[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; w~bG<kxP
} z2rQ$O-#
int i1=l; `Mo~EHso.
int i2=mid+1; r0~7v1rG
for(int cur=l;cur<=r;cur++){ 2Som0T<2
if(i1==mid+1) B=Xnv*e
data[cur]=temp[i2++]; wlm3~B\64
else if(i2>r) sqm%iyC=q
data[cur]=temp[i1++]; 2AdX)iF@
else if(temp[i1] data[cur]=temp[i1++]; lH6Cd/a
else ph Wc8[Q
data[cur]=temp[i2++]; :GN)7|:
} ~|X99?P
} Xulh.:N}
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} >g5T;NgH9
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改进后的归并排序: G/x3wR
bl(BA}<
package org.rut.util.algorithm.support; @"q~AY
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import org.rut.util.algorithm.SortUtil; PiIp<fJd$
^U0apI
/** yC9:sQ'k
* @author treeroot X;K8,A7`
* @since 2006-2-2 `77;MGg*
* @version 1.0 v&t`5-e-A
*/ OhA^UP01-
public class ImprovedMergeSort implements SortUtil.Sort { p[ks} mca@
rC=p;BC@dD
private static final int THRESHOLD = 10; ;cS~d(%
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/* @oe3i
* (non-Javadoc) "cnG/{($*
* +=n x|:no
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #J%h!#3g
*/ v:'P"uU;4
public void sort(int[] data) { X}65\6
int[] temp=new int[data.length]; #Z2>TN
mergeSort(data,temp,0,data.length-1); i~v@
} [8V(N2
b?+Yo>yF8
private void mergeSort(int[] data, int[] temp, int l, int r) { 9*GL@_c
int i, j, k; sg!=Q+
int mid = (l + r) / 2; c]cO[T_gGa
if (l == r) J@u!S~&r
return; S>/I?(J
if ((mid - l) >= THRESHOLD) +1JZB*W
mergeSort(data, temp, l, mid); =$:4v`W0(
else Y\\3g_YBF
insertSort(data, l, mid - l + 1); b&U5VA0=1
if ((r - mid) > THRESHOLD) A-AN6.
mergeSort(data, temp, mid + 1, r); `4"y#Z
else 6Dr$*9
insertSort(data, mid + 1, r - mid); U 8qKD
EkfGw/WDw
for (i = l; i <= mid; i++) { ^c;skV&S
temp = data; (HTk;vbZm
} %k1q4qOG]^
for (j = 1; j <= r - mid; j++) { oKMg7 3*
temp[r - j + 1] = data[j + mid]; |-cALQ
} b&|YQW}~
int a = temp[l]; hc@;}a\Y
int b = temp[r]; (rY1O:*S
for (i = l, j = r, k = l; k <= r; k++) { Oy?iAQ+
if (a < b) { LyCV_6;D
data[k] = temp[i++]; R'1vjDuv
a = temp; -\sKSY5{R
} else { ?j^?@%f0
data[k] = temp[j--]; X*p:&=o
b = temp[j]; #nMP(ShK
} hg86#jq%
} |Ls&~'ik
} 8WLh]MD`
^<5^9]x
/** '3Lx!pMhN
* @param data %n V@'3EI
* @param l r*
* @param i sDh6 Uk
*/ v J,xz*rc`
private void insertSort(int[] data, int start, int len) { J&] XLr.j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ['9OGV\
} a#^4xy:
} `OF;>u*:
} BZ'y}Zu*
} #L+s%OJ`
o^.s!C%j
堆排序： ,XF6Xsg2
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package org.rut.util.algorithm.support; lw/ m0}it
;jY'z5PH5
import org.rut.util.algorithm.SortUtil; wtgO;w
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/** Liz6ob
* @author treeroot y(p:)Iv
* @since 2006-2-2 "b+3 &i|
* @version 1.0 ud~VQXZo
*/ BYA=M*f
public class HeapSort implements SortUtil.Sort{ ;R- z3C
A~~|X
/* (non-Javadoc) brhJ&|QDE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HWao3Lz
*/ 5kL#V
public void sort(int[] data) { S)AE
MaxHeap h=new MaxHeap(); \)6?u_(u
h.init(data); -%QEzu&
for(int i=0;i h.remove(); Wf&G9Be?8
System.arraycopy(h.queue,1,data,0,data.length); fb S.
