java.lang.NumberFormatException: For input string: "null"

[rookie926]

java.lang.NumberFormatException: For input string: "null"
java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
java.lang.Integer.parseInt(Integer.java:447)
java.lang.Integer.parseInt(Integer.java:497)
org.apache.jsp.report.result_jsp._jspService(result_jsp.java:134)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
com.fenglian.security.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:38)

查了下result_jsp.java:134，显示sumbyzone[Integer.parseInt(ha.get(m+"")+"")][k-ndate1] = rs.getString("num1");这行出的错误

String[][] sumbyzone = new String[9][datelength];

for(i=0;i<9;i++)
{
for (j = 0; j < datelength; j++)
{
sumbyzone[i][j] = "0";
}
}

for (m = 2201; m < 2209; m++)
{
for(k = ndate1; k<ndate1+datelength; k++)
{
rs = javaBean.sumbyzone(k+"",m+"");

if (rs != null)
{
while (rs.next())
{
134行 ---- sumbyzone[Integer.parseInt(ha.get(m+"")+"")][k-ndate1] = rs.getString("num1");
}
}
}
}

不明白应该不会有null值被转换成int了啊

[swandragon]

ha.get(m+"")
可能是这个为空，检查一下

[laorer]

ha.get(m+"")
不知道你的 hashMap 中是什么东西

[rookie926]

Hashtable ha = new Hashtable();
ha.put("2101", "0");
ha.put("2102", "1");
ha.put("2103", "2");
ha.put("2104", "3");
ha.put("2105", "4");
ha.put("2106", "5");
ha.put("2107", "6");
ha.put("2108", "7");
ha.put("2124", "8");

循环那个m的话应该不会get到空值吧

[rookie926]

是2201-.-，区划应该按吉林算一直按辽宁写的，太马虎遭不住自己了，结贴- -