[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; - }7e:!.
} ej4W{IN~:
int i1=l; {QHVo#
int i2=mid+1; 5p<ItU$pnL
for(int cur=l;cur<=r;cur++){ qq) rd
if(i1==mid+1) I/d&G#:~
data[cur]=temp[i2++]; x }\64
else if(i2>r) k7?N ?7w
data[cur]=temp[i1++]; }.3nthgz
else if(temp[i1] data[cur]=temp[i1++]; ^?cz,N~
else lE;Ewg
data[cur]=temp[i2++]; k9 "[H'
} uD1e!oU
} cik!GA
"!Uqcay-
} x(hE3S#+
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改进后的归并排序: iVp,e
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package org.rut.util.algorithm.support; 6-yd]("
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import org.rut.util.algorithm.SortUtil; U1DXeh~V
lD^]\;?
/** ROg(U8 N
* @author treeroot 0fb`08,^
* @since 2006-2-2 ?u/@PR\D
* @version 1.0 pP*zq"o
*/ dx;Ysn0-
public class ImprovedMergeSort implements SortUtil.Sort { o.w\l\
_hRcc"MS`
private static final int THRESHOLD = 10; f!oT65Vmi
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/* [`{Z}q&
* (non-Javadoc) SSz~YR^}Sr
* bvv|;6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xC*6vH]?
*/ ),UX4%K=
public void sort(int[] data) { Gb8D[1=u=
int[] temp=new int[data.length]; ,4zmb`dP<
mergeSort(data,temp,0,data.length-1); mQCeo}7N5
} WFO4gB*
Y? x,
private void mergeSort(int[] data, int[] temp, int l, int r) { xIxn"^'
int i, j, k; sm0xLZ
int mid = (l + r) / 2; 5b!vgm#])
if (l == r) |zQ4u
return; P;P%n
if ((mid - l) >= THRESHOLD) g .onTFwN
mergeSort(data, temp, l, mid); lJu;O/
else J?RabYd ~
insertSort(data, l, mid - l + 1); KNS.Nw7
if ((r - mid) > THRESHOLD) jX3,c%aQ5e
mergeSort(data, temp, mid + 1, r); *of3:w
else JRSSn]pw
insertSort(data, mid + 1, r - mid); +?u~APjNN
q#vQv5
for (i = l; i <= mid; i++) { RA KFU
temp = data; d]:I(9K
} w8kOVN2b
for (j = 1; j <= r - mid; j++) { ]$Yvj!K*Q
temp[r - j + 1] = data[j + mid]; Fs{x(_LOr
} q;<h[b?
int a = temp[l]; _CW(PsfY
int b = temp[r]; :uWw8`
for (i = l, j = r, k = l; k <= r; k++) { v}1QH
if (a < b) { \^ZlG.
data[k] = temp[i++]; P%{^i]
a = temp; 1QLbf*zeIW
} else { |+iws8xK?
data[k] = temp[j--]; GliwY_
b = temp[j]; k.uMp<)D
} zaah^.MA|
} MYla OT
} 5]n[]FW
V}dJ.I /#
/** FrTi+& <
* @param data AWP"b?^G|
* @param l k`0>36
* @param i A%`[mc]4#
*/ ep2k%?CX 1
private void insertSort(int[] data, int start, int len) { G'6@+$ppS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o$w_Es]Ma
} Z&|Kki*
} :?/cPg'D
} 8-BflejX
} gW-V=LV (
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堆排序： a"FCZ.O1
BReJ!|{m}
package org.rut.util.algorithm.support; =&,]Z6{>
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import org.rut.util.algorithm.SortUtil; kuol rfGB
;?8_G%va
/** tS|(K=$
* @author treeroot fjU8gV
* @since 2006-2-2 ,=Mt`aN
* @version 1.0 |QU <e
*/ } \XfH
public class HeapSort implements SortUtil.Sort{ `}mcEl
K Pt5=a
/* (non-Javadoc) byTh/H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Olh<,p+x
*/ i(iXD
public void sort(int[] data) { "f "6]y
MaxHeap h=new MaxHeap(); o| #Qu8Lk
h.init(data); c )G3k/T5
for(int i=0;i h.remove(); 4WJ.^(
System.arraycopy(h.queue,1,data,0,data.length); qMLD)rL
} dR"@`
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private static class MaxHeap{ '=Rs/EDME
z"0I>gl
void init(int[] data){ 8Le||)y,\
this.queue=new int[data.length+1]; (>r[-Bft
for(int i=0;i queue[++size]=data; <-[wd.M_
