function() { if(request.readyState === 4) { if(request.status === 200) { var data = JSON.parse(request.responseText); if(data.success) { document.getElementById("searchResult").innerHTML = data.msg; } else { document.getElementById("searchResult").innerHTML = '出现错误：' + data.msg; } } else { alert("发生错误：" + request.status); } } } } document.getElementById('save').onclick = function() { //发送Ajax查询请求并处理 var request = new XMLHttpRequest(); request.open('POST', 'service.php'); var date = "name=" + document.getElementById('staffName').value + "&number=" + document.getElementById('staffNumber').value + "&sex=" + document.getElementById('staffSex').value + "&job=" + document.getElementById('staffJob').value; request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded') request.send(date); request.onreadystatechange = function() { if(request.readyState === 4) { if(request.status === 200) { var data = JSON.parse(request.responseText); if(data.success) { document.getElementById("createResult").innerHTML = data.msg; } else { document.getElementById("createResult").innerHTML = "出现错误：" + data.msg; } } else { alert("发生错误：" + request.status); } } } } </script> </body></html>点击查询出现这个：VM93:1 Uncaught SyntaxError: Unexpected token < in JSON at position 0点击保存就没出错
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