[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; X)SUFhP\
} pW ~;B*hF
int i1=l; 8GxT!
int i2=mid+1; Oi?Q^ISxP
for(int cur=l;cur<=r;cur++){ 3R/6/+S-
if(i1==mid+1) ;7Qem&
data[cur]=temp[i2++]; xFUD9TM
else if(i2>r) u&p8S#e
data[cur]=temp[i1++]; Yy 4Was#
else if(temp[i1] data[cur]=temp[i1++]; "a(R>PV%
else ^Whc<>|
data[cur]=temp[i2++]; T2-x1Sw_
} 6iQqOAG
} 4oF,;o+v\4
5%S5*c6BD
} NZ`6iK-V_
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改进后的归并排序: w+rw<,u%
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package org.rut.util.algorithm.support; -6 v?iiZr
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import org.rut.util.algorithm.SortUtil; 6Hc25NuQZ
7# 'j>]
/** aJm5`az)
* @author treeroot RGV{KL
* @since 2006-2-2 N+SA$wG
* @version 1.0 P9\y~W
*/ Nt+UL/1]
public class ImprovedMergeSort implements SortUtil.Sort { A f?&VD4K
XF{2'x_R
private static final int THRESHOLD = 10; LzXIqj'H7T
9F,XjPK=
/* yMNOjs'c {
* (non-Javadoc) j+<!4 0#
* $.DD^ "9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RW>F %P
*/ m$Tt y[0
public void sort(int[] data) { 0T3r#zQ
int[] temp=new int[data.length]; >&<D.lx
mergeSort(data,temp,0,data.length-1); ,_,7cor
} 8Pom^QopK
tSDp>0yZ3
private void mergeSort(int[] data, int[] temp, int l, int r) { E3Z>R=s
int i, j, k; -NG9?sI\U
int mid = (l + r) / 2; =L$RY2S"
if (l == r) ^(xVjsHp#
return; 7.5\LTM>9e
if ((mid - l) >= THRESHOLD) 17Q* <iCs
mergeSort(data, temp, l, mid); W6B o\UK
else !/&~Feb
insertSort(data, l, mid - l + 1); tORDtMM9+
if ((r - mid) > THRESHOLD) GmGq69]J*
mergeSort(data, temp, mid + 1, r); h\-jqaq
else 0g#?'sD
insertSort(data, mid + 1, r - mid); :+DAzjwO<
:?%_JM5U
for (i = l; i <= mid; i++) { >fR#U"KPAB
temp = data; 9DXu*}
} ]:^kw$
for (j = 1; j <= r - mid; j++) { d@|j>Z
temp[r - j + 1] = data[j + mid]; '9wD+'c=A
} s|!b: Ms`
int a = temp[l]; .>zkS*oX4z
int b = temp[r]; U|h@Pw z
for (i = l, j = r, k = l; k <= r; k++) { CvTgtZ '
if (a < b) { \v_t: "
data[k] = temp[i++]; ,TO&KO1;&
a = temp; \;tKss!|
} else { !as<UH"\
data[k] = temp[j--]; ?yz}
b = temp[j]; NOmSLIgt7
} j1toV$)P
} 28+Sz>SP
} y+iuA@WCv
0H.B>:pv
/** kqAQrg]n
* @param data c9E9Rx
* @param l T{K+1SPy4
* @param i aEZn6k1
*/ p|%Y\!
private void insertSort(int[] data, int start, int len) { 7e#|=e *I!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {_MU0=7c\
} '*p-`
} cfe[6N
} =Jl1D*B*
} Pq7tNM E
TAJ9Y<
堆排序： Y=rW.yK8
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package org.rut.util.algorithm.support; `TsfscN
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import org.rut.util.algorithm.SortUtil; m~NWY$oI9[
Xhkw<XbV
/** yM D*>8/
* @author treeroot .y[K =p3
* @since 2006-2-2 Q}Vho.N@=
* @version 1.0 +Vf|YLbhJ
*/ S(-=I!.G{
public class HeapSort implements SortUtil.Sort{ U ._1'pW
s9GPDfZ
/* (non-Javadoc) TAC\2*bWje
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LP)mp cQ
*/ ptq{$Y{_
public void sort(int[] data) { u]MF r2
MaxHeap h=new MaxHeap(); G7/LYTT)
h.init(data); Z/RUrYeb
for(int i=0;i h.remove(); Tx_(^K
System.arraycopy(h.queue,1,data,0,data.length); Iq}h}Wd
} |~CnELF)
ng<`2XgU
private static class MaxHeap{ tw3d>H`
'IW+"o
void init(int[] data){ kWz%v
this.queue=new int[data.length+1]; rqh,BkQ0t
for(int i=0;i queue[++size]=data; QBn>@jq
fixUp(size); &{=~)>h
} 0j/81Y}p
} xNqQbkF
G =4y!y
private int size=0; B# H
IFTW,9hh
private int[] queue; YXg uw7%\
eB@i)w?@o
public int get() { =K>Z{%i
return queue[1]; I2DmM"-|
} aQmL=9
d=KOV;~);
public void remove() { *nW9)T
SortUtil.swap(queue,1,size--); 8k`zMT
fixDown(1); d,+n,;6Cf
} jb![ Lp
file://fixdown i }gxq
private void fixDown(int k) { jRkq^}
int j; K]Cvk%
while ((j = k << 1) <= size) { v(7A=/W_
if (j < size %26amp;%26amp; queue[j] j++; E6@;e-]j
if (queue[k]>queue[j]) file://不用交换 {n{}Y.
