[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; ;T#t)oV
} k%hD<_:p
int i1=l; UgJlXB|a%2
int i2=mid+1; ~(aq3ngo.
for(int cur=l;cur<=r;cur++){ ejgg.G ^
if(i1==mid+1) Z;%
data[cur]=temp[i2++]; IL.Jx:(0
else if(i2>r) m6 hA,li
data[cur]=temp[i1++]; >-X&/i
else if(temp[i1] data[cur]=temp[i1++]; FAM`+QtNw
else U%oI*
data[cur]=temp[i2++]; WU<#_by g
} H7Y}qP5X
} C| Mh<,~E
+V2a|uvEc
} rA`zuYo
LvWU %?
改进后的归并排序: GZZLX19sq
U&u7d$ANP
package org.rut.util.algorithm.support; )[p8
#> CN,eiZ
import org.rut.util.algorithm.SortUtil; 6\5U%~78
>7;JZuVo
/** w-B\AK?}
* @author treeroot Lj~lfO
* @since 2006-2-2 .&sguAyG
* @version 1.0 E*(Q'p9C
*/ *uEU9fX
public class ImprovedMergeSort implements SortUtil.Sort { S BFhC
Y\+^\`Tqu
private static final int THRESHOLD = 10; _ <>+Dk&
cYbO)?mC_
/* @b>]q$)(}
* (non-Javadoc) JYSw!!eC
* FblGFm"P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :[ITjkhde0
*/ rA1 gH6D
public void sort(int[] data) { e\yj>tQJg
int[] temp=new int[data.length]; *s%s|/
mergeSort(data,temp,0,data.length-1); 6,@M0CX
} G!rcY5!J
dH`a|SVW9
private void mergeSort(int[] data, int[] temp, int l, int r) { >,] #~d
int i, j, k; dtg Ja_
int mid = (l + r) / 2; PU'v o4
if (l == r) OW-+23)sj
return; F)gL=6h
if ((mid - l) >= THRESHOLD) Qb(CH
mergeSort(data, temp, l, mid); 5Q%#Z L/'
else Y\op9Fw
insertSort(data, l, mid - l + 1); E_H1X'|qS4
if ((r - mid) > THRESHOLD) qS2%U?S7
mergeSort(data, temp, mid + 1, r); 2X*epU_1h
else xDQ$Ui.
insertSort(data, mid + 1, r - mid); 2f:'~ P56
ItRGq
for (i = l; i <= mid; i++) { ko5\*!|:lj
temp = data; 8p5'}Lq
} VqbiZOZ@
for (j = 1; j <= r - mid; j++) { D>|:f-Z6Z
temp[r - j + 1] = data[j + mid]; AGv;8'`
} .s!:p pwl
int a = temp[l]; v,M2|x\r}
int b = temp[r]; t[Q^Xp
for (i = l, j = r, k = l; k <= r; k++) { plf<O5'
if (a < b) { JHQ8o5bEQp
data[k] = temp[i++]; @?1%*/
a = temp; [=9R5.)c
} else { .Z^g 7 *s
data[k] = temp[j--]; B}MJ?uvA
b = temp[j]; sRMzU
} TgUQD(d^
} FdSaOod8
} lp9<j1Wl
nuCK7X
/** \O0fo^+U,,
* @param data r[,KE.^6~#
* @param l @"~\[z5
* @param i G` 8j ^H,
*/ r]E$uq bR
private void insertSort(int[] data, int start, int len) { c3}}cFe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w1}[lq@
} )F~_KD)7jJ
} |.S;z"v![
} [%@zH
} cr/|dc'
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堆排序： pP r<8tm[
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package org.rut.util.algorithm.support; tS9m8(Hr%Q
1y@-
import org.rut.util.algorithm.SortUtil; H,I}R
:D,YR(])
/** ew"Fr1UGYZ
* @author treeroot 7&QVw(:)M
* @since 2006-2-2 y H'\<bT
* @version 1.0 ~"wD4Ue
*/ nY8UJy}<oL
public class HeapSort implements SortUtil.Sort{ J~}UG]j n
)s8r(.W
/* (non-Javadoc) F#PJ+W*h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,qfa,O
*/ y{"E)YY
public void sort(int[] data) { vr vzV
MaxHeap h=new MaxHeap(); RasoOj$
h.init(data); U;nC)'~YW9
for(int i=0;i h.remove(); UQ8x#(`ak
System.arraycopy(h.queue,1,data,0,data.length); L,ra=SVF
} =I5XG"",
g\l;>
private static class MaxHeap{ R#`itIYh
"a g_
void init(int[] data){ ' EDi6
this.queue=new int[data.length+1]; \1Bgs^
for(int i=0;i queue[++size]=data; $W?XxgkB?
