[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; 9)S3{i6w
} W<#!He
int i1=l; S&IW]ffK
int i2=mid+1; hg0{x/Dgny
for(int cur=l;cur<=r;cur++){ Da8gOZ
if(i1==mid+1) #W8?E_iu
data[cur]=temp[i2++]; KGc.YUoE
else if(i2>r) u ynudO
data[cur]=temp[i1++]; 2(~Zl\
else if(temp[i1] data[cur]=temp[i1++]; LVdR,'lS
else 0L32sFy
data[cur]=temp[i2++]; FCwE/ 2,
} z^tzP~nI
} s1::\&`za
d(V4;8a0
} BGj!/E
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改进后的归并排序: =$y J66e
rX5"p!z
package org.rut.util.algorithm.support; 3ww\Z8UeK
w{L9-o3A
import org.rut.util.algorithm.SortUtil; t@MUNW`Q
|X XO0
/** rf]z5;
* @author treeroot xgkCN$zQ`
* @since 2006-2-2 y!x[N!a
* @version 1.0 sk8DW
*/ C:^ :^y
public class ImprovedMergeSort implements SortUtil.Sort { 4t%Lo2v!X%
GKF!GbGR@
private static final int THRESHOLD = 10; (Ly^+Hjg
*}#HBZe(9
/* /!t:MK;
* (non-Javadoc) }TZM@{;
* hPG@iX|V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w<h8`K`3
*/ L.-qTh^P
public void sort(int[] data) { |k]]dP|:'
int[] temp=new int[data.length]; jxm#4
mergeSort(data,temp,0,data.length-1); <<gW`KF
} V"K.s2U^
F,VWi$Po\N
private void mergeSort(int[] data, int[] temp, int l, int r) { Uea2WJpX
int i, j, k; 9$9aBW
int mid = (l + r) / 2; $>_`.*I/
if (l == r) &#u\@Qze
return; $\]Mvd
if ((mid - l) >= THRESHOLD) EFI!b60mc
mergeSort(data, temp, l, mid); Z<AZO ^
else <Pe'&u
insertSort(data, l, mid - l + 1); A@d 2Ukv
if ((r - mid) > THRESHOLD) bW/T}FND
mergeSort(data, temp, mid + 1, r); Z]2z*XD
else ABp8PD
insertSort(data, mid + 1, r - mid); ZR)M<*$
sD?Ynpt
for (i = l; i <= mid; i++) { uhaHY`w
temp = data; \YF;/KwX$
} oL>o*/
for (j = 1; j <= r - mid; j++) { gth_Sz5!#
temp[r - j + 1] = data[j + mid]; e iH&<AH
} AhjCRYk+
int a = temp[l]; MX!N?k#KhP
int b = temp[r]; xa?auv!
for (i = l, j = r, k = l; k <= r; k++) { SjA'<ZX>TM
if (a < b) { /Gb)BJk!
data[k] = temp[i++]; |?f~T"|>
a = temp; >8vq`,e
} else { kxAT
data[k] = temp[j--]; r@'~cF]m
b = temp[j]; [(8s\>T
} !T~uxeZ/;
} .]<iRf[\[
} C4dCaiX
23bTCp.d
/** :Us+u-~
* @param data lPA}06hU
* @param l 2*n~r
* @param i JV!F<
*/ rJ6N'vw>
private void insertSort(int[] data, int start, int len) { ?g*.7Wc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~@}n}aV'!
} brqmi<*9"[
} (CYQ>)a
} Z{F^qwne
} ):L0{W{
rC/z8m3z
堆排序： <]`|HJoy
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package org.rut.util.algorithm.support; {G|= pM\'
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import org.rut.util.algorithm.SortUtil; iWe'|Br
Gch3|e
/** cy2K#
* @author treeroot /|v b)J
* @since 2006-2-2 kidv^`.H$w
* @version 1.0 #Qu|9Q[QH
*/ 3JF" O+@
public class HeapSort implements SortUtil.Sort{ mMK 93Ng"&
]qk`Yi
/* (non-Javadoc) +' .o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ExOSHKU,e
*/ %=vU Z4
public void sort(int[] data) { }[;r-5}
MaxHeap h=new MaxHeap(); [bBPs&7u
h.init(data); O%} hNTS"
for(int i=0;i h.remove(); NV2$ >D
System.arraycopy(h.queue,1,data,0,data.length); ]^QO^{Sz
} ~>3#c#[
%e/L .#0
private static class MaxHeap{ ng[LSB*57Y
7VfPS5se
void init(int[] data){ vH"^a/95|
this.queue=new int[data.length+1]; 7wbpQ&1_
for(int i=0;i queue[++size]=data; +3R/g@n
fixUp(size); m9$lOk4/
} z) "(&__
} ;xu&%n[6@
u$(XZ;Jg
private int size=0; mbIHzzW>
a#/~rNRY
private int[] queue; )6U^!95
)gxZ &n6
public int get() { lMjeq.5nP
return queue[1]; *UdP1?Y
} ^ `[T0X
>ZnnGX6$(
public void remove() { R& HkWe
SortUtil.swap(queue,1,size--); p!`S]\XEB
fixDown(1); OT3~5j1[
} 7hKfxw-X@
file://fixdown 'RIx}vPf
private void fixDown(int k) { (U|WP%IM'
int j; p3cb_
while ((j = k << 1) <= size) { )p 8P\Rl
if (j < size %26amp;%26amp; queue[j] j++; Q\*zF,ek
if (queue[k]>queue[j]) file://不用交换 jG/@kh*m
break; Y]"lcr}
SortUtil.swap(queue,j,k); #>">fs]
k = j; ?#/~BZR!