break; dGteYt_F
SortUtil.swap(queue,j,k); )|a9Z~#x
k = j; 9c7}-Go
} XZ&v3ul
} Yr=mLT|JN
private void fixUp(int k) { S7q&|nI
while (k > 1) { "qm>z@K
int j = k >> 1; mfN@tMp
if (queue[j]>queue[k]) bgK(l d`
break; rpT<cCem1
SortUtil.swap(queue,j,k); N]<gHGj}
k = j; `j<tI6[e
} ,;-*q}U
} |)-:w?
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} V6{xX0'b*m
=|%T E
} W7o/
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SortUtil： ,h._iO)I^
{LD8ie|x1`
package org.rut.util.algorithm; KTEis!w
VT7NWTJ,
import org.rut.util.algorithm.support.BubbleSort; "'#Hh&Us
import org.rut.util.algorithm.support.HeapSort; &Kp+8D*
import org.rut.util.algorithm.support.ImprovedMergeSort; U}0/V c26
import org.rut.util.algorithm.support.ImprovedQuickSort; a&hM:n4P
import org.rut.util.algorithm.support.InsertSort; z.^ )r
import org.rut.util.algorithm.support.MergeSort; T_Y}1n|7[
import org.rut.util.algorithm.support.QuickSort; {@$3bQ
import org.rut.util.algorithm.support.SelectionSort; //@=Q!MW
import org.rut.util.algorithm.support.ShellSort; m6cW
[AzN&yACE
/** fNJ;{&#
* @author treeroot %4Zy1{yKs_
* @since 2006-2-2 jf/9]`Hf
* @version 1.0 6I#DlAU@v
*/ $IT9@}*{
public class SortUtil { wcf_5T
public final static int INSERT = 1; ACYn87tq
public final static int BUBBLE = 2; ;alFK*K6
public final static int SELECTION = 3; bVHi3=0{
public final static int SHELL = 4; |pR$' HO
public final static int QUICK = 5; [;AcV73
public final static int IMPROVED_QUICK = 6; \AzcW;03g[
public final static int MERGE = 7; AyO|9!F@A
public final static int IMPROVED_MERGE = 8; _[o^23Hj
public final static int HEAP = 9; Ig KAD#2a
h,'+w
public static void sort(int[] data) { @EZONKT
sort(data, IMPROVED_QUICK); [9_ (+E[}
} W@dY:N}
private static String[] name={ UJ$:5*S=u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,P@-DDJ
}; *$C[![
yWtr,
private static Sort[] impl=new Sort[]{ u(Sz$eV
new InsertSort(), a?~csP^?}
new BubbleSort(), ONiI:Z>%
new SelectionSort(), 9lJj/
new ShellSort(), \=_q{
new QuickSort(), ^(*O$N*#
new ImprovedQuickSort(), )6 <byO
new MergeSort(), !cwVJe
new ImprovedMergeSort(), W? ||9
new HeapSort() S5KYZ W
}; _l=
](:FW '-
public static String toString(int algorithm){ Ef!p:HBJ
return name[algorithm-1]; gdE`UZ\
} ;S`-9}6
(x0*(*A}
public static void sort(int[] data, int algorithm) { yKEFne8^
impl[algorithm-1].sort(data); ,D2_Z]
} gCr|e}w-
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public static interface Sort { _C,@eu"9V
public void sort(int[] data); f\U&M,L\'
} @[lc0_b
s[@>uP
public static void swap(int[] data, int i, int j) { /&as)
int temp = data; kseJm+Hc
data = data[j]; YQdX>k
data[j] = temp; 6oh@$.ThG
} m<"fRT!Y
} RLOQ>vYY