[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; BGfzslK
} y8DhOlewQ
int i1=l; ZIF49`Y4TF
int i2=mid+1; 12+>5BA
for(int cur=l;cur<=r;cur++){ FKmFo^^0
if(i1==mid+1) ?C/Te)
data[cur]=temp[i2++]; JwXT%op9RP
else if(i2>r) `[n("7,
data[cur]=temp[i1++]; v~Y^r2
else if(temp[i1] data[cur]=temp[i1++]; +[tP_%/r'^
else uyY|v$FM
data[cur]=temp[i2++]; ^7Fh{q4IE
} 5+wAzVA
} |ely|U. Tf
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} 7>~5jYP
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改进后的归并排序: jkvgoxY
tzh1s i
package org.rut.util.algorithm.support; 2rZxSg
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import org.rut.util.algorithm.SortUtil; {+@bZ}57
~_!F01s
/** L/z),#
* @author treeroot +U3m#Y)k
* @since 2006-2-2 ZR'H\Z
* @version 1.0 i _%Q`i
*/ s@7H1)U
public class ImprovedMergeSort implements SortUtil.Sort { )sT> i
/7YF mI/0
private static final int THRESHOLD = 10; YSe.t_K2C
9tqF8pb7v
/* PV=5UyjW
* (non-Javadoc) tq|hPd<C
* @i*|s~15
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mN19WQ(r
*/ lMbAs.!
public void sort(int[] data) { Q0ON9gqqv
int[] temp=new int[data.length]; \0gM o&
mergeSort(data,temp,0,data.length-1); #KiRfx4G
} k Zq!&
&EnuE0BD
private void mergeSort(int[] data, int[] temp, int l, int r) { cx0*X*
int i, j, k; BGu?<bET
int mid = (l + r) / 2; a 7,C>%I
if (l == r) AoI/n4T^
return; g"> {9YE
if ((mid - l) >= THRESHOLD) # m *J&
mergeSort(data, temp, l, mid); :dqn h
else =i7`ek
insertSort(data, l, mid - l + 1); ziCHjqT
if ((r - mid) > THRESHOLD) ,YMp<C
mergeSort(data, temp, mid + 1, r); aT$9;
else Xqm::1(-(
insertSort(data, mid + 1, r - mid); 'uxX5k/D@t
s]JF0584
for (i = l; i <= mid; i++) { _> *jH'
temp = data; !U~WK$BP
} $ <#KA3o\
for (j = 1; j <= r - mid; j++) { 8M`#pN^
temp[r - j + 1] = data[j + mid]; HF.^ysI
} E2{FK)qT
int a = temp[l]; ({=gw9f
int b = temp[r]; [bk?!0]aV
for (i = l, j = r, k = l; k <= r; k++) { !dC<4qZ\C
if (a < b) { h|"9LU4a
data[k] = temp[i++]; #gcF"L||
a = temp; 1wP-
} else { #"5 Dk#@
data[k] = temp[j--]; 5EebPXBzB
b = temp[j]; $+I;oHWI
} ^~A>8CQOU
} bG(3^"dS
} AlIpsJ[UU
ut I"\1hQ
/** Aj4T"^fv
* @param data gE?|_x#
* @param l ?n ZY)
* @param i d|yAs5@
*/ }-6)gWe
private void insertSort(int[] data, int start, int len) { }-sdov<<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +qwjbA+
} L-k@-)98
} ynhmMy%
} V:c;-)(
} "PpN0Rr
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堆排序： TBT:/Vfun
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package org.rut.util.algorithm.support; 7!JQB
WV_.Tiy<
import org.rut.util.algorithm.SortUtil; *N<&GH(j
O|M{-)
/** BjzPz
* @author treeroot 6Z%U`,S
* @since 2006-2-2 sU{NHC)5
* @version 1.0 vsl]92xI
*/ c>)Yt^q&K
public class HeapSort implements SortUtil.Sort{ d>t<_}
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/* (non-Javadoc) AQ[GO6$,%H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C .~+*"Vw
*/ ^i} L-QR
public void sort(int[] data) { yLQ*"sw\
MaxHeap h=new MaxHeap(); x-?Sn' m
h.init(data); Cy=Hy@C
for(int i=0;i h.remove(); dKxyA"@
System.arraycopy(h.queue,1,data,0,data.length); _`:1M2=
} bq:(u4 3
I\$X/t +dH
private static class MaxHeap{ Nu?-0>
K%RxwM
void init(int[] data){ #a8B/-
this.queue=new int[data.length+1]; VN\W]jT
for(int i=0;i queue[++size]=data; (j3xAA
fixUp(size); YS*9t Q{
} -3=#u_
} ?qWfup\S
@6]sNm
private int size=0; L$E{ycn
>)M`IU[d^.
private int[] queue; --c"0,7
$NZ-{dY{
public int get() { B2'i7Ps
return queue[1]; EKsT~SS
} ;k>&FWEG
|~vI3]}fx
public void remove() { .w8J*JZ
SortUtil.swap(queue,1,size--); \S!e![L/
fixDown(1); wlqpn(XR
} esMX-.8Cx
file://fixdown ap+JQ@b
private void fixDown(int k) { Z*= $8e@
int j; x?2@9u8Yb
while ((j = k << 1) <= size) { R&BTA
if (j < size %26amp;%26amp; queue[j] j++; L'0B$6
if (queue[k]>queue[j]) file://不用交换 OZ~5*v
break; )6D,d5<
SortUtil.swap(queue,j,k); :i.{
k = j; Wg<(ms dj
} h_+dT
} s)6U_
private void fixUp(int k) { \(^nSy&N
while (k > 1) { 5a|w+HO,
int j = k >> 1; z;|A(*Y
if (queue[j]>queue[k]) rFj-kojg
break; vPTM
SortUtil.swap(queue,j,k); |w<H!lGe!$
k = j; 2;DuHO1
} D)m5
} =06gj)8
@c;|G$E@3
} J:V6
ZL&g_jC
} W;!}#o|%s
lrIS{MJ+-
SortUtil： &)AVzN+*h
j)/nKh4O
package org.rut.util.algorithm; c*L0@Ak%
YSTv\y
import org.rut.util.algorithm.support.BubbleSort; 6sx'S?Qa*
import org.rut.util.algorithm.support.HeapSort; mR?5G:W~R
import org.rut.util.algorithm.support.ImprovedMergeSort; 9NQlI1Wz4
import org.rut.util.algorithm.support.ImprovedQuickSort; 5#+^E{
import org.rut.util.algorithm.support.InsertSort; !y@NAa0
import org.rut.util.algorithm.support.MergeSort; sP;nGQ.eN
import org.rut.util.algorithm.support.QuickSort; %}Ss,XJ
import org.rut.util.algorithm.support.SelectionSort; x:7b/j-
import org.rut.util.algorithm.support.ShellSort; !`,Sfqij
QD:{U8YbF$
/** LXC9I/j/
* @author treeroot 7|$:=4
* @since 2006-2-2 pEIRh1
* @version 1.0 GS a[ oh
*/ )GM41t1i
public class SortUtil { [BqHx5Xz(
public final static int INSERT = 1; z8SmkL
public final static int BUBBLE = 2; e%@~MQ-
public final static int SELECTION = 3; 6/r)y+H
public final static int SHELL = 4; +#lM
public final static int QUICK = 5; ^h~x)@=
public final static int IMPROVED_QUICK = 6; `lO[x.[
public final static int MERGE = 7; kT"Kyd
public final static int IMPROVED_MERGE = 8; +'I+o5*
public final static int HEAP = 9; B&[M7i
W;'!gpa
public static void sort(int[] data) { VcSVu
sort(data, IMPROVED_QUICK); \KQ71yqY
} +zaA,e?\
private static String[] name={ w35J.zn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a1+#3X.
}; T"E6y"D
i+S) K
private static Sort[] impl=new Sort[]{ %S*{9hm/
new InsertSort(), 'rO!AcdLU
new BubbleSort(), WaVtfg$!
new SelectionSort(), V'8s8H
new ShellSort(), <SgM@0m
new QuickSort(), &]v4@%<J
new ImprovedQuickSort(), vY${;#~|
new MergeSort(), R`DKu=
new ImprovedMergeSort(), Nn~~!q
new HeapSort() jr /pj?
}; x7:s]<kE
/H(? 2IHC
public static String toString(int algorithm){ cDFO;Dr
return name[algorithm-1]; %)|9E>fP]N
} bF"G[pD
A+"ia1p,}
public static void sort(int[] data, int algorithm) { bm?sbE
impl[algorithm-1].sort(data); T>x&T9
} K;>9ZZtl
v9w'!C)b
public static interface Sort { AX;8^6.F3
public void sort(int[] data); 0?\Zm)Q~(
} C":32_q
Gb#Cm]
public static void swap(int[] data, int i, int j) { >L;eO'D
int temp = data; *W0y: 3dB3
data = data[j]; kI 4MiK
data[j] = temp; Bm.:^:&k
} #fM#p+v
} `e}bdj