[JAVA]用Java实现的各种排序

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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; U&tfl/
} yd\5Z[iEp
int i1=l; `two|gX0K
int i2=mid+1; IptB.bYc
for(int cur=l;cur<=r;cur++){ ^\xCqVk_R
if(i1==mid+1) 3RBpbTNWp
data[cur]=temp[i2++]; N[- %0
else if(i2>r) $w 5#2Za
data[cur]=temp[i1++]; 0[_O+u
else if(temp[i1] data[cur]=temp[i1++]; ;P0,60
else yaCd4KP
data[cur]=temp[i2++]; l"2^S6vU
} >eYU$/80
} U^vUdM"
PT 0Qzg
} F5:2TEA
T)$6H}[c
改进后的归并排序: Z1XUYe62
dm/-}
package org.rut.util.algorithm.support; LC~CPV'F
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import org.rut.util.algorithm.SortUtil; G~b`O20N
bW,BhUb,|
/** [a#?}((
* @author treeroot ?uNTUU,
* @since 2006-2-2 4i ~eTb
* @version 1.0 xg*\j)_}
*/ ~z-?rW
public class ImprovedMergeSort implements SortUtil.Sort { `8$:F4%P
__oY:d(~
private static final int THRESHOLD = 10; (:</R$I
~Hp#6+
/* y\r^\ S9%
* (non-Javadoc) a+4`}:KA#
* (9WL+S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e _SoM!;
*/ "u3fs2
public void sort(int[] data) { !;xf>API
int[] temp=new int[data.length]; A1#4nkkc9
mergeSort(data,temp,0,data.length-1); [RGC!}"mr
} e>ZbZy?
KNO*)\
private void mergeSort(int[] data, int[] temp, int l, int r) { op.PS{_t
int i, j, k; 3[00-~&U
int mid = (l + r) / 2; 'PmHBQvt&
if (l == r) i{1)=_$Vt`
return; 8.q13t!D
if ((mid - l) >= THRESHOLD) [N0/">c
mergeSort(data, temp, l, mid); k8Su/U
else JO<gN= [
insertSort(data, l, mid - l + 1); mM\!4Yi`7
if ((r - mid) > THRESHOLD) >uP{9kDm
mergeSort(data, temp, mid + 1, r); |g: '')>[
else !.tL"U~4
insertSort(data, mid + 1, r - mid); &"~,V6,q
.&* ({UM
for (i = l; i <= mid; i++) { =DmPPl{
temp = data; (IO\+
} LXTipWKz
for (j = 1; j <= r - mid; j++) { V)WIfRs
temp[r - j + 1] = data[j + mid]; b7>-aem@I
} HzgQI
int a = temp[l]; YKs^%GO+
int b = temp[r]; \pBYWf
for (i = l, j = r, k = l; k <= r; k++) { @@&@}IQcR1
if (a < b) { j:de}!wc
data[k] = temp[i++]; &\WkJ}&PnA
a = temp; n{qa]3
} else { "R\\\I7u
data[k] = temp[j--]; b3y,4ke"
b = temp[j]; fmZzBZ_
} Q9x` Uy
} MZ|c7f&`
} jiw`i
n41\y:CAo
/** {$u@6& B
* @param data gs`27Gih
* @param l FzsS~C$wH{
* @param i K_<lO,[S
*/ <Vr]2mw
private void insertSort(int[] data, int start, int len) { lhIr]'?l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c!(~BH3p
} e5"-4udCn
} ')yF0
} tswG"1R
} F_M~!]<na
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堆排序： (`uC"MLk
o<Rxt *B
package org.rut.util.algorithm.support; ,Rr&.
