[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; fqm-?vy}
} \F8:6-
int i1=l; q c DJ
int i2=mid+1; fl+dL#]
for(int cur=l;cur<=r;cur++){ (X/dP ~
if(i1==mid+1) 2*pNIc
data[cur]=temp[i2++]; XJ6=Hg4_O
else if(i2>r) N?l
data[cur]=temp[i1++]; 5c 69M5
else if(temp[i1] data[cur]=temp[i1++]; YDjjhe+
else XFi!=|F
data[cur]=temp[i2++]; ,tl(\4n
} M-zqD8D
} U}c05GiQw
Lt2<3DB
} 3FsX3K,_X
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改进后的归并排序: "VgPaz#
1qE*M7_:E>
package org.rut.util.algorithm.support; \:Z8"~G
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import org.rut.util.algorithm.SortUtil; V7)<MY
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/** <G /a-Z
* @author treeroot cIQe^C
* @since 2006-2-2 3Bbd2[<W
* @version 1.0 4;)aGN{e
*/ Psw<9[
public class ImprovedMergeSort implements SortUtil.Sort { NxrfRhaU3
3Q2z+`x'
private static final int THRESHOLD = 10; TQ69O +
i/j eb*d0
/* "W@>lf?"
* (non-Javadoc) rtT*2k*
* ueLdjASJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >vZ^D
*/ KA{JSi
public void sort(int[] data) { u iR[V~
int[] temp=new int[data.length]; zw}Wm4OH
mergeSort(data,temp,0,data.length-1); a]t| /Mq
} .*{0[
OY,iz
private void mergeSort(int[] data, int[] temp, int l, int r) { i _YJq;(
int i, j, k; 5uO.@0
int mid = (l + r) / 2; ]}d.h!`<)
if (l == r) iu'At7
return; >"<<hjKJ
if ((mid - l) >= THRESHOLD) 8?G534*r@2
mergeSort(data, temp, l, mid); 7"p%c`*;
else <>R\lPI2
insertSort(data, l, mid - l + 1); 66l+cb
if ((r - mid) > THRESHOLD) &b=OT%D~FU
mergeSort(data, temp, mid + 1, r); NflRNu:-
else 9PWqoz2c
insertSort(data, mid + 1, r - mid); 2SJ|$VsLaE
JB9s#`
for (i = l; i <= mid; i++) { nD}CQ_C
temp = data; pg/SYEvsV
} cb`ik)=K%
for (j = 1; j <= r - mid; j++) { A9kn\U92
temp[r - j + 1] = data[j + mid]; ]z"7v
} -jcgxQH53
int a = temp[l]; FSHC\8siS
int b = temp[r]; a n|bzG
for (i = l, j = r, k = l; k <= r; k++) { qV:TuR-|w
if (a < b) { i?]`9z
data[k] = temp[i++]; }q=uI`
a = temp; #8i9@w
} else { )5Ofr-Y
data[k] = temp[j--]; ldRisL
b = temp[j]; ]Nb~-)t%B
} 2A(IsUtqO:
} @0fiui_
} Fg^Z g\X3
+W^$my)<
/** +.IncY8C$
* @param data @9\L|O'~?
* @param l f6JC>Np
* @param i k'PNfx\K
*/ `c/mmS
private void insertSort(int[] data, int start, int len) { fB`7f $[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o>@9[F,h+
} U%l<48@8
} RZTC+ylj
} i1DJ0xC]
} A?ij
!"s~dL,7
堆排序： D |9ItxYu
u8b^DB#+W
package org.rut.util.algorithm.support; Bw4 _hlm
V@`A:Nc_>
import org.rut.util.algorithm.SortUtil; Z lR2
CNrK]+>
/** C#:L.qK
* @author treeroot VD+y4t'^
* @since 2006-2-2 z0xw0M+X
* @version 1.0 :i/uRR
*/ 0%;y'd**Ck
public class HeapSort implements SortUtil.Sort{ *L=F2wW
BiD}C
/* (non-Javadoc) H\<^p",`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *IV_evgM7
*/ 6w*q~{"(
public void sort(int[] data) { n--w-1
MaxHeap h=new MaxHeap(); `Uy4>?
