[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; #IP<4"Hf
} W<3nF5!
int i1=l; -<i&`*zG
int i2=mid+1; @W^A%6"j
for(int cur=l;cur<=r;cur++){ 6;GL>))'
if(i1==mid+1) Oav^BhUO
data[cur]=temp[i2++]; %97IXrE
else if(i2>r) TUiXE~8=
data[cur]=temp[i1++]; :(Feg2c
else if(temp[i1] data[cur]=temp[i1++]; -C5Qh&~W
else SD6xi\8
data[cur]=temp[i2++]; CV4r31w
} vpUS(ztvs
} y?M99Vo4?
928szUo:
} @`?"#^jT
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改进后的归并排序: 81/Bn!
quU%9m \S`
package org.rut.util.algorithm.support; F#Oqa^$(
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import org.rut.util.algorithm.SortUtil; (CH F=g
5_nkN`x
/** b'^-$
* @author treeroot UPPDs"
* @since 2006-2-2 M,PZ|=V6a
* @version 1.0 BjJ$I^
*/ Fp06a!7<
public class ImprovedMergeSort implements SortUtil.Sort { >b |l6#%
yKa}U!$
private static final int THRESHOLD = 10; lBL;aTzo
^Yn{Vi2.
/* e4ajT
* (non-Javadoc) @B~/0 9
* LC\Ys\/,U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |9!3{3
*/ Vrf` :%
public void sort(int[] data) { d;(L@9HHD
int[] temp=new int[data.length]; Ni{(=&*=
mergeSort(data,temp,0,data.length-1); /H,!7!6>?
} j+J)S1
NQ{ XIN~
private void mergeSort(int[] data, int[] temp, int l, int r) { `96:Z-!}
int i, j, k; t4UKG&[a
int mid = (l + r) / 2; iR(A^
if (l == r) '\dFhYs{*
return; NJ7N*
if ((mid - l) >= THRESHOLD) ^gh/$my;
mergeSort(data, temp, l, mid); 2[Q*?N
else wI}5[m
insertSort(data, l, mid - l + 1); E'&UWDh
if ((r - mid) > THRESHOLD) 'e\m6~u\hm
mergeSort(data, temp, mid + 1, r); ZQnJTS+Rd
else o 1#XM/Z
insertSort(data, mid + 1, r - mid); sN7I~
_4rb7"b1
for (i = l; i <= mid; i++) { L;5jhVy
temp = data; co<){5zOT
} 7vcYI#(2 Y
for (j = 1; j <= r - mid; j++) { JHc|.2Oe
temp[r - j + 1] = data[j + mid]; /%rbXrR4w
} dt) BMF8
int a = temp[l]; -(qoz8H5
int b = temp[r]; b2H!{a"
for (i = l, j = r, k = l; k <= r; k++) { jfS?#;T)
if (a < b) { i,FG?\x@
data[k] = temp[i++]; _ts0@Z_:
a = temp; lyIstfRh15
} else { _$wWKJy9
data[k] = temp[j--]; i?'HVx
b = temp[j]; }!& w<wR
} /^#k/z
} E[t\LTt*n
} i,S%:0c7)
|VlAt#E
/** &.+[~2
* @param data M`KrB5a+6
* @param l ()(@Qcc
* @param i zY\v|l<T
*/ Q]w;o&eo
private void insertSort(int[] data, int start, int len) { fmA&1u/xMs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,^,Vq]$3
} ^;NM'Z
} 1B6Go
} +fAAkO*GP
} . %tc7`k8
u-pE ;|
堆排序： A86#7
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package org.rut.util.algorithm.support; u$&7fmZ
s:R>uGYOd
import org.rut.util.algorithm.SortUtil; :I F&W=?9
1 xiq]~H
/** =@binTC4
* @author treeroot EFf<|v
* @since 2006-2-2 k^]+I%?Q
* @version 1.0 Fmt5"3B
*/ _xAdvr' W
public class HeapSort implements SortUtil.Sort{ @p|[7'
l8GziM{lp
/* (non-Javadoc) \?GUGs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T!pWU*aB
*/ A]BG*
public void sort(int[] data) { . ~G>vVb
MaxHeap h=new MaxHeap(); Zj~tUCc
h.init(data); T {(6*^g<B
for(int i=0;i h.remove(); ?O\n!c
System.arraycopy(h.queue,1,data,0,data.length); 6VQ*z8wLw
} =35EG{W(
27t:-O
private static class MaxHeap{ z.]t_`KuF9
HG=!#-$9
void init(int[] data){ VV?+q)
this.queue=new int[data.length+1]; ;{q7rsE
for(int i=0;i queue[++size]=data; C n\'sb{
fixUp(size); KTBsH;6
} [ #A!B#`
} 6N~~:Gt
yXppu[=
private int size=0; ^%#v AS
OjE wJ$$
private int[] queue; /_x?PiL
+%?_1bGX>
public int get() { Bu>srX9f
return queue[1]; )f(#Fn
} -:a 9'dT
4rwfY<G
public void remove() { @ L%3}
SortUtil.swap(queue,1,size--); Cg}cD.
