[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; 27E6S)zv
} p2!x8`IB*
int i1=l; -deY,%
int i2=mid+1; -d%bc?
for(int cur=l;cur<=r;cur++){ H<%7aOwO2
if(i1==mid+1) 0[T!}F^%e
data[cur]=temp[i2++]; FD#?pVyPn^
else if(i2>r) CTR|b}!
data[cur]=temp[i1++]; Zx55mSfx:
else if(temp[i1] data[cur]=temp[i1++]; 8S@ ~^D
else @+Berb
data[cur]=temp[i2++]; Otn,(j;u
} k^]+I%?Q
} Fmt5"3B
\@['V
} @p|[7'
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改进后的归并排序: \?GUGs
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package org.rut.util.algorithm.support; A]BG*
. ~G>vVb
import org.rut.util.algorithm.SortUtil; Zj~tUCc
T {(6*^g<B
/** ?O\n!c
* @author treeroot 6VQ*z8wLw
* @since 2006-2-2 =35EG{W(
* @version 1.0 #TZYe4#f
*/ 8_Y{7;<ey
public class ImprovedMergeSort implements SortUtil.Sort { {TzKHnP
]J;^< 4l
private static final int THRESHOLD = 10; X LA
[ #A!B#`
/* _9#4
* (non-Javadoc) ^%#v AS
* :8E(pq|1PB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kd|@.
*/ ~Rk6@&ZS}
public void sort(int[] data) { &{x5 |$SD
int[] temp=new int[data.length]; #?!)-Q%
mergeSort(data,temp,0,data.length-1); n|SsV
} @w,-T@nAW
( y2%G=.j
private void mergeSort(int[] data, int[] temp, int l, int r) { WSi Utf|g
int i, j, k; 9!_`HE+(XJ
int mid = (l + r) / 2; kIrME:
if (l == r) ut& RKr3
return; +S^Uw'L$=T
if ((mid - l) >= THRESHOLD) a`q">T%q
mergeSort(data, temp, l, mid); cEve70MV
else h+,zfVJu
insertSort(data, l, mid - l + 1); 2B=yT8
if ((r - mid) > THRESHOLD) [% |i
mergeSort(data, temp, mid + 1, r); lmj73OB3
else 7AV!v`
insertSort(data, mid + 1, r - mid); IA$:r@QNx8
R\A5f\L9
for (i = l; i <= mid; i++) { iW-w?!>|m
temp = data; 2[r#y1ro
} k U*\Fa*E
for (j = 1; j <= r - mid; j++) { asj^K|.z
temp[r - j + 1] = data[j + mid]; -?2ThvT
} ~-A5h(
int a = temp[l]; yGZb
int b = temp[r]; y*vs}G'W
for (i = l, j = r, k = l; k <= r; k++) { &=<x&4H+
if (a < b) { 5mnIQ~psR
data[k] = temp[i++]; SEIGs_^'\
a = temp; Q;)[~p
} else { 'F5&f9A
data[k] = temp[j--]; 8nt:peJ$+
b = temp[j]; #)GL%{Oa
} -+Kx^V#'R
} 8"N<g'Yl,
} F.c,FR2
#J)sz,)(
/** \a<qI
* @param data ~>k<I:BtrT
* @param l jXSo{
* @param i (O\5gAx
*/ zy
private void insertSort(int[] data, int start, int len) { $FNj>1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8}XtVF;
} A=I]1r
} }_@*,
} 9=ns.r
} U;`N:~|p#
P"XF|*^U
堆排序： :JV=Kt
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package org.rut.util.algorithm.support; rt_%_f>qd
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import org.rut.util.algorithm.SortUtil; !X` 5
SBzJQt@Hs
/** W[AX?
* @author treeroot 8jMw7ti
* @since 2006-2-2 d2Z5HFtY
* @version 1.0 Y]Vt&*{JV
*/ UP58Cln*
public class HeapSort implements SortUtil.Sort{ !0zbWB9
/$|C s
/* (non-Javadoc) =$X5O&E3'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lr=? &>MXj
*/ VY<$~9a&1
public void sort(int[] data) { x{*g^f
MaxHeap h=new MaxHeap(); kl?U2A.=
h.init(data); 4`I2tr
for(int i=0;i h.remove(); %\6|fKB4<
System.arraycopy(h.queue,1,data,0,data.length); ?w#V<3=
} ^vn8s~#
yS[:C 2v
private static class MaxHeap{ 0BMKwZg
sX.L
void init(int[] data){ EeIV6ug
this.queue=new int[data.length+1]; )D{L<.i_
for(int i=0;i queue[++size]=data; 6NPCp/
fixUp(size); ^HgQ"dD <
} jV2L;APCq
} 6}6;%{p"Gu
Oh3AbpTT
private int size=0; @%d g0F}h
'Ybd'|t{}
private int[] queue; t3|If@T
k@L},Td
public int get() { /BjM&v(5/
return queue[1]; 12`q9Io"
} 'W(+rTFf!