} qo:t"x^
} qfgw^2aUa
private void fixUp(int k) { s[u*~A
while (k > 1) { )bB Va^
int j = k >> 1; eY'RDQa
if (queue[j]>queue[k]) jlaC: (6
break; nMH:7[x3
SortUtil.swap(queue,j,k); aj$&~-/ R
k = j; [}?E,1Q3
} 1 o\COnt
} (iu IeJ^Z
SM[VHNr,-
} Q6%Pp_$k
\|C~VU@
} I\$?'q>
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SortUtil： ME'LZ"VT
H:,Hr_;nC
package org.rut.util.algorithm; 7y=1\KW(
G,,f' >
import org.rut.util.algorithm.support.BubbleSort; @BI;H V%k
import org.rut.util.algorithm.support.HeapSort; 3U[:N &Jb
import org.rut.util.algorithm.support.ImprovedMergeSort; +Sg+% 8T
import org.rut.util.algorithm.support.ImprovedQuickSort; -}"nb-RR\
import org.rut.util.algorithm.support.InsertSort; Kd7Lpw1u]
import org.rut.util.algorithm.support.MergeSort; opon"{
import org.rut.util.algorithm.support.QuickSort; o:lMRP~
import org.rut.util.algorithm.support.SelectionSort; dp*E#XCr1
import org.rut.util.algorithm.support.ShellSort; O\}w&BE:h
Z>ztFU
/** >xIb|Yp)&
* @author treeroot O2oF\E_6
* @since 2006-2-2 B1z7r0Rm,
* @version 1.0 /Ca M(^W
*/ hF9y^Hx4
public class SortUtil { t7,**$ST
public final static int INSERT = 1; p}|<EL}Z9
public final static int BUBBLE = 2; >\!k~Zi
public final static int SELECTION = 3; ]t_ Wl1*|
public final static int SHELL = 4; `6pz9j]
public final static int QUICK = 5; Q@cYHFi~+
public final static int IMPROVED_QUICK = 6; #[y2nK3zF
public final static int MERGE = 7; ])vqXjN6"
public final static int IMPROVED_MERGE = 8; ~!'T!g%C
public final static int HEAP = 9; c"NGE
5)p!}hWs
public static void sort(int[] data) { SHqz&2u
sort(data, IMPROVED_QUICK); j.KV:zJU
} _`xhP-,`S
private static String[] name={ S vW{1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BqDOo(%1)
}; gTg[!}_;\N
>UV?nXP}
private static Sort[] impl=new Sort[]{ /!W',9ua6
new InsertSort(), phy:G}F6%
new BubbleSort(), ?7w7Y;FuR
new SelectionSort(), 3OJGBiDAr
new ShellSort(), @EUvx
new QuickSort(), ab*O7v
new ImprovedQuickSort(), ^aY,Wq
new MergeSort(), *.+N?%sAP)
new ImprovedMergeSort(), W7.QK/@
new HeapSort() *r iWrG
}; y1Y
C40W@*6S2
public static String toString(int algorithm){ *%2,= p
return name[algorithm-1]; }*vO&J@z
} x24&mWgU
nT@FSt
public static void sort(int[] data, int algorithm) { gOkum_
impl[algorithm-1].sort(data); &a";jO GB
} J%8hf%!ud
S|T*-?|
public static interface Sort { g HKA:j`c
public void sort(int[] data); iG=XRctgj)
} u{|^5%)
d&%}u1 .
public static void swap(int[] data, int i, int j) { PAv<J<d
int temp = data; ;>jOB>b{h
data = data[j]; <Sp>uhet1
data[j] = temp; qz|xow/ns@
} "mAMfV0
} _cQhT