[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<7h[l
} O I0N(V
int i1=l; KO\-|#3y>
int i2=mid+1; tVe=c
for(int cur=l;cur<=r;cur++){ =axuLP))
if(i1==mid+1) 8(ot<3(D
data[cur]=temp[i2++]; kWacc&*|
else if(i2>r) .Y0O.
data[cur]=temp[i1++]; lNsdbyV'
else if(temp[i1] data[cur]=temp[i1++]; [1Aoj|
else i6f42]Jy
data[cur]=temp[i2++]; N^M6*,F,J
} &lgzNC9g%
} WH"'Ju5}
lCgzQZ
} BIS.,
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改进后的归并排序: JeN]sK)8x
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package org.rut.util.algorithm.support; fk9q3
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import org.rut.util.algorithm.SortUtil; %{7*o5`
+_{cq@c
/** DgK*>A
* @author treeroot M~7Cb>%<
* @since 2006-2-2 Fe %Vp/
* @version 1.0 +p`BoF9~
*/ xC9{hXg!
public class ImprovedMergeSort implements SortUtil.Sort { omGzyuPF
'7}2}KD
private static final int THRESHOLD = 10; MkHkM
Rc3!u^?u
/* EP"Z58&$R
* (non-Javadoc) ?A3u2-
* eEfGH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9XYm8g'X
*/ .vctuy&
public void sort(int[] data) { %6%mf>Guf
int[] temp=new int[data.length]; zy%0;%
mergeSort(data,temp,0,data.length-1); "O-X*>?f
} AE+BrN +"2
c~~4eia)
private void mergeSort(int[] data, int[] temp, int l, int r) { :4-,Ru1C"
int i, j, k; pdR\Ne0P*
int mid = (l + r) / 2; P 4t@BwU$
if (l == r) 5jso)`IL
return; M)!"R [V
if ((mid - l) >= THRESHOLD) /V{UTMSz
mergeSort(data, temp, l, mid); (sQXfeMz
else k7Qs#L
insertSort(data, l, mid - l + 1); RD"-(T
if ((r - mid) > THRESHOLD) I*^t!+q$
mergeSort(data, temp, mid + 1, r); #;~HoOK*#
else :hs~;vn)
insertSort(data, mid + 1, r - mid); j5Da53c#^
UimofFmI%
for (i = l; i <= mid; i++) { n42\ty9
temp = data; uV_%&P
} \/<VJB uV
for (j = 1; j <= r - mid; j++) { 8Th,C{
temp[r - j + 1] = data[j + mid]; \QC{38}
} +B1&bOb
int a = temp[l]; * 30K}&T
int b = temp[r]; h2T\%V_j
for (i = l, j = r, k = l; k <= r; k++) { Li}5aK
if (a < b) { z`t~N
data[k] = temp[i++]; +|d]\WlJ
a = temp; 1s@QsZ3
} else { _qf39fM;\
data[k] = temp[j--]; \Z3K ~
b = temp[j]; (m,H 5
} X*@ tp,t
} o ?vGI=
} AK,'KO%{=
r!dWI
/** 3k9n*jY0
* @param data Nz.X$zUmY
* @param l C 5gdvJN
* @param i F/BR#J1
*/ |xcI~ X7Q
private void insertSort(int[] data, int start, int len) { o zn&>k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aH{)|?
} @9KW ]7
} clV^Xg8D
} eNK +)<PK(
} |EX=Rj*
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堆排序： }|=/v(D
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package org.rut.util.algorithm.support; B F<u3p??
c#}K,joeU
import org.rut.util.algorithm.SortUtil; /9G72AD!
