[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; M02uO`Y9
} 4S~o-`&W
int i1=l; h\plQ[T
int i2=mid+1; 8N:owK
for(int cur=l;cur<=r;cur++){ jV.g}F+1m
if(i1==mid+1) +!QJTn"3
data[cur]=temp[i2++]; j1_@qns{
else if(i2>r) <%xS{!'}
data[cur]=temp[i1++]; kb[P\cRa
else if(temp[i1] data[cur]=temp[i1++]; [:xiZ
else ~m|Mg9-
data[cur]=temp[i2++]; KIR'$ 6pn~
} M?=;JJ:
} [V4{c@
*),8PoT
} OB[o2G<0
*x)Ozfe
改进后的归并排序: 'V8N
e]jH+IR:>
package org.rut.util.algorithm.support; Bo<>e~6P
z4&iK)x
import org.rut.util.algorithm.SortUtil; u:aW 8
TCT57P#b
/** I^oE4o
* @author treeroot jV(6>BAI_
* @since 2006-2-2 C3G)'\yL
* @version 1.0 {R/C0-Q^^
*/ ix#epuN
public class ImprovedMergeSort implements SortUtil.Sort { nXjPx@
gN)c
private static final int THRESHOLD = 10; ;raN
B||;'
/* -P&6L\V
* (non-Javadoc) Lm@vXgMD
* "V&+7"Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `"qP
*/ 0IQ'3_
public void sort(int[] data) { {.yStB.T
int[] temp=new int[data.length]; ]xguBh]
mergeSort(data,temp,0,data.length-1); E*#]**
} ?$e9<lsQq)
iCHt1VV]
private void mergeSort(int[] data, int[] temp, int l, int r) { Bi@&nAhn@
int i, j, k; vD 5vbl
int mid = (l + r) / 2; )sho*;_o
if (l == r) :ss,Hl
return; XUuu-wm:}
if ((mid - l) >= THRESHOLD) 97K[(KE
mergeSort(data, temp, l, mid); ljKrj
else a>mm+L8y
insertSort(data, l, mid - l + 1); C&++VRnm
if ((r - mid) > THRESHOLD) ~rjTF!
mergeSort(data, temp, mid + 1, r); 5OoN!TEM
else }du XC[6
insertSort(data, mid + 1, r - mid); :VF<9@t
"B_K XL
for (i = l; i <= mid; i++) { cUDoN`fSl,
temp = data; V/LQ<Yke
} RT>{*E<I
for (j = 1; j <= r - mid; j++) { U%h);!<
temp[r - j + 1] = data[j + mid]; xQw7 :18wQ
} V7TVt,-3
int a = temp[l]; u*qV[y5Bl
int b = temp[r]; rp5(pV7*
for (i = l, j = r, k = l; k <= r; k++) { _z[#}d;k
if (a < b) { P ~PIMkt
data[k] = temp[i++]; o[H{(f1%
a = temp; -{`@=U
} else { |Yq$sU
data[k] = temp[j--]; c{[q>@y pK
b = temp[j]; A>{p2?`+!
} o!4!"O'E
} _gD pKEaY
} *Z_C4Tj
"bDs2E+W
/** 0(_l|PScF
* @param data 0@2mXO9f"
* @param l !~Q2|r
* @param i %%cHoprDa
*/ ={hX}"*D
private void insertSort(int[] data, int start, int len) { JoSJH35=:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OLI$1d_
} eHDef
} ^Q&u0;OJ
} [b:e:P 2
} :8A!HI}m{
=}PdH`S
堆排序： BcD&sQ2F
#$3yz'"QF
package org.rut.util.algorithm.support; G<M:Ak+~
s&GJW@ |
import org.rut.util.algorithm.SortUtil; i|1^+;
=!m}xdTP
/** '_b.\_s-d
* @author treeroot /*|oL#hK
* @since 2006-2-2 P]z[v)}
* @version 1.0 U\rh[0
*/ TNJG#8n%Y
public class HeapSort implements SortUtil.Sort{ N?X~w <
|pa$*/!NT
/* (non-Javadoc) uytE^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Et_V,s<|
*/ 0|; .6\
public void sort(int[] data) { UU8pz{/
MaxHeap h=new MaxHeap(); HK+/:'Pu
h.init(data); jSc#+_y
for(int i=0;i h.remove(); (@WA1oNG
System.arraycopy(h.queue,1,data,0,data.length); 0EJ(.8hwm
} 5JhdVnT_
:NJ(r(QG>
private static class MaxHeap{ V34hFa
hQNe;R5
void init(int[] data){ ;l}- Z@! /
this.queue=new int[data.length+1]; 1n\ t+F
for(int i=0;i queue[++size]=data; _e9:me5d"$
fixUp(size); ?JxbSK#
} ]\ngX;h8G
} (LHp%LaZ\;
e$Y[Z{T5
private int size=0; GA`PY-Vs)
