[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; ht7l- AK
} 00'%EYO
int i1=l; :X0k]p
int i2=mid+1; M:XSQ["6>V
for(int cur=l;cur<=r;cur++){ ,C K{F
if(i1==mid+1) qT,Te
data[cur]=temp[i2++]; fg s!v7
else if(i2>r) 1cxrH+N
data[cur]=temp[i1++]; lAi6sPG)0
else if(temp[i1] data[cur]=temp[i1++]; j:<n+:HC
else *Y,x|F
data[cur]=temp[i2++]; $()5VMb
} 9Kpa><
} U}&2k
C+'/>=>a.
} t'?.8}?)I&
V:qSy#e
改进后的归并排序: b$4"i XSQ
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package org.rut.util.algorithm.support; 8u"!dq
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import org.rut.util.algorithm.SortUtil; MTsM]o
?: N@!jeJ
/** M}d_I+
* @author treeroot ahuGq'
* @since 2006-2-2 ?/BqD;{?I
* @version 1.0 K$>%e36Cc
*/ ->sm+H-*
public class ImprovedMergeSort implements SortUtil.Sort { {F3xJ[
prYs $j
private static final int THRESHOLD = 10; oT^{b\XN
5XO;N s
/* Q7*SE%H
* (non-Javadoc) YX=a#%vrl
* kv3E4,<9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3_txg>P"
*/ sA/pVU
public void sort(int[] data) { %oq{L]C(rf
int[] temp=new int[data.length]; 5Eg1Q YVt
mergeSort(data,temp,0,data.length-1); 1|RANy
} =5Q]m6-SgV
<PapskO>
private void mergeSort(int[] data, int[] temp, int l, int r) { 8s"%u )
int i, j, k; Q(lo{AFc
int mid = (l + r) / 2; uZM{BgXXD
if (l == r) 4NGA/ G
return; F=`AY^u0
if ((mid - l) >= THRESHOLD) /h+8A',
mergeSort(data, temp, l, mid); s1=X>'q
else :QpuO1Gu
insertSort(data, l, mid - l + 1); [p{#XwN
if ((r - mid) > THRESHOLD) s8wmCzB~
mergeSort(data, temp, mid + 1, r); 61.Brp.eP
else J!0DR4=Xi
insertSort(data, mid + 1, r - mid); !6BW@GeF]
:ZTc7}
for (i = l; i <= mid; i++) { :axRoRg
temp = data; xGu r
} |s"nM<ZNZ
for (j = 1; j <= r - mid; j++) { Nd`%5%'::
temp[r - j + 1] = data[j + mid]; !;0U,!WI
} 9 TvV=
int a = temp[l]; -}=i 04^
int b = temp[r]; ,u!*2cWN
for (i = l, j = r, k = l; k <= r; k++) { G;&-\0>W
if (a < b) { 1KMLG=
data[k] = temp[i++]; y&Mr=5:y
a = temp; >_e]C}QUr
} else { K&nE_.kbl
data[k] = temp[j--]; v 0 }@
b = temp[j]; M4zm,>?K
} Ey_" ~OB
} ZYI{i?Te#
} /]=C{)8
wp#'nO
/** L%BNz3:Dt
* @param data TatpXN\
* @param l >SML"+>
* @param i TcIcS]w%
*/ [K9'<Qnu
private void insertSort(int[] data, int start, int len) { KAC6Snu1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IOb*GTb
} :E_g"_
} xgpi-l
} 9^,Lc1"M>
} x97 j
0uWR<,]
堆排序： 3{""58
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package org.rut.util.algorithm.support; &QDW9 Mi
Z3{>yYR+
import org.rut.util.algorithm.SortUtil; 7Bb9t
v5By:z
/** Av"R[)
* @author treeroot "$N#p5
* @since 2006-2-2 L!rw[x
* @version 1.0 L{hnU7sY
*/ VTG9$rQZ
public class HeapSort implements SortUtil.Sort{ n;(\5{a
]F;f`o
/* (non-Javadoc) k *Q<3@S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YQ39A_e g
*/ zN!ZyI$nqP
public void sort(int[] data) { Q,p}:e
MaxHeap h=new MaxHeap(); Db)?i?o}t
h.init(data); ?0)&U
for(int i=0;i h.remove(); F">Qpgt
System.arraycopy(h.queue,1,data,0,data.length); oX0D
} q8s0AN'@t'
OJ/,pLYu
private static class MaxHeap{ Ko;{I?c
0}$Hi
void init(int[] data){ b+@JY2dvj
this.queue=new int[data.length+1]; 0|$v-`P$
for(int i=0;i queue[++size]=data; CPP` qt%f
fixUp(size); nyBJb(5"B
} c/zJv*}x?
