[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; bhD ~4Rz
} Ry z?v<)h
int i1=l; +3;Ody"59
int i2=mid+1; g:_hj_1Y M
for(int cur=l;cur<=r;cur++){ }B0sC%cm
if(i1==mid+1) rfs(#
data[cur]=temp[i2++]; 6\4Z\82
else if(i2>r) l&L,7BX
data[cur]=temp[i1++]; @RGDhwS47
else if(temp[i1] data[cur]=temp[i1++]; CbOCk:,g5
else GRT]aw
data[cur]=temp[i2++]; 3pSj kS|?>
} */w7?QOv
} jH>8bXQqZ
;3;2h+U*
} CvK3H\.&;k
}3Y <$YL"R
改进后的归并排序: _A{+H^,
ZQAO"huk]
package org.rut.util.algorithm.support; :"<e0wDu[
@'i+ff\
import org.rut.util.algorithm.SortUtil; ;F5"}x
<~{du ?4n
/** *%\mZ,s"
* @author treeroot S/4r\6
* @since 2006-2-2 jvHFFSK
* @version 1.0 uvnI>gv
*/ r|GY]9
public class ImprovedMergeSort implements SortUtil.Sort { W;zpt|kAH
zrRFn `B
private static final int THRESHOLD = 10; *}cSE|S%
7+nm31,<O
/* >{5 p0
* (non-Javadoc) ET:T7
* 1u~ MXGF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "3fBY\>a
*/ 5Fbs WW2
public void sort(int[] data) { 2q PhLCeZ
int[] temp=new int[data.length]; u5Up&QE!>q
mergeSort(data,temp,0,data.length-1); 2-dh;[4
} 3K>gz:dt
4w4^yQE
private void mergeSort(int[] data, int[] temp, int l, int r) { + P7o4]:/
int i, j, k; 7 [d?
int mid = (l + r) / 2; XF*.Jg]
if (l == r) M;jcUX_{
return; m%QSapV
if ((mid - l) >= THRESHOLD) ;3"@g]e
mergeSort(data, temp, l, mid); VUtXxvH
else 5u$D/* Eb
insertSort(data, l, mid - l + 1); n2f6p<8A
if ((r - mid) > THRESHOLD) #HAC*n
mergeSort(data, temp, mid + 1, r); < Ek/8x
else 0[T,O,y
insertSort(data, mid + 1, r - mid); |3shc,7
PFrfd_s{>\
for (i = l; i <= mid; i++) { dJ ~Zr)>
temp = data; kn"q:aD
} !'G~k+
for (j = 1; j <= r - mid; j++) { "Sridh?
temp[r - j + 1] = data[j + mid]; $,fy$ Qk,S
} Xg7|JS!
int a = temp[l]; 6N~q`;p0
int b = temp[r]; AjkW0FB:1
for (i = l, j = r, k = l; k <= r; k++) { V'DA[{\*
if (a < b) { UZ2TqR
data[k] = temp[i++]; MHi8E9_O
a = temp; )Si2u5
} else { Ps4 ZFX
data[k] = temp[j--]; @1-F^G%p8
b = temp[j]; z6*<V5<7
} 3jZ6kfj
} Y32 "N[yw
} R=]d%L8
xQ4%e[/
/** Kibr ]w
* @param data Hfym30
* @param l N&,]^>^u
* @param i !do?~$Og
*/ pH@]Y+W
private void insertSort(int[] data, int start, int len) { SaOYu &>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \%0n}.A
} r'GP$0rr9!
} U{@5*4
} CGbwmPx
} L|hx arJ
wkUlrL/~
堆排序： LR(-<"
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package org.rut.util.algorithm.support; #V,R >0"
K/=|8+IDL
import org.rut.util.algorithm.SortUtil; "Gb1K9A im
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/** Ztr Cv?
* @author treeroot _hu")os
* @since 2006-2-2 fHRMu:q
* @version 1.0 {)8>jxQN
*/ Az;t"
public class HeapSort implements SortUtil.Sort{ @p6<Lw_E
b^0}}12
/* (non-Javadoc) Jl3g{a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PwB1]p=
*/ sEJC-$
public void sort(int[] data) { GfEX>
MaxHeap h=new MaxHeap(); T .FI'wy
h.init(data); U1nw-Q+
for(int i=0;i h.remove(); "VG+1r+]4
System.arraycopy(h.queue,1,data,0,data.length); %Dg0fL
} @Fp_^5
}7E^ZZ]f
private static class MaxHeap{ G` XC
o1cErI&q"
void init(int[] data){ ~Wo)?q8UY,
this.queue=new int[data.length+1]; Y_woKc*
for(int i=0;i queue[++size]=data; G3G#ep~)vC
fixUp(size); F8:vDv
} Zwz&rIQpT
} ",7Q
C?Bl{4-P}*
private int size=0; #|&Sc_#4)
1i[FY?6`dh
private int[] queue; nw>8GivO
9RN-suE[
public int get() { T&4qw(\G
return queue[1]; SN7"7joP<
} SCvVt
N,8/Y
public void remove() { =U%Rvm
SortUtil.swap(queue,1,size--); -K9c@?