W[+|}
private int[] queue; V(Yxh+KU
%7g:}O$
public int get() { -l}IZY
return queue[1]; >&!RWH9*q
} vy,&N^P
~SvC[+t+U
public void remove() { 5Zw1y@k(
SortUtil.swap(queue,1,size--); Y wkyq>Rv
fixDown(1); p\{-t84n
} bqQq=SO
file://fixdown [yj).*0
private void fixDown(int k) { BnRN;bu
int j; %& _V0R\k
while ((j = k << 1) <= size) { +y 87~]]
if (j < size %26amp;%26amp; queue[j] j++; <5=JE*s$NS
if (queue[k]>queue[j]) file://不用交换 <)*2LBF@]
break; *-s,. F+c
SortUtil.swap(queue,j,k); OiDhJ
k = j; 8>/Q1(q0
} #P#-xz
} 1 y}2+Kk
private void fixUp(int k) { ! Q<>3xZ
while (k > 1) { "7>>I D
int j = k >> 1; f&D]anf33
if (queue[j]>queue[k]) 8}w6z7e|{
break; q.2(OP>(
SortUtil.swap(queue,j,k); kF7V.m/~o
k = j; mJB2)^33a
} fI\9\x
} i@NqC;~;
4 g. bR
} 1009ES7*
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} L !4t[hhe=
Q!,<@b)
SortUtil： ob_I]~^I?|
fIF<g@s
package org.rut.util.algorithm; r}yG0c,
%r)avI
import org.rut.util.algorithm.support.BubbleSort; fFjH "2WD
import org.rut.util.algorithm.support.HeapSort; Il.Ed-&62
import org.rut.util.algorithm.support.ImprovedMergeSort; /m _kn
import org.rut.util.algorithm.support.ImprovedQuickSort; V#ev-\k}@
import org.rut.util.algorithm.support.InsertSort; 7m#[!%D
import org.rut.util.algorithm.support.MergeSort; 7j7e61 Ax
import org.rut.util.algorithm.support.QuickSort; | nJZie8m
import org.rut.util.algorithm.support.SelectionSort; qNyzU@
import org.rut.util.algorithm.support.ShellSort; /WPv\L
;O 0+,
/** 4lKVY<
* @author treeroot Nx#4W1B[`H
* @since 2006-2-2 YC]L)eafo`
* @version 1.0 LflFe@2
*/ 9x+<Ik
public class SortUtil { 6a}"6d/sTL
public final static int INSERT = 1; fx8EB8A7K7
public final static int BUBBLE = 2; 9{j66
public final static int SELECTION = 3; '2zL.:~
public final static int SHELL = 4; NvjJb-u
public final static int QUICK = 5; Ff^@~X+W<
public final static int IMPROVED_QUICK = 6; .ut{,(5
public final static int MERGE = 7; dMx4ykrR
public final static int IMPROVED_MERGE = 8; 1p`+
public final static int HEAP = 9; M9!AIHq4
a:YI"*S
public static void sort(int[] data) { !2:3MbtR
sort(data, IMPROVED_QUICK); iAMtejw
} 6{d6s#|%
private static String[] name={ U-wLt(Y<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~#\i!I;RY}
}; B@Nt`ky0*
h?\2_s
private static Sort[] impl=new Sort[]{ S~$'WA
new InsertSort(), ea=83 Zj
new BubbleSort(), Wi n8LOC
new SelectionSort(), 0%s|Zbo!>
new ShellSort(), nRhrWS
new QuickSort(), q^rl)
new ImprovedQuickSort(), *5$&`&,
new MergeSort(), AgF5-tz6x
new ImprovedMergeSort(), +)nT|w45
new HeapSort() iV.p5FD
}; ~`Qko-a&
M^rM-{?<
public static String toString(int algorithm){ >95TvJ
return name[algorithm-1]; Hg}I]!B
} {mE! Vf
V's:>;
public static void sort(int[] data, int algorithm) { XC15K@K
impl[algorithm-1].sort(data); FDFH,J`_
} RaSz>-3d
e2$]g>
public static interface Sort { .V6-(d
public void sort(int[] data); gM;}#>6
} XM Vq-8B0
[AEBF2OIv
public static void swap(int[] data, int i, int j) { TY;U2.Ud
int temp = data; NCA{H^CL
data = data[j]; @D`zKYwX1
data[j] = temp; i`%.
} ;)DzCc/
} !Q-wdzsp?