[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; , P1m#
} fP;I{AiN~
int i1=l; 0ly6 |:
int i2=mid+1; gpbdK?
for(int cur=l;cur<=r;cur++){ MD0d
if(i1==mid+1) FAGi`X<L
data[cur]=temp[i2++]; &"1_n]JO
else if(i2>r) ls "Z4v(L6
data[cur]=temp[i1++]; iF:NDqc
else if(temp[i1] data[cur]=temp[i1++]; frQ=BV5%6
else EN>a^B+!
data[cur]=temp[i2++]; -G1R><8[
} Uu`}| &@i
} !}eq~3
M.$=tuUL
} o9{1_7K
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改进后的归并排序: |c$*Fa"A
#5{lOeN
package org.rut.util.algorithm.support; Q\^BOdX^`
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import org.rut.util.algorithm.SortUtil; wqE2n
=xH>,-8}
/** zyK11
* @author treeroot tQMz1$
* @since 2006-2-2 A,#z_2~
* @version 1.0 dDYor-g>
*/ sWq}/!@&
public class ImprovedMergeSort implements SortUtil.Sort { -|czhO)R
3=Xvl 58k
private static final int THRESHOLD = 10; xnZ
;$r!eFY;
/* Nw1 .x
* (non-Javadoc) U|+`Eth8(
* ccW{88II7w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #\}xyPS
*/ p2GN93,u@P
public void sort(int[] data) { q~\[P4m
int[] temp=new int[data.length]; p|r>tBv?x
mergeSort(data,temp,0,data.length-1); qm=9!jqC;
} )qWO}]F
4tt=u]:
private void mergeSort(int[] data, int[] temp, int l, int r) { 4 $)}d
int i, j, k; 1x0)mt3
int mid = (l + r) / 2; &3~R-$P
if (l == r) TU2MG VYy
return; Pi[(xD8
if ((mid - l) >= THRESHOLD) ~c=*Y=)LG
mergeSort(data, temp, l, mid); bOlb
else XOZ@ek)LY
insertSort(data, l, mid - l + 1); \7(OFT\u:
if ((r - mid) > THRESHOLD) tgrZs8?
mergeSort(data, temp, mid + 1, r); !6+V
else /jU4mPb;\D
insertSort(data, mid + 1, r - mid); - :x6X$=
Pv$O=N6-
for (i = l; i <= mid; i++) { ;4vx+>-
temp = data; ?l 0WuU
} Nu; 9
for (j = 1; j <= r - mid; j++) { Z3 na.>Z
temp[r - j + 1] = data[j + mid]; erV&N,cI
} aXD|XE%
int a = temp[l]; fqm6Pd{:(
int b = temp[r]; `7 J4h9K
for (i = l, j = r, k = l; k <= r; k++) { I"jub kI=Z
if (a < b) { WODgG@w
data[k] = temp[i++]; VBu6,6
a = temp; 0mT.J~}1v
} else { qUNXT
data[k] = temp[j--]; p#dYNed]'
b = temp[j]; 04E#d.o'
} e0o)Jo.P
} OFlY"OS[
} &Mh]s\
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/** _4t
* @param data k'd=|U;(FV
* @param l T!H }^v
* @param i 4V5h1/JPm
*/ Nu%MXu+
private void insertSort(int[] data, int start, int len) { 5lm>~J!/^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qP[jtRIN
} L8KMMYh[
} ){i 9,u")
} u+]8Sq
} s !HOrhV
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堆排序： DIc -"5~
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package org.rut.util.algorithm.support; ^pvnUODW[
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import org.rut.util.algorithm.SortUtil; ?w"zW6U
Mg{=(No
/** }$'T=ay&
* @author treeroot h\OMWJ~
* @since 2006-2-2 @w[HXb
* @version 1.0 bjs{_?
*/ V)Y#m/$`
public class HeapSort implements SortUtil.Sort{ )m(?U
R-Z)0S'ZR
/* (non-Javadoc) $)M5@KT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7brC@+ZD
*/ RZ:=';
public void sort(int[] data) { P?YcZAJT*
MaxHeap h=new MaxHeap(); -xU4s
h.init(data); nTPq|=C
for(int i=0;i h.remove(); ywbdV-t/
System.arraycopy(h.queue,1,data,0,data.length); 5+iXOs<
} UJQGwTA W
;XGO@*V5T
private static class MaxHeap{ lyyRyFfQ
)Es|EPCx!
