[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:poh[u
} :$tW9*\KY
int i1=l; G6,8Xwk
int i2=mid+1; i\Vpp8<B
for(int cur=l;cur<=r;cur++){ [>:gwl _\
if(i1==mid+1) ^~aSrREo
data[cur]=temp[i2++]; KCT8Q!\
else if(i2>r) IYO,/ kbf
data[cur]=temp[i1++]; L%0lX$2&\
else if(temp[i1] data[cur]=temp[i1++]; kwL)&@
else O9_YVE/-]
data[cur]=temp[i2++]; .'a|St
} Za6oYM_z
} gQEV;hCO
nKO&ffb'<
} >gZz`CH
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改进后的归并排序: zoJ;5a.3B
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package org.rut.util.algorithm.support; 6a?y$+pr
*o[%?$8T
import org.rut.util.algorithm.SortUtil; vxeT[/6i
N>R%0m<e
/** .vv*bx
* @author treeroot ;Kf|a}m-
* @since 2006-2-2 bIArAS9%
* @version 1.0 C6VoOT)\
*/ g5Dx9d{
public class ImprovedMergeSort implements SortUtil.Sort { $<cZ<g5)
g#4gGhI
private static final int THRESHOLD = 10; o x^lI
)sf~l6
/* 32iI :u
* (non-Javadoc) r?!xL\C\
* swlWe}1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tFaE cP
*/ >bN~p
public void sort(int[] data) { [kOA+\v
int[] temp=new int[data.length]; f~FehN7
mergeSort(data,temp,0,data.length-1); RfBb{?PP)
} qDM[7q3.
fmJWd|
private void mergeSort(int[] data, int[] temp, int l, int r) { ;g:bn5G
int i, j, k; 4Aew )
int mid = (l + r) / 2; i)L:VkN
if (l == r) U 0RfovJ
return; Pp_3 nyQ
if ((mid - l) >= THRESHOLD) r^t{Ii~
mergeSort(data, temp, l, mid); &fW=5'
else 9.zQ<k2
insertSort(data, l, mid - l + 1); ;p 5v3<PC
if ((r - mid) > THRESHOLD) LU,"i^T
mergeSort(data, temp, mid + 1, r); \Byk`} 9
else WKl'
insertSort(data, mid + 1, r - mid); 7J;~&x
5\0.[W{^
for (i = l; i <= mid; i++) { g&3#22z
temp = data; *+j{9LK
} p@Y$eZ:O
for (j = 1; j <= r - mid; j++) { I'9s=~VfY,
temp[r - j + 1] = data[j + mid]; Ig3(|{R
} RzRvu]]8
int a = temp[l]; 'ZH<g8:=@
int b = temp[r]; bmVgTm&
for (i = l, j = r, k = l; k <= r; k++) { |3:=qpT-
if (a < b) { :{s%=\k {d
data[k] = temp[i++]; lF8dRIav
a = temp; n [Xzo}
} else { A>t!/_"
data[k] = temp[j--]; ~}IvY?!;
b = temp[j]; L-C/Luws
} :aq>
} NhoS7 y(
} !)/iRw9re
Q^Z<RA(C
/** =x0"6gTz>
* @param data @=0r3
* @param l @`;Y/',
* @param i mu6xL QdA
*/ rrY{Jf9>
private void insertSort(int[] data, int start, int len) { aY[0A_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R_Gq8t$
} %wjB)Mae
} JNFT6T)T15
} "26B4*
} 6Sb'Otw.
