[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; b;sjw5cm_
} 1hgmlY`
int i1=l; UbV} !
int i2=mid+1; -zLxT
for(int cur=l;cur<=r;cur++){ (z<&PP
if(i1==mid+1) #bLeK$
data[cur]=temp[i2++]; [kq+a]q
else if(i2>r) uH!;4@uI
data[cur]=temp[i1++]; "7a;Apq*
else if(temp[i1] data[cur]=temp[i1++]; 0bk094
else !ly]{DTmm
data[cur]=temp[i2++]; LaiUf_W#X
} re}P
} -{fbZk&A
uU00ZPS*G[
} c=HL 6v<
f_Q_qckB%x
改进后的归并排序: WAcQRa~C
2myHn/%C
package org.rut.util.algorithm.support; F D6>[W
r&ex<(I{
import org.rut.util.algorithm.SortUtil; "%Eyb\V!
/ZKO\q
/** ~A=Z/46*Z
* @author treeroot ;HaG-c</
* @since 2006-2-2 O ijG@bI8
* @version 1.0 *tT}y(M
*/ %.D@{O
public class ImprovedMergeSort implements SortUtil.Sort { C"ZCX6p+$
} Pc6_#
private static final int THRESHOLD = 10; &wZ:$lK#o
XA:v:JFS
/* fXYg %
* (non-Javadoc) <%Re!y@OL
* s&$Zgf6Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aOj5b>>
*/ X"{s"Mc0G
public void sort(int[] data) { U(=cGA.$
int[] temp=new int[data.length]; -pR1xsG
mergeSort(data,temp,0,data.length-1); scUWI"
} =X2EF
]7^YPFc+
private void mergeSort(int[] data, int[] temp, int l, int r) { hQgi--Msw'
int i, j, k; BY$%gIB6>
int mid = (l + r) / 2; R('44v5JQp
if (l == r) PTvP;
return; |nj%G<
if ((mid - l) >= THRESHOLD) <H~ (iQ
mergeSort(data, temp, l, mid); ZUMzWK5Th
else T{j&w%(z
insertSort(data, l, mid - l + 1); _>*$%R
if ((r - mid) > THRESHOLD) #sEbu^
mergeSort(data, temp, mid + 1, r); LE!3'^Zq
else E-irB/0
insertSort(data, mid + 1, r - mid); I=pTfkTT
fF8g3|p:
for (i = l; i <= mid; i++) { B;':Eaa@
temp = data; R '/Ilz`
} E7axINca
for (j = 1; j <= r - mid; j++) { ]baO{pJi
temp[r - j + 1] = data[j + mid]; u<\/T&S
} #x&1kHu<
int a = temp[l]; F 3}cVO2bY
int b = temp[r]; ;^FV
for (i = l, j = r, k = l; k <= r; k++) { pUr.<yc&u
if (a < b) { TP oP%Yj"
data[k] = temp[i++]; 70m}+R(`
a = temp; y_8 8I:O
} else { -q\1Tlc]3
data[k] = temp[j--]; o$YL\ <qp
b = temp[j]; 9[B*CD|
} hM(|d@)
} >+fet ,
} ?!~CX`eMZ
q=E<y
/** jO$3>q
* @param data Xi1/wbC
* @param l WrL&$dEJ?M
* @param i U)+Yh
*/ }}l04kN_
private void insertSort(int[] data, int start, int len) { -pc*$oe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l>S~)FNwXJ
} ;Zc(qA
} $q{-)=-BXQ
} rRL:]%POT
} qI"@ PI!s
Jpws1~
堆排序： sL XQ)Ce
4jj@"*^a
package org.rut.util.algorithm.support; k|nv[xY0
pl V]hu27K
import org.rut.util.algorithm.SortUtil; +dk}$w[g
QVI4<Rxg
/** $GYcZN&
* @author treeroot ep Eg6
* @since 2006-2-2 PSNrY e
* @version 1.0 &jf:7y
*/ ~k4S~!(U0
public class HeapSort implements SortUtil.Sort{ ,)nO
PygaW&9Z|d
/* (non-Javadoc) Lu6!W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5R/!e`(m
*/ z'MOuz~Y
public void sort(int[] data) { soXeHjNl
MaxHeap h=new MaxHeap(); vWcU+GBZI
h.init(data); R-"A*/A 2
for(int i=0;i h.remove(); j}'spKxu
System.arraycopy(h.queue,1,data,0,data.length); 5EIh5Y EU>
} ^c!"*L0E
(5re'Pl
private static class MaxHeap{ pog*}@OS
KE`}P<K&
void init(int[] data){ ]4yWcnf
this.queue=new int[data.length+1]; B{lBUv(B
for(int i=0;i queue[++size]=data; V,fSn:8%M
fixUp(size); egxh
} sME3s-
} U`D/~KJ{Y
q<yp6Q3^
private int size=0; 8/x@|rjW
>Q#_<IcI
private int[] queue; lzN\~5a}
AF>J8V
public int get() { Mk7,:S
return queue[1]; kcVEE)zb
} 0p:FAvvNI
?k]^?7GN
public void remove() { pM=@
SortUtil.swap(queue,1,size--); <V#9a83JP
fixDown(1); ds,NNN<HW
} _<|NVweFS
file://fixdown 0{j]p^'<
private void fixDown(int k) { u1xCn\
int j; 0~Z>}(
while ((j = k << 1) <= size) { &p%0cjg"Q
if (j < size %26amp;%26amp; queue[j] j++; yf*^Y74
if (queue[k]>queue[j]) file://不用交换 hW6og)x
break; &xo,49`!
