[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; @q)d
} 7%M_'P4 V
int i1=l; ckCE1e>s
int i2=mid+1; [4)F f
for(int cur=l;cur<=r;cur++){ `ERz\`d~Y;
if(i1==mid+1) tCt#%7J;a
data[cur]=temp[i2++]; abVmkdP_s
else if(i2>r) ?:0Jav
data[cur]=temp[i1++]; ~D>p0+-c
else if(temp[i1] data[cur]=temp[i1++]; $I?"lky
else p!%pP}I
data[cur]=temp[i2++]; y6BAH
} 9\(| D#
} Q7CsJzk~)
5z)~\;[ -
} X:{!n({r=
WcGS9`m/
改进后的归并排序: !&E-}}<
I>$&-i
package org.rut.util.algorithm.support; 8z\xrY
E]r?{t`]
import org.rut.util.algorithm.SortUtil; GQ ;;bcj&
wMN]~|z>
/** A=0'Ks
* @author treeroot BZ^}J!Q'*
* @since 2006-2-2 .=; ;
* @version 1.0 lp8v0e4
*/ fc>L K7M
public class ImprovedMergeSort implements SortUtil.Sort { A3*!"3nU
2X&qE}%k S
private static final int THRESHOLD = 10; |y!A&d=xYn
^LLzZnkcZ
/* xgtR6E^k
* (non-Javadoc) /Z4et'Lo
* HxI" 8A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TD_Oo-+\
*/ V(*(F7+
public void sort(int[] data) { /qw.p#
int[] temp=new int[data.length]; f%hEnZv
mergeSort(data,temp,0,data.length-1); =Fl^`*n
} u]@['7
NGWxN8P6
private void mergeSort(int[] data, int[] temp, int l, int r) { RG`1en
int i, j, k; .N(p=9
int mid = (l + r) / 2; |Q>IrT
if (l == r) *{{89E>wC
return; 9cm#56
if ((mid - l) >= THRESHOLD) T[j,UkgGo
mergeSort(data, temp, l, mid); &+R?_Ooibk
else Ga'swP=hf
insertSort(data, l, mid - l + 1); rVsJ`+L
if ((r - mid) > THRESHOLD) p()xz
mergeSort(data, temp, mid + 1, r); cN9t{.m
else n'w.; q
insertSort(data, mid + 1, r - mid); nFs(?Rv*
;A!BVq
for (i = l; i <= mid; i++) { OZ!^ak
temp = data; 7VI*N)OZ8
} {]|J5Dgfe
for (j = 1; j <= r - mid; j++) { -Y;3I00(
temp[r - j + 1] = data[j + mid]; ~e.L.,4QZ8
} G*v,GR
int a = temp[l]; WMg~Y"W
int b = temp[r]; Z EO WO
for (i = l, j = r, k = l; k <= r; k++) { 2GStN74Xr
if (a < b) { W*w3[_"sr
data[k] = temp[i++]; {FTqu.
a = temp; HUOj0T
} else { C{wEzM:
data[k] = temp[j--]; pY$Q
b = temp[j]; wH6aAV~1
} RzusNS
} ei5~&
} uRe'%?W
T9q-,w/j;
/** &YeA:i?
* @param data &]-DqK7
* @param l s(roJbJ_;
* @param i W|(1Y D
*/ 8e"gW >f
private void insertSort(int[] data, int start, int len) { Ld-_,-n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wn)W ?P;k
} <_KIK
} {cw /!B
} 5i{j' {_(8
} eQvg7aO;
rk)`\=No
堆排序： e64^ChCoV
##4HYQ%E
package org.rut.util.algorithm.support; N$:8,9.z
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import org.rut.util.algorithm.SortUtil; 8kDp_si
XHGFf_kW_N
/** 5.J.RE"M
* @author treeroot MR.'t9m2L
* @since 2006-2-2 _2 osV[e
* @version 1.0 ;mKb]
*/ ZWp(GC1NA
public class HeapSort implements SortUtil.Sort{ >~+ELVB&
8|58 H
/* (non-Javadoc) TrR8?-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n>U5R_T
*/ z,%$+)K
public void sort(int[] data) { @49S`
MaxHeap h=new MaxHeap(); VBcPu
h.init(data); .Rf_Cl
for(int i=0;i h.remove(); 1D!<'`)AY
System.arraycopy(h.queue,1,data,0,data.length); )IZ~G\Ra'
} 0NX,QD
x# 5A(g
private static class MaxHeap{ "i W"NFO
F`]2O:[
void init(int[] data){ ayF\nk4b
this.queue=new int[data.length+1]; /fV;^=:8c
for(int i=0;i queue[++size]=data; [Cv/{f3]u{
fixUp(size); OY@ %p}l
} 5bpEYW+
} >Wg hn:^
k~ /Nv=D
private int size=0; >`ZyG5
sZF6h=67D
private int[] queue; A1zjPG&]
Hc(OI|z~
public int get() { !0mI;~q|F
return queue[1]; ]-QA'Lq
} B~Xw[q
\d$!a5LF}
public void remove() { <B8!.|19
SortUtil.swap(queue,1,size--); 1c{DY
fixDown(1); OX\F~+
} 001FmiV
file://fixdown b(O3@Q6[
private void fixDown(int k) { p,i[W.dy.'
int j; _~iw[*#u
while ((j = k << 1) <= size) { [RTs[3E^
if (j < size %26amp;%26amp; queue[j] j++; P1' al
if (queue[k]>queue[j]) file://不用交换 3"KCh\\b
break; p|D/;Mk
SortUtil.swap(queue,j,k); < F+l
k = j; HEc+;O1<
} r#]WI|
} 54li^
private void fixUp(int k) { dT1H
while (k > 1) { ysf~|r4s
int j = k >> 1; +@iA;2&
if (queue[j]>queue[k]) ?R.j^S^
break; u.Tcg^v
SortUtil.swap(queue,j,k); .$)
k = j; G<rHkt@[
} ':m,)G5&
} a\YV3NJ/A
oJ|j#+Ft
} (|1A?@sJ#h
EV@X*| w
} uw+M
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SortUtil： % 0+j?>#X
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package org.rut.util.algorithm; FNY8tv*/x
AvV|(K"
import org.rut.util.algorithm.support.BubbleSort; R)ITy!z
import org.rut.util.algorithm.support.HeapSort; t+T4-1 3a
import org.rut.util.algorithm.support.ImprovedMergeSort; !Bq3Z?xA}
import org.rut.util.algorithm.support.ImprovedQuickSort; Ob`d
import org.rut.util.algorithm.support.InsertSort; DG ;_Vg
import org.rut.util.algorithm.support.MergeSort; G@jZ)2
import org.rut.util.algorithm.support.QuickSort; q6`b26
import org.rut.util.algorithm.support.SelectionSort; HqD^B[jS
import org.rut.util.algorithm.support.ShellSort; !sW(wAy?o
I5n^,@md
/** @wo(tf=@P
* @author treeroot c*L\_Vx+
* @since 2006-2-2 E+g@M8D
* @version 1.0 8MzVOF{"
*/ E`de7
public class SortUtil { T@&K-UQ
public final static int INSERT = 1; p &"`RS#Z
public final static int BUBBLE = 2; EZ$>.iy{
public final static int SELECTION = 3; B s#hr3h-
public final static int SHELL = 4; ``\i58K{e
public final static int QUICK = 5; Ne{?:h.!
public final static int IMPROVED_QUICK = 6; z Q`jP$2
public final static int MERGE = 7; r@t9Ci=}
public final static int IMPROVED_MERGE = 8; fc-iAj
public final static int HEAP = 9; J1sv[$9
?+W9az]+
public static void sort(int[] data) { {rH@gz|@i
sort(data, IMPROVED_QUICK); ';jYOVe
} O%!!w
private static String[] name={ RcM/!,B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EGzzHIZ`!
}; Y^7$t^&
Hmd] FC,_
private static Sort[] impl=new Sort[]{ fW3(&@
new InsertSort(), *@v)d[z_
new BubbleSort(), p~^D\jR.
new SelectionSort(), J|kR5'?x
new ShellSort(), nvJf/90$
new QuickSort(), &cHV7
new ImprovedQuickSort(), n%C>E.Tq
new MergeSort(), 8WbgSY`
new ImprovedMergeSort(), gVv>9W('
new HeapSort() )d1_Wm#B
}; B~JwHwIhA
v7jq@#-
public static String toString(int algorithm){ PQnF
return name[algorithm-1]; r(aLEJ"u?
} /F-qP.<D,r
UAFwi%@!-q
public static void sort(int[] data, int algorithm) { =/Mq5.
impl[algorithm-1].sort(data); 5eoska#y
} !QHFg-=7
EQ`(yj
public static interface Sort { c5l.B#-lY
public void sort(int[] data); KJ=6n%6
} ujaGNg?,
28H8l2{[>
public static void swap(int[] data, int i, int j) { V|/NB
int temp = data; *:t|qgJI#+
data = data[j]; XZJ+h,f
data[j] = temp; >.'*)@vQi
} ^m"u3b4
} H!nr^l'+