]v@tZ}
堆排序： H@2v<e@
^[seK)S=
package org.rut.util.algorithm.support; 9<A\npD
7 xp1\j0
import org.rut.util.algorithm.SortUtil; 0"kE^=
PF'5z#] NP
/** _.OMjUBZT
* @author treeroot *)NR$9lGv
* @since 2006-2-2 1>@]@ST[:
* @version 1.0 YZBzv2'\x
*/ V^ fGRA
public class HeapSort implements SortUtil.Sort{ GIC"-l1\
}+dM1O
/* (non-Javadoc) V8nz-DL{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T`g?)/
*/ Pv7f _hw
public void sort(int[] data) { vzyNc'
MaxHeap h=new MaxHeap(); ^/%o%J&Hz
h.init(data); k,;lyE
for(int i=0;i h.remove(); {(M&-~Yh
System.arraycopy(h.queue,1,data,0,data.length); W>?f^C!+m
} &N/|(<CB
E?Qz/*'zv
private static class MaxHeap{ lTV@b&
+Q SxYV
void init(int[] data){ +H[}T ]
this.queue=new int[data.length+1]; ;/?Z<[B
for(int i=0;i queue[++size]=data; 3yHb!}F
fixUp(size); _'!N q
} 9<t9a f\.>
} Ei{(
#.E\,N'
private int size=0; BaWQ<T8p8
XlPK3^'N)h
private int[] queue; )g9)IF
:(bdI]
public int get() { !paN`Fz\a
return queue[1]; +,&m7L
} P9 {}&z%:
}zkL[qu;
public void remove() { f$1Gu
SortUtil.swap(queue,1,size--); WZ^{zFoZ
fixDown(1); Iz6ss(UJ
} !dfS|BA]
file://fixdown r/mA2
private void fixDown(int k) { {E3xI2
int j; Ci]'G>F@"
while ((j = k << 1) <= size) { ki;!WhF~
if (j < size %26amp;%26amp; queue[j] j++; /^++As0pY
if (queue[k]>queue[j]) file://不用交换 gHQPhe#n
break; z$9@j2
SortUtil.swap(queue,j,k); [NHg&R H
k = j; ]LEoOdDN"C
} FjD,8^SQW
} \@Ee9C13
private void fixUp(int k) { ^~ Ekg:`
while (k > 1) { Ef2Yl
int j = k >> 1; <\ y!3;
if (queue[j]>queue[k]) siZr@g!L
break; 8K|J:[7
SortUtil.swap(queue,j,k); `%$8cZ-kr
k = j; #,@bxsB
} ! G*&4V3Mg
} %9t{Z1$
L/Hv4={
} )D:9R)m
rei 8LW
} TNh=4xQ}
TG1P=g5h
SortUtil： K@q&HV"'.
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package org.rut.util.algorithm; rVUUH!
p`d XqW
import org.rut.util.algorithm.support.BubbleSort; gh TcB
import org.rut.util.algorithm.support.HeapSort; Y^QKp"
import org.rut.util.algorithm.support.ImprovedMergeSort; St6aYK
import org.rut.util.algorithm.support.ImprovedQuickSort; 8s<^]sFP
import org.rut.util.algorithm.support.InsertSort; 3FFaEl
import org.rut.util.algorithm.support.MergeSort; YnSbw3U.I
import org.rut.util.algorithm.support.QuickSort; :d.1;st
import org.rut.util.algorithm.support.SelectionSort; QS^~77q
import org.rut.util.algorithm.support.ShellSort; S"zk!2@C
{{32jU7<
/** b 8>q;
* @author treeroot Nu@5 kwH
* @since 2006-2-2 y`4{!CEyLW
* @version 1.0 J7:9_/e0T
*/ @@Q6TB
public class SortUtil { =ai2z2z
public final static int INSERT = 1; 69Nw/$
public final static int BUBBLE = 2; f27)v(EJ
public final static int SELECTION = 3; "qawq0P8Z
public final static int SHELL = 4; t)} \9^Uo
public final static int QUICK = 5; _5b0wdB
public final static int IMPROVED_QUICK = 6; X'f)7RbT
public final static int MERGE = 7; lkb2?2\+
public final static int IMPROVED_MERGE = 8; E tx`K5Tr]
public final static int HEAP = 9; 8.yCA
4@6<
public static void sort(int[] data) { m<{"}4'
sort(data, IMPROVED_QUICK); *hF^fxLbl
} G=|70pxU
private static String[] name={ !{(ls<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oSY7IIf%L
}; 96=Z"
:m Kxa
private static Sort[] impl=new Sort[]{ [/cIUQ
new InsertSort(), !"E-\cc'
new BubbleSort(), )t%h[0{{
new SelectionSort(), IE;\7r+h
new ShellSort(), e[{mVhg4E
new QuickSort(), hbI;Hd
new ImprovedQuickSort(), 1[-vD=
new MergeSort(), >F[GVmC
new ImprovedMergeSort(), PNpu*#Z`
new HeapSort() tuxRVV8l
}; Qdu$Os
^I`a;
public static String toString(int algorithm){ qSTWb%
return name[algorithm-1]; ;7Okyj6EP
} Nqcp1J"
@h}`DNaZ^
public static void sort(int[] data, int algorithm) { DnFjEP^
impl[algorithm-1].sort(data); ubbnFE&PD
} ORBxD"J&
I9&lO/c0
public static interface Sort { /e1(? 20
public void sort(int[] data); }pawIf4V
} ,Dp0fauJ
c)~h<=)
public static void swap(int[] data, int i, int j) { "IFgRaP=
int temp = data; eT[&L @l]b
data = data[j]; zvO:"w}
data[j] = temp; CU$#0f>
} %e?fH.)
} ?djQZ*