[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; P?M WT]fY
} x3=SMN|a
int i1=l; 7HQ|3rt
int i2=mid+1; K]>X31Ho
for(int cur=l;cur<=r;cur++){ oN.#q$\` k
if(i1==mid+1) RA:3ZV
data[cur]=temp[i2++]; +{&++^(}a
else if(i2>r) I*= =I4qx
data[cur]=temp[i1++]; z?g\w6
else if(temp[i1] data[cur]=temp[i1++]; y.WEO>
else '+\.&'A
data[cur]=temp[i2++]; }N#hg>; B
} ft Rza
} 9:CM#N~?o
IUwMIHq&sW
} aeTVcq
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改进后的归并排序: a>)|SfsE
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package org.rut.util.algorithm.support; hR~~k~84
`j(-y`fo
import org.rut.util.algorithm.SortUtil; uVLKR PY
6cTd SE
/** Eh.NJI(
* @author treeroot @l@erCw@
* @since 2006-2-2 %g=SkQ&d
* @version 1.0 F44KbUH
*/ u\}"l2 r
public class ImprovedMergeSort implements SortUtil.Sort { Xs$UpQo
~d&W;mef-
private static final int THRESHOLD = 10; ]t.6bb4
8i?:aN[.1b
/* Aw7_diK^
* (non-Javadoc) u*<knZ~ty
* 52z{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7\Wq:<JL
*/ L%0G >2x
public void sort(int[] data) { 3W"l}.&ZJ"
int[] temp=new int[data.length]; 1zJ)x?
mergeSort(data,temp,0,data.length-1); 76RFu@k
} //-;uEO
'mE!,KeS;
private void mergeSort(int[] data, int[] temp, int l, int r) { NekPl/4
int i, j, k; ~Jx0#+z9V
int mid = (l + r) / 2; K_CE.8G&{
if (l == r) _Rm1-,3
return; Ggp.%kS6F
if ((mid - l) >= THRESHOLD) J(=io_\bO
mergeSort(data, temp, l, mid); z3Q#Wmv2
else 45$FcK
insertSort(data, l, mid - l + 1); PuGc{kt
if ((r - mid) > THRESHOLD) eaCh;IpIf
mergeSort(data, temp, mid + 1, r); 3.<E{E!F
else nypG
insertSort(data, mid + 1, r - mid); !t!\b9=
KVZ-T1K
for (i = l; i <= mid; i++) { ;A;FR3=)
temp = data; jP"l5
} M5T4{^i
for (j = 1; j <= r - mid; j++) { D:vX/mf;7
temp[r - j + 1] = data[j + mid]; XPsRa[08WK
} pkT26)aW
int a = temp[l]; kNrN72qg
int b = temp[r]; o-r00H|
for (i = l, j = r, k = l; k <= r; k++) { >Eqr/~Q
if (a < b) { mPS27z(
data[k] = temp[i++]; e|S_B*1*0
a = temp; Gsa~zGN
} else { yHjuT+/wM,
data[k] = temp[j--]; 8a,pDE
b = temp[j]; L@>$ Aw
} x4%1P w
} [ T!0ka
} (hFyp}jkk
$hq'9}ASOL
/** SVJt= M
* @param data RSK5 }2
* @param l $Z[W}7{pt#
* @param i )H|cri~D
*/ c-q=Ct
private void insertSort(int[] data, int start, int len) { lmpBf{~ S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9HBRWh6
} $v0beN6MG
} HGl.dO7NU
} =@y ?Np^A
} >N8*O3
/+ Q3JS(
堆排序： \<0xg[
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package org.rut.util.algorithm.support; L wP
['jr+gIfQ
import org.rut.util.algorithm.SortUtil; nC(<eL
=]m,7v Rq
/** EUjA-L(
* @author treeroot jSd[
* @since 2006-2-2 iM(Q-%HP_
* @version 1.0 r%412#
*/ t5;)<N`
public class HeapSort implements SortUtil.Sort{ gUHx(Fi[4
dBNx2T}_0
/* (non-Javadoc) L5 Q^cY]p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jHQnD]Hr
*/ RAB'%CY4
public void sort(int[] data) { p4^&G/'
MaxHeap h=new MaxHeap(); (L'|n*Cr
h.init(data); Qs\*r@6?
