[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; P3|<K-dFAK
} ujh4cp
int i1=l; &tOD
int i2=mid+1; ;(,Fe/wvC
for(int cur=l;cur<=r;cur++){ aRwBxf
if(i1==mid+1) 'ng/A4
data[cur]=temp[i2++]; }<S2W\,G
else if(i2>r) #lC{R^SL
data[cur]=temp[i1++]; -XyuA:pxx
else if(temp[i1] data[cur]=temp[i1++]; H}~^,B2;
else .KSGma6]
data[cur]=temp[i2++]; <KA@A}
} /W>"G1)
} ZM.g+-9
6;*(6$;
} {cI<4><
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改进后的归并排序: *~L]n4-
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package org.rut.util.algorithm.support; X9j+$X\j
=R"tnjR
import org.rut.util.algorithm.SortUtil; $gTPW,~s[
5S?yj
/** 463dLEd
* @author treeroot }{y$$X<:
* @since 2006-2-2 BSf"'0I&
* @version 1.0 [ub\DLl
*/ \nWpV7TSN
public class ImprovedMergeSort implements SortUtil.Sort { (jG$M=q-
J_@4J7
private static final int THRESHOLD = 10; M2S|$6t:
GZt] 38V)g
/* Jx<
* (non-Javadoc) -tdG}Gu
* )]R?v,9*D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tK H!xit
*/ 6KG63`aQ
public void sort(int[] data) { WGx>{'LJ
int[] temp=new int[data.length]; y|se^dn
mergeSort(data,temp,0,data.length-1); Hdx|k=-Q^
} (ce NVo&
NZ5~\k
private void mergeSort(int[] data, int[] temp, int l, int r) { nE;gM1I
int i, j, k; sCl,]g0{
int mid = (l + r) / 2; IycxRig
if (l == r) QR'g*Bro
return; kDh(~nfj
if ((mid - l) >= THRESHOLD) bYc qscW
mergeSort(data, temp, l, mid); HWBom8u0
else O2dgdtm
insertSort(data, l, mid - l + 1); B vc=gW
if ((r - mid) > THRESHOLD) 6%#'X
mergeSort(data, temp, mid + 1, r); tV9C33
else a)Ek~{9
insertSort(data, mid + 1, r - mid); B;r$( 'UZ
yFo5pKF.J
for (i = l; i <= mid; i++) { eHe /w9`$R
temp = data; `qz5rPyZ
} {eEWfMKIn
for (j = 1; j <= r - mid; j++) { GcCs}(eo
temp[r - j + 1] = data[j + mid]; _'U?!
} xk8p,>/
int a = temp[l]; dCTpO
int b = temp[r]; P0z{R[KBH
for (i = l, j = r, k = l; k <= r; k++) { =[+&({
if (a < b) { 5#\p>}[HG
data[k] = temp[i++]; u_8 22Z
a = temp; NGUGN~p
} else { {B.]w9
data[k] = temp[j--]; y3]"H(
b = temp[j]; %ko 8P
} mU$7_7V~
} vKC&Qi ;
} HPKyAcS\
vq7%SEkES
/** v6\2mc.
* @param data 3+5\xRq
* @param l i%8&g2
* @param i J*X.0&Toc
*/ J9.p8A^^2
private void insertSort(int[] data, int start, int len) { E(_I3mftm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nk 9 K\I
} reJ?38(
} m0\}Cc
} vPNZFi-(
} =Gz>ZWF
,{*fOpn
堆排序： QvN <uxm
KB*=a
package org.rut.util.algorithm.support; 7=A9E]:
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import org.rut.util.algorithm.SortUtil; F|`B2Gr
[#'_@zZz
/** Qmx~_
* @author treeroot >%dAqYi $
* @since 2006-2-2 ibs"Iv34
* @version 1.0 no6]{qn=6
*/ rxp9B>~
public class HeapSort implements SortUtil.Sort{ 1/+r?F3
1>x@1Mo+K
/* (non-Javadoc) Vzvw/17J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g*r;( H>e
*/ B^~Bv!tHWr
public void sort(int[] data) { _hL4@C
MaxHeap h=new MaxHeap(); gr{Sh`Cm-
h.init(data); 3|r!*+.
for(int i=0;i h.remove(); pY>-N
System.arraycopy(h.queue,1,data,0,data.length); G0Tc}_o<Y
} V9+"CB^
Sc3M#qm_
private static class MaxHeap{ E(+wl
,<r3Z$G
void init(int[] data){ "sX?wTag
this.queue=new int[data.length+1]; SJ7=<y}[d
for(int i=0;i queue[++size]=data; <?Izfl6
fixUp(size); ~<[5uZIo
} KqUSTR1e[
} @/NZ>.
i=H>D
private int size=0; H6S vU
gs8@b5 RSb
private int[] queue; 9Sl|l.;!
