[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; B@]7eVo
} `I8^QcP
int i1=l; swlWe}1
int i2=mid+1; ,}tdfkZFYl
for(int cur=l;cur<=r;cur++){ IDh`0/i]
if(i1==mid+1) Zir`IQ$
data[cur]=temp[i2++]; SR& mHI-f0
else if(i2>r) skz]@{38
data[cur]=temp[i1++]; F}]_/cY7B
else if(temp[i1] data[cur]=temp[i1++]; Q:O>kCDV
else /6?plt&CA
data[cur]=temp[i2++]; y!gM)9vq
} j7 =3\SO
} ~ ZL`E
Fnpn_O XlH
} X~he36-+<
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改进后的归并排序: 9|?Lz
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package org.rut.util.algorithm.support; pRvs;klf
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import org.rut.util.algorithm.SortUtil; ~n^G<iXLp
0f%:OU5Y
/** ;_/q>DR>,3
* @author treeroot Sx)Il~ x
* @since 2006-2-2 {z/^X<T
* @version 1.0 9.zQ<k2
*/ B)]{]z0+`
public class ImprovedMergeSort implements SortUtil.Sort { 4nH91Z9=
*Qx|5L!_
private static final int THRESHOLD = 10; 9ET+k(wI@
" ^baiN@ac
/* 7f%Qc %B
* (non-Javadoc) hIQ[:f
* %hbLT{w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IZ0$=aB7
*/ *ZR@z80i
public void sort(int[] data) { e=l5j"gq
int[] temp=new int[data.length]; 0?us]lx
mergeSort(data,temp,0,data.length-1); @JEmybu
} CQHp4_
d?M!acB
private void mergeSort(int[] data, int[] temp, int l, int r) { Tn0l|GRuZA
int i, j, k; n&m?BuG
int mid = (l + r) / 2; |3:=qpT-
if (l == r) >&vO4L
return; $U1kP?pR
if ((mid - l) >= THRESHOLD) Ws*PMK.0
mergeSort(data, temp, l, mid); bo;pj$eR3R
else -;)SER3Wq4
insertSort(data, l, mid - l + 1); 46Q;F
if ((r - mid) > THRESHOLD) 5o| !f
mergeSort(data, temp, mid + 1, r); IR dz(~CP
else 7ml0
insertSort(data, mid + 1, r - mid); 4A/,X>W61
%HF$
for (i = l; i <= mid; i++) { NhoS7 y(
temp = data; fuD1U}c
} .Spi$>v
for (j = 1; j <= r - mid; j++) { QHzX 5$IM
temp[r - j + 1] = data[j + mid]; xbrmPGpW$
} {vT55i<mk
int a = temp[l]; abaQJ|
int b = temp[r]; DV[ Jbl:)
for (i = l, j = r, k = l; k <= r; k++) { @`;Y/',
if (a < b) { Pkx(M E
data[k] = temp[i++]; {,f!'i&b@
a = temp; :.S41S
} else { \+Rwm:lI
data[k] = temp[j--]; :gD0EqV
b = temp[j]; k<'vP{
} 8<-oJs_o+
} 5d?!<(e6
} JNFT6T)T15
TFC!u0Y"$
/** nG^M 2)(8
* @param data 2b4pOM7W
* @param l J7?)$,ij%
* @param i C*s0r;
*/ rF'^w56
private void insertSort(int[] data, int start, int len) { R'9@A\7#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %V%#y $l
} JQ@`EV9,
} 9<A\npD
} HcBH!0
} j,56Lh%1
pl#o!j(i
堆排序： ^wO_b'@v
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package org.rut.util.algorithm.support; Wl !!5\
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import org.rut.util.algorithm.SortUtil; ^?6 W<
{rb-DB-/5M
/** <Id1:
* @author treeroot F/h:&B:;
* @since 2006-2-2 XJJ[F|k~
* @version 1.0 V"7<[u]K|
*/ < R|)5/9
public class HeapSort implements SortUtil.Sort{ 7zg)h
2-6.r_
/* (non-Javadoc) /G)KkBC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7/&C;"
*/ y/@;c)1b9
public void sort(int[] data) { sw$R2K{y
MaxHeap h=new MaxHeap(); !k:zLjtp
h.init(data); @vdc)vN[/
for(int i=0;i h.remove(); UL)"
System.arraycopy(h.queue,1,data,0,data.length); b 5F4+
} 5xMA~I0c
V<HOSB7
private static class MaxHeap{ AU\xNF3
T3G/v)ufd
void init(int[] data){ j$|j8?
