[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; )9? ^;HS
} C Ch38qBp
int i1=l; +VdC g_
int i2=mid+1; ^7$V>|
for(int cur=l;cur<=r;cur++){ EhK5<v}
if(i1==mid+1) i.Jk(%c
data[cur]=temp[i2++]; `vj"HhC
else if(i2>r) } D0Y8
data[cur]=temp[i1++]; <Q|(dFr`v
else if(temp[i1] data[cur]=temp[i1++]; 5Ff1x-lQ
else fqQ(EVpQ
data[cur]=temp[i2++]; &<\i37y
} V1!;Hvm]+
} z*BGaSX %
pG0Ca](
} !3T,{:gyrI
,~^BoH}
改进后的归并排序: t)h{ w"v
6}S1um4 F
package org.rut.util.algorithm.support; +!9&zYu!
jo^+
import org.rut.util.algorithm.SortUtil; }"o,j>IP
1KWGQJ%%s
/** UKfpoDhEe
* @author treeroot A<|]>[ax
* @since 2006-2-2 3IHA+Zz
* @version 1.0 l d@B
*/ ]5`Y^hS_g
public class ImprovedMergeSort implements SortUtil.Sort { <$ oI
( V^C7ix:
private static final int THRESHOLD = 10; b am*&E%0K
}!n90 9L
/* /\C5`>x
* (non-Javadoc) 4!^flKZQ
* oNK-^N?-T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T3#KuiwU9
*/ "{Jq6):mp
public void sort(int[] data) { (HD=m,}
int[] temp=new int[data.length]; )mvD2]fK
mergeSort(data,temp,0,data.length-1); c"x-_Uk
} 8 DE%ot
"2a&G3}t"
private void mergeSort(int[] data, int[] temp, int l, int r) { 2,.;Mdl
int i, j, k; e~iPN.'1
int mid = (l + r) / 2; #V:28[
if (l == r) QXg9ah~
return; >;M?f!
if ((mid - l) >= THRESHOLD) 9Vh>ty1|_
mergeSort(data, temp, l, mid); QGI_aU
else E,g5[s@
insertSort(data, l, mid - l + 1); jUg.Y98
if ((r - mid) > THRESHOLD) \$%q<_l
mergeSort(data, temp, mid + 1, r); u/g4s (a
else 6l|,J`G
insertSort(data, mid + 1, r - mid); ;&8
+K"8Q'&t
for (i = l; i <= mid; i++) { LA%t'n h
temp = data; i<uWLhgh1$
} SB}0u=5
for (j = 1; j <= r - mid; j++) { q{*4BL'
temp[r - j + 1] = data[j + mid]; +M %zOX/
} G"&yE.E5
int a = temp[l]; %\ef Mhn
int b = temp[r]; ghu8Eg,Y
for (i = l, j = r, k = l; k <= r; k++) { NP_b~e6O=
if (a < b) { =n73bm
data[k] = temp[i++]; etk@ j3#
a = temp; 0X'2d
} else { ;\[el<Y)s
data[k] = temp[j--]; '"QN{ja
b = temp[j]; XBF]|}%
} z0Bw+&^]}
} NL76 jF
} {u4=*>?G
s)<^YASg
/** m\O|BMHn
* @param data c2iPm9"eh
* @param l 3$Y(swc
* @param i ,j|9Bs
*/ JVx ,1lth
private void insertSort(int[] data, int start, int len) { uv$t>_^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mx:)&1
} B]-~hP
} )of?!>'S[
} tbr1mw'G
} E"{2R>mU~
eYD|`)-f<^
堆排序： WP b4L9<
K9 tuiD+j
package org.rut.util.algorithm.support; (ev(~Wc
alB[/.1
import org.rut.util.algorithm.SortUtil; vsU1Lzna6@
*#n?6KqZ
/** 4gRt^T-?
* @author treeroot RO10$1IW.2
* @since 2006-2-2 u_~*)w+mS@
* @version 1.0 (" ,(@nS
*/ Oi~]~+2
public class HeapSort implements SortUtil.Sort{ @C34^\aH+
^A"TY
/* (non-Javadoc) vUa&9Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5`?'}_[Yj
*/ Hve'Z,X
public void sort(int[] data) { i& ,Wg8#R
MaxHeap h=new MaxHeap(); F7r!zKXZ
h.init(data); 0M^v%22
for(int i=0;i h.remove(); xct{Tv[FO
System.arraycopy(h.queue,1,data,0,data.length); y:>'1"2`
} @! gJOy
Hi{1C"%
private static class MaxHeap{ | ]DJz
^3B&E^R
void init(int[] data){ 1dgy-$H~
this.queue=new int[data.length+1]; 6zfi\(fop
for(int i=0;i queue[++size]=data; )`sEdVxbr
fixUp(size); i{9_C/
} _3lci
} ,%zU5hh
nn0`A3
private int size=0; ygA~d9"
WHM|kt
private int[] queue; uN)o|7
6zGM[2
public int get() { K Qz.g3,
return queue[1]; 9Un3La8PX
} 86BY032H
2zz7/]?Q
public void remove() { tf5h/:
SortUtil.swap(queue,1,size--); {M.OOEcIp
fixDown(1); #J,?oe=<4
} N5SePA\ ,?