XfK.Fj~-
public int get() { `oRs-,d|<
return queue[1]; 8yz((?LrDh
} &|"I0|tJ
'!h0![OH
public void remove() { (DP9& b
SortUtil.swap(queue,1,size--); MGyB8(
fixDown(1); KXA)i5z
} l@/kPEh
file://fixdown aC Lg~g4
private void fixDown(int k) { 7oLf5V1~
int j; }\L!;6oy
while ((j = k << 1) <= size) { yxWMatZ2
if (j < size %26amp;%26amp; queue[j] j++; =,8Eo"~\
if (queue[k]>queue[j]) file://不用交换 b<V./rWIB
break; nEcd+7(
SortUtil.swap(queue,j,k); 7RC096 ?}
k = j; Il`k]XM
} "mK i$FV
} o``>sBZOq
private void fixUp(int k) { /A))"D
while (k > 1) { >AX~c jo
int j = k >> 1; ;(0$~O$3u
if (queue[j]>queue[k]) AD%D ,l
break; Dzjt|U0ru9
SortUtil.swap(queue,j,k); \j})Kul
k = j; bd P,Zqd
} {!eANm'
} X<}o> 6|d
agU!D[M_G
} :8-gm"awL5
XL/oy'_
} rbuL@=S@*
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SortUtil： bb/?02*)H
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package org.rut.util.algorithm; l8AEEG8>
ZIL| .<8I
import org.rut.util.algorithm.support.BubbleSort; n$|c{2]=
import org.rut.util.algorithm.support.HeapSort; zvb}p
import org.rut.util.algorithm.support.ImprovedMergeSort; 9C)3 b3
import org.rut.util.algorithm.support.ImprovedQuickSort; /b:t;0G
import org.rut.util.algorithm.support.InsertSort; i Kk"j
import org.rut.util.algorithm.support.MergeSort; +=~%S)9F
import org.rut.util.algorithm.support.QuickSort; O:^LQ
import org.rut.util.algorithm.support.SelectionSort; zPh\3B
import org.rut.util.algorithm.support.ShellSort; 5H:~6z
X*9N[#wu6
/** }wOpPN[4
* @author treeroot :{WrS
* @since 2006-2-2 'bI~61{A
* @version 1.0 }B9~X
*/ P&%eIgAOL
public class SortUtil { "$IXZ
public final static int INSERT = 1; =i^<a7M~
public final static int BUBBLE = 2; 4,F3@m:<
public final static int SELECTION = 3; 9kX=99kf[
public final static int SHELL = 4; D@\;@( |
public final static int QUICK = 5; H9san5{
public final static int IMPROVED_QUICK = 6; |!?WQ[
public final static int MERGE = 7; "ryk\}*<
public final static int IMPROVED_MERGE = 8; ^L-w(r62<
public final static int HEAP = 9; k8 ;uC~L
;64mf`
public static void sort(int[] data) { 4]aiT8))
sort(data, IMPROVED_QUICK); 0oj{e9h
} }\u%)uZ
private static String[] name={ h#m:Y~GoF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $#!UGY
}; .Y(lB=pV
Z2rzb{oS}
private static Sort[] impl=new Sort[]{ << ;HY}s
new InsertSort(), 7{An@hNh
new BubbleSort(), LZc$:<J<6
new SelectionSort(), WfDX"rA
new ShellSort(), M,t*nG
new QuickSort(), C3\E.u?
new ImprovedQuickSort(), "<w2v'6S
new MergeSort(), M.)}e7
new ImprovedMergeSort(), ^6aS]t
new HeapSort() h^A3 0f_x
}; pFJQ7Jlx
! FR%QGn1
public static String toString(int algorithm){ 6mu<&m@
return name[algorithm-1]; Ob8B
} sCF40AoY&
Zgg'9E
public static void sort(int[] data, int algorithm) { gmRT1T
impl[algorithm-1].sort(data); Ki/'Ic1
} 2sqm7th
bbNU\r5%
public static interface Sort { ]dHB}
public void sort(int[] data); &v$,pg%-:
} Lvi[*une|
^IVe[P'
public static void swap(int[] data, int i, int j) { &@% b?~
int temp = data; ZMoJ#p(
data = data[j]; ^KkRF":
data[j] = temp; @q&|MMLt
} ?L@@;tt
} WDEe$k4.