} Q:xI} ]FM
N[?4yV2s
private static class MaxHeap{ B )3SiU
?;r7j V/`j
void init(int[] data){ 4VL!U?dk
this.queue=new int[data.length+1]; Se]t;7j
for(int i=0;i queue[++size]=data; a!6OE"?QQ
fixUp(size); iz|9a|k6x
} *dn-,Q%`
} 8aM% 9OU
HpgN$$\@
private int size=0; !C)>
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private int[] queue; -:1Gr8
w]}cB+C+l#
public int get() { JeSkNs|vB
return queue[1]; 5;KT-(q~
} ;lPhSkD
"r `6c0Z
public void remove() { GmWQJYX\
SortUtil.swap(queue,1,size--); 'kONb
fixDown(1); u+i/CE#w
} #| e5
file://fixdown K|' ]Hje\
private void fixDown(int k) { qm&53
int j; $EHn;~w T
while ((j = k << 1) <= size) { Ns7l-mb
if (j < size %26amp;%26amp; queue[j] j++; J,2v~Dq
if (queue[k]>queue[j]) file://不用交换 ',-X#u
break; (fjXp75
SortUtil.swap(queue,j,k); sC*E;7gT,
k = j; [}g5Z=l
} .dq.F#2B;
} 5<'Jd3N{&
private void fixUp(int k) { MyR\_)P?
while (k > 1) { 7Bb@9M?i
int j = k >> 1; 7}HA_@[
if (queue[j]>queue[k]) ,2L,>?r6
break; tYxlM!
SortUtil.swap(queue,j,k); qb/!;U_
k = j; Y&:\s8C
} }jy7,+
} Iw-6Z+ 94
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} hD~/6bx
hCx#Heh
} ViC76aJ
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SortUtil： UgBY ){<
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package org.rut.util.algorithm; 'k) P(H
6Yi,%#
import org.rut.util.algorithm.support.BubbleSort; ZkG##Jp\>
import org.rut.util.algorithm.support.HeapSort; 4w
import org.rut.util.algorithm.support.ImprovedMergeSort; SodW5v a
import org.rut.util.algorithm.support.ImprovedQuickSort; ToCfLJ?{
import org.rut.util.algorithm.support.InsertSort; YH6K-}
import org.rut.util.algorithm.support.MergeSort; m3ZOq B-
import org.rut.util.algorithm.support.QuickSort; 91'^--N
import org.rut.util.algorithm.support.SelectionSort; zCN;LpbEJY
import org.rut.util.algorithm.support.ShellSort; NomK(%8m$
,wy:RVv@e
/** 2Uw}'J_N
* @author treeroot { l~T~3/i
* @since 2006-2-2 bJu,R-f
* @version 1.0 TuPxyB
*/ u(Q(UuI
public class SortUtil { ).6/ii9gt
public final static int INSERT = 1; p5 PON0dS
public final static int BUBBLE = 2; Z-=7QK.\{
public final static int SELECTION = 3; &]A1 _dy
public final static int SHELL = 4; %x)U8
public final static int QUICK = 5; mTu9'/$(
public final static int IMPROVED_QUICK = 6; kxiyF$ 9
public final static int MERGE = 7; (W6\%H2u
public final static int IMPROVED_MERGE = 8; H0:6zSsc=|
public final static int HEAP = 9; Kd21:|!t^
O?<_,-.
public static void sort(int[] data) { 6#-; ,2i
sort(data, IMPROVED_QUICK); S`PSFetC
} Nr7.BDA
private static String[] name={ l`G:@}P>G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" = ft$j
}; w4/)r-Z4I
R3=E?us!
private static Sort[] impl=new Sort[]{ Pg}G4L?H;J
new InsertSort(), E<_6OCz
new BubbleSort(), MZ[g|o!)v
new SelectionSort(), w'j]Y%
new ShellSort(), [?(W7
new QuickSort(), O-m}P
new ImprovedQuickSort(), =njj.<BO
new MergeSort(), x}24?mP
new ImprovedMergeSort(), um4zLsd#v
new HeapSort() (3S/"ZE
}; VZl0)YLK
/ S^m!{
public static String toString(int algorithm){ J*k=|+[
return name[algorithm-1]; >I;#BE3
} bpCe&*\6K
Z@Z`8M@Q,
public static void sort(int[] data, int algorithm) { ,S K6*tpI
impl[algorithm-1].sort(data); BNUf0;
} aPMM:RP`
%}MM+1eu
public static interface Sort { h(K4AiGE
public void sort(int[] data); %5w)}|fw
} yL,B\YCf8
1Vvx@1
public static void swap(int[] data, int i, int j) { Q|r1.
int temp = data; TuR?r`P%
data = data[j]; FC.-u"V
data[j] = temp; SQvB)NOw
} TW? MS em
} )W3l{T(