SortUtil.swap(queue,j,k); #HpF\{{v
k = j; F$7>q'#
} a_P8!pk+5
} [O>}%
private void fixUp(int k) { j{U?kW{o
while (k > 1) { 9^,MC&eb
int j = k >> 1; V)72]p
if (queue[j]>queue[k]) j BS$xW
break; Q\z6/1:9Z
SortUtil.swap(queue,j,k); Jw)Uk< \
k = j; t23uQR#>b_
} D |kdk;Xv
} \3LP@;Phn
`+[Ct08
} Z1 %"w*U
gE]6]L
} D]\of#%T
FCnOvF65
SortUtil： $8vZiB!"
ZgK[,<2
package org.rut.util.algorithm; xr}3vJ7
]KdSwIbi
import org.rut.util.algorithm.support.BubbleSort; iqm]sC`
import org.rut.util.algorithm.support.HeapSort; VPoA,;Y"-
import org.rut.util.algorithm.support.ImprovedMergeSort; mD<- <]SYp
import org.rut.util.algorithm.support.ImprovedQuickSort; T^> ST
import org.rut.util.algorithm.support.InsertSort; >7i&(6L
import org.rut.util.algorithm.support.MergeSort; $(/=Wn
import org.rut.util.algorithm.support.QuickSort; _GS_R%b
import org.rut.util.algorithm.support.SelectionSort; L&ucTc=
import org.rut.util.algorithm.support.ShellSort; 7ESSx"^B
F_.rLgGY
/** CT,PQ
* @author treeroot GdHFgxI
* @since 2006-2-2 t%Sgw%f
* @version 1.0 A[:0?Ez=
*/ P0VXHE1p
public class SortUtil { $`,10uw
public final static int INSERT = 1; !Hq$7j_
public final static int BUBBLE = 2; 2o2jDQ|7
public final static int SELECTION = 3; @6\Id7`Ea
public final static int SHELL = 4; KT$Za
public final static int QUICK = 5; R8LJC]6Bh
public final static int IMPROVED_QUICK = 6; _)-t#Ve
public final static int MERGE = 7; fUj[E0yOF
public final static int IMPROVED_MERGE = 8; dt&m YSZ}
public final static int HEAP = 9; (7Su{tq
P/i{_r
public static void sort(int[] data) { ~(i#A>
sort(data, IMPROVED_QUICK); >-U'mkIH
} 3L}eFg,d
private static String[] name={ '. 5&Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +~xY}
}; s^f7w
K#Ia19au5
private static Sort[] impl=new Sort[]{ O|%03q(
new InsertSort(), x*>@knP<-
new BubbleSort(), Qw>~]d,Z
new SelectionSort(), OlRtVp1
new ShellSort(), !r\u,l^
new QuickSort(), >TI/W~M
new ImprovedQuickSort(), >7g #e,d
new MergeSort(), 'Ur1I"
new ImprovedMergeSort(), [$\KS_,Mn
new HeapSort() #+CH0Z
}; sgYPR
gOiZ8K!
public static String toString(int algorithm){ Uh[MBwK
return name[algorithm-1]; `1Ui
} ;]v{3m
|5il5UP
public static void sort(int[] data, int algorithm) { 7v'aw"~
impl[algorithm-1].sort(data); J9aqmQj('
} U{1%ldOJ%
xB5qX7*.
public static interface Sort { p>#sR4d>
public void sort(int[] data); Q1kZ+b&
} (\8IgQ{
(KG2X
public static void swap(int[] data, int i, int j) { To/6=$wto
int temp = data; x%h4'Sm
data = data[j]; aSse' C<a
data[j] = temp; 74_':,u;]~
} L6d^e53AP
} -@7?N6~qZx