[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; j.M]F/j
} V&zeC/xSq
int i1=l; l)r\SE1
int i2=mid+1; y-pdAkDh
for(int cur=l;cur<=r;cur++){ :zW? O#aL-
if(i1==mid+1) 01(U)F\
data[cur]=temp[i2++]; G|cjI*
else if(i2>r) uQ=u@qtp
data[cur]=temp[i1++]; RDps{),E;d
else if(temp[i1] data[cur]=temp[i1++]; k>i88^kPV
else Fe8X@63
data[cur]=temp[i2++]; 3M#x)cW
} bTs2$81[
} HT7,B(.}
1wgL^Qz@
} ydWr&E5
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改进后的归并排序: GMU!GSY
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package org.rut.util.algorithm.support; l;M,=ctB(
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import org.rut.util.algorithm.SortUtil; tP_.-//
r] /Ej!|
/** C eEhe
* @author treeroot 7mtx^
* @since 2006-2-2 *r.%/^@
* @version 1.0 >s<Bu'r
*/ N8]DzE0%
public class ImprovedMergeSort implements SortUtil.Sort { 9KK^1<46c
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private static final int THRESHOLD = 10; D#nHg
@(R=4LL
/* g0f4>m
* (non-Javadoc) VEV?$R7;
* 6AIqoX*p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y[J9"k(@
*/ lhM5a \
public void sort(int[] data) { r'noB<|e
int[] temp=new int[data.length]; 2)BO@]n
mergeSort(data,temp,0,data.length-1); UVDMYA0
} O0}uY:B
GwO`@-}E
private void mergeSort(int[] data, int[] temp, int l, int r) { .1(_7!m@
int i, j, k; kTjn%Sn,
int mid = (l + r) / 2; bAlty}U
if (l == r) HOi~eX1d
return; k;qS1[a
if ((mid - l) >= THRESHOLD) CG uuadNI
mergeSort(data, temp, l, mid); #x 6/"Y2
else Up Z 9g"
insertSort(data, l, mid - l + 1); hUpour |b
if ((r - mid) > THRESHOLD) (~Z&U
mergeSort(data, temp, mid + 1, r); a3n Wt
else E"}%$=yK
insertSort(data, mid + 1, r - mid); \LUW?@gLa
Q7amp:JFb
for (i = l; i <= mid; i++) { i59}6u_f
temp = data; -|x7<$Hw
} -.Wwo(4
for (j = 1; j <= r - mid; j++) { drpx"d[c
temp[r - j + 1] = data[j + mid]; G!%m~+",
} n)N!6u
int a = temp[l]; x~k3kj
int b = temp[r]; #ChTel
for (i = l, j = r, k = l; k <= r; k++) { 2fdN@iruB
if (a < b) { 9q]f]S.L
data[k] = temp[i++]; `*[Kmb\
a = temp; PY|zN|
} else { ZQ"dAR/y
data[k] = temp[j--]; I484cR2.
b = temp[j]; 5VE=Oo#&
} +:Xg7H*
} FM%WMyb[
} UhR^Y{W5
wsdZwik
/** sudh=_+>
* @param data &$ }6:
* @param l MoxWnJy}
* @param i dkC_Sh{
*/ #0)TS
private void insertSort(int[] data, int start, int len) { [`|t(E'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /#5rt&q
} I!b"Rv=Nf-
} ju:}%'
} kM-8%a2i
} vEjf|-Mb9
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堆排序： |`yU \
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package org.rut.util.algorithm.support; b73}|4v
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import org.rut.util.algorithm.SortUtil; &pY$\
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/** c}v8j2{
* @author treeroot Sj)?!
* @since 2006-2-2 _G`Q2hf"5
* @version 1.0 wg_Z@iX
*/ *56j'FX
public class HeapSort implements SortUtil.Sort{ J_a2DM6d
51%Rk,/o
/* (non-Javadoc) *s, bz.[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jj%xLv%
*/ F.(W`H*1+
public void sort(int[] data) { QlVj#Jv;~
MaxHeap h=new MaxHeap(); 3Ch42<
h.init(data); rhYARr'
for(int i=0;i h.remove(); },<Y \
System.arraycopy(h.queue,1,data,0,data.length); ZC$u8$+P
} n[BYBg1yG
{Mo[C%
private static class MaxHeap{ uD{^1c3x
QP"5A7=m
void init(int[] data){ D,$M$f1
this.queue=new int[data.length+1]; )a!f")@uz
for(int i=0;i queue[++size]=data; EId>%0s5
fixUp(size); Yq/vym-O5
} Gqq<-drR
} %/)z!}{
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private int size=0; 'xEomo#
(7_ezWSl>
private int[] queue; dM,{:eID
ao7M([ff
public int get() { vh|m[p
return queue[1]; I 8 ?