fixDown(1); |KSy`lY-j>
} 1cS}J:0P
file://fixdown 8>,jpAN}r
private void fixDown(int k) { (q+)'H%iK
int j; 7(5xL T$
while ((j = k << 1) <= size) { 5[0 O'%$
if (j < size %26amp;%26amp; queue[j] j++; = C4
if (queue[k]>queue[j]) file://不用交换 EkgE_8
break; &e6CJ
SortUtil.swap(queue,j,k); &wD;SMr<
k = j; 35E_W>n
} Tq]Sn]CSP
} qlL`jWJ
private void fixUp(int k) { mEw ~yOW]M
while (k > 1) { na9sm
int j = k >> 1; ]gYz 4OT
if (queue[j]>queue[k]) ~0beuK&p
break; S S2FTb-m
SortUtil.swap(queue,j,k); L#E] BY
k = j; yW$0\E6<r
} N"nd*?
} oD<kMK
JSW^dw&
} yE}}c{hSn
~//fN}~R
} )+:EJH~
!O`(JSoG
SortUtil： ;\f gF@
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package org.rut.util.algorithm; s2Mb[#:a"
{ ^cV lC_
import org.rut.util.algorithm.support.BubbleSort; q Y#n'&
import org.rut.util.algorithm.support.HeapSort; ?>I;34tL(
import org.rut.util.algorithm.support.ImprovedMergeSort; I'V4D[H5
import org.rut.util.algorithm.support.ImprovedQuickSort; 0NS<?p~_S
import org.rut.util.algorithm.support.InsertSort; /YZr~|65
import org.rut.util.algorithm.support.MergeSort; E\Rhz]G(
import org.rut.util.algorithm.support.QuickSort; x>Zn?YR,"
import org.rut.util.algorithm.support.SelectionSort; b )B? F
import org.rut.util.algorithm.support.ShellSort; {q"OM*L(
"?V0$-DR
/** i_j[?.?X}
* @author treeroot &YF^j2
* @since 2006-2-2 1v71rf&w
* @version 1.0 C?lcGt!H
*/ mV3cp rRqv
public class SortUtil { O8h%3&
public final static int INSERT = 1; HZ'_r cv
public final static int BUBBLE = 2; 9I&xfvD,
public final static int SELECTION = 3; nih0t^m'
public final static int SHELL = 4; 19w*!FGX
public final static int QUICK = 5; 7Zlw^'q$:L
public final static int IMPROVED_QUICK = 6; M7pOLP_1jB
public final static int MERGE = 7; WA+iYLx@H
public final static int IMPROVED_MERGE = 8; ,yiX# ;j
public final static int HEAP = 9; Mu+0<>
~_/(t'9
public static void sort(int[] data) { Qk:Y2mL
sort(data, IMPROVED_QUICK); 8fl`r~bqZ
} ZrsBm_Rx
private static String[] name={ /;oX)]W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "N`[r iq{
}; kqFP)!37
'<"s \,
private static Sort[] impl=new Sort[]{ @7IIM{
new InsertSort(), `@`CG[-9
new BubbleSort(), 3kybLOG
new SelectionSort(), )h7<?@wv&
new ShellSort(), e)d`pQ6
new QuickSort(), <g$~1fa
new ImprovedQuickSort(), !2ZF(@C/
new MergeSort(), |olA9mp|]
new ImprovedMergeSort(), nAv#?1cjz
new HeapSort() aDU<wxnSvO
}; k$blEa4
1q7|OWFT
public static String toString(int algorithm){ f4fvrL
return name[algorithm-1]; N sXHO
} 8WXQOo8
MN\HDKN
public static void sort(int[] data, int algorithm) { 3}}38A|4
impl[algorithm-1].sort(data); Y3Yz)T}UkS
} e"|efE
KVclhT<F
public static interface Sort { ]'&LGA`
public void sort(int[] data); '=b/6@&
} ;r<^a6B
F1*>y
public static void swap(int[] data, int i, int j) { ItNz}4o|d
int temp = data; d3\qKL!~
data = data[j]; pM4 :#%V
data[j] = temp; Mk"^?%PxT
} H?yK~bGQ
} l9{hq/V