[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; $U~=.!_du
} UHr{
int i1=l; {cmo^~[L$
int i2=mid+1; m{vT_ei
for(int cur=l;cur<=r;cur++){ a_Z.J3
if(i1==mid+1) ri"?,}(
data[cur]=temp[i2++]; -T2~W!
else if(i2>r) wu;7NatHx
data[cur]=temp[i1++]; SrdE>fNbs
else if(temp[i1] data[cur]=temp[i1++]; qo61O\qm
else N )'8o}E
data[cur]=temp[i2++]; ylkpYd
} y>@v>S
} RlU;v2Kch
`@4 2jG}*
} :-$cdZ3E
4,j4E@?pG9
改进后的归并排序: tDEXm^B2Sv
ooomi"u
package org.rut.util.algorithm.support; A(q~{
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import org.rut.util.algorithm.SortUtil; V/`#B$6
4Sg<r,G
/** \H,V 9!B
* @author treeroot +]A+!8%Z
* @since 2006-2-2 ,D:iQDG^
* @version 1.0 $/NGNkl[
*/ jAA'hA
public class ImprovedMergeSort implements SortUtil.Sort { kSLSxfR
tU9rCL:P
private static final int THRESHOLD = 10; /uC+.B9k
$|>6z_3%
/* ny278tr Q7
* (non-Javadoc) ?+bTPl;%'
* Tf9&,!>V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JCM)N8~i
*/ WA<H
public void sort(int[] data) { yonJd
int[] temp=new int[data.length]; dD[v=Z_
mergeSort(data,temp,0,data.length-1); "CIpo/ebL
} `DI{wqV9
HT{F$27W
private void mergeSort(int[] data, int[] temp, int l, int r) { 6>@(/mh*
int i, j, k; }9MW!Ss
int mid = (l + r) / 2; Z|]l"W*w
if (l == r) UeMnc 5y
return; !JT<(I2
if ((mid - l) >= THRESHOLD) xnl<<}4pJ
mergeSort(data, temp, l, mid); {;]uL`abi?
else &Tf=~6
insertSort(data, l, mid - l + 1); tfi2y]{A
if ((r - mid) > THRESHOLD) B(S5+Y
mergeSort(data, temp, mid + 1, r); mJwv&E
else #B}BI8o (
insertSort(data, mid + 1, r - mid); e7Yb=/F
]+}:VaeA
for (i = l; i <= mid; i++) { VFe-#"0ZO
temp = data; d[~au=b
} ^JYF1
for (j = 1; j <= r - mid; j++) { 0lLr[
temp[r - j + 1] = data[j + mid]; N%|^;4}k
} fMWXo)rzj
int a = temp[l]; (1j(* ?2
int b = temp[r]; @/_XS4
for (i = l, j = r, k = l; k <= r; k++) { hXV4$Dai
if (a < b) { vG'vgUo
data[k] = temp[i++]; &M!4]pow
a = temp; )OARO
} else { d_4n0Kh0
data[k] = temp[j--]; ;n yB
b = temp[j]; R*JOiVAC
} S#dyRTmI
} rnzsfr-|(2
} ,gAr|x7_
OGSEvfW
/** UMHuIA:%U
* @param data m _t(rn~f6
* @param l |_Naun=+~
* @param i o'x_g^ Y
*/ nr'YWW
private void insertSort(int[] data, int start, int len) { |YG)NO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rXHHD#\oF
} X+(aQ >y
} S&4w`hdD>~
} Sa?~t3*H
} rwi2kk#@P
`^s]?
堆排序： 9*GL@_c
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package org.rut.util.algorithm.support; c]cO[T_gGa
J@u!S~&r
import org.rut.util.algorithm.SortUtil; uAPLT~
1A,4Aw<
/** hEdo,gF*
* @author treeroot Ymrpf
* @since 2006-2-2 n:}MULy;
* @version 1.0 [*mCa:^
*/ rsIt~w
public class HeapSort implements SortUtil.Sort{ a=}">=]7
x|~D(zo
/* (non-Javadoc) `Cb<KAaCH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K8Kz
*/ 2i4Dal
public void sort(int[] data) { 1xFhhncf
MaxHeap h=new MaxHeap(); e!:?_z."
h.init(data); .@x"JI>;
for(int i=0;i h.remove(); N#2nH1C
System.arraycopy(h.queue,1,data,0,data.length); PBPJ/puW
} #b]}cwd!
