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来自 , 2020-10-10, 写在 Java, 查看 139 次.
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/**
* 身份证验证
* @author Administrator
*
*/
public
class
IDCard
{
private
final
static
int
[
]
FACTOR
=
new
int
[
]
{
7
,
9
,
10
,
5
,
8
,
4
,
2
,
1
,
6
,
3
,
7
,
9
,
10
,
5
,
8
,
4
,
2
}
;
/**
* 计算前17位身份证号乘以系数后的总和
* @param id17 前17位身份证号
* @return
*/
private
static
int
sumFactor
(
String
id17
)
{
if
(
id17
==
null
||
id17.
trim
(
)
.
equals
(
""
)
)
{
return
-
1
;
//输入的身份证为空
}
int
len
=
id17.
length
(
)
;
if
(
len
!=
17
)
{
return
-
3
;
//输入的身份证号码不为17位
}
int
sum
=
0
;
for
(
int
i
=
0
;
i
<
len
;
i
++
)
{
sum
+=
FACTOR
[
i
]
*
Integer
.
parseInt
(
String
.
valueOf
(
id17.
charAt
(
i
)
)
)
;
}
return
sum
;
}
/**
* 根据前17位身份证号,算出第18位的数字
* @param id17
* @return
*/
public
static
String
getLastNumOfID
(
String
id17
)
{
int
sum
=
sumFactor
(
id17
)
;
String
res
=
""
;
if
(
sum
==-
1
)
{
return
"输入的身份证为空"
;
}
else
if
(
sum
==-
3
)
{
return
"输入的身份证号码不为17位"
;
}
else
{
int
mod
=
sum
%
11
;
switch
(
mod
)
{
case
0
:
res
=
"1"
;
break
;
case
1
:
res
=
"0"
;
break
;
case
2
:
res
=
"X"
;
break
;
case
3
:
res
=
"9"
;
break
;
case
4
:
res
=
"8"
;
break
;
case
5
:
res
=
"7"
;
break
;
case
6
:
res
=
"6"
;
break
;
case
7
:
res
=
"5"
;
break
;
case
8
:
res
=
"4"
;
break
;
case
9
:
res
=
"3"
;
break
;
case
10
:
res
=
"2"
;
break
;
default
:
break
;
}
}
return
res
;
}
/**
* 判断输入的身份证是否合法
* @param idNum 18位的身份证号
* @return
*/
public
static
boolean
isCorrectID
(
String
idNum
)
{
boolean
flag
=
false
;
if
(
idNum
==
null
||
idNum.
trim
(
)
.
length
(
)
!=
18
)
{
return
flag
;
}
String
last
=
getLastNumOfID
(
idNum.
substring
(
0
, idNum.
length
(
)
-
1
)
)
;
if
(
last.
equals
(
String
.
valueOf
(
idNum.
charAt
(
idNum.
length
(
)
-
1
)
)
)
)
{
flag
=
true
;
}
return
flag
;
}
public
static
void
main
(
String
[
]
args
)
{
System
.
out
.
println
(
getLastNumOfID
(
"36232319910420171"
)
)
;
System
.
out
.
println
(
isCorrectID
(
"362323199104201719"
)
)
;
}
}
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/** * 身份证验证 * @author Administrator * */ public class IDCard { private final static int[] FACTOR = new int[]{7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2}; /** * 计算前17位身份证号乘以系数后的总和 * @param id17 前17位身份证号 * @return */ private static int sumFactor(String id17) { if(id17==null || id17.trim().equals("")) { return -1; //输入的身份证为空 } int len = id17.length(); if(len!=17) { return -3; //输入的身份证号码不为17位 } int sum = 0; for(int i=0; i
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