h.init(data); 1D2Yued
for(int i=0;i h.remove(); ,&0iFUwN_
System.arraycopy(h.queue,1,data,0,data.length); Or"+d 5
} Usf7 AS=
w/Y6m.i1
private static class MaxHeap{ @{o3NR_
=6< Am
void init(int[] data){ t[HA86X
this.queue=new int[data.length+1]; %C~LKs5oH
for(int i=0;i queue[++size]=data; k/.a yLq
fixUp(size); !R3ZyZcX
} V^qkHm e
} .;jp2^
m$80D,3
private int size=0; #ByrX\
sX|bp)Nw
private int[] queue; 8mv}-;
*."a>?D~
public int get() { TY*uK
return queue[1]; T5? eb"
} kC=h[<'
be+tAp`
public void remove() { "t:9jU
SortUtil.swap(queue,1,size--); }TsND6Ws3
fixDown(1); Is#w=s}2
} ;}QM#5Xdt
file://fixdown ZmzYJ$:6
private void fixDown(int k) { hVdPO
int j; XWYLa8Ef
while ((j = k << 1) <= size) { _l$X![@6=
if (j < size %26amp;%26amp; queue[j] j++; 48"=,IrM
if (queue[k]>queue[j]) file://不用交换 {B)-+0 6
break; UQ.DKUg
SortUtil.swap(queue,j,k); :Kx6|83
k = j; >Z!H9]f(
} ];hK5
} [zc8f
private void fixUp(int k) { V jZx{1kCR
while (k > 1) { 8bW,.to(?x
int j = k >> 1; 9t o2V
if (queue[j]>queue[k]) }4wIfI83K,
break; KXbD7N.
SortUtil.swap(queue,j,k); t7qzAr
k = j; *;X,yEK[
} 8|H^u6+yz
} 6[SE*/E@L
;.#l[
} ^UiSezcI
oV=~Q#v
} C ehz]C
8D1+["&
SortUtil： _0 $W;8X
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package org.rut.util.algorithm; Ph/!a6y
U[WR?J4~LX
import org.rut.util.algorithm.support.BubbleSort; 3v@Y"I3;
import org.rut.util.algorithm.support.HeapSort; H*VZ&{\7
import org.rut.util.algorithm.support.ImprovedMergeSort; >TB Rp,;r
import org.rut.util.algorithm.support.ImprovedQuickSort; m8C scCZ}
import org.rut.util.algorithm.support.InsertSort; ^:64(7
import org.rut.util.algorithm.support.MergeSort; sB'Z9
import org.rut.util.algorithm.support.QuickSort; _MST8
import org.rut.util.algorithm.support.SelectionSort; PR;A 0
import org.rut.util.algorithm.support.ShellSort; )]P%=
Z Vj
/** BIeeu@p
* @author treeroot <6[P5>
* @since 2006-2-2 ?0VETa ~m
* @version 1.0 ~$:=hT1
*/ :iVEm9pB)
public class SortUtil { <WGx 6{
public final static int INSERT = 1; {3R?<ET]mt
public final static int BUBBLE = 2; ED=P 6u
public final static int SELECTION = 3; -9@/S$i
public final static int SHELL = 4; Mr u
public final static int QUICK = 5; 8>l#F<@5
public final static int IMPROVED_QUICK = 6; jO+#$=C
public final static int MERGE = 7; wTK>U`o
public final static int IMPROVED_MERGE = 8; ~N=$%C
public final static int HEAP = 9; t?6_^ 08
a?5R;I B
public static void sort(int[] data) { }`*DMI;-
sort(data, IMPROVED_QUICK); ("5Eed
} 9&7$oI$!J
private static String[] name={ [r;hF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OF/DI)j3
}; -]e@FNL
[lbe_G;
private static Sort[] impl=new Sort[]{ g@][h_? {
new InsertSort(), M<VZISu)dy
new BubbleSort(), (J,^)!g7
new SelectionSort(), ,!'L~{
new ShellSort(), iQj2aK Gs
new QuickSort(), [|E|(@J
new ImprovedQuickSort(), ?K/N{GK%{
new MergeSort(), ITf, )?|]Y
new ImprovedMergeSort(), \Czuf
new HeapSort() ;"j>k>tg
}; _7qGo7bpN
DP<[Uz&
public static String toString(int algorithm){ 6p1)wf.J
return name[algorithm-1]; I@9[
} vhot-rBN
?)i`)mu'
public static void sort(int[] data, int algorithm) { +ZU@MOni
impl[algorithm-1].sort(data); \qB:z7I2
} Y*q_>kps"
HMrl!;:
public static interface Sort { f{j(H?5
public void sort(int[] data); Wi3St`$
} +(qs{07A$
Y[WL}:"93
public static void swap(int[] data, int i, int j) { UYW{AG2C
int temp = data; ,s.{R
data = data[j]; Weu%&u-
data[j] = temp; %}x$YDO
} =V(|3?N
} e~iPN.'1