[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; izGU&VeB
} }$L1A
int i1=l; Q_!tn*
int i2=mid+1; 2#3`[+g<n
for(int cur=l;cur<=r;cur++){ <H-kR\HF
if(i1==mid+1) MMC$c=4"
data[cur]=temp[i2++]; QA;,/iw`
else if(i2>r) S5, u| H
data[cur]=temp[i1++]; ebNRZJ?C,
else if(temp[i1] data[cur]=temp[i1++]; m[Ihte->
else 0*tnJB
data[cur]=temp[i2++]; MN5}}@
} k\;D;e{
} wbcip8<t
n'{jc6&|
} x=L"qC9f/
'[%Pdd]! E
改进后的归并排序: F?]J`F\I
XOQ0(e6
package org.rut.util.algorithm.support; p{W Amly
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import org.rut.util.algorithm.SortUtil; =T26vu
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/** <ta{)}IN^
* @author treeroot QRKP;aYt
* @since 2006-2-2 <T)0I1S
* @version 1.0 .|g@#XIwe#
*/ R@NFpiw
public class ImprovedMergeSort implements SortUtil.Sort { C9MK3vtD.
&Ejhw3Nw
private static final int THRESHOLD = 10; 7kA+F+f
^>!&]@
/* J%xUO1
* (non-Javadoc) WbhYGcRy
* zA+0jhuG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4gev^/^^
*/ pM+9K:^B
public void sort(int[] data) { yih|6sd$F
int[] temp=new int[data.length]; /F"eqMN
mergeSort(data,temp,0,data.length-1); :=+YZ|&j
} e&:%Rr]x
`uk=2k}&m
private void mergeSort(int[] data, int[] temp, int l, int r) { lg2I|Z6DH
int i, j, k; 2ib,33 Z
int mid = (l + r) / 2; A&B|n!;b
if (l == r) "fhQ{b$i
return; AY<L8
if ((mid - l) >= THRESHOLD) IgwHC0W
mergeSort(data, temp, l, mid); edcz%IOM(
else ?f3R+4
insertSort(data, l, mid - l + 1); B=%%3V)2
if ((r - mid) > THRESHOLD) C{nk,j L
mergeSort(data, temp, mid + 1, r); Akc |E!V
else oHv.EO
insertSort(data, mid + 1, r - mid); :eD-'#@$u
/4+Q; P
for (i = l; i <= mid; i++) { f_LXp$n
temp = data; n/*" 2
} qa@;S,lp
for (j = 1; j <= r - mid; j++) { SDSP4W5
temp[r - j + 1] = data[j + mid]; tq~f9EvC
} GhcH"D%-
int a = temp[l]; PZ'|)
int b = temp[r]; TJW8l[M
for (i = l, j = r, k = l; k <= r; k++) { M;3q.0MU
if (a < b) { _yH">x<
data[k] = temp[i++]; 3kUb cm
a = temp; 'WmjQsf
} else { NKB["+S<
data[k] = temp[j--]; !ii(2U
b = temp[j]; \}kR'l
} gpzFY"MS=
} .mqMzV
} NX(+%EBcA
%x@bP6d[
/** Eul3 {+]
* @param data s 72yu}
* @param l &FOq c
* @param i /y4A?*w6
*/ "SQyy
private void insertSort(int[] data, int start, int len) { NJd4( P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3*j1v:x`
} CH!\uK22
} nm%qm
} m1]/8{EC7
} o%z^@Cq
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堆排序： -6s]7#IC
qRcg|']R
package org.rut.util.algorithm.support; =MM+(mD
~Eik&5 z
import org.rut.util.algorithm.SortUtil; 5eFtcK
sh`3${
/** |Thm5,ao
* @author treeroot . uGne
* @since 2006-2-2 ,\3Cq2h
* @version 1.0 Z[Iej:o5
*/ HfP<hQmN'
public class HeapSort implements SortUtil.Sort{ [)8O\/:
5?Q5cD2]\6
/* (non-Javadoc) UA6 C/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9fTl6?x
*/ be_h uZ
public void sort(int[] data) { e?07o!7[;
MaxHeap h=new MaxHeap(); =^*EM<WG)
h.init(data); b">"NvlB
for(int i=0;i h.remove(); -AVT+RE9z
System.arraycopy(h.queue,1,data,0,data.length); )>Z@')Uk:
} Mg8ciV}\xY
~p{YuW[e
private static class MaxHeap{ ]{{%d4
.}+3A~
void init(int[] data){ n[y^S3}%;
this.queue=new int[data.length+1]; S{]3e-?
for(int i=0;i queue[++size]=data; =x(k)RTDu
fixUp(size); ^c.pvC"4j
} rP"Y.;s
} y/_=
}7{(o-
private int size=0; ##F$8d)q
mAIl)mq|g
private int[] queue; 2Z<S^9O9
6MU;9|&
public int get() { i88`W&tI{
return queue[1]; A>S7Ap4z>
} 7oUo[
Rw[!Jq
public void remove() { 8(q8}s$>
SortUtil.swap(queue,1,size--); 48J{Y3F
fixDown(1); Zg4wd/y?