;6\Ski0=l
private static class MaxHeap{ ;GSfN
:5q*46n
void init(int[] data){ @; j0c_^"!
this.queue=new int[data.length+1]; H|(*$!~e
for(int i=0;i queue[++size]=data; *aSRKY
fixUp(size); IdC k
} nKZRq&~^E
} q)zu}m
45!`g+)
private int size=0; S+e-b'++?
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private int[] queue; YA8yMh*4D?
V)@nRJg
public int get() { Wb}0-U{S'
return queue[1]; *YEIG#`
} HzO0K=Z=R0
)Or:wFSMq
public void remove() { .J7-4
SortUtil.swap(queue,1,size--); W4] 0qp`\
fixDown(1); 0ghwFo
} 'Rar>oU
file://fixdown :67d>wb
private void fixDown(int k) { 5p>]zij>
int j; A=2nj
while ((j = k << 1) <= size) { TTw~.x,
if (j < size %26amp;%26amp; queue[j] j++; "78cl*sD
if (queue[k]>queue[j]) file://不用交换 L>R!A3G1
break; OM"T)4z
SortUtil.swap(queue,j,k); b}q(YgH<
k = j; 0I AaPz/e
} (WU~e!}
} >f9]Nj
private void fixUp(int k) { COl%P
while (k > 1) { enfu%"(K)
int j = k >> 1; 5SPl#*W
if (queue[j]>queue[k]) 0ju wDd
break; }M"'K2_Z
SortUtil.swap(queue,j,k); ^_#gIT\
k = j; S+\Mt+o
} N[?4yV2s
} B )3SiU
#@OKp,LJ
} &hM,b!R|
-QHzf&D?
} f"}14V
d'eM(4R@
SortUtil： b ffml
& /FA>
package org.rut.util.algorithm; 0%L$TJ.''
Gm?"7R.
import org.rut.util.algorithm.support.BubbleSort; *IfIRR>3l(
import org.rut.util.algorithm.support.HeapSort; =_~'G^`tu
import org.rut.util.algorithm.support.ImprovedMergeSort; ]V[
import org.rut.util.algorithm.support.ImprovedQuickSort; %L=h}U13
import org.rut.util.algorithm.support.InsertSort; #$ raUNr
import org.rut.util.algorithm.support.MergeSort; '5+, lRu
import org.rut.util.algorithm.support.QuickSort; I{P$B-
import org.rut.util.algorithm.support.SelectionSort; -B++V
import org.rut.util.algorithm.support.ShellSort; Z;> aW;Wt
u+i/CE#w
/** #| e5
* @author treeroot !*QA;*e
* @since 2006-2-2 C&MqUj"]
* @version 1.0 }v|[h[cZ
*/ ]r{#268
public class SortUtil { ^`C*";8Q
public final static int INSERT = 1; &wWGZ~T
public final static int BUBBLE = 2; I>(z)"1
public final static int SELECTION = 3; b*%WAVt2T
public final static int SHELL = 4; b|pNc'u:Cn
public final static int QUICK = 5; dIh(~KqB
public final static int IMPROVED_QUICK = 6; #JT%]!
public final static int MERGE = 7; X]qp~:4G
public final static int IMPROVED_MERGE = 8; <P)%Ms
public final static int HEAP = 9; orN2(:Ct7
'bqf?3W
public static void sort(int[] data) { #cg@Z
sort(data, IMPROVED_QUICK); 7!d<>_oH
} 6b5{
private static String[] name={ _:z;j{@4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }&^bR)=
}; hFF&(t2{^
0~I) /T
private static Sort[] impl=new Sort[]{ }t{^*(
new InsertSort(), R=f5:8D<-
new BubbleSort(), 9bYHb'70
new SelectionSort(), Boz_*l|
new ShellSort(), ^rZ+H@p:6
new QuickSort(), J'&?=|
new ImprovedQuickSort(), )pj \b[
new MergeSort(), 'aSORVq^e[
new ImprovedMergeSort(), oFA$X Y
new HeapSort() =:T:9Y_i
}; ,PtR^" Mf4
Czl 8Q oH
public static String toString(int algorithm){ "+OMo-<K7
return name[algorithm-1]; d=Ihl30m
} X!'Xx8
(Y?yGq/
public static void sort(int[] data, int algorithm) { M)It(K8R
impl[algorithm-1].sort(data); S%%qn
} Vf2!0
wZolg~dg
public static interface Sort { "PM:&v
public void sort(int[] data); RB 0j!H:
} = ~R3*GN
>?\ !k c
public static void swap(int[] data, int i, int j) { lIT2 AFX+
int temp = data; R(#;yn
data = data[j]; |[t=.dK%
data[j] = temp; Z\yLzy#8
} D.JVEKLkU
} Jrrk$0H^~