[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; }f;Zx)!
} UqsVqi h(
int i1=l; z X2BJ
int i2=mid+1; (`<l" @:_*
for(int cur=l;cur<=r;cur++){ N$6Rg1
if(i1==mid+1) 6}K|eUak/
data[cur]=temp[i2++]; &t5pJ`$(Cy
else if(i2>r) z"Gk K T
data[cur]=temp[i1++]; )DI/y1
else if(temp[i1] data[cur]=temp[i1++]; <6Y o%xt
else ppM d
data[cur]=temp[i2++]; 4 "@BbVYR
} ,xn+T)2I
} iRPt0?$
Q|"{<2"]U0
} #hH"g
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改进后的归并排序: U*(m'Ea
,}=x8Xxr
package org.rut.util.algorithm.support; @Vr?)_0
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import org.rut.util.algorithm.SortUtil; /IxMRi=
4["$}O5
/** di "rvw;R
* @author treeroot z%hB=V!~91
* @since 2006-2-2 :05>~bn>pC
* @version 1.0 k10dkBoEX
*/ pV=X
public class ImprovedMergeSort implements SortUtil.Sort { :eo2t>zF-<
71z$a
private static final int THRESHOLD = 10; zEl@jK,{$
"c\ZUx_i6
/* !BIq>pO%Ui
* (non-Javadoc) F7E#x
* so9h6K{qcp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W&;X+XA_W
*/ MV-fDqA(
public void sort(int[] data) { 5$`i)}:s
int[] temp=new int[data.length]; #6 e
mergeSort(data,temp,0,data.length-1); |4\.",Bg
} G;Q)A$-
I%h9V([
private void mergeSort(int[] data, int[] temp, int l, int r) { Zh)Qq?H
int i, j, k; `9(TqcE
int mid = (l + r) / 2; +w?RW^:Q=
if (l == r) 9F(<n
return; 2ZNTj u7h
if ((mid - l) >= THRESHOLD) <*i '
mergeSort(data, temp, l, mid); J-:\^uP
else ReE6h\j
insertSort(data, l, mid - l + 1); +`r;3kH ..
if ((r - mid) > THRESHOLD) /(bPc12
mergeSort(data, temp, mid + 1, r); pUZbZ U
else GO.mT/rB
insertSort(data, mid + 1, r - mid); O'Lgb9
&y[Od{=
for (i = l; i <= mid; i++) { j="{^b
temp = data; 1[ ME/r
} z:ue]7(.
for (j = 1; j <= r - mid; j++) { I:P/ ?-
temp[r - j + 1] = data[j + mid]; WtN o@e'
} ;dPyhR
int a = temp[l]; ;sE;l7
int b = temp[r]; )(oRJu)y
for (i = l, j = r, k = l; k <= r; k++) { u}W R1u[
if (a < b) { ^8,HJG,!
data[k] = temp[i++]; "~:o#~F6
a = temp; U!r2`2LY
} else { fil'._
data[k] = temp[j--]; w^s|YF=c
b = temp[j]; _n,Ye&m
} 6Z]* ce<r
} t|0Zpp;
} I dgha9K
[8EzyB>fH
/** P3jDx{F
* @param data 4yW9}=N!
* @param l h.gj4/g
* @param i `f,SY
*/ Ob$|IH8.
private void insertSort(int[] data, int start, int len) { ftw\oGrS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hF"yxucj$
} c|
} CPWe (
} ?B.>VnYZ/a
} =B@owx
v@_b"w_TY
堆排序： l`G .lM(
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package org.rut.util.algorithm.support; ujGvrYj
81u}J9z;
import org.rut.util.algorithm.SortUtil; p^_2]%,QeM
y, @I6
/** ?xu5/r<
* @author treeroot DF|(CQs9
* @since 2006-2-2 -.~Dhk
* @version 1.0 {s&6C-
*/ AC;ja$A#
public class HeapSort implements SortUtil.Sort{ tn&~~G~#
8x#SpDI
/* (non-Javadoc) 6,"86
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3e+ Ih2
*/ )F Q '^
public void sort(int[] data) { B~K@o.%
MaxHeap h=new MaxHeap(); 1|_jV7`Mz
h.init(data); jHBzZ!<
for(int i=0;i h.remove(); r8x<-u4
System.arraycopy(h.queue,1,data,0,data.length); x?v/|
} V+j58Wuf
lArYlR}
private static class MaxHeap{ 4n_f7'GZg
CBz$N)f
void init(int[] data){ $Tci_(V=F
this.queue=new int[data.length+1]; q^NI
for(int i=0;i queue[++size]=data; jI:5[. Y
fixUp(size); {+r0Nikx_
} i7]\}w|
} M|IR7OtLV
oRmz'F
private int size=0; Qz6Ry\u
RS'!>9I
private int[] queue; ,?s3%<\2
!@j5yYf
public int get() { >Wvb!8N
return queue[1]; }@JPvIE
} v53qpqc
GR6BpV7
public void remove() { /sHWJ?`&/,
SortUtil.swap(queue,1,size--); zE$KU$
fixDown(1); it?l! ~
} B"sQ\gb%Q
file://fixdown <Sw>5M!j
private void fixDown(int k) { &,~0*&r0
int j; -UD^O*U
while ((j = k << 1) <= size) { q=Cc2|Ve
if (j < size %26amp;%26amp; queue[j] j++; , H$1iJ?
if (queue[k]>queue[j]) file://不用交换 N0`v;4gF$]
break; ]!l]^/.
SortUtil.swap(queue,j,k); [wKnJu
k = j; s'/b&Idf8
} zg)-RCG
} Qy!*U%tG'
private void fixUp(int k) { Buazm3q8H
while (k > 1) { 9em?2'ysa
int j = k >> 1; Ci{,e%
if (queue[j]>queue[k]) MA9Oi(L)K
break; 19V
SortUtil.swap(queue,j,k); jN.'%5Q?H
k = j; +v$,/~$tI
} !yxb=>A
} =Yd{PZ*fR
;fg8,(SM^
} 7Q_AZR4
~CTe5PX c
} 3 *0/<1f1!
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SortUtil： QPL6cU$&R
Z+# =]Kw)
package org.rut.util.algorithm; ?f}lYQzM
{[Bo"a>%
import org.rut.util.algorithm.support.BubbleSort; }V@ * :3w8
import org.rut.util.algorithm.support.HeapSort; #ZFedK0vv
import org.rut.util.algorithm.support.ImprovedMergeSort; ~96fyk|
import org.rut.util.algorithm.support.ImprovedQuickSort; /E(319u_
import org.rut.util.algorithm.support.InsertSort; T~=r*4
import org.rut.util.algorithm.support.MergeSort; f8Z[prfP
import org.rut.util.algorithm.support.QuickSort; wOfx7D
import org.rut.util.algorithm.support.SelectionSort; w4 R!aWLd
import org.rut.util.algorithm.support.ShellSort; m6'VMW
):LgZ4h
/** "t[9EbFL
* @author treeroot 2.xA' \M
* @since 2006-2-2 /&PRw<}>_o
* @version 1.0 EL--?<g
*/ ]f%yeD
public class SortUtil { ape\zZCV
public final static int INSERT = 1; qM~;Q6{v
public final static int BUBBLE = 2; +>v3&[lGv
public final static int SELECTION = 3; !|\$|m<n
public final static int SHELL = 4; zk#NM"C+
public final static int QUICK = 5; ~ 9F rlj
public final static int IMPROVED_QUICK = 6; |$hBYw
public final static int MERGE = 7; w+,Kpb<x[0
public final static int IMPROVED_MERGE = 8; ,RP"m#l!\
public final static int HEAP = 9; G&eRhif
'>8IOC
public static void sort(int[] data) { _zuaImJ0o
sort(data, IMPROVED_QUICK); `a$c6^a
} . 5cL+G1k#
private static String[] name={ )sONfn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {>x6SVF
}; 2 %`~DVo
Bf)}g4nYn
private static Sort[] impl=new Sort[]{ :TPT]q d@
new InsertSort(), ?%QWpKO7X
new BubbleSort(), \B72 #NR
new SelectionSort(), iZ^tLnc
new ShellSort(), ?2RDd|#
new QuickSort(), =hw&2c
new ImprovedQuickSort(), E}YJGFB7"
new MergeSort(), @Rc/^B:
new ImprovedMergeSort(), RWX?B
new HeapSort() Bv=
}; 26e.Hu
4Go$OQ`
public static String toString(int algorithm){ d ynq)lf
return name[algorithm-1]; 80'!XKSP
} E]aQK.
M/d6I$~7z
public static void sort(int[] data, int algorithm) { ?W27 h
impl[algorithm-1].sort(data); Xur{nk~?
} hOOkf mOM
(yr<B_Y'MY
public static interface Sort { uV|%idC
public void sort(int[] data); [iO*t,3@h
} N=vb*3ECg
B$\,l.hE
public static void swap(int[] data, int i, int j) { 2HX#:y{\l
int temp = data; "sD[P3
data = data[j]; KUE}^/%z
data[j] = temp; }hm"49,O
} C"gH>G
} ?=FRnpU?