this.queue=new int[data.length+1]; 4aalhy<j
for(int i=0;i queue[++size]=data; Pe$^Mo.q
fixUp(size); !Bk[p/\
} IYfV~+P
} + 9\:$wMN
8Fd1;G6
private int size=0; N;C"X4rV
@Z9>3'2]A
private int[] queue; W(&Go'9e"
^I(oy.6?=p
public int get() { 3yHb!}F
return queue[1]; N"YK@)*Q
} n&0mz1rw
~{7zm"jN
public void remove() { {WYu0J@
SortUtil.swap(queue,1,size--); ;L G %s
fixDown(1); p|h.@do4
} `P^u:
file://fixdown &547`*
private void fixDown(int k) { BaWQ<T8p8
int j; 60hNCVq%
while ((j = k << 1) <= size) { Q? <-`7
if (j < size %26amp;%26amp; queue[j] j++; ?qf:_G
if (queue[k]>queue[j]) file://不用交换 =E [4H
break; 1P[I}GW#
SortUtil.swap(queue,j,k); DA+A >5/
k = j; ZL4l (&"
} n0+g]|a AF
} g[#k.CuP
private void fixUp(int k) { 'DCKD4@C/
while (k > 1) { ig{A[7qN
int j = k >> 1; iUeV5cB
if (queue[j]>queue[k]) qs6Nb'JvQR
break; C2+{U
SortUtil.swap(queue,j,k); ?(5o@Xq
k = j; U6c)"^\
} gt =j5
} XGE 2J
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} {E3xI2
Ne &Xf
} o,?!"*EP
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SortUtil： DAjG*K{
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package org.rut.util.algorithm; $R A4U<
tt+>8rxF:;
import org.rut.util.algorithm.support.BubbleSort; .abyYVrN4?
import org.rut.util.algorithm.support.HeapSort; cr76cYq"Q
import org.rut.util.algorithm.support.ImprovedMergeSort; dV5PhP>6
import org.rut.util.algorithm.support.ImprovedQuickSort; 'ox0o:
import org.rut.util.algorithm.support.InsertSort; [kPD`be2#
import org.rut.util.algorithm.support.MergeSort; QuSV&>T\
import org.rut.util.algorithm.support.QuickSort; &_"ORqn&
import org.rut.util.algorithm.support.SelectionSort; SX1X<9
import org.rut.util.algorithm.support.ShellSort; FX%t
zb"rMzCH
/** SQh+5
* @author treeroot :d;[DYFLxb
* @since 2006-2-2 69t7=r
* @version 1.0 ,9=gVW{
*/ J+{Ou rWt
public class SortUtil { 8K|J:[7
public final static int INSERT = 1; lbQ6 a
public final static int BUBBLE = 2; P7's8KOoS
public final static int SELECTION = 3; 1i4WWK7k
public final static int SHELL = 4; yJDeX1+,
public final static int QUICK = 5; /3Jz3
public final static int IMPROVED_QUICK = 6; f'1(y\_fb
public final static int MERGE = 7; c*N50%=4
public final static int IMPROVED_MERGE = 8; Iq)(UfaSve
public final static int HEAP = 9; ctp?y
rpUy$qrRc
public static void sort(int[] data) { mbF(tSy
sort(data, IMPROVED_QUICK); rei 8LW
} dX_!0E[c
private static String[] name={ Wt>J`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x|.v{tQa
}; fx<FIj7
sB?2*S"X)<
private static Sort[] impl=new Sort[]{ 8$\Za,)g
new InsertSort(), 6tOCZ'f
new BubbleSort(), ?Fce!J
new SelectionSort(), RTK}mhnV
new ShellSort(), inYM+o!Ub
new QuickSort(), i][f#e4
new ImprovedQuickSort(), ID)^vwn
new MergeSort(), gh TcB
new ImprovedMergeSort(), 8jRs=I
new HeapSort() DH:J
}; q<n[.u1@
},rav]
public static String toString(int algorithm){ e,EK,,iY5
return name[algorithm-1]; |)9thIQF
} !6M Bxg>
ar Q)%W
public static void sort(int[] data, int algorithm) { $50\"mo~z
impl[algorithm-1].sort(data); cC' ~
} /dLA`=rZx
$K})Q3FNi
public static interface Sort { E(_KN[}S
public void sort(int[] data); Q8;#_HE
} yk<VlS
^pj>9%
public static void swap(int[] data, int i, int j) { qB:AkMd&
int temp = data; tmp6hB
data = data[j]; bMsECA&
data[j] = temp; 8q0I:SJy
} ~F;CE"3A
} ?KCivf