_PLY<i2vr
public void remove() { V7[6jWgH
SortUtil.swap(queue,1,size--); 9utiev~3
fixDown(1); ![h+R@_(
} Y,w'Op
file://fixdown ##+|zka!U
private void fixDown(int k) { ELfcZfJ
int j; tJ>%Xop
while ((j = k << 1) <= size) { N:?UA
if (j < size %26amp;%26amp; queue[j] j++; GvSSi'q~B
if (queue[k]>queue[j]) file://不用交换 <o@&I " o
break; S96H`kedZo
SortUtil.swap(queue,j,k); M<s16
k = j; a"SH_+T{
} 2~dUnskyy
} {; #u~e(W
private void fixUp(int k) { H=Scrvfx
while (k > 1) { }{T9`^V:h
int j = k >> 1; %sxLxx_x!
if (queue[j]>queue[k]) 7r;7'X5
break; Jmrs@
SortUtil.swap(queue,j,k); nr7#}pzo
k = j; ^0)Mc"&{
} PP)iw@9j
} RfH.WXi
~QgyhJM_h=
} TRP#b 7nC
q.0Evr:
} !~Vo'ykwx'
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SortUtil： > %h7)}U
8=QOp[w
package org.rut.util.algorithm; 701a%Jq_2
P 4Vi~zMX
import org.rut.util.algorithm.support.BubbleSort; KZy2c6XO;
import org.rut.util.algorithm.support.HeapSort; Y-!~x0-H
import org.rut.util.algorithm.support.ImprovedMergeSort; gZA[Sq
import org.rut.util.algorithm.support.ImprovedQuickSort; NwAvxN<R(f
import org.rut.util.algorithm.support.InsertSort; Dl=9<:6FW
import org.rut.util.algorithm.support.MergeSort; 8(-V pU
import org.rut.util.algorithm.support.QuickSort; #&zM.O1Q
import org.rut.util.algorithm.support.SelectionSort; b-?wJSf|
import org.rut.util.algorithm.support.ShellSort; H<_BnT#
kw)("SQ
/** bfo..f-0/Y
* @author treeroot #b~B 0:U
* @since 2006-2-2 -55[3=#
* @version 1.0 Lx%*IE|c
*/ #1Zqq([@
public class SortUtil { T_t5Tg~i[N
public final static int INSERT = 1; aQ!QrTua-
public final static int BUBBLE = 2; 7LEB,bU
public final static int SELECTION = 3; D5Zgi!
public final static int SHELL = 4; 1oKF-";u(
public final static int QUICK = 5; #(@!:f1
public final static int IMPROVED_QUICK = 6; z$g cK>@l
public final static int MERGE = 7; y;Ez|MS
public final static int IMPROVED_MERGE = 8; @*?)S{8
public final static int HEAP = 9; /my5s\;s|z
,+w9_Gy2H
public static void sort(int[] data) { -e_91WI
sort(data, IMPROVED_QUICK); *Bfo"["0.
} \c')9g@
private static String[] name={ `iHyGfm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @JW HG1qJ
}; %G0J]QY{(x
NS<C"O
private static Sort[] impl=new Sort[]{ :1*q}R
new InsertSort(), vEy0DHEE
new BubbleSort(), sNaLz
new SelectionSort(), ^bM\:z"M
new ShellSort(), m^k$Z0
new QuickSort(), V}3'0
new ImprovedQuickSort(), v~8CpC
new MergeSort(), 8F>u6Y[P
new ImprovedMergeSort(), |>^5G@e
new HeapSort() yv[3&E?
}; ]& 8c 45c
~];r{IU
public static String toString(int algorithm){ [}Q_T.4)E
return name[algorithm-1]; p9>{X\eT:
} ^fiJxU
GLO%>&
public static void sort(int[] data, int algorithm) { y+\kZIqX
impl[algorithm-1].sort(data); ]z5kYU&
} qt(+X
Z8Iqgz7|y
public static interface Sort { ?"F9~vx&G
public void sort(int[] data); ol0i^d*9F
} ^ps6\>=0cW
&Fiesi!tET
public static void swap(int[] data, int i, int j) { W [*Go
int temp = data; Ln'y 3~@
data = data[j]; ,.kJF4s&
data[j] = temp; U[0x\~[$K
} HVJqDF
} c"O4=[N: ;