Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Submit feedback
Sign in / Register
Toggle navigation
Y
yzg-util
Project
Project
Details
Activity
Releases
Cycle Analytics
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Charts
Issues
0
Issues
0
List
Board
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Charts
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Charts
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
YZG
yzg-util
Commits
f596f934
Commit
f596f934
authored
Feb 28, 2021
by
yanzg
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
公式计算处理
parent
4959c2c5
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
20 additions
and
6 deletions
+20
-6
CalcHelper.java
...src/main/java/com/yanzuoguang/util/helper/CalcHelper.java
+20
-6
No files found.
yzg-util-base/src/main/java/com/yanzuoguang/util/helper/CalcHelper.java
View file @
f596f934
...
...
@@ -21,6 +21,8 @@ public class CalcHelper {
private
static
final
String
REGEX_CALC_TAG
=
"[+\\-*/()]+"
;
private
static
final
String
EMPTY_CHAR
=
" "
;
private
static
CalcHelper
calcInstance
=
new
CalcHelper
();
/**
* 公式参数获取
*/
...
...
@@ -42,6 +44,18 @@ public class CalcHelper {
* @return 运算后的结果
*/
public
static
double
calc
(
String
formula
,
CalcParameter
calcParameter
)
{
return
calcInstance
.
calRun
(
formula
,
calcParameter
);
}
/**
* 计算公式
*
* @param formula 公式内容,支持括号、空格、数字、+、-、*、/、变量名,如: A * ( B + C )
* @param calcParameter 获取变量值
* @return 运算后的结果
*/
private
double
calRun
(
String
formula
,
CalcParameter
calcParameter
)
{
if
(
StringHelper
.
isEmpty
(
formula
))
{
return
0
;
}
...
...
@@ -60,7 +74,7 @@ public class CalcHelper {
*
* @param formula 输入等式的右边
**/
private
static
List
<
String
>
getVarNames
(
String
formula
)
{
private
List
<
String
>
getVarNames
(
String
formula
)
{
List
<
String
>
list
=
new
ArrayList
<>();
//清理所有运算符,并且包含多个运算符号时,将多个运算符号当成一个运算符号处理
String
formulaTo
=
formula
.
replaceAll
(
REGEX_CALC_TAG
,
EMPTY_CHAR
);
...
...
@@ -82,7 +96,7 @@ public class CalcHelper {
* @param calcParameter 获取变量值
* @return 变量值
*/
private
static
Map
<
String
,
Double
>
getVarValues
(
List
<
String
>
varNames
,
CalcParameter
calcParameter
)
{
private
Map
<
String
,
Double
>
getVarValues
(
List
<
String
>
varNames
,
CalcParameter
calcParameter
)
{
// 获取所有的变量值
Map
<
String
,
Double
>
varValues
=
new
HashMap
<>();
for
(
String
name
:
varNames
)
{
...
...
@@ -102,7 +116,7 @@ public class CalcHelper {
* @param varValues 变量值
* @return
*/
private
static
double
calcProc
(
String
formula
,
Map
<
String
,
Double
>
varValues
)
{
private
double
calcProc
(
String
formula
,
Map
<
String
,
Double
>
varValues
)
{
double
ret
=
0
;
if
(
formula
.
matches
(
REGEX_QUOT
))
{
// 获取第一个括号和最后一个括号
...
...
@@ -129,7 +143,7 @@ public class CalcHelper {
}
else
{
ret
=
varValues
.
get
(
formula
);
}
System
.
out
.
println
(
"公式: "
+
formula
+
" 值"
+
ret
);
//
System.out.println("公式: " + formula + " 值" + ret);
return
ret
;
}
...
...
@@ -140,7 +154,7 @@ public class CalcHelper {
* @param formula 公式
* @return 匹配后的结果
*/
private
static
Matcher
getMatcher
(
String
regex
,
String
formula
)
{
private
Matcher
getMatcher
(
String
regex
,
String
formula
)
{
Pattern
p
=
Pattern
.
compile
(
regex
);
Matcher
matcher
=
p
.
matcher
(
formula
);
if
(!
matcher
.
find
())
{
...
...
@@ -149,7 +163,7 @@ public class CalcHelper {
return
matcher
;
}
private
static
double
calcItem
(
String
flag
,
double
a
,
double
b
)
{
private
double
calcItem
(
String
flag
,
double
a
,
double
b
)
{
switch
(
flag
)
{
case
"+"
:
return
a
+
b
;
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment