[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; 3e"G.0vJ
} 5m/r,d^H
int i1=l; RV~w+%f
int i2=mid+1; h$3Y,-4
for(int cur=l;cur<=r;cur++){ ~lMsD~$sO
if(i1==mid+1) qe0@tKim
data[cur]=temp[i2++]; {=kA8U
else if(i2>r) /#HY-b
data[cur]=temp[i1++]; !&X}?NK
else if(temp[i1] data[cur]=temp[i1++]; HV>Wf"1
else CUoMB r
data[cur]=temp[i2++]; MTQdyTDHl
} sfH|sp
} r\yj$Gu>(
)pJzw-m"
} ?tOzhrv
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改进后的归并排序: WWY9U
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package org.rut.util.algorithm.support; phTZUmi
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import org.rut.util.algorithm.SortUtil; *fx<>aK
nBQG.3
/** VFyt9:a
* @author treeroot }=++Lr4*
* @since 2006-2-2 NLj0\Pz|B
* @version 1.0 15870xS
*/ ^+pmZw90
public class ImprovedMergeSort implements SortUtil.Sort { _A(J^;?
tFRWxy[5
private static final int THRESHOLD = 10; P5Fm<f8\
V'_^g7}l&
/* /dCZoz~~T
* (non-Javadoc) ^0VI J)y
* o] = &
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `XTu$+
*/ _3`{wzMA
public void sort(int[] data) { b2z~C{l
int[] temp=new int[data.length]; ";Lpf]<
mergeSort(data,temp,0,data.length-1); he/FtkU
} Eh JYdO[e
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private void mergeSort(int[] data, int[] temp, int l, int r) { 1w35H9\g
int i, j, k; E*[X\70
int mid = (l + r) / 2; WL>"hkx
if (l == r) Yx,
return; P /Js!e<\
if ((mid - l) >= THRESHOLD) RS$e^_W
mergeSort(data, temp, l, mid); KktQA*G
else H4)){\
insertSort(data, l, mid - l + 1); f9!wO';P6
if ((r - mid) > THRESHOLD) ~6R| a
mergeSort(data, temp, mid + 1, r); |n0 )s% 8`
else {BgGG@e
insertSort(data, mid + 1, r - mid); wAITE|H<zj
B4I|"5G2y
for (i = l; i <= mid; i++) { J)66\h=
temp = data; C8i}~x<
} s`&8tP
for (j = 1; j <= r - mid; j++) { Lt_7pb%
temp[r - j + 1] = data[j + mid]; T*z >A
} O||M |
int a = temp[l]; I#m5Tl|#
int b = temp[r]; .HMO7n6)8l
for (i = l, j = r, k = l; k <= r; k++) { H!,#Z7s
if (a < b) { <V9L AWeS
data[k] = temp[i++]; 9Y~A2C
a = temp; <s $~h
} else { d!8`}L:=M
data[k] = temp[j--]; ]XU?Wg
b = temp[j]; ;/$zBr`'
} z!eY=G'
} faThXq8B
} gVk_<;s
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/** w$pBACX
* @param data ><dSwwu
* @param l EI]NOG 0
* @param i ']>@vo4kK{
*/ JhIgqW2
private void insertSort(int[] data, int start, int len) { S's\M5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7\eN8+
} {p+7QlgK
} Lylw('zZ
} C;M.dd
} *s<FEF
!|hv49!H
堆排序： 2?#IwT'
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package org.rut.util.algorithm.support; }h>QkV,{2
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import org.rut.util.algorithm.SortUtil; }_Jr[iaB
#"=_GA^.{
/** ggfL d r
* @author treeroot 9PIm/10pP^
* @since 2006-2-2 hC=9%u{r?
* @version 1.0 V07e29w
*/ BJwPSKL
public class HeapSort implements SortUtil.Sort{ t=Tu-2,k
]HCu tq
/* (non-Javadoc) )k{zRq:d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S8^W)XgC;
*/ D^$Nn*i;U
public void sort(int[] data) { lt[{u$
MaxHeap h=new MaxHeap(); H0_hQ:K
h.init(data); eo4;?z
for(int i=0;i h.remove(); 9=89)TrY
System.arraycopy(h.queue,1,data,0,data.length); 9U^jsb<St>
} wz<YflF
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private static class MaxHeap{ G BV]7.