file://fixdown *C*'J7
private void fixDown(int k) { jM'kY|<g;
int j; c9c_7g'q-
while ((j = k << 1) <= size) { RzOs,
if (j < size %26amp;%26amp; queue[j] j++; S-$N!G~!
if (queue[k]>queue[j]) file://不用交换 :E>"z6H
break; HL^+:`,
SortUtil.swap(queue,j,k); v9<'nU WVR
k = j; 0E5"}8
} *88Q6=Mm
} aBN^J_
private void fixUp(int k) { :=iP_*#
while (k > 1) { 8?> #
int j = k >> 1; vl"l
if (queue[j]>queue[k]) \.`;p
break; Pr%Y!|
SortUtil.swap(queue,j,k); K9*vWoP'
k = j; ^4\hZ
} c8^M::NI
} yyj?hR@rZ
w4m)lQM
} <h*r
DLWG0$#!
} zv^km5by
DhVF^=x$
SortUtil： sr=~Uq{g
gNsas:iGM
package org.rut.util.algorithm; /mM#nS
o<Esh;;*nm
import org.rut.util.algorithm.support.BubbleSort; -Dx_:k|k
import org.rut.util.algorithm.support.HeapSort; \x,q(npHi
import org.rut.util.algorithm.support.ImprovedMergeSort; T;f`ND2fY
import org.rut.util.algorithm.support.ImprovedQuickSort; 94>EA/+Ek
import org.rut.util.algorithm.support.InsertSort; i1OF@~?
import org.rut.util.algorithm.support.MergeSort; E=-ed9({:
import org.rut.util.algorithm.support.QuickSort; cQ?eL,z
import org.rut.util.algorithm.support.SelectionSort; 7j ]d{lD
import org.rut.util.algorithm.support.ShellSort; +4N7 _Y
mip2=7M|C
/** $ e<108)]
* @author treeroot 6dCS Gb
* @since 2006-2-2 /3VSO"kcZ
* @version 1.0 mO6rj=L^
*/ CTG:C5OK
public class SortUtil { S^Lu RF]F
public final static int INSERT = 1; *Va;ra(V2
public final static int BUBBLE = 2; =Ts3O0"[
public final static int SELECTION = 3; xe~lV
public final static int SHELL = 4; *WHQ1geI8
public final static int QUICK = 5; V+A9.KoI
public final static int IMPROVED_QUICK = 6; G<2OL#Y-
public final static int MERGE = 7; S[2uez`
public final static int IMPROVED_MERGE = 8; g?e$B}%
public final static int HEAP = 9; &$1ifG
&^v5 x"
public static void sort(int[] data) { pn:) Rq0
sort(data, IMPROVED_QUICK); X{ZcJ8K
} ``zgw\f[%
private static String[] name={ #GJ{@C3H8Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z^ai *
}; b6mSPH@
>o]!-46
private static Sort[] impl=new Sort[]{ R 2{kS
new InsertSort(), 95wi~^^
new BubbleSort(), >{seaihK
new SelectionSort(), OzVCqq"]
new ShellSort(), H'Oy._,]t
new QuickSort(), )}/ ycTs
new ImprovedQuickSort(), EDl*UG83G
new MergeSort(), u["3| `C5
new ImprovedMergeSort(), %`M IGi#
new HeapSort() wNk 0F7Ck
}; 0gLl>tF[H
_i/x4,=xv
public static String toString(int algorithm){ (mNNTMe
return name[algorithm-1]; 0:CIM
} a7]wPXKq
nRE(RbRe
public static void sort(int[] data, int algorithm) { .qN|.:6a
impl[algorithm-1].sort(data); s9Tp(Yr,k
} ""; Bq*Y#
nmH1Wg*aW
public static interface Sort { sRMz[n5k
public void sort(int[] data); !T'`L{Sj
} +;T `uOF}
&}:]uC
public static void swap(int[] data, int i, int j) { ;*H@E(g
int temp = data; D?Mj<||
data = data[j]; hR g?H
data[j] = temp; T4M"s;::1
} ,w9:)B7
} j$<sq