fixUp(size); pov)Z):}G<
} gLy&esJl1
} m06ALD_
{buo^kgj`]
private int size=0; B)qWtMZx
k&,~qoU
private int[] queue; M7@2^G]p
^R# E:3e
public int get() { I~ok4L?VB
return queue[1]; 3+@<lVew6
} tD+9kf2
=zKhz8B(
public void remove() { ApAO/q
SortUtil.swap(queue,1,size--); :E:38q,hG
fixDown(1); 1`a5C.v
} C!fMW+C@
file://fixdown BFo5\l:q8
private void fixDown(int k) { LUqB&,a}
int j; [[;e)SoA
while ((j = k << 1) <= size) { 6f\Lf?vF
if (j < size %26amp;%26amp; queue[j] j++; 0a}u;gt,4w
if (queue[k]>queue[j]) file://不用交换 jpO7'ivG
break; BK,{N0
SortUtil.swap(queue,j,k); =5kY6%E7c
k = j; Mz~M3$$9n
} OoA|8!CFa
} aFS,GiB
private void fixUp(int k) { )XYv}U
while (k > 1) { fSs4ZXC
int j = k >> 1; yF"1#{*y
if (queue[j]>queue[k]) =y0C1LD+
break; H;YP8MoQ
SortUtil.swap(queue,j,k); J2'Nd'
k = j; WJ4li@T7V
} /f|X(docI
} [3{W^WSOz
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} XpBj%e:
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} I?ae\X@M
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SortUtil： kPF9Z "l
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package org.rut.util.algorithm; T>R0T{A
FW/W%^
import org.rut.util.algorithm.support.BubbleSort; STxKE %l
import org.rut.util.algorithm.support.HeapSort; 9J9)AV
import org.rut.util.algorithm.support.ImprovedMergeSort; fjs [f'L
import org.rut.util.algorithm.support.ImprovedQuickSort; f"qga/
import org.rut.util.algorithm.support.InsertSort; 6WU(%
import org.rut.util.algorithm.support.MergeSort; SVO3821
import org.rut.util.algorithm.support.QuickSort; 8]M_z:F7F
import org.rut.util.algorithm.support.SelectionSort; \E%'Y
import org.rut.util.algorithm.support.ShellSort; E ,|xJjh
S"OR%
/** ]3KhgK%c8
* @author treeroot CS==A57I
* @since 2006-2-2 S$Q8>u6Wk
* @version 1.0 v?& -xH-S
*/ 763v
public class SortUtil { :9$F'd\
public final static int INSERT = 1; Q4f/Z
public final static int BUBBLE = 2; Hhari!RXC
public final static int SELECTION = 3; 2@%$;.
public final static int SHELL = 4; n~A%q,DmF
public final static int QUICK = 5; x)rM/Kq
public final static int IMPROVED_QUICK = 6; {j:hod@-:5
public final static int MERGE = 7; W!?7D0q
public final static int IMPROVED_MERGE = 8; Db;G@#x
public final static int HEAP = 9; YRh BRE
Y6Lf@}2(i
public static void sort(int[] data) { (fCXxyZrr
sort(data, IMPROVED_QUICK); mo[Zb0>
} ?sMP~RHQ
private static String[] name={ 6y6<JR-V2k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2Fq<*pxAY
}; BPdfYu,il
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private static Sort[] impl=new Sort[]{ Y0_),OaY
new InsertSort(), )FpZPdN+h
new BubbleSort(), V{^!BBQ
new SelectionSort(), V??dYB(
new ShellSort(), u"d~!j1
new QuickSort(), '+$EhFwD
new ImprovedQuickSort(), }lfnnK#
new MergeSort(), dVsE^jsL
new ImprovedMergeSort(), $ep.-I>
new HeapSort() {|1Y:&M?
}; .8y3O]
F@<CsgKB-
public static String toString(int algorithm){ ad:&$
return name[algorithm-1]; 49w=XJ
} KN7n@$8YM
%oq[,h <X
public static void sort(int[] data, int algorithm) { *X, /7C
impl[algorithm-1].sort(data); @ ]/AjjLt
} %Mk0QKzUo
Zxbo^W[[
public static interface Sort { #1c_evH
public void sort(int[] data); H Ge0hl[n
} DM}YJ
D;_ MPN[
public static void swap(int[] data, int i, int j) { AKRTBjG"
int temp = data; /6h(6 *JI
data = data[j]; US%^#D q
data[j] = temp; DXa-rk8
} ~R&;v3
} #_(jS+lP?k