fixUp(size); nx4aGS"F:
} \fhT#/0N
} toWmm(7v
ZX0c_Mk=
private int size=0; H94.E|Q\+
p3S c4
private int[] queue; [s/@z*,M1
Z])_E6.
public int get() { Wk|z\OR(
return queue[1]; w=`z!x![/
} l+6\U6_)B
l#"alU!<^
public void remove() { Dr1F|[
SortUtil.swap(queue,1,size--); yRYWx` G
fixDown(1); s]N-n?'G"
} j[fQs,efK
file://fixdown 3wE8y&
private void fixDown(int k) { -b$OHFL
int j; Q#N+5<]J)#
while ((j = k << 1) <= size) { </X"*G't
if (j < size %26amp;%26amp; queue[j] j++; $imx-H`|
if (queue[k]>queue[j]) file://不用交换 c{Kl?0#[
break; (2li:1j
SortUtil.swap(queue,j,k); nADd,|xD3
k = j; /ZDc=>)~
} 5\S7Va;W
} 8x"d/D
private void fixUp(int k) { mc'p-orAf
while (k > 1) { gp HwiFc
int j = k >> 1; 9qDGxW '1
if (queue[j]>queue[k]) Dkb&/k:)
break; bw\=F_>L
SortUtil.swap(queue,j,k); (Pd>*G\
k = j; zl\#n:|
} d]3sC
} sJoi fl 7
!d\GD8|4
} #+ '@/5{n
m3!M L>nLt
} GU3/s&9
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SortUtil： F29AjW86
1%"` =$q%
package org.rut.util.algorithm; _zh5KP[{
>#?: x*[
import org.rut.util.algorithm.support.BubbleSort; d*$<%J
import org.rut.util.algorithm.support.HeapSort; L_mqC(vn
import org.rut.util.algorithm.support.ImprovedMergeSort; G 7]wg>*
import org.rut.util.algorithm.support.ImprovedQuickSort; Bx-,"Z \
import org.rut.util.algorithm.support.InsertSort; zfb _ )
import org.rut.util.algorithm.support.MergeSort; c0&'rxi(B
import org.rut.util.algorithm.support.QuickSort; v|@n8ED|@K
import org.rut.util.algorithm.support.SelectionSort; C8:"+;
import org.rut.util.algorithm.support.ShellSort; YZRB4T9
wF8\
/** j\f$r,4
* @author treeroot *]WXM.R8
* @since 2006-2-2 ~C/KA6H
* @version 1.0 <y!r~?
*/ UwkX[u
public class SortUtil { 0@lC5-=
public final static int INSERT = 1; &|}IBu:T
public final static int BUBBLE = 2; L_"(A #H:
public final static int SELECTION = 3; yrAzD=
public final static int SHELL = 4; q-%KfZ@(|
public final static int QUICK = 5; Ki/5xK=s
public final static int IMPROVED_QUICK = 6; `HG19_Z
public final static int MERGE = 7; 4QAIQQS
public final static int IMPROVED_MERGE = 8; k!=GNRRZE
public final static int HEAP = 9; r)(BT:2m
ACO4u<M)
public static void sort(int[] data) { VtiqAh}4
sort(data, IMPROVED_QUICK); IB{ZE/
} WV1 Z
private static String[] name={ |HGb.^f?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Us,[xQ
}; JjLyV`DJ
_F@p53WE
private static Sort[] impl=new Sort[]{ "jO3Y/>S
new InsertSort(), @O}j:b
new BubbleSort(), sLdUrD%
new SelectionSort(), o?K|[gNi
new ShellSort(), 6bKO;^0
new QuickSort(), DhNo +"!z
new ImprovedQuickSort(), otf%kG w
new MergeSort(), ll\^9 4]Q
new ImprovedMergeSort(), N5s|a5
new HeapSort() yI.H4Dl<
}; 8='21@wrN
KM}4^Qc
public static String toString(int algorithm){ )]>G,.9C}
return name[algorithm-1]; QYfAf3te
} eM=)>zl
'0')6zW5s
public static void sort(int[] data, int algorithm) { c48J!,jCd'
impl[algorithm-1].sort(data); %;(|KrUN
} _~ZQ b
xPMyG);
public static interface Sort { BX(d"z b<
public void sort(int[] data); ?ZHE8
} ?h)3S7
)^f9[5ee
public static void swap(int[] data, int i, int j) { %}MA5 t]o
int temp = data; ;%7XU~<a
data = data[j]; `3y!XET
data[j] = temp; (_qBsng:
} >9<8G]vcH
} O%K?l}e