} 4z~;4
file://fixdown "la0@/n
private void fixDown(int k) { :*|So5fs
int j; &pz`gna
while ((j = k << 1) <= size) { myOW^
if (j < size %26amp;%26amp; queue[j] j++; ^Dfqc-]
if (queue[k]>queue[j]) file://不用交换 K~^o06 Y
break; egfd=z=2un
SortUtil.swap(queue,j,k); 4PU@W o
k = j; D0S^Msk9L
} ~WV1t][
} ,1<6=vL
private void fixUp(int k) { OzRo
while (k > 1) { w+!V,lU"^
int j = k >> 1; :l Z\=2D
if (queue[j]>queue[k]) 8/,s8u
break; } MP_
SortUtil.swap(queue,j,k); U%VFr#
k = j; hmb=_W
} ?,hGKSC
} z [u!C/
N5cC!K
} z?`7g%Z?{
-(%Xq{
} >oEFuwE
l#>A.-R*`
SortUtil： Sw[*1C8
+Bt%W%_X
package org.rut.util.algorithm; Sv>CVp*
PIQd=%?'
import org.rut.util.algorithm.support.BubbleSort; ~e){2_J&n
import org.rut.util.algorithm.support.HeapSort; yC|odX#
import org.rut.util.algorithm.support.ImprovedMergeSort; w`#9Re
import org.rut.util.algorithm.support.ImprovedQuickSort; UA0( cK
import org.rut.util.algorithm.support.InsertSort; 7s:cg
import org.rut.util.algorithm.support.MergeSort; 2AxKB+c1`
import org.rut.util.algorithm.support.QuickSort; a~-k} G5
import org.rut.util.algorithm.support.SelectionSort; %^"i\-*|S
import org.rut.util.algorithm.support.ShellSort; ?&U~X)Q
@fVz *
/** K3rsew n
* @author treeroot 6BXZGE
* @since 2006-2-2 pm=s
* @version 1.0 UK@hnQU8`
*/ EW]8k@&g
public class SortUtil { 6Ol)SQE,
public final static int INSERT = 1; !@+4&B=
public final static int BUBBLE = 2; ~_-+Q=3
public final static int SELECTION = 3; {K/xI
public final static int SHELL = 4; ;'<SsI
public final static int QUICK = 5; t`V U<
public final static int IMPROVED_QUICK = 6; EzCi%>q
public final static int MERGE = 7; sN1I+X
public final static int IMPROVED_MERGE = 8; 6-{wo)p
public final static int HEAP = 9; {;JFoe+
*tDxwD7
public static void sort(int[] data) { 8D^ iQBA
sort(data, IMPROVED_QUICK); |hu9)0P
} F22]4DLHO
private static String[] name={ H}1XK|K3#H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {qH+S/
}; k)9 pkPl
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private static Sort[] impl=new Sort[]{ o1&Oug
new InsertSort(), c&SSf_0O*
new BubbleSort(), %IUTi6P l
new SelectionSort(), 6WLq>Jo
new ShellSort(), 7Uh/Gl
new QuickSort(), 86Xf6Ea
new ImprovedQuickSort(), T(+*y
new MergeSort(), f2Tz5slE
new ImprovedMergeSort(), I[LHJ4
new HeapSort() TP=#U^g*
}; Hegj_FQ
!T]bz+
public static String toString(int algorithm){ ~llw_w
return name[algorithm-1]; ;|Rrtf9
} )OQih+#?W
$*+UX
public static void sort(int[] data, int algorithm) { 6bbzgULl
impl[algorithm-1].sort(data); emS7q|^
} >~G _'~_f
%i.;~>
public static interface Sort { \e?w8R.6w^
public void sort(int[] data); G`u";w_
} QWwEfL
m&6)Vt
public static void swap(int[] data, int i, int j) { P;p20+
int temp = data; U {sT %G
data = data[j]; r5!Sps3B
data[j] = temp; w"E.Va
} ?)/&tk9.n
} \ 3l3,VYH