[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; 2kzm(K
} lK;|ciq"c7
int i1=l; 89e<,f`h
int i2=mid+1; -L%tiz`_
for(int cur=l;cur<=r;cur++){ 3qwi)nm
if(i1==mid+1) w/BaaF.0
data[cur]=temp[i2++]; _^]2??V
else if(i2>r) -7,xjn
data[cur]=temp[i1++]; ;*>Y8^K&Q
else if(temp[i1] data[cur]=temp[i1++]; i%w[v_j
else j;6kN-jx
data[cur]=temp[i2++]; M6l S2
} {_T?0L
} Teh _
0aj4.H*%
} gg $/
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改进后的归并排序: mucKmb/
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package org.rut.util.algorithm.support; =kFZ2/P2t(
u}Kc>/AF
import org.rut.util.algorithm.SortUtil; #~QkS_
xc{$=>'G
/** m%au* 0p
* @author treeroot "=8= G
* @since 2006-2-2 uflRW+-2
* @version 1.0 Mtxn@m{i;"
*/ }8tD|t[
public class ImprovedMergeSort implements SortUtil.Sort { a^/j&9
3"afrA
private static final int THRESHOLD = 10; d h5%
/`$9H|
/* q$IgkL
* (non-Javadoc) Jd#g"a>zZ
* zv/owK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x[L/d"Wf
*/ >F7v'-*{
public void sort(int[] data) { vU|=" #
int[] temp=new int[data.length]; |hGi8
mergeSort(data,temp,0,data.length-1); y/{&mo1\
} <uq#smY
wP:ab
private void mergeSort(int[] data, int[] temp, int l, int r) { BO]}E:C9
int i, j, k; e+416 ~X v
int mid = (l + r) / 2; X'[93 C|K
if (l == r) sX_6qKUH
return; a(cZ]`s]*
if ((mid - l) >= THRESHOLD) JSO'. [N
mergeSort(data, temp, l, mid); (rFXzCI
else `wrN$&
insertSort(data, l, mid - l + 1); +2Xq+P
if ((r - mid) > THRESHOLD) wP-BaB$_
mergeSort(data, temp, mid + 1, r); =6Z$nc R
else ]H[%PQ r`Z
insertSort(data, mid + 1, r - mid); :x*#RnRr.
U42B(ow
for (i = l; i <= mid; i++) { ? }t[
temp = data; &4]~s:F
} #i6ZY^+ee
for (j = 1; j <= r - mid; j++) { Iq/V[v
temp[r - j + 1] = data[j + mid]; Owt|vceT
} zNg8Oq&
int a = temp[l]; 67,@*cK3?J
int b = temp[r]; `]*BDSvE
for (i = l, j = r, k = l; k <= r; k++) { 7l+>WB_]
if (a < b) { %N.qu_,IZ
data[k] = temp[i++]; +2&+Gh.h
a = temp; +,wCV2>\3
} else { uPZ<hG#K
data[k] = temp[j--]; 78o>UWA:
b = temp[j]; GJLe733o
} `)Z+]5:
} DMeP9D
} ^j-w^)@T
zI$24L9*
/** &n 1 \^:
* @param data $)(K7> P
* @param l ItLP&S=
* @param i LA\)B"{J
*/ .LQvjK[N
private void insertSort(int[] data, int start, int len) { @ckOLtxE>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e3YdHp
} +#$(>6Zu"{
} !/]vt?v#^
} (j*1sk
} .PAR
4I %/}+Q
堆排序： I[td:9+hK@
uW@o,S0:
package org.rut.util.algorithm.support; 6<%W8m\
e 9p+
import org.rut.util.algorithm.SortUtil; t93iU?Z
wfE%` 1
/** Z{#;my*X|
* @author treeroot QAI!/bB
* @since 2006-2-2 vbn'CY]QU
* @version 1.0 Gd=l{~
*/ (txr%Z0E
public class HeapSort implements SortUtil.Sort{ 9gS.G2
B^{87YR
/* (non-Javadoc) +0)zB;~7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F~qiNV
*/ VlLc[eVV
public void sort(int[] data) { !"dn!X
MaxHeap h=new MaxHeap(); 9[L@*7A`m
h.init(data); ?M02|8-
for(int i=0;i h.remove(); UN,y/V
System.arraycopy(h.queue,1,data,0,data.length); Xfq]vQ/{
} ]n/fB|tE
l>H G|ol
private static class MaxHeap{ pN]$|#%q(
@X\2K?c(v
void init(int[] data){ T@. $Zpz
this.queue=new int[data.length+1]; q1d'L*
for(int i=0;i queue[++size]=data; o{QU?H5h
fixUp(size); Ku W$
} `/1Zy}cD
} ^KK9T5H
8N58w)%7`
private int size=0; xUG:x4Gz+
4h[S`;D0Vf
private int[] queue; RR8Z 9D;
Nvef+L,v
public int get() { 4_A9o9&_Rh
return queue[1]; `6t3D&.u0
} 1|PmZPKq9n
#h#Bcv0 Z
public void remove() { %s#`i$|z*n
SortUtil.swap(queue,1,size--); >Za66<:
fixDown(1); qL\*rYe<
} GA8cA)]zOD
file://fixdown Ul EP;
private void fixDown(int k) { &dC #nw
int j; @3UVl^T
while ((j = k << 1) <= size) { =XT'D@q~W
if (j < size %26amp;%26amp; queue[j] j++; wu2AhMGmw
if (queue[k]>queue[j]) file://不用交换 h/CF^0m"!
