[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; 9yu\ Ot
} MR7}s4o
int i1=l; ZmqKQO
int i2=mid+1; wVXS%4|v
for(int cur=l;cur<=r;cur++){ Z3e| UAif
if(i1==mid+1) uh_RGM&
data[cur]=temp[i2++]; `cn#B BV
else if(i2>r) 2ACCh4(/P
data[cur]=temp[i1++]; Eh`7X=Z7E
else if(temp[i1] data[cur]=temp[i1++]; Ufj`euY
else ,^r9n[M4M
data[cur]=temp[i2++]; )iX~}7
} o#)C^xlQ
} 'c&Ed
T.F!+
} *U-4Sy
~Gp[_ %K
改进后的归并排序: .<?GS{6 N
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package org.rut.util.algorithm.support; 0JS?;fk
bRDYGuC
import org.rut.util.algorithm.SortUtil; e ,'_xV
OKZV{Gja
/** 234p9A@
* @author treeroot GMx&y2. Z
* @since 2006-2-2 ;>hO+Wo
* @version 1.0 `RT>}_j
*/ iXkF1r]i
public class ImprovedMergeSort implements SortUtil.Sort { qbr$>xH
]#<4vl\
private static final int THRESHOLD = 10; ]EbM9Fo-U
^0)g/`H^>
/* NX.6px17
* (non-Javadoc) GKqm&/M*=
* ;O5zUl-`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ty\R=y}}
*/ ;C#F>SG\S
public void sort(int[] data) { +480 l}
int[] temp=new int[data.length]; ,pfG
mergeSort(data,temp,0,data.length-1); M^Yh|%M
} R{4^t97wH{
,,.QfUj/&
private void mergeSort(int[] data, int[] temp, int l, int r) { 6- YU[HF
int i, j, k; "Y.tht H
int mid = (l + r) / 2; !TH) +zi
if (l == r) Kn{4;Xk\
return; 3NqB <J
if ((mid - l) >= THRESHOLD) \\ij(>CI
mergeSort(data, temp, l, mid); :G=fl)!fE
else Ny7S
insertSort(data, l, mid - l + 1); 5I;&mW`1,`
if ((r - mid) > THRESHOLD) /<k/7TF`
mergeSort(data, temp, mid + 1, r); (/YHk`v2
else <nf@U>wlw
insertSort(data, mid + 1, r - mid); ]mq|w
m~ABC#,2
for (i = l; i <= mid; i++) { -IudgO]
temp = data; qo~O|~
} EWt[z.`T1
for (j = 1; j <= r - mid; j++) { //MUeTxR
temp[r - j + 1] = data[j + mid]; **0~K";\
} h4}84}5d
int a = temp[l]; 0auYG><=
int b = temp[r]; aK~8B_5k8
for (i = l, j = r, k = l; k <= r; k++) { 8`{:MkXP
if (a < b) { aKDKmHd
data[k] = temp[i++]; ;1=1:S8
a = temp; xa*hi87L*
} else { r<EY]f^`u
data[k] = temp[j--]; R^fPIv`q
b = temp[j]; uMv,zO5
} bWS&Yk(
} FxY}m
} lFj]4
T<>,lQs(a
/** E=Bf1/c\
* @param data Oszj$C(jF
* @param l :,7hWs
* @param i ttQGoUkj
*/ fbvL7* (
private void insertSort(int[] data, int start, int len) { ~=LE0.3[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hE/cd1iJ$
} S@tLCqV4
} ^ +\dz
} #%2rP'He
} 5;WH:XM
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堆排序： MchA{p&Ol
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package org.rut.util.algorithm.support; A{zN| S[
(mB&m@-N
import org.rut.util.algorithm.SortUtil; 2pCaX\t
Rv>-4@fMJ
/** Q{>k1$fkV
* @author treeroot K5 z<3+
* @since 2006-2-2 R29~~IOqO
* @version 1.0 Dy&i&5E.-l
*/ =svN#q5s
public class HeapSort implements SortUtil.Sort{ ~8+ Zs
@ q3k%$4
/* (non-Javadoc) o/)h"i0P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JR|ck=tq
*/ 1&OW4_
public void sort(int[] data) { HJH{nz'Lw
MaxHeap h=new MaxHeap(); RB\uK 1+
h.init(data); :OZrH<SW
for(int i=0;i h.remove(); _f,C[C[e&
System.arraycopy(h.queue,1,data,0,data.length); djZqc5t
} c6]U E@A
s8Q 5ui]
private static class MaxHeap{ :-Z2:/P
qR{=pR
void init(int[] data){ hfTY.
this.queue=new int[data.length+1]; ?^{Ah}x
for(int i=0;i queue[++size]=data; H?Wya.7
fixUp(size); IOH}x4
} kD%( _K5
} }8z?t:|S
} OR+Io
private int size=0; =qIp2c}Rx
B$K=\6o
private int[] queue; Q&;9x?e
?V=ZIGj
public int get() { (t|Zn@uY
return queue[1]; w9imKVry
} *^4"5X@
n>XdU%&
public void remove() { ^ @5QP$.