} j!L7r'AV5
/=V!lRs
public void remove() { w3iX "w
SortUtil.swap(queue,1,size--); j0F& WKk
fixDown(1); 0LGHSDb
} X+;#^A3
file://fixdown ld%#.~Q
private void fixDown(int k) { :\mdVS!o
int j; <}mA>c'k
while ((j = k << 1) <= size) { U_9|ED:
if (j < size %26amp;%26amp; queue[j] j++; W`[7|8(6!
if (queue[k]>queue[j]) file://不用交换 $Q|6W &?[;
break; TJcHqzcUc
SortUtil.swap(queue,j,k); SA"4|#3>7
k = j; ,LOx!
} "T8b.ng
} daB5E<?
private void fixUp(int k) { eMOp}.zt|
while (k > 1) { ?t;,Nk`jx
int j = k >> 1; i*xVD`x~
if (queue[j]>queue[k]) C9Cl$yZ
break; x wfdJ(&
SortUtil.swap(queue,j,k); >0:=<RW
k = j; |+-b#Sa9
} Nog{w
} JBV 06T_4o
3"HEXJMc
} # b3 14
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} FIJ]`
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SortUtil： }PMlG
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package org.rut.util.algorithm; R{B5{~m>W@
U~|)=+%O
import org.rut.util.algorithm.support.BubbleSort; :p1_ij]ND
import org.rut.util.algorithm.support.HeapSort; 3;//o<
import org.rut.util.algorithm.support.ImprovedMergeSort; P=ubCS'
import org.rut.util.algorithm.support.ImprovedQuickSort; j;_E0j#
import org.rut.util.algorithm.support.InsertSort; 1"l48NLL|
import org.rut.util.algorithm.support.MergeSort; 3!KyO)8
import org.rut.util.algorithm.support.QuickSort; *TL3-S?
import org.rut.util.algorithm.support.SelectionSort; So NgDFD
import org.rut.util.algorithm.support.ShellSort; wG 5H^>6u>
|>JRJ"CFE
/** E0A[{UA
* @author treeroot -t*P=V|@
* @since 2006-2-2 O/l/$pe
* @version 1.0 YRaF@?^Gn
*/ 2 I.Q-'@
public class SortUtil { Q9g^'a
public final static int INSERT = 1; khP Ub,
public final static int BUBBLE = 2; Qoz4(~I
public final static int SELECTION = 3; uY&t9L8
public final static int SHELL = 4; 'Urx83
public final static int QUICK = 5; e9F+R@8
public final static int IMPROVED_QUICK = 6; ypvz&SzIh
public final static int MERGE = 7; /p|L.&`U
public final static int IMPROVED_MERGE = 8; BI>r'
public final static int HEAP = 9; o~x49%X<c
>b*}Td~J
public static void sort(int[] data) { :dlG:=.W
sort(data, IMPROVED_QUICK); BE!WCDg,
} =1VpO{q
private static String[] name={ TaG(sRI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $3Sm?
}; C9%A?'`
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private static Sort[] impl=new Sort[]{ 5N#Sic M
new InsertSort(), (]"`>,ray
new BubbleSort(), >)F)@KAuN4
new SelectionSort(), [WR*u\FF
new ShellSort(), S2V+%Z _J
new QuickSort(), *Fd(
new ImprovedQuickSort(), ZjgfkZAS
new MergeSort(), r#mH[|@W~
new ImprovedMergeSort(), K &G
new HeapSort() #!jwn^yq
}; a/~1CrYr
2Gc0pBqx
public static String toString(int algorithm){ RbEtNwG@c
return name[algorithm-1]; 7] >z e
} P.Qz>c^-C
)9{!=k
public static void sort(int[] data, int algorithm) { D' h%.
impl[algorithm-1].sort(data); y#J8Yv8
} ?[8s`caK.
?2S<D5MSb
public static interface Sort { Cyp%E5b7
public void sort(int[] data); o|1_I?_
} nsXyReWka
JIMi~mEiN
public static void swap(int[] data, int i, int j) { U;]h/3P
int temp = data; 2()/l9.O'
data = data[j]; Y-v6M3$
data[j] = temp; ^B'N\[
} dJ7!je1N*
} ^Zq3K