4)8VmCW
/** {:uv}4Z
* @author treeroot `T[@-
* @since 2006-2-2 `9K5 ;]
* @version 1.0 D1xGUz2r
*/ 0,t%us/q
public class HeapSort implements SortUtil.Sort{ l(sVnhL6h
#mu L-V
/* (non-Javadoc) "g^i%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f<@!{y2Xe
*/ hvw9i7#
public void sort(int[] data) { Uv *Aa7M
MaxHeap h=new MaxHeap(); TSP%5v;Dh
h.init(data); +`Z1L\gmA
for(int i=0;i h.remove(); (4R(5t
System.arraycopy(h.queue,1,data,0,data.length); w7U]-MW6A*
} ~Xxmj!nOf
4Lt9Dx1
private static class MaxHeap{ NVv <vu
S"Cz. bv
void init(int[] data){ ~U&NY7.@
this.queue=new int[data.length+1]; DYr#?} 40
for(int i=0;i queue[++size]=data; [v"Z2F<.=
fixUp(size); vAUt~X"
} ;9T}h2^`B
} %vJHr!x
/IUu-/ D
private int size=0; Zok{ndO@|f
!'jq.RawP
private int[] queue; Pqomi!1
\#9LwC"8;
public int get() { K.)!qkW-%S
return queue[1]; +'?Qph6o,7
} ^&eF916H
k5S;G"iJ
public void remove() { lnZ{Ryo(
SortUtil.swap(queue,1,size--); Lj1l]OD
fixDown(1); K|7"YNohfG
} =:WZV8@%
file://fixdown X1| +9
private void fixDown(int k) { 7s|'NTp
int j; dEoIVy_9R
while ((j = k << 1) <= size) { 03 @aG
if (j < size %26amp;%26amp; queue[j] j++; bBjr hi
if (queue[k]>queue[j]) file://不用交换 +94)BxrY
break; Pp8S\%z~h
SortUtil.swap(queue,j,k); \]tBwa
k = j; 3B&A)&pEO
} ob.<j
} k)p`x"To
private void fixUp(int k) { \zO.#H
while (k > 1) { /s\ mV
int j = k >> 1; \H] |5fp*
if (queue[j]>queue[k]) 2}vibDq p
break; O*xx63%jR
SortUtil.swap(queue,j,k); +Iyyk02V
k = j; zKQ<Zr
} |#TU"$;
} #t+?eye~
#I/P9)4
} \`n(JV
sf> E
} #dauXUKH
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SortUtil： S,&LH-ps
6$`<Y?
package org.rut.util.algorithm; O=0p}{3l
:@L7RZ`_
import org.rut.util.algorithm.support.BubbleSort; MP%#)O6
import org.rut.util.algorithm.support.HeapSort; }a]`"_i;[
import org.rut.util.algorithm.support.ImprovedMergeSort; I,?NYIG"(
import org.rut.util.algorithm.support.ImprovedQuickSort; */aY$aWv
import org.rut.util.algorithm.support.InsertSort; X|of87
import org.rut.util.algorithm.support.MergeSort; &[ })FI
import org.rut.util.algorithm.support.QuickSort; +:KZEFY?<
import org.rut.util.algorithm.support.SelectionSort; QQJGqM3a2
import org.rut.util.algorithm.support.ShellSort; S^QEctXU
CmU@8-1
/** #7uH>\r
* @author treeroot VUP|j/qD
* @since 2006-2-2 _J,**AZ~z
* @version 1.0 BtJkvg(2]
*/ P;5)Net1X
public class SortUtil { @2Z|\ojJ
public final static int INSERT = 1; MK#
public final static int BUBBLE = 2; 3D|Lb]=
public final static int SELECTION = 3; N.|F8b]v
public final static int SHELL = 4; xQ9t1b|{e
public final static int QUICK = 5; #qd!_oN
public final static int IMPROVED_QUICK = 6; '(]Wtx%9"
public final static int MERGE = 7; <J8c dB!e
public final static int IMPROVED_MERGE = 8; i\xs!QU
public final static int HEAP = 9; [v1$Lp
P]+B}))
public static void sort(int[] data) { (B#FLoK
sort(data, IMPROVED_QUICK); )<x9t@$
} H I9/
private static String[] name={ S'x ]c#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?q!4REM
}; l$u52e!7
<@J$hs9s
private static Sort[] impl=new Sort[]{ MTYV~S4/
new InsertSort(), 3W'fEh5
new BubbleSort(), r\m{;Z#LJm
new SelectionSort(), 7w73,r/D8A
new ShellSort(), RE!WuLs0"
new QuickSort(), +Xg:*b9So
new ImprovedQuickSort(), =eA|gt
new MergeSort(), ?y|&Mz'XJ(
new ImprovedMergeSort(), ww|fqx?
new HeapSort() nOC\ =<Nsg
}; DY`0 `T
+}jzge"
public static String toString(int algorithm){ jdG'sITv
return name[algorithm-1]; &>-'|(m+2
} PTHxvml
bWL!=
public static void sort(int[] data, int algorithm) { xxGm T.&
impl[algorithm-1].sort(data); \BBs;z[/
} qiOtbH=
:V(C+bm *
public static interface Sort { ]MCH]/
public void sort(int[] data); i,^-9
} /[c_,G""
j*>]HNo&
public static void swap(int[] data, int i, int j) { x|Uwk=;X|s
int temp = data; #~Xj=M%
data = data[j]; &._"rhz
data[j] = temp; G;gsDn1t
} cRI2$|
} Dp['U