for(int i=0;i h.remove(); 8"yZS)09
System.arraycopy(h.queue,1,data,0,data.length); Wf:LYL
} pX?/=T@ Bw
)zK@@E
private static class MaxHeap{ r<c&;*
KGJ*h
void init(int[] data){ _:7:ixN[Ie
this.queue=new int[data.length+1]; kcG_ n
for(int i=0;i queue[++size]=data; H7dT6`<~Y
fixUp(size); k keDt+^
} ODNZLCB~t
} gAr=fq-|
]8/g[Ii
private int size=0; Q:U>nm>xA
hI 1or4V
private int[] queue; \dJOZ2J<z
2KtK.2;7
public int get() { PnZC I!Mw
return queue[1]; 1\ Gxk&
} \[&&4CN{
i!;9A6D
public void remove() { _"[Ls?tRX
SortUtil.swap(queue,1,size--); 6KDm#7J
fixDown(1); G.3yuok9
} Q)Q1a;o
file://fixdown |Pi! UZB
private void fixDown(int k) { qNi`OVh&
int j; -CLBf'a
while ((j = k << 1) <= size) { c<,R,DR
if (j < size %26amp;%26amp; queue[j] j++; aUk]wiwIR9
if (queue[k]>queue[j]) file://不用交换 2#oU2si
break; JA~q}C7A7o
SortUtil.swap(queue,j,k); Lu CiO
k = j; X^Fc^U8
} ?&?5x%|.<
} qs!A)H#
private void fixUp(int k) { i2+_~$f
while (k > 1) { *Gul|Lp$<I
int j = k >> 1; ]-;MY@
if (queue[j]>queue[k]) spT$}F2n
break; >R}G
SortUtil.swap(queue,j,k); U^8S@#1Q
k = j; dngG=
} M $f6.j
} h43py8v
eZBC@y
} \,ne7G21j
0*E_D
} Q^bYx (r5w
J`[gE`d
SortUtil： 83J63Xa
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package org.rut.util.algorithm; {krBAz&
-&l%CR,U
import org.rut.util.algorithm.support.BubbleSort; [kf6bf@
import org.rut.util.algorithm.support.HeapSort; 9yz@hdG
import org.rut.util.algorithm.support.ImprovedMergeSort; %n6NVi_[
import org.rut.util.algorithm.support.ImprovedQuickSort; /@B2-.w
import org.rut.util.algorithm.support.InsertSort; WK0:3q(P
import org.rut.util.algorithm.support.MergeSort; 6MNrH
import org.rut.util.algorithm.support.QuickSort; $0k7W?tu
import org.rut.util.algorithm.support.SelectionSort; lffw "
import org.rut.util.algorithm.support.ShellSort; X;n09 L`CB
1,P\dGmu
/** Y#QXvo%
* @author treeroot }bSDhMV;
* @since 2006-2-2 c h}wXn
* @version 1.0 -lrcb/)Gz
*/ k~F;G=P
public class SortUtil { nZ)E @
public final static int INSERT = 1; Z~F*$jn
public final static int BUBBLE = 2; H:S<O%f
public final static int SELECTION = 3; ] n\]ao
public final static int SHELL = 4; `hdN 6PgK
public final static int QUICK = 5; }?o4MiLB
public final static int IMPROVED_QUICK = 6; '{-Ic?F<P
public final static int MERGE = 7; W-*HAS
public final static int IMPROVED_MERGE = 8; nxB[To*P
public final static int HEAP = 9; .yDGwLry
/b\c<'3NY
public static void sort(int[] data) { `~z[Hj=2
sort(data, IMPROVED_QUICK); zhJ0to[%?
} 5|cRHM#
private static String[] name={ 'E&tEbY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AGm=0Om
}; wJD'q\n
N<ux4tz
private static Sort[] impl=new Sort[]{ ,}O33BwJp
new InsertSort(), C`R<55x6
new BubbleSort(), iL2__TO
new SelectionSort(), 5KP\#Y
new ShellSort(), OADW;fj
new QuickSort(), Ot)S\s>
new ImprovedQuickSort(), G<* Iw>ep
new MergeSort(), C1+f\A|9FP
new ImprovedMergeSort(), .9N7`
new HeapSort() #uF`|M$u
}; ~KRS0^
y+Hz(}4
public static String toString(int algorithm){ D(OJr5Gg
return name[algorithm-1]; 1$+8wDVwad
} 8Ihl}aguW
jZC[_p;
public static void sort(int[] data, int algorithm) { IJt'[&D
impl[algorithm-1].sort(data); +xvn n
} 8N+T=c
``eam8Az_U
public static interface Sort { <nb%$2r1
public void sort(int[] data); K8Q3~bMf
} `a!9_%|8
Rj4C-X4=
public static void swap(int[] data, int i, int j) { vQ]d?Tp
int temp = data; ([ -i5
data = data[j]; U1HG{u,"y
data[j] = temp; D6H?*4f]
} $8xb|S[
} p_(En4QSH