Question

我有一个域类

class UploadSyllabus {
    String semester
    Course course
    Department department
    byte[] uploadSyllabus
}

其中Course，Department是其他域类

在我的Show.gsp页

中

<a style="margin-left: 108px;"href="javascript:getPdfFromDB()" id="downloadPdf">Download_Syllabus.pdf</a>


function getPdfFromDB(){
    var formdata = $("#downloadSyllabusForm").serialize();
    $.get("${grailsApplication.config.grails.serverURL}/uploadSyllabus/getPdfFromDBC", formdata, function(response) {
        for (var i = 0; i < response.length; i++) {
            document.getElementById("subjectResult").innerHTML=response
            document.getElementById("courseResult").innerHTML=$("#course option:selected").text();
            document.getElementById("semesterResult").innerHTML=$("#semester option:selected").text();
        }
    });
}

我的控制人员的行动：

def getPdfFromDBC = {
    def sem = params.semester
    def course = params.course
    def department = params.department
    List s= UploadSyllabus.executeQuery("select id from UploadSyllabus where department_id = "+params.department +"AND course_id = "+params.course + "AND semester = "+sem)
    def product = UploadSyllabus.get(s[0])
    println "product is ---"+product
    response.contentType = 'application/pdf'
    response.setHeader('Content-disposition', 'Attachment; filename=uploadSyllabus.pdf')
    response.getOutputStream().write(product.uploadSyllabus)
    response.getOutputStream().flush()
    // render s.name as SHALLOW
}

我需要做的是我在视图页面中有三个下拉列表，当我选择其中三个并点击下载链接时，需要下载已在数据库中上传的特定pdf。

当我运行我的代码时，我没有收到任何错误，但得到“页面变得反应迟钝。请杀死或等待浏览器。”

Answer 1

你不能在document.getElementById（“subjectResult”）中插入pdf。innerHTML = response

如果你想在html中渲染pdf，请使用pdf.js

https://github.com/mozilla/pdf.js

我已经将pdf文件存储为blob，当我尝试在浏览器中将其呈现为pdf时

1 个答案: