[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; 2d*bF.
} g8cBb5(L
int i1=l; MWme3u)D
int i2=mid+1; dnomnY(*<
for(int cur=l;cur<=r;cur++){ *%/O (ohs@
if(i1==mid+1) zG$5g^J
data[cur]=temp[i2++]; t Cb34Wpf
else if(i2>r) n UmyPQ~
data[cur]=temp[i1++]; <O7!(
else if(temp[i1] data[cur]=temp[i1++]; c2NB@T9'v
else =/K)hI!u
data[cur]=temp[i2++]; WzstO}?P(
} inh:b .,B
} TC-Vzk G|
0GxJja
} ;N#}3lpLqg
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改进后的归并排序: T; tY7;<
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package org.rut.util.algorithm.support; `Pc6 G*p
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import org.rut.util.algorithm.SortUtil; >3p~>;9sc
E"9(CjbQ[
/** {U2AAQSa
* @author treeroot HL&HY)W1gf
* @since 2006-2-2 T/E=?kBR
* @version 1.0 T#Q7L~?zY
*/ <oJ?J^
public class ImprovedMergeSort implements SortUtil.Sort { t$du|q(
#w.0Cc
private static final int THRESHOLD = 10; hu$eO'M_
>%;i@"
/* Xk.OyQ@
* (non-Javadoc) K ,NmDc^
* =s!0EwDH3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6HZtdRQF
*/ FBwG3x
public void sort(int[] data) { q;bw}4
int[] temp=new int[data.length]; Ea S[W?u}
mergeSort(data,temp,0,data.length-1); 2!0tD+B
} ^+Nd\tp
_%R^8FjH*
private void mergeSort(int[] data, int[] temp, int l, int r) { +r'&6Me!
int i, j, k; kf>3T@
int mid = (l + r) / 2; 8OZasf
if (l == r) =q0V%h{
return; ( 0/M?YQF
if ((mid - l) >= THRESHOLD) i=\)[;U
mergeSort(data, temp, l, mid); QTBc_Z
else ^85Eveu
insertSort(data, l, mid - l + 1); Soq#cl'll-
if ((r - mid) > THRESHOLD) <qfAW?tF
mergeSort(data, temp, mid + 1, r); %W9R08`
else ~<!j]@.
insertSort(data, mid + 1, r - mid); HSysME1X:/
tkZUjQIX
for (i = l; i <= mid; i++) { s8&q8r7%
temp = data; ~2\Sn-`
} 8<"g&+T
for (j = 1; j <= r - mid; j++) { ZeuL*c \
temp[r - j + 1] = data[j + mid]; AE>W$x8P
} Bk\Y v0
int a = temp[l]; Wz.iDRFl
int b = temp[r]; w\s`8S
for (i = l, j = r, k = l; k <= r; k++) { :se$<d%
if (a < b) { xgMh@@e
data[k] = temp[i++]; =s":Mx,o
a = temp; `$Rgn3
} else { HghdTs
data[k] = temp[j--]; jz_Y|"{`v
b = temp[j]; X PyDZk/m
} Qu[QcB{ro-
} m[xl)/e
} jbipNgxkr
vN^.MR+<
/** V3ht:>c9qs
* @param data 1v|-+p42
* @param l VA[EY`8
* @param i Hc'Pp{| X
*/ :.ZWYze
private void insertSort(int[] data, int start, int len) { h"+7cc@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *Z"`g %,;
} &PE%tm
} H2BRId
} -y|J_;EG
} )XN%pn
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堆排序： U.,S.WP+d
WF`%7A39Af
package org.rut.util.algorithm.support; E>s+"y
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import org.rut.util.algorithm.SortUtil; >fWGiFmlk
3!l>\#q6
/** Qwpni^D8j
* @author treeroot uQ-GJI^t
* @since 2006-2-2 =( |%%,3
* @version 1.0 }qso} WI
*/ PolJo?HZ
public class HeapSort implements SortUtil.Sort{ {EvT7W
Cg]|x+
/* (non-Javadoc) KV$&qM.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6=]Gom&S
*/ TiI/I`A
public void sort(int[] data) { l SdA7
MaxHeap h=new MaxHeap(); 8^}/T#l
h.init(data); E#+2)Q
for(int i=0;i h.remove(); RJ@79L*#
System.arraycopy(h.queue,1,data,0,data.length); Xd%qebK
} X3G593ts
j%s,%#al
private static class MaxHeap{ @$r[$D v
**%&|9He
void init(int[] data){ $x'jf?zs!
this.queue=new int[data.length+1]; ?Vd~
for(int i=0;i queue[++size]=data; ;Va(l$zD
fixUp(size); Q&:)D7m\)S
} rQ{|0+l
} zA9q`ePS
C zJ-tEO
private int size=0; w\GJ,e
4,LS08&gh
private int[] queue; FTCIfW
:Q DkaA
public int get() { 3XlQ4
return queue[1]; fE~KWLm
} se %#U40*
+ )Qu,%2
public void remove() { e-y$&[
SortUtil.swap(queue,1,size--); ?YR;o4
fixDown(1); d.+
} vU,7Y|t`
file://fixdown V\zcv@
private void fixDown(int k) { (.P}>$M9
int j; `15}jTi
while ((j = k << 1) <= size) { +8zACs{p
if (j < size %26amp;%26amp; queue[j] j++; U\lbh;9G
if (queue[k]>queue[j]) file://不用交换 E2r5Pg
break; ,WWd%DF)
SortUtil.swap(queue,j,k); .)[E`a
k = j; 1rZ E2
} KsOSPQDGE
} )!27=R/
private void fixUp(int k) { 2*V%S/cck
while (k > 1) { dPu27 "
int j = k >> 1; 5%\K
if (queue[j]>queue[k]) K>+ v" x
break; uuEvH<1
SortUtil.swap(queue,j,k); *d C|X
k = j; 5 NYS@76o7
} 5Jo'h]
} m+'1c}n^7
-lJ|x>PG'
} &mN]U<N
;>Z+b#C[
} y_Lnk=Q ^
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SortUtil： L;opQ~g
ra*|HcLD
package org.rut.util.algorithm; 6<W^T9}v@/
h>!h|Ma
import org.rut.util.algorithm.support.BubbleSort; :epBd3f
import org.rut.util.algorithm.support.HeapSort; A x8>
import org.rut.util.algorithm.support.ImprovedMergeSort; NxnRQS
import org.rut.util.algorithm.support.ImprovedQuickSort; tZ[9qms^_
import org.rut.util.algorithm.support.InsertSort; d[l8qaD
import org.rut.util.algorithm.support.MergeSort; B bmw[Qf\
import org.rut.util.algorithm.support.QuickSort; @@\qso
import org.rut.util.algorithm.support.SelectionSort; DL V ny]
import org.rut.util.algorithm.support.ShellSort; ppIXS(
'Grej8
/** .)tQ&2
* @author treeroot xMk>r1Ud
* @since 2006-2-2 c\ZI 5&4jT
* @version 1.0 X[?fU&
*/ }Y7P2W+4?
public class SortUtil { _qPKdGoM
public final static int INSERT = 1; `/T.u&QF
public final static int BUBBLE = 2; 1;~sNSTo
public final static int SELECTION = 3; W^3 Jg2gE
public final static int SHELL = 4; \"ogQnmz
public final static int QUICK = 5; 0"e["q{|
public final static int IMPROVED_QUICK = 6; p+iNi4y@
public final static int MERGE = 7; 9`92 >
public final static int IMPROVED_MERGE = 8; b)IQa,enH
public final static int HEAP = 9; 8g8eY pG
Ec<33i]h*p
public static void sort(int[] data) { jX4$PfOhR
sort(data, IMPROVED_QUICK); ^!^M Gzu
} -sv%A7i
private static String[] name={ r jn:E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n#"G)+h3#
}; oX^N>w0F
&<*M{GW'&
private static Sort[] impl=new Sort[]{ .^A4w;jPU
new InsertSort(), D,..gsg
new BubbleSort(), ^/?7hbr
new SelectionSort(), |s/Kb]t
new ShellSort(), r(wf>w3
new QuickSort(), JG^GEJ
new ImprovedQuickSort(), 5GAW3j{
new MergeSort(), P'B|s/)
new ImprovedMergeSort(), U~BR8]=G
new HeapSort() wq.'8Y~BE
}; 0B1nk!F
=,it`8;
public static String toString(int algorithm){ |(tl a_LE
return name[algorithm-1]; "\Dqtr w
} Y!]a*==
}8 ;,2E*z
public static void sort(int[] data, int algorithm) { F\&wFA'J
impl[algorithm-1].sort(data); N>EMVUVS
} ,k.")
j{FRD8]V
public static interface Sort { 7)D[}UXz
public void sort(int[] data); b'^<0c
} sQ\HIU%]
7p'pz8n`X
public static void swap(int[] data, int i, int j) { 5+{oQs_
int temp = data; 5xKod0bA
data = data[j]; pFMJG<W9,
data[j] = temp; ?r|iZKa
} & +`g~6U
} < `;Mf>V