SortUtil.swap(queue,1,size--); V!=,0zy~Z
fixDown(1); *&W"bOMH*
} J8(lIk:e
file://fixdown &z3o7rif$
private void fixDown(int k) { 0d&6lqTo
int j; NI]N4[8(
while ((j = k << 1) <= size) { aXYY:;
if (j < size %26amp;%26amp; queue[j] j++; Y.UFbrv
if (queue[k]>queue[j]) file://不用交换 'H!Uh]!
break; ,4$>,@WW~
SortUtil.swap(queue,j,k); P@B]
k = j; x9g#<2w8
} ^x,YW]AS}
} O/Crd/
private void fixUp(int k) { 8<.Oq4ku
while (k > 1) { Il'fL'3
int j = k >> 1; t*u:hex
if (queue[j]>queue[k]) +6\Zj)
break; n\53wh@+
SortUtil.swap(queue,j,k); W!(zT6#
k = j; Sm|6 %3
} AkV#J, 3LC
} eMsd37J
Hn"RH1Zy
} r19 pZAc
X"Swi&4
} NLqzi%s
da(<K}
SortUtil： T5h H
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package org.rut.util.algorithm; zF<R'XP
@9s$4DS
import org.rut.util.algorithm.support.BubbleSort; 5;EvNu
import org.rut.util.algorithm.support.HeapSort; L4HI0Mx
import org.rut.util.algorithm.support.ImprovedMergeSort; =,M5KDk`
import org.rut.util.algorithm.support.ImprovedQuickSort; *]X'( /b_
import org.rut.util.algorithm.support.InsertSort; ez$(c
import org.rut.util.algorithm.support.MergeSort; Rm( "=(
import org.rut.util.algorithm.support.QuickSort; }7Q%6&IR
import org.rut.util.algorithm.support.SelectionSort; ga+dt
import org.rut.util.algorithm.support.ShellSort; ux4POO3C|
i_%_x*
/** !|(NgzDP/
* @author treeroot K|, .C[
* @since 2006-2-2 1+s;FJ2}
* @version 1.0 g- gV2$I
*/ K"MX!
public class SortUtil { y6a3tG
public final static int INSERT = 1; 0H:X3y+
public final static int BUBBLE = 2; WsB?C&>x
public final static int SELECTION = 3; U xGApK=X
public final static int SHELL = 4; *EH~_F
public final static int QUICK = 5; 1qA;/-Zr<o
public final static int IMPROVED_QUICK = 6; M= (u]%\
public final static int MERGE = 7; !Uo4,g6r+
public final static int IMPROVED_MERGE = 8; "y}5;9#,
public final static int HEAP = 9; MQ2}EY*A
upmx $H>
public static void sort(int[] data) { mfr|:i
sort(data, IMPROVED_QUICK); z{QqY.Gu{G
} ~"!fP3"e
private static String[] name={ 75lA%| *X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N!}f}oF
}; %N._w!N<5n
6gDN`e,@
private static Sort[] impl=new Sort[]{ {Sh ;(.u^
new InsertSort(), W>r+h-kR
new BubbleSort(), J&_n9$
new SelectionSort(), Pq$n5fZC!
new ShellSort(), 1% `Rs
new QuickSort(), ?r4>"[
new ImprovedQuickSort(), =3P)q"
new MergeSort(), :ws<-Qy
new ImprovedMergeSort(), At;LO9T3z
new HeapSort() h?U O&(
}; "{t$nVJ
Vurqt_nb
public static String toString(int algorithm){ %cn<ych G
return name[algorithm-1]; SpBy3wd
} DEgXQ[
LghfM"g
public static void sort(int[] data, int algorithm) { KI.hy2?e
impl[algorithm-1].sort(data); vY3h3o
} A#,ZUOPGH
fz_r7?
public static interface Sort { .}+}8[p4l
public void sort(int[] data); *-X[u:
} %BODkc Zh
UiNP3TJ'L
public static void swap(int[] data, int i, int j) { V;=cwy)I
int temp = data; 6y<EgYzdE
data = data[j]; uxz^/Gk
data[j] = temp; Y]a@j!
} %C]>9."
} !G|@6W`