[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; aaD;jxT&M|
} Reatdh
int i1=l; S[WG$
int i2=mid+1; Sb~MQ_
for(int cur=l;cur<=r;cur++){ #>Zzf
if(i1==mid+1) ;2B{9{
data[cur]=temp[i2++]; @E:,lA
else if(i2>r) ?-^~f
data[cur]=temp[i1++]; /cU<hApK
else if(temp[i1] data[cur]=temp[i1++]; Um&(&?Xf
else J9~g|5
data[cur]=temp[i2++]; HRB<Y mP@
} " Hd|7F'u=
} s%<eD
[l,Ei?
} \7CGUB>L
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改进后的归并排序: c y8;@[#9
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package org.rut.util.algorithm.support; _a1x\,R|DB
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import org.rut.util.algorithm.SortUtil; O{#=d
F_CYYGZ
/** +SwR+H)?
* @author treeroot JQ"U4GVp
* @since 2006-2-2 ~6p[El#tS
* @version 1.0 JH7<
*/ &RfC"lc
public class ImprovedMergeSort implements SortUtil.Sort { ocs+d\
ynbuN x*
private static final int THRESHOLD = 10; AM!G1^c
=Q\r?(Iy
/* <>Hj ;q5p
* (non-Javadoc) EAM5{Nc
* z*-2.}&U<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b9!FC$^J
*/ WYr/oRO
public void sort(int[] data) { BqT y~{)+
int[] temp=new int[data.length]; *c2YRbU(
mergeSort(data,temp,0,data.length-1); <~WsD)=$
} H- $)3"K
b9l;a+]d
private void mergeSort(int[] data, int[] temp, int l, int r) { OLE[UXD-E
int i, j, k; k?,1x~
int mid = (l + r) / 2; ^0 -:G6H
if (l == r) :5{wf Am
return; vd[0X;
if ((mid - l) >= THRESHOLD) 9gmW&{6q
mergeSort(data, temp, l, mid); !_Wi!Vr_
else }"|K(hq
insertSort(data, l, mid - l + 1); ,'u W*kx
if ((r - mid) > THRESHOLD) h D/*h*}T>
mergeSort(data, temp, mid + 1, r); _WRFsDZ'
else a*&B`77`|
insertSort(data, mid + 1, r - mid); r8xv#r1
|AozR ~
for (i = l; i <= mid; i++) { J|qZ+A[z
temp = data; ax<?GjpM
} LA}Syt\F
for (j = 1; j <= r - mid; j++) { 9@Jtaq>jf
temp[r - j + 1] = data[j + mid]; ):[7E(F=
} o{y9r{~A
int a = temp[l]; :0Rx#%u}#
int b = temp[r]; E4M@WNPx
for (i = l, j = r, k = l; k <= r; k++) { vwxXgk
if (a < b) { GJ_7h_4
data[k] = temp[i++]; QD0"rxZJ
a = temp; ?M\{&mlF
} else { *=V~YF:Qb
data[k] = temp[j--]; # mV{#B=
b = temp[j]; *Qg_F6y
} >LOjV0K/
} f}9zgWU
} f,kZ\Ia'r
@}}$zv6l,
/** ;6>2"{NW
* @param data ]7Tkkw$
* @param l YTUZoW2
* @param i H}hiT/+$
*/ =4FXBPoQK
private void insertSort(int[] data, int start, int len) { ;wz^gdh;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Utnr5^].2O
} WE:24b6
} d?A 0MKnl
} 8Djc c z
} *%%g{ 3$
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堆排序： 0Ziw_S\d&s
7/I,HxXp!
package org.rut.util.algorithm.support; ;V*l.gr'2
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import org.rut.util.algorithm.SortUtil; i3@)W4{
~a ]+#D
/** w9< R#y[A
* @author treeroot &L'Dqew,*
* @since 2006-2-2 {xXsBh Y
* @version 1.0 >n'o*gZM
*/ 1H6<[iHW
public class HeapSort implements SortUtil.Sort{ "@iK' c^
:bwjJ}F
/* (non-Javadoc) y1dDO2mA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X-K=!pET
*/ wn/_}]T
public void sort(int[] data) { L~lxXTG\
MaxHeap h=new MaxHeap(); >\KNM@'KI
h.init(data); u{['<r;I
for(int i=0;i h.remove(); UQ?XqgUM
System.arraycopy(h.queue,1,data,0,data.length); Ya3C#=
} (k5We!4[1
0i!uUF
private static class MaxHeap{ $w2u3-
|}BLF
void init(int[] data){ \Q0[?k
this.queue=new int[data.length+1]; 2mVD_ s[`
for(int i=0;i queue[++size]=data; Enum/O5
fixUp(size); %4et&zRC
} ZX9TYN
} J;.wXS_U8
4|riKo)
private int size=0; E8$20Ue
.F
private int[] queue; "{@A5A
9K{%vK
public int get() { 47+&L
return queue[1]; ,(qRc(Ho
} 9g'LkP
?XrQ53
public void remove() { ;oW6 NJ
SortUtil.swap(queue,1,size--); mF*2#]%dx
fixDown(1); 0D\#Pq v
} $rv8K j+
file://fixdown !t$'AoVBq
private void fixDown(int k) { sFT.Oxg<
int j; \<JSkr[h!"
