在服务器中添加一个SSH项目时，服务器运行一段时间后报错。
错误如下：
三月 06, 2017 5:45:50 下午 org.apache.catalina.startup.Catalina start
信息: Server startup in 21784 ms
三月 06, 2017 5:46:35 下午 org.apache.jasper.compiler.TldLocationsCache tldScanJar
信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
三月 06, 2017 6:41:24 下午 org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom
信息: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [468] milliseconds.
三月 06, 2017 7:00:53 下午 org.quartz.core.JobRunShell run
严重: Job HtmlChannelJob.HtmlChannelJob8757c397-a53d-4c3d-84a0-929aac8e6db5 threw an unhandled Exception:
java.lang.OutOfMemoryError: PermGen space
原服务器中有2个项目，把新加的项目war包直接放入webapps中。运行几个小时后出现了内存溢出的错误。
服务器tomcat配置如下
新加的SSH项目有 excl导入导出功能，代码如下：
package zcib.recruitment.action;
import zcib.recruitment.action.utils.UploadFile;
import zcib.recruitment.domain.Student;
import zcib.recruitment.service.StudentService;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.struts2.ServletActionContext;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.interceptor.ServletRequestAware;
import com.opensymphony.xwork2.ActionSupport;
public class AddStudentAction extends ActionSupport implements ServletRequestAware {
private InputStream excelFile;
private File uploadFile;
private String uploadFileFileName;
private StudentService studentService;
private Student student;
private String verifyCode;
private HttpServletRequest request;
// 进入页面查询数据
public String listAll() {
HttpServletRequest request = ServletActionContext.getRequest();
List<Student> sList = studentService.findAll();
request.setAttribute("list", sList);
return "listAll";
}
// 导出Excel
public String ExcelExport() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
String ids = request.getParameter("ids");
List<Student> list = new ArrayList<Student>();
String[] array = ids.split(",");
int[] id = new int[array.length];
for (int i = 0; i < id.length; i++) {
Student student = studentService
.findById(Integer.valueOf(array[i]));
list.add(student);
}
Workbook workbook = new HSSFWorkbook();
Sheet sheet = workbook.createSheet("学生信息");
Row row = sheet.createRow(0);
row.createCell(0).setCellValue("考号");
row.createCell(1).setCellValue("姓名");
row.createCell(2).setCellValue("身份证号");
row.createCell(3).setCellValue("性别");
row.createCell(4).setCellValue("备注");
CellStyle cellStyle = workbook.createCellStyle();
cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy"));
for (int i = 1; i <= list.size(); i++) {
Student stu = list.get(i - 1);
row = sheet.createRow(i);
row.createCell(0).setCellValue(stu.getExamId());
row.createCell(1).setCellValue(stu.getName());
row.createCell(2).setCellValue(stu.getMemberId());
row.createCell(3).setCellValue(stu.getSex());
row.createCell(4).setCellValue(stu.getRemark());
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
workbook.write(baos);
excelFile = new ByteArrayInputStream(baos.toByteArray());
baos.close();
return "excel";
}
// 导入Excel
public String ExcelInto() throws Exception {
String directory = "/file";
String targetDirectory = ServletActionContext.getServletContext().getRealPath(directory);
File target = UploadFile.Upload(uploadFile, uploadFileFileName,targetDirectory);
List<Student> sList = new ArrayList<Student>();
excelFile = new FileInputStream(target);
Workbook wb = new HSSFWorkbook(excelFile);
Sheet sheet = wb.getSheetAt(0);
int rowNum = sheet.getLastRowNum() + 1;
for (int i = 1; i < rowNum; i++) {
Student student = new Student();
Row row = sheet.getRow(i);
int cellNum = row.getLastCellNum();
for (int j = 0; j < cellNum; j++) {
Cell cell = row.getCell(j);
String cellValue = null;
switch (cell.getCellType()) { // 判断excel单元格内容的格式，并对其进行转换，以便插入数据库
case 0:
cellValue = String
.valueOf((int) cell.getNumericCellValue());
break;
case 1:
cellValue = cell.getStringCellValue();
break;
case 2:
cellValue = String
.valueOf((int) cell.getNumericCellValue());
break;
case 3:
cellValue = cell.getStringCellValue();
break;
case 4:
cellValue = cell.getStringCellValue();
break;
}
switch (j) {// 通过列数来判断对应插如的字段
case 0:
student.setExamId(cellValue);
break;
case 1:
student.setName(cellValue);
break;
case 2:
student.setMemberId(cellValue);
break;
case 3:
student.setSex(Integer.valueOf(cellValue));
break;
case 4:
student.setRemark(cellValue);
}
}
Student stu = studentService.findByExamId(student.getExamId());//判断数据库中是否拥有重复学生
if(stu==null){
sList.add(student);
}
}
studentService.save(sList);
return "success";
}
public void setServletRequest(HttpServletRequest request) {
this.request = request;
}
public Student getStudent() {
return student;
}
public void setStudent(Student student) {
this.student = student;
}
public String getVerifyCode() {
return verifyCode;
}
public void setVerifyCode(String verifyCode) {
this.verifyCode = verifyCode;
}
public StudentService getStudentService() {
return studentService;
}
public void setStudentService(StudentService studentService) {
this.studentService = studentService;
}
public InputStream getExcelFile() {
return excelFile;
}
public void setExcelFile(InputStream excelFile) {
this.excelFile = excelFile;
}
public File getUploadFile() {
return uploadFile;
}
public void setUploadFile(File uploadFile) {
this.uploadFile = uploadFile;
}
public String getUploadFileFileName() {
return uploadFileFileName;
}
public void setUploadFileFileName(String uploadFileFileName) {
this.uploadFileFileName = uploadFileFileName;
}
public HttpServletRequest getRequest() {
return request;
}
public void setRequest(HttpServletRequest request) {
this.request = request;
}
}
struts配置如下：
<action name="export_*" class="zcib.recruitment.action.AddStudentAction" method="{1}">
<result name="listAll">/recruitmentInfoList.jsp</result>
<result name="success" type="redirect">export_listAll.action</result>
<result name="excel" type="stream">
<param name="contentType">application/vnd.ms-excel</param>
<param name="contentDisposition">attachment;filename="AllUsers.xls"</param>
<param name="inputName">excelFile</param>
</result>
<result name="pdf" type="stream">
<param name="contentType">application/pdf; charset=gb2312</param>
<param name="inputName">excelFile</param>
<param name="contentDisposition">attachment; filename="contract.pdf"</param>
<param name="bufferSize">2048</param>
</result>
<result name="word" type="redirect">export_listAll.action</result>
</action>
求大神帮忙看一下 内存溢出到底什么问题。