void init(int[] data){ sxU 0Fg
this.queue=new int[data.length+1]; XXPpj< c
for(int i=0;i queue[++size]=data; V3>JZH`
fixUp(size); 5*Y(%I<
} ,CQg6-[
} -|&&lxrwh
hxuc4C\J
private int size=0; :pgpE0
&qae+p?
private int[] queue; rIWQD%Afm
m3 W
public int get() { 5'[b:YC
return queue[1]; #qdfr3
} CR'1,
c\(CbC
public void remove() { &X OFc.u
SortUtil.swap(queue,1,size--); {3*Zx"e![
fixDown(1); >du|DZq
} @ M
file://fixdown Y`!Zk$8
private void fixDown(int k) { 5TS&NefM
int j; W 33MYw
while ((j = k << 1) <= size) { #w#:f
if (j < size %26amp;%26amp; queue[j] j++; _tQR3I5
if (queue[k]>queue[j]) file://不用交换 ?=0BU}
break; WBY_%RTx
SortUtil.swap(queue,j,k); @PyZ u7'
k = j; BBlYy5x
} ^;a~_9 m-
} 2"!s8x1$
private void fixUp(int k) { K)F6TvWv
while (k > 1) { RD0=\!w*5
int j = k >> 1; 8(""ui8
if (queue[j]>queue[k]) pt=H?{06
break; ]}0QrD
SortUtil.swap(queue,j,k); 4S3uzy%
k = j; )V?:qCuY>
} N)^` 15w
} {E$smX
6k*,Yei
} Ni-@El99
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} swLrp 74
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SortUtil： S!+}\*
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package org.rut.util.algorithm; x /E<@?*:
Av_JcH
import org.rut.util.algorithm.support.BubbleSort; g!DJW
import org.rut.util.algorithm.support.HeapSort; YzVhNJWpw
import org.rut.util.algorithm.support.ImprovedMergeSort; ![j?/376
import org.rut.util.algorithm.support.ImprovedQuickSort; IcP\#zhEv
import org.rut.util.algorithm.support.InsertSort; &*8_w-
import org.rut.util.algorithm.support.MergeSort; 6#(==}Sm+
import org.rut.util.algorithm.support.QuickSort; 5l4YYwd>v
import org.rut.util.algorithm.support.SelectionSort; jPa"|9A
import org.rut.util.algorithm.support.ShellSort; V3<H8pL
CWw#0
/** b ]u01T-
* @author treeroot %+HZ4M+hV
* @since 2006-2-2 yU'<b.]
* @version 1.0 T?HW=v_a
*/ }YCpd)@
public class SortUtil { 0<#>LWaM_
public final static int INSERT = 1; GYwU3`{
public final static int BUBBLE = 2; jcL%_of
public final static int SELECTION = 3; aK33bn'j
public final static int SHELL = 4; a(oa?OdJ
public final static int QUICK = 5; u4vyj#V
public final static int IMPROVED_QUICK = 6; uJ T^=Y
public final static int MERGE = 7; T1#r>3c\
public final static int IMPROVED_MERGE = 8; :kQydCuK
public final static int HEAP = 9; Bvsxn5z+:
_T\cJcWf
public static void sort(int[] data) { lgQ"K(zY
sort(data, IMPROVED_QUICK); chA7R'+LA
} Xli$4 uL
private static String[] name={ a|eHo%Qt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]+A%37
}; Wmc@: (n
p(Ux]_s%
private static Sort[] impl=new Sort[]{ \45F;f_r6
new InsertSort(), zv0bE?W9
new BubbleSort(), 1s/548wu
new SelectionSort(), 6W[~@~D=
new ShellSort(), g0ks[ }f-
new QuickSort(), wl7 (|\-
new ImprovedQuickSort(), ApNS0
new MergeSort(), 3t9Weo)
new ImprovedMergeSort(), <\EJ:
new HeapSort() ! G3Gr
}; YJu~iQ`i
{;vLM* '
public static String toString(int algorithm){ 03H0(ku=
return name[algorithm-1]; y4)iL?!J~
} M>[e1y>7
z"P/Geb:O
public static void sort(int[] data, int algorithm) { `3yK<-
impl[algorithm-1].sort(data); Z@,[a
} d$hBgJe>N
%y_{?|+
public static interface Sort { TyhO+;
public void sort(int[] data); GRh430V[
} |p.|zH
H)+QkQb}
public static void swap(int[] data, int i, int j) { w)C5XX30;
int temp = data; S#:l17e3
data = data[j]; N@0cn q:"
data[j] = temp; ny1;]_X_
} pZz\o
} [ylRq7^e