}ii]cY
import org.rut.util.algorithm.SortUtil; [w#x5Xsn
dTU.XgX)1^
/** k{u%p<
* @author treeroot ]( U%1
* @since 2006-2-2 oN1wrf}Sh
* @version 1.0 l66ipgw_^I
*/ @]VvqCk
public class HeapSort implements SortUtil.Sort{ y!{/'{?P
#Ko+_Hm?4
/* (non-Javadoc) 40l#'< y;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S9ak '
*/ 9{]r+z:
public void sort(int[] data) { ay7+H7^|hZ
MaxHeap h=new MaxHeap(); XM5;AcD
h.init(data); f'zFg["aZS
for(int i=0;i h.remove(); \PtC
System.arraycopy(h.queue,1,data,0,data.length); K&"Pm9
} );/5#b@<Y
RGPU~L
private static class MaxHeap{ e&a[k
"=Fn.r4I
void init(int[] data){ !\D]\|Bo
this.queue=new int[data.length+1]; MkV*+LXC
for(int i=0;i queue[++size]=data; Lh9>8@ jf
fixUp(size); IG3K Pmu
} qNQ3(1xW
} iHG:W wM&
2zrWR%B
private int size=0; nLN6@
qwq+?fj={
private int[] queue; smLDm
}RP9%n^
public int get() { n-| i
return queue[1]; ]@<3 6ByM
} |Nx!g fU
K&a]pL6D
public void remove() { {]_{BcK+
SortUtil.swap(queue,1,size--); cI4qgV
fixDown(1); Z=/L6Zb
} gJ[q {b
file://fixdown 'r?HL;,q
private void fixDown(int k) { MFdFZkpiV
int j; eJ)KE5%n#
while ((j = k << 1) <= size) { 9Nbg@5(
if (j < size %26amp;%26amp; queue[j] j++; TAXkfj
if (queue[k]>queue[j]) file://不用交换 |9i/)LRXe
break; Z_4H2HseL
SortUtil.swap(queue,j,k); uRq#pYn@
k = j; Er+3S@sfq,
} H/la'f#o%
} O |I:[S},
private void fixUp(int k) { m&jt[
while (k > 1) { #/sE{jm
int j = k >> 1; 17[t_T&Ak9
if (queue[j]>queue[k]) M0IqQM57N
break; X|n[9h:%
SortUtil.swap(queue,j,k); VFaK>gQ
k = j; [@?.}!
} RO3e
} 'FA)LuAok
TboHP/
} L!Zxc~
,["|wqM
} d~1"{WPSn
'N,NG$G2
SortUtil： 6Oqnb+
D30Z9_^%:
package org.rut.util.algorithm; %m\G'hY2
LVcy.kU@]
import org.rut.util.algorithm.support.BubbleSort; ppo$&W &z
import org.rut.util.algorithm.support.HeapSort; H=SMDj)s+
import org.rut.util.algorithm.support.ImprovedMergeSort; :x5o3xE
import org.rut.util.algorithm.support.ImprovedQuickSort; Pv$"DEXA2
import org.rut.util.algorithm.support.InsertSort; 6g,3s?aT
import org.rut.util.algorithm.support.MergeSort; d~bH!P
import org.rut.util.algorithm.support.QuickSort; mbG^fy'
import org.rut.util.algorithm.support.SelectionSort; WF.$gBH"
import org.rut.util.algorithm.support.ShellSort; 8_,wOkk_B
exMPw;8
/** y42T.oK8c
* @author treeroot o6yZ@R
* @since 2006-2-2 f%%En5e+
* @version 1.0 8\t7}8f
*/ M #RuI%
public class SortUtil { ~9jP++&
public final static int INSERT = 1; &IPK5o,
public final static int BUBBLE = 2; 73Zs/
public final static int SELECTION = 3; Nm :lC%>X
public final static int SHELL = 4; GN"LU>9|
public final static int QUICK = 5; GQAg ex)D
public final static int IMPROVED_QUICK = 6; ^|12~d_.T
public final static int MERGE = 7; Y%cA2V\#m
public final static int IMPROVED_MERGE = 8; 7Z:l;%]K
public final static int HEAP = 9; P*=3$-`
Jt^JE{m9%
public static void sort(int[] data) { .xQ'^P_q
sort(data, IMPROVED_QUICK); M@ZpgAfq
} <T~fh>a
private static String[] name={ RpXGgw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &XTd[_VW!
}; 8}b[Q/h!
gK_[3FiKt
private static Sort[] impl=new Sort[]{ b6M)qt9R
new InsertSort(), mztq7[&-
new BubbleSort(), 3\~fe/z'I
new SelectionSort(), 3T^dgWXEG
new ShellSort(), >N"PLSY1
new QuickSort(), MBrVh6z>
new ImprovedQuickSort(), F&j|Y>m
new MergeSort(), p" W0$t.
new ImprovedMergeSort(), z`{zqP:
new HeapSort() l]=$<
}; EF{'J8AQ
<g1hdF0
public static String toString(int algorithm){ yFtf~8s3
return name[algorithm-1]; T:5%sN;#O
} siZ_JJW
L. ?dI82c
public static void sort(int[] data, int algorithm) { gx R|S
impl[algorithm-1].sort(data); W 9MZ
} }n8;A;axi
4gt "dfy+
public static interface Sort { ON!G{=7
public void sort(int[] data); l'8wPmy%N
} i_^NbC
I`>%2mP[C
public static void swap(int[] data, int i, int j) { D??/=`|8
int temp = data; dp W%LXM_
data = data[j]; UC$+&&rO
data[j] = temp; q)y8Bv|
} mV]g5>Q\
} [:'?}p