\E5%.KR
void init(int[] data){ #/\5a;Elc
this.queue=new int[data.length+1]; E80C0Q+V
for(int i=0;i queue[++size]=data; HI*xk
fixUp(size); |]w0ytL>(2
} {=VauF
} :%~+&qS
-$!`8[fM
private int size=0; ayTEQS
17 Hdj
private int[] queue; 4Bsx[~ u&
8(&Jy RT
public int get() { icOh/G=N;
return queue[1]; =Wn11JGh
} be}^}w=
WgF Xv@Jjt
public void remove() { T1.`*,t)=
SortUtil.swap(queue,1,size--); u|z B\zd
fixDown(1); $fR[zBxA
} L&H4fy!>
file://fixdown |f#~#Y2v
private void fixDown(int k) { CXwDG_e
int j; *W~+Nho.A
while ((j = k << 1) <= size) { ]#z^[XG
if (j < size %26amp;%26amp; queue[j] j++; epqX2`!V
if (queue[k]>queue[j]) file://不用交换 CA, &R<]
break; pn<M`,F~q
SortUtil.swap(queue,j,k); x >hnH{~w
k = j; ep* (
} r~N0P|Tq
} <05\
private void fixUp(int k) { ^NKB
while (k > 1) { *_ {w0U)
int j = k >> 1; ),1MR=
if (queue[j]>queue[k]) 7+QD=j-
break; dOh`F~ Y)e
SortUtil.swap(queue,j,k); Y5M>&}N
k = j; l6IpyIex
} 1A^~gYr
} |}P4Gr}6
`'H"|WsT
} $$_aHkI j
K6d9[;F
} (P&~PJH
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SortUtil： 794V(;sW,
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package org.rut.util.algorithm; ~vgm;O
zBg>I=hiG
import org.rut.util.algorithm.support.BubbleSort; R`sU5:n
import org.rut.util.algorithm.support.HeapSort; >jMq-#*4
import org.rut.util.algorithm.support.ImprovedMergeSort; i'aV=E5
import org.rut.util.algorithm.support.ImprovedQuickSort; Rl@k~;VV
import org.rut.util.algorithm.support.InsertSort; xrd@GTaI
import org.rut.util.algorithm.support.MergeSort; !c,=%4Pb
import org.rut.util.algorithm.support.QuickSort; z'OY6
import org.rut.util.algorithm.support.SelectionSort; 2YI#J.6]H
import org.rut.util.algorithm.support.ShellSort; r*CI6yP
AdMA|!|:hc
/** \}[{q
* @author treeroot sJu^deX
* @since 2006-2-2 Ad!= *n
* @version 1.0 @LZ'Qc }@
*/ OCIWQ/ P
public class SortUtil { Vf<VKP[9K
public final static int INSERT = 1; !.9pV.~
public final static int BUBBLE = 2; frV*+
public final static int SELECTION = 3; ^|-*amh
public final static int SHELL = 4; X=$WsfN.h
public final static int QUICK = 5; n%GlOKC
public final static int IMPROVED_QUICK = 6; PEqO<a1Z8
public final static int MERGE = 7; ~$xLR/{y
public final static int IMPROVED_MERGE = 8; WxwSb`U|
public final static int HEAP = 9; xrb %-vT
Rrh?0qWs
public static void sort(int[] data) { \l)<NZ\
sort(data, IMPROVED_QUICK); [gI;;GW
} ClZ:#uMbN
private static String[] name={ owHV&(Go(B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5=]q+&y\H
}; r#ES|
xDv5'IGBb
private static Sort[] impl=new Sort[]{ CZaUrr
new InsertSort(), evOyTvc
new BubbleSort(), 1haNca_6,
new SelectionSort(), w;@DcX$]
new ShellSort(), pd2Lc $O@
new QuickSort(), d67Q@')00
new ImprovedQuickSort(), ]XX9.Xh=-
new MergeSort(), 6~g`B<(?
new ImprovedMergeSort(), c|?0iN
new HeapSort() F|.,lb |L
}; GiI|6z!
@n<y[WA
public static String toString(int algorithm){ L,G{ t^j
return name[algorithm-1]; ;\~{79c
} TTB1}j+V6
H{}0-0o
public static void sort(int[] data, int algorithm) { f`Km ctI
impl[algorithm-1].sort(data); lFvRXV^+f
} :6R0=oz
hF`e>?bN
public static interface Sort { W[B%,Km%]
public void sort(int[] data); t[gz#'
} %g1{nGah
"p]bsJG
public static void swap(int[] data, int i, int j) { `R:p-"'b
int temp = data; *6uZ"4rb.
data = data[j]; R7axm<PR=
data[j] = temp; %tx~CD
} ?M2#fD]e
} !&4<"wQ