} WpF2)R}G=
+)j$|x~(A
private int size=0; c%&:6QniZ
!'mq ?C=
private int[] queue; _acE:H
0Uz\H0T1
public int get() { UG2nX3?
return queue[1]; p /#$io
} Rniq(FAx
rypTKT|U;
public void remove() { {jYOsl
SortUtil.swap(queue,1,size--); T2SP W@#Z3
fixDown(1); 4T!+D
} Q.]}]QE
file://fixdown c8L~S/t
private void fixDown(int k) { %7"X(Ts7B
int j; iTag+G4*
while ((j = k << 1) <= size) { "kMguK}c
if (j < size %26amp;%26amp; queue[j] j++; wm)#[x #
if (queue[k]>queue[j]) file://不用交换 bKrhIU[
break; D+]a.& {p
SortUtil.swap(queue,j,k); 3 |hHR
k = j; qxFB%KqU
} eU<]o< \Qo
} O+?<h{"
private void fixUp(int k) { c3:,Ab|
while (k > 1) { UVw~8o9s
int j = k >> 1; ag*mG*Z
if (queue[j]>queue[k]) :cq9f2)
break; EX?MA6U
SortUtil.swap(queue,j,k); ^1Zeb$Nw'
k = j; } p&&_?
} 4W3\P9p=
} 6`v7c!7
\RvvHty-V
} jFA{+Yr1
"Qja1TQ
} CAcS~ "
"\}@gV#r$A
SortUtil： u>TZt]h8
-[6z 1"*
package org.rut.util.algorithm; *d"DA[(
epU:
import org.rut.util.algorithm.support.BubbleSort; \ C+(~9@|
import org.rut.util.algorithm.support.HeapSort; #a`a$A
import org.rut.util.algorithm.support.ImprovedMergeSort; 0KGY\,ae:;
import org.rut.util.algorithm.support.ImprovedQuickSort; `e(vH`VZ
import org.rut.util.algorithm.support.InsertSort; Xlb0/T<g!
import org.rut.util.algorithm.support.MergeSort; .Fnwm}
import org.rut.util.algorithm.support.QuickSort; UEozAY
import org.rut.util.algorithm.support.SelectionSort; yqi^>Ce0
import org.rut.util.algorithm.support.ShellSort; "FTfk
f. FYR|%tq
/** SE),":aY
* @author treeroot ``OD.aY^s
* @since 2006-2-2 2 !At2P2
* @version 1.0 VUhbD
*/ SQqD:{#g"
public class SortUtil { L{(QpgHZ
public final static int INSERT = 1; #B:hPZM1
public final static int BUBBLE = 2; \ gLHi~
public final static int SELECTION = 3; |b*? qf
public final static int SHELL = 4; ^4,a8`
public final static int QUICK = 5; Sqo :-
public final static int IMPROVED_QUICK = 6; Y=?yhAw
public final static int MERGE = 7; hi0R.V&
public final static int IMPROVED_MERGE = 8; L+CyQq
public final static int HEAP = 9; TZ2=O<Kj
:'*DPB-
public static void sort(int[] data) { 7vABq(
sort(data, IMPROVED_QUICK); ( YQWbOk
} *,Za6.=
private static String[] name={ {%IExPJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e_/b2"{
}; w~ [b*$
f|R"uW +
private static Sort[] impl=new Sort[]{ u%/goxA
new InsertSort(), ]R=,5kK3
new BubbleSort(), RTv qls
new SelectionSort(), lWqrU1Sjl
new ShellSort(), # g_Bx
new QuickSort(), #/I[Jqf
new ImprovedQuickSort(), ]|sAK%/
new MergeSort(), nv0]05.4
new ImprovedMergeSort(), t`+'r}=d
new HeapSort() h}]fnA
}; K^B%/T]d
J,zO2572u
public static String toString(int algorithm){ 4"xPr[=iG
return name[algorithm-1]; cCa|YW^j
} NcP.;u;`
gS:A'@&
public static void sort(int[] data, int algorithm) { Oi:<~E[kz.
impl[algorithm-1].sort(data); ?c7*_<W5
} A?`jnRo=\
Zc!@0
public static interface Sort { e'=MQ,EWd
public void sort(int[] data); +3&zN(
} qA!]E^0*Ke
ei6AV1| p
public static void swap(int[] data, int i, int j) { h;-yU.(w
int temp = data; q+[SbG&
data = data[j]; H)>@/"j;
data[j] = temp; #(1j#\
} ZeEWp3vW
} ^;Sy. W&`