[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; dPvRbwH<
} /zV&ebN]
int i1=l; 'ONCz
int i2=mid+1; p`N+9t&I4
for(int cur=l;cur<=r;cur++){ fXD9w1
if(i1==mid+1) `-yo-59E[
data[cur]=temp[i2++]; Fp=O:]
else if(i2>r) !79eF)
data[cur]=temp[i1++]; -9)H[}.
else if(temp[i1] data[cur]=temp[i1++]; :Q]P=-Y8
else $DS|jnpV
data[cur]=temp[i2++]; meJ%mY
} X3mHg5zt
} csK;GSp}
Qze.1h
} 3&`LVhx
fD:BKJQ
改进后的归并排序: L"[2[p
L/*D5k%J
package org.rut.util.algorithm.support; m!#'4
skeH~-`M@
import org.rut.util.algorithm.SortUtil; 9fQ[:Hl"
I.dS-)Y
/** {$AwG#kt
* @author treeroot @'IRh9
* @since 2006-2-2 5TynAiSD_>
* @version 1.0 1|bg;X9+
*/ rvEX;8TS
public class ImprovedMergeSort implements SortUtil.Sort { j{&*]QTN
dQ#$(<v[
private static final int THRESHOLD = 10; j;TXZ`|(
4 x|yzUx
/* (Y!{ UNq5
* (non-Javadoc) +YD_ L
* G1tua"Px
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4>R)2g
*/ RwyX,|
public void sort(int[] data) { ^L?2y/
int[] temp=new int[data.length]; Lqa|9|!
mergeSort(data,temp,0,data.length-1); &dsXK~9M>
} xwSi.~.
i(O+XQ}Fyx
private void mergeSort(int[] data, int[] temp, int l, int r) { nF1}?
int i, j, k; +Hd'*'c
int mid = (l + r) / 2; Ah:d2*SR4
if (l == r) [ikW3 '99,
return; 8.WZC1N
if ((mid - l) >= THRESHOLD) $ VTk0J-W
mergeSort(data, temp, l, mid); u;G-46
else 2QIx~Er
insertSort(data, l, mid - l + 1); Ci9]#)"c
if ((r - mid) > THRESHOLD) %n B}Hq ;
mergeSort(data, temp, mid + 1, r); hEhvA6f,
else <rI8O;\H
insertSort(data, mid + 1, r - mid); i K,^|Q8
]iezwz`'
for (i = l; i <= mid; i++) { \p.eY)>
temp = data; Gr&YzbSX
} bDtb"V8e
for (j = 1; j <= r - mid; j++) { %LjhK,'h
temp[r - j + 1] = data[j + mid]; \%/Y(YVm
} 2%_UOEayU
int a = temp[l]; ,z5B"o{Et
int b = temp[r]; LS%;ZKJ
for (i = l, j = r, k = l; k <= r; k++) { $97EeE:{M
if (a < b) { q=x1:^rVH
data[k] = temp[i++]; ^~`t q+
a = temp; CNM pyr
} else { =wquFA!c
data[k] = temp[j--]; Mwtd<7<!A
b = temp[j]; lvp8{]I<
} >Q#\X=a>
} zvOSQxGQ
} +'V ,z
HDHC9E6
/** Ihy76_OZ
* @param data \f4JIsZ-&
* @param l k#"}oI{< 6
* @param i :{=2ih-}
*/ \5DOp-2
private void insertSort(int[] data, int start, int len) { ovsI2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #`qP7E w
} \Xpq=2`
} @)x8<
} M0K+Vz=
} D` abVf
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堆排序： l*-$H$
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package org.rut.util.algorithm.support; ,M0#?j>
Oi4y~C_Xd
import org.rut.util.algorithm.SortUtil; m\eYm;RVj
snvixbN
/** t|]2\6acuc
* @author treeroot D:#e;K
* @since 2006-2-2 4fL/,j/^
* @version 1.0 }%Vx2Q
*/ Om5+j:YM
public class HeapSort implements SortUtil.Sort{ bCmlSu
nO;t5d
/* (non-Javadoc) l'FNp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J_N`D+m
*/ :>o2UH
public void sort(int[] data) { LWIPq"
MaxHeap h=new MaxHeap(); dPb@[k
h.init(data); (0!U,8zz
for(int i=0;i h.remove(); 859ID8F
System.arraycopy(h.queue,1,data,0,data.length); WmTg`[
} (4"Azo*~![
2>'/!/+R
private static class MaxHeap{ CAtdx!
