[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; O0s!3hKu
} yn_.
int i1=l; j>uu3ADd2
int i2=mid+1; M_>kefr
for(int cur=l;cur<=r;cur++){ >/lB%<$/
if(i1==mid+1) *'-t_F';
data[cur]=temp[i2++]; s@{~8cHgU
else if(i2>r) ^E:-Uy
data[cur]=temp[i1++]; }`%ks
else if(temp[i1] data[cur]=temp[i1++]; 57 Bx-
else K=nDC.
data[cur]=temp[i2++]; fOME&$=O
} 3HW&\:q5'M
} DHv86TvJt
'W>y v
} <RZqs
}L&LtW{X
改进后的归并排序: 3bR%#G%
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package org.rut.util.algorithm.support; o4J@M{xb_
nc\2A>f`
import org.rut.util.algorithm.SortUtil; 0:<Y@#L
.Eb]}8/}E
/** ~PpDrJ; Va
* @author treeroot 4*Gv0#dga
* @since 2006-2-2 I%GQ3D"=
* @version 1.0 j"aY\cLr t
*/ )tnbl"0
public class ImprovedMergeSort implements SortUtil.Sort { 4y?n62N8$
C/#pK2xY
private static final int THRESHOLD = 10; c:&8B/
\7>*ULP
/* NO@`*:.^Y
* (non-Javadoc) tf|;'Nc6
* xkax
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i3Bpim.
*/ DwZRx@
public void sort(int[] data) { URg;e M#
int[] temp=new int[data.length]; :#35mBe}k
mergeSort(data,temp,0,data.length-1); &;)B qqXc
} K~I?i/P=z
>]xW{71F@
private void mergeSort(int[] data, int[] temp, int l, int r) { `]]<.>R
int i, j, k; Y6Cm PxOQ
int mid = (l + r) / 2; TI/RJF b
if (l == r) &vt)7[
return; HGh -rEh
if ((mid - l) >= THRESHOLD) H{,1-&>|
mergeSort(data, temp, l, mid); "DfjUk
else (V\N1T,f
insertSort(data, l, mid - l + 1); P}UxA!
if ((r - mid) > THRESHOLD) H9_iTGBQ
mergeSort(data, temp, mid + 1, r); 2f@Cy+W'[
else m'"H1~BW
insertSort(data, mid + 1, r - mid); l>`66~+s,`
}^$1<GT
for (i = l; i <= mid; i++) { 79@CO6
temp = data; B{D4.!a
} a:`<=^:4,
for (j = 1; j <= r - mid; j++) { a$Y{ut0t(
temp[r - j + 1] = data[j + mid]; T*PEUq
} dcD#!v\0
int a = temp[l]; kWVk^,
int b = temp[r]; iLNUydiS
for (i = l, j = r, k = l; k <= r; k++) { [ }Tb2|
if (a < b) { b1jDbiH&
data[k] = temp[i++]; k ,+,,W
a = temp; PnInsf%;
} else { q5=,\S3=
data[k] = temp[j--]; ]1Wxa?
b = temp[j]; zrG
} VPuR4p.
} CfP-oFHoQ
} 3S]QIZ1
%.r\P@7/Q
/** p9u*l
* @param data A%HIfSzQBS
* @param l $p4e8j[EJ
* @param i k'H[aYMA
*/ 6kLy!QS
private void insertSort(int[] data, int start, int len) { /j}Tv.'d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +Ln^<!P
} GD]epr%V
} ".$kOH_:
} 'j, ([
} 0XCAnMVo
6QbDU[
堆排序： LjE3|+pJ
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package org.rut.util.algorithm.support; jll:Rh(b
,>7dIJqzw
import org.rut.util.algorithm.SortUtil; "0[`U(/
:r hB=
/** <I tS_/z
* @author treeroot f_[dFKoX
* @since 2006-2-2 u/6if9B
* @version 1.0 9N)I\lcY
*/ %_4#WI
public class HeapSort implements SortUtil.Sort{ kk6 !krZ
M!Ao!D[
/* (non-Javadoc) GdNhEv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rf4f'cUa
*/ y&5 O)
public void sort(int[] data) { cnQ2/ZZp~
MaxHeap h=new MaxHeap(); 3~Fag1Hp
h.init(data); Fj~suZ`
for(int i=0;i h.remove(); 1G5AL2
System.arraycopy(h.queue,1,data,0,data.length); G$V=\60a-
} `x#S.b
.24z+|j
private static class MaxHeap{ av|T|J/(
hk:>*B}
void init(int[] data){ sL~4~178
this.queue=new int[data.length+1]; !E?+1WDS0
for(int i=0;i queue[++size]=data; E>tHKNyVTp