fixDown(1); 8cfxKUS
} uzho>p[ae
file://fixdown H`),PY2
private void fixDown(int k) { +X cB5S>
int j; q^([ & +
while ((j = k << 1) <= size) { l]T|QhiVd
if (j < size %26amp;%26amp; queue[j] j++; ZaH<\`=%
if (queue[k]>queue[j]) file://不用交换 qK.8^{b
break; jf*M}Q1jHE
SortUtil.swap(queue,j,k); zg)Z2?K|;u
k = j; t \DS}3pv
} JT[|l-\zo
} G0CmY43
private void fixUp(int k) { _s|C0Pt
while (k > 1) { *vCJTz
int j = k >> 1; E:&=A 4%
if (queue[j]>queue[k]) .FqbX5\p,
break; !wJ~p:vRdY
SortUtil.swap(queue,j,k); B6MMn.
k = j; N=zrY`Vd
} O6Xu/X]
} 4}W*,&_
#&1mc_`/
} ,D+pGxbr
g>/,},jv[x
} z1T.\mzfX
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SortUtil： Rl.3p<sX
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package org.rut.util.algorithm; Q;)[~p
'F5&f9A
import org.rut.util.algorithm.support.BubbleSort; 8nt:peJ$+
import org.rut.util.algorithm.support.HeapSort; #)GL%{Oa
import org.rut.util.algorithm.support.ImprovedMergeSort; -+Kx^V#'R
import org.rut.util.algorithm.support.ImprovedQuickSort; 8"N<g'Yl,
import org.rut.util.algorithm.support.InsertSort; F.c,FR2
import org.rut.util.algorithm.support.MergeSort; w%S\)wjS
import org.rut.util.algorithm.support.QuickSort; [,8@oM#
import org.rut.util.algorithm.support.SelectionSort; >y(;k|-$
import org.rut.util.algorithm.support.ShellSort; (pREo/T
< :<E~anH
/** 9Fv1D
* @author treeroot XBF#ILJ
* @since 2006-2-2 owmV7E1
* @version 1.0 |@sUN:G4k
*/ 2?z3s|+[
public class SortUtil { L'H'E,
public final static int INSERT = 1; 52C>f6w
public final static int BUBBLE = 2; `rbTB3?
public final static int SELECTION = 3; 7xO =:*
public final static int SHELL = 4; P"XF|*^U
public final static int QUICK = 5; QuT8(s1Q!
public final static int IMPROVED_QUICK = 6; % E3
public final static int MERGE = 7; (Z,v)TOXjV
public final static int IMPROVED_MERGE = 8; PUuxKW}
public final static int HEAP = 9; \WQ\q \
J)x-Yhe
public static void sort(int[] data) { 4~P{H/]
sort(data, IMPROVED_QUICK); A'c0zWV2
} ymrmvuh
private static String[] name={ #:3ca] k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =A$5~op%
}; /v U$62KA
]- ")r
private static Sort[] impl=new Sort[]{ !)?n n3
new InsertSort(), P5P:_hr
new BubbleSort(), l"W9uS;\T
new SelectionSort(), }/4 AT
new ShellSort(), 3PIZay
new QuickSort(), r.lH@}i%n
new ImprovedQuickSort(), p3&/F=T;)
new MergeSort(), `J'xVq#O
new ImprovedMergeSort(), *l)_&p
new HeapSort() ?S~HnIn
}; dPc*!xrq
%nSm 32/t3
public static String toString(int algorithm){ ;ug&v C
return name[algorithm-1]; T4]/w|?G
} Xx~OZ^t&Vn
hxP%m4xF +
public static void sort(int[] data, int algorithm) { 5k)QjZo
impl[algorithm-1].sort(data); a:r8Jzr
} f-F+Y`P
3=RVJb
public static interface Sort { =ps3=D
public void sort(int[] data); 9.{u2a\
} ({v$!AAv
^ |z|kc
public static void swap(int[] data, int i, int j) { O:IU|INq8
int temp = data; jV2L;APCq
data = data[j]; 6}6;%{p"Gu
data[j] = temp; Oh3AbpTT
} @%d g0F}h
} 'Ybd'|t{}