IiB"F<&[j{
void init(int[] data){ g3kF&+2i
this.queue=new int[data.length+1]; J`[He$7)
for(int i=0;i queue[++size]=data; ]}A3Pm- t*
fixUp(size); p?Jx2(%m
} "2>_eZ#b
} BiI`oCX
{i|$^A3
private int size=0; a[A*9%a
H-'~c\)
private int[] queue; +?y9EZB%
gF8n{b
public int get() { Y4,LXuQ
return queue[1]; gvy c(d
} 3!2TE-
[fl^1!3{
public void remove() { b&xlT+GN
SortUtil.swap(queue,1,size--); (@ixV$Y
fixDown(1); IrTMZG
} m\;@~o'k
file://fixdown 2Pic4Z
private void fixDown(int k) { C ]+J
int j; [RFF&uy
while ((j = k << 1) <= size) { THf*<|
if (j < size %26amp;%26amp; queue[j] j++; 6U[bAp
if (queue[k]>queue[j]) file://不用交换 KQ2jeJ/pj
break; } 0x'm
SortUtil.swap(queue,j,k); nWb0S
k = j; cUK9EOPe
} q}MPl2
} mIm.+U`a2
private void fixUp(int k) { AD4Ot5
while (k > 1) { :8jaW?~
int j = k >> 1; E'wJ+X9 +
if (queue[j]>queue[k]) BZ"+ ND9m_
break; 2#t35fU
SortUtil.swap(queue,j,k); -1<*mbb0
k = j; LS{t7P9K
} 2SlOqH1
} $9Asr07
cr"AK"TQ
} t182&gpd`
@WfX{485
} ?R8wmE[w
NZ=`iA8)X
SortUtil： &(t/4)IZox
8e*1L:oB!
package org.rut.util.algorithm; uSU[Y,'x
/R!/)sg
import org.rut.util.algorithm.support.BubbleSort; ~.L\f%<
import org.rut.util.algorithm.support.HeapSort; UqEpeLK
import org.rut.util.algorithm.support.ImprovedMergeSort; F3pBk)>a\
import org.rut.util.algorithm.support.ImprovedQuickSort; 60@]^g;$I
import org.rut.util.algorithm.support.InsertSort; `/\Z{j0_
import org.rut.util.algorithm.support.MergeSort; QGM@m:O
import org.rut.util.algorithm.support.QuickSort; Qkq9oZ
import org.rut.util.algorithm.support.SelectionSort; Uf<hzP
import org.rut.util.algorithm.support.ShellSort; +?[,{WtV
#I] ^Wo
/** E"[h20`\/
* @author treeroot 'I8K1Q=/
* @since 2006-2-2 w] =q>p
* @version 1.0 5}"@$.{i
*/ Z[pMlg6Z
public class SortUtil { oP 4z>
public final static int INSERT = 1; =vc8u&L2
public final static int BUBBLE = 2; j!;y!g
public final static int SELECTION = 3; = gbB)u-Pc
public final static int SHELL = 4; .,$<waGD
public final static int QUICK = 5; ZD(VH6<g%
public final static int IMPROVED_QUICK = 6; QO&{Jx.^[
public final static int MERGE = 7; =]swhF+l-
public final static int IMPROVED_MERGE = 8; , A@uSfC(
public final static int HEAP = 9; ]QbT%0
R5KOai!
public static void sort(int[] data) { "xK#%eJjWd
sort(data, IMPROVED_QUICK); jr`;H
} (O@fgBM
private static String[] name={ 7kDqgod^A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1](PuQm7+
}; )A1u uW (
??u*qO:p
private static Sort[] impl=new Sort[]{ Wp2$L-T&$
new InsertSort(), _<LJQ
new BubbleSort(), ;rqW?':(i
new SelectionSort(), 9(AY7]6
new ShellSort(), `Hp=1a
new QuickSort(), gmW-#.
new ImprovedQuickSort(), )kpNg:2p
new MergeSort(), s'4%ZE2Dr
new ImprovedMergeSort(), Zk:_Yiki&
new HeapSort() hC D6
}; KKcajN
4Y8=
public static String toString(int algorithm){ f'oTN!5WF
return name[algorithm-1]; ?>;aD
} #c:s2EL
l zFiZx
public static void sort(int[] data, int algorithm) { AkQ(V
impl[algorithm-1].sort(data); dHDtY$/_
} .V hU:_u
:^]Po$fl
public static interface Sort { v#?DWeaFS_
public void sort(int[] data); p& _Z}Wv
} k*C69
ZWCsrV*;
public static void swap(int[] data, int i, int j) { Fqeqn[,
int temp = data; *|y'%y
data = data[j]; zIF1A*UH
data[j] = temp; hoFgs9
} gX{j$]^6G8
} +S~ u,=