while ((j = k << 1) <= size) { >s>1[W@*
if (j < size %26amp;%26amp; queue[j] j++; 52:HNA\E/
if (queue[k]>queue[j]) file://不用交换 R!\_rc1/
break; v1o#1;
SortUtil.swap(queue,j,k); 3er nTD*`
k = j; $HHs^tW
} +b0eE)
} ]m g)Q:d,
private void fixUp(int k) { G&D7a/G\
while (k > 1) { +)!YrKuu
int j = k >> 1; YVQN&|-
if (queue[j]>queue[k]) PRu 6xsyA
break; .7e2YI,S
SortUtil.swap(queue,j,k); #hfXZVD
k = j; \KMToN&2
} !=;+%C&8y
} [I'0,y
nw-xSS{
} I4/8 _)b^
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} '&x#rjo#
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SortUtil： @e(o129
+giyX7BPJ
package org.rut.util.algorithm; 2|3)S`WZl
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import org.rut.util.algorithm.support.BubbleSort; (D#B_`;-
import org.rut.util.algorithm.support.HeapSort; %<k2#6K
import org.rut.util.algorithm.support.ImprovedMergeSort; H$=e -L`@
import org.rut.util.algorithm.support.ImprovedQuickSort; -G}[AkmS
import org.rut.util.algorithm.support.InsertSort; e@Fo^#ImDx
import org.rut.util.algorithm.support.MergeSort; lD)%s!
import org.rut.util.algorithm.support.QuickSort; #pP[xE"Y
import org.rut.util.algorithm.support.SelectionSort; R)_%i<nq\
import org.rut.util.algorithm.support.ShellSort; *w^C"^*
PmkR3<=leg
/** \Jx04[=
* @author treeroot KK&rb~
* @since 2006-2-2 Aw}"gpL
* @version 1.0 X iS1\*
*/ G,?hp>lj
public class SortUtil { QQ%D8$k"
public final static int INSERT = 1; "$#xK|t
public final static int BUBBLE = 2; ;YA(|h<
public final static int SELECTION = 3; |SoCRjuCPM
public final static int SHELL = 4; }YB*]<]
public final static int QUICK = 5; :o|\"3
public final static int IMPROVED_QUICK = 6; oe%}?u
public final static int MERGE = 7; $@z5kwx:P
public final static int IMPROVED_MERGE = 8; .z]Wyx&/U
public final static int HEAP = 9; +]*zlE\N`
VCY\be
public static void sort(int[] data) { 13=A
sort(data, IMPROVED_QUICK); [$qyF|/K`n
} v25R_""~
private static String[] name={ 7|{}\w(I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;nep5!s;<
}; "fG8?)d;
n!YKz"$
private static Sort[] impl=new Sort[]{ hBS.a6u1'd
new InsertSort(), f%SZg!+t
new BubbleSort(), [b6R%
new SelectionSort(), 1pt%Kw*@j
new ShellSort(), _wTOmz%|R
new QuickSort(), sPr~=,F
new ImprovedQuickSort(), m_.>C
new MergeSort(), oC<.=2]
new ImprovedMergeSort(), g<l1zo`_
new HeapSort() JSkLEa~<
}; K~c=M",mW
}p}[j t
public static String toString(int algorithm){ }=%oX}[
return name[algorithm-1]; Wr<j!>J6Ki
} G/b^|;41
#yI mKEYX
public static void sort(int[] data, int algorithm) { k9k XyX[
impl[algorithm-1].sort(data); p2ogn}`
} LCZ\4g05
&|Bc7+/P
public static interface Sort { _y),J'W^3u
public void sort(int[] data); tz5e"+Tz
} W=j[V Oq
Cbg!:Cws
public static void swap(int[] data, int i, int j) { :yRo3c
int temp = data; 5~r33L%
data = data[j]; 4i6q{BeHn
data[j] = temp; E0Y-7&Fv
} RTE8Uq36
} RP~|PtLw_