break; $_.m<
SortUtil.swap(queue,j,k); gUrb&#\X
k = j; TF@HwF"#
} i"rrM1/r
} 0M?nXHA[
private void fixUp(int k) { BBg&ZIYEh
while (k > 1) { u D.E>.B
int j = k >> 1; K7x,>
if (queue[j]>queue[k]) 7 %P?3
break; x%;Q /7&$
SortUtil.swap(queue,j,k); cZ" Ut
k = j; ;5*)kX
} `P`nqn
} GM/3*S$c
>e4
} ]Mh7;&<6[
!n`ogzOh
} 1m/=MET]
o3;u*f0rWn
SortUtil： zr0_SCh;2
))n7.pB9/
package org.rut.util.algorithm; r: _-Cj
?-FSDNQ
import org.rut.util.algorithm.support.BubbleSort; ;z9(
import org.rut.util.algorithm.support.HeapSort; zS:89y<
import org.rut.util.algorithm.support.ImprovedMergeSort; "9[K
import org.rut.util.algorithm.support.ImprovedQuickSort; /~_Cb=7
import org.rut.util.algorithm.support.InsertSort; f77uqv(Y
import org.rut.util.algorithm.support.MergeSort; VA _O0y2
import org.rut.util.algorithm.support.QuickSort; cJ&e^$:Er
import org.rut.util.algorithm.support.SelectionSort; Zq|oj^
import org.rut.util.algorithm.support.ShellSort; JlsRP
b; SFnZa8
/** blZiz2F
* @author treeroot 5 TD"
* @since 2006-2-2 qYFol#=%
* @version 1.0 3zb;q@JV
*/ B{ NKDkDH
public class SortUtil { 2#'[\*2|N
public final static int INSERT = 1; #K7i<Bf
public final static int BUBBLE = 2; Tk-PCra
public final static int SELECTION = 3; {6<7M
public final static int SHELL = 4; H^Xw<Z=
public final static int QUICK = 5; -A9 !Y{Z
public final static int IMPROVED_QUICK = 6; }>xgzhdT
public final static int MERGE = 7; n@BE*I<"
public final static int IMPROVED_MERGE = 8; )2oWoZvi9
public final static int HEAP = 9; T\:3(+uK
tc@U_>{
public static void sort(int[] data) { pFSVSSQRV|
sort(data, IMPROVED_QUICK); w\;=3C`
} 0$,Ag;"^?
private static String[] name={ #;H,`r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +byw*Kk
}; %H-[u}s
n/s!S &
private static Sort[] impl=new Sort[]{ 'N5qX>Ob
new InsertSort(), | qHWM
new BubbleSort(), 8N6a=[fv<
new SelectionSort(), h^>kjMM
new ShellSort(), nl5K1!1
new QuickSort(), |1 is!leP
new ImprovedQuickSort(), ;FZ\PxN
new MergeSort(), m[oe$yH
new ImprovedMergeSort(), dqUhp_f2qK
new HeapSort() *^c4q|G.-
}; @D"#B@j
$EviGZFAaR
public static String toString(int algorithm){ X@9_ukdpu
return name[algorithm-1]; }#<Sq57n
} z}C#+VhQ`
I2j;9Qcz
public static void sort(int[] data, int algorithm) { 2t[c^J
impl[algorithm-1].sort(data); u{H,i(mx?
} U]hQ#a+
9z'</tJ`
public static interface Sort { rxa"ji!)
public void sort(int[] data); bq[Q
} 83i%3[L
T,7Y7MzF
public static void swap(int[] data, int i, int j) { bHS2;K~
int temp = data; mu"]B]
data = data[j]; IH~H6US
data[j] = temp; h*%T2
} ;\<?LTp/r
} lBG*P>;