fixUp(size); JfSe; v
} zQ{bMj<S
} Wq<oP
FI[BZZW
private int size=0; QY&c=bWAX"
@W/k}<07
private int[] queue; p|A ?F0
JN+7oh]u
public int get() { p<L{e~{!7f
return queue[1]; l~o!(rpX
} ?2~fvMWu
[1kQ-Ko`
public void remove() { 0>td[f
SortUtil.swap(queue,1,size--); XWS]4MB+vm
fixDown(1); |TMn
} 'q$Ym0nL
file://fixdown MJ?t{=
private void fixDown(int k) { vbeE}7 *2
int j; jIe /X]
while ((j = k << 1) <= size) { ~ E6e~
if (j < size %26amp;%26amp; queue[j] j++; y.D+M$f
if (queue[k]>queue[j]) file://不用交换 NWFh<
break; z=U+FHdh/-
SortUtil.swap(queue,j,k); hIV]ZYbH
k = j; 6JZ>&HA
} E9j<+Ik
} -_5Dk'R#`
private void fixUp(int k) { ZM-P
while (k > 1) { :2S?|7U4
int j = k >> 1; L+%kibnY'
if (queue[j]>queue[k]) Os$E,4,py
break; kOD=H-vSi
SortUtil.swap(queue,j,k); 8}:$=n4&
k = j; Y0|){&PCt
} iY07lvG<
} C/Z#NP~ *
;BH.,{*@B
} .G\](%
wods
} /KOI%x
u_' -vZ_
SortUtil： t*H2;|zn_
y@I9>}"y
package org.rut.util.algorithm; ):>?N`{V
k6ry"W3
import org.rut.util.algorithm.support.BubbleSort; YAT@xZs-
import org.rut.util.algorithm.support.HeapSort; mih}?oi
import org.rut.util.algorithm.support.ImprovedMergeSort; )2ShoFF
import org.rut.util.algorithm.support.ImprovedQuickSort; v5a\}S<(
import org.rut.util.algorithm.support.InsertSort; Ly8=SIZ
import org.rut.util.algorithm.support.MergeSort; bHRn}K+<}c
import org.rut.util.algorithm.support.QuickSort; xJ{r9~
import org.rut.util.algorithm.support.SelectionSort; W;7$Dq:
import org.rut.util.algorithm.support.ShellSort; mwLf)xt0'
96~y\X@x
/** LJPJENtFIs
* @author treeroot "zY~*3d
* @since 2006-2-2 (BPp2^
* @version 1.0 +%\Ci!%b
*/ CqC )H7A
public class SortUtil { $eI cCLF
public final static int INSERT = 1; K)>F03=uE
public final static int BUBBLE = 2; K<5yjG8&
public final static int SELECTION = 3; X/:V{2
public final static int SHELL = 4; &}e>JgBe0
public final static int QUICK = 5; ,NZllnW
public final static int IMPROVED_QUICK = 6; ANBuX6q
public final static int MERGE = 7; EIQ3vOq6
public final static int IMPROVED_MERGE = 8; fiWN^sTM
public final static int HEAP = 9; X[dfms;H
;-~E!_$
public static void sort(int[] data) { ohKoX$|p~
sort(data, IMPROVED_QUICK); JYw?
} _"Ym]y28li
private static String[] name={ DKfpap}8u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5|~g2Zz{;
}; qqZ4K:oC,
fTPm Fb
private static Sort[] impl=new Sort[]{ >Z_;ZMu)
new InsertSort(), tkk8b6%h?p
new BubbleSort(), o"X..m<
new SelectionSort(), pp(09y`]
new ShellSort(), =Mwuhk|*
new QuickSort(), q:)PfP+
new ImprovedQuickSort(), KZ[TW,Gw
new MergeSort(), |s/N?/qi
new ImprovedMergeSort(), Nkj$6(N=zJ
new HeapSort() 2! ,ndLA
}; 9Jh&C5\\
0~BaQ, A@
public static String toString(int algorithm){ 7O*Sg2B
return name[algorithm-1]; ?sdSi--
} tDL.+6/
qypF}Pw
public static void sort(int[] data, int algorithm) { cKkH*0B5
impl[algorithm-1].sort(data); WZ6{9/%:
} SS%Bde&<{
]N]Fb3
public static interface Sort { 9FSa=<0wE
public void sort(int[] data); mB>0$l y
} 9HFEp-"
e< @$(w
public static void swap(int[] data, int i, int j) { KPz0;2}
int temp = data; 6T4DuF
data = data[j]; "Y:>^F;
data[j] = temp; &Wa3/mWK
} ; k.@=
} ui)mYR[8X