[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; 4#dS.UfI
} z0yPBt1W
int i1=l; D-v}@tS'
int i2=mid+1; l r16*2.
for(int cur=l;cur<=r;cur++){ +2qCH^80
if(i1==mid+1) T5:p^;?g
data[cur]=temp[i2++]; ^ UB*Q
else if(i2>r) :1O49g3R
data[cur]=temp[i1++]; KOYU'hw
else if(temp[i1] data[cur]=temp[i1++]; lhp.zl
else ;J]Lzh
data[cur]=temp[i2++]; +*'^T)sj/
} vVA)x~^
} qHU=X"rn
\$Jz26 -n
} :u ruC
Cyn_UE
改进后的归并排序: ['`Vg=O.{
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package org.rut.util.algorithm.support; AA&5wDMV>
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import org.rut.util.algorithm.SortUtil; BEfP#h=hr
Xb/W[rcs
/** l-~ o&n
* @author treeroot OYbgt4
* @since 2006-2-2 ZcP/rT3{^
* @version 1.0 UP+4xG
*/ ,; 81FK
public class ImprovedMergeSort implements SortUtil.Sort { W%&[gDp
bb@3%r|_<
private static final int THRESHOLD = 10; aRc2#:~;
t>Ot)d
/* f@)GiLC'"
* (non-Javadoc) 3-%F)@n
* }O7!>T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <$:Hf@tpMo
*/ -9X#+-
public void sort(int[] data) { v}>5!*
int[] temp=new int[data.length]; axpn*(yE
mergeSort(data,temp,0,data.length-1); Z1&<-T_
} u3VSS4RG%
GcHy`bQbiX
private void mergeSort(int[] data, int[] temp, int l, int r) { Gc1!')g!
int i, j, k; +{7/+Zz
int mid = (l + r) / 2; DV6B_A{kI
if (l == r) 7)FI_uW
return; 1>"Yw|F-|3
if ((mid - l) >= THRESHOLD) &%infPI'
mergeSort(data, temp, l, mid); ?T (@<T
else B=,j$uH
insertSort(data, l, mid - l + 1); $I$ B8
if ((r - mid) > THRESHOLD) '|jN!y^2p
mergeSort(data, temp, mid + 1, r); :'+- %xUM
else o4l=oY:'
insertSort(data, mid + 1, r - mid); aR@s. ll
]?/7iM
for (i = l; i <= mid; i++) { =]Vrl-a`^
temp = data; '(.vB~m7*+
} 'xn3g;5
for (j = 1; j <= r - mid; j++) { `yXJaTbo
temp[r - j + 1] = data[j + mid]; vf&Sk`
} VW%eB
int a = temp[l]; RY\[[eG
int b = temp[r]; tAxS1<T4
for (i = l, j = r, k = l; k <= r; k++) { Gd:fh5u':
if (a < b) { C3#mmiL-
data[k] = temp[i++]; 1#OM~v6B
a = temp; ?_<14%r;
} else { jeLC)lQ*
data[k] = temp[j--]; +j">Ju6Q;.
b = temp[j]; 9D+B~8[SQ
} Scfk]DT
} TQjM3Ri=V
} 8h=Rfa9
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/** 5Y}=,v*h}
* @param data ] 1:pnd
* @param l r'/H3
* @param i HT@/0MF{J
*/ NR@n%p
private void insertSort(int[] data, int start, int len) { Y{v\m(D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lA1l
} *(pmFEc
} 7z@Jw
} x[w!buV0\
} 6%8,OOS
/#]4lFk:h
堆排序： no`>r}C
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package org.rut.util.algorithm.support; 3ug-cq
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import org.rut.util.algorithm.SortUtil; U$+G9
D)my@W0,
/** UrhSX!g/A>
* @author treeroot $RJpn]d j
* @since 2006-2-2 ]!=,8dY
* @version 1.0 8G6[\P3fQ
*/ Eqc,/
public class HeapSort implements SortUtil.Sort{ <dAD-2O+
nYF;.k
/* (non-Javadoc) q=+AN</
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x+V@f~2F
*/ A['0~tOP
public void sort(int[] data) { }1)tALA
MaxHeap h=new MaxHeap(); sERm+x<
h.init(data); q%H#04Yh
for(int i=0;i h.remove(); }wkZ\q[
System.arraycopy(h.queue,1,data,0,data.length); LaolAqU
} <Jwx|
OU /=wpt
private static class MaxHeap{ @9X+ BdQU
@|hn@!YK
void init(int[] data){ x_K8Gr#Z0
this.queue=new int[data.length+1]; 6$k"B/k
for(int i=0;i queue[++size]=data; +l8`oQuG
fixUp(size); K:3u/C`
} K>a+-QWK3
} ?-HLP%C('
F#S)))#
private int size=0; Munal=wL
F=qG+T
private int[] queue; j4fv-{=$
^zs]cFN#%
public int get() { 6bXP{,}Gp
return queue[1]; btV Tt5
} ]?$eBbt
dhAkD-Lh
public void remove() { [Jjb<6[o
SortUtil.swap(queue,1,size--); h jCkj(b
fixDown(1); [IgB78_$
} 'q:t48&
file://fixdown QwaAGUA
private void fixDown(int k) { w.2[Xx~
int j; *;noZ9{"+
while ((j = k << 1) <= size) { erW[q
if (j < size %26amp;%26amp; queue[j] j++; A/%+AH(
if (queue[k]>queue[j]) file://不用交换 A3Lfh6O
break; d77->FX2
SortUtil.swap(queue,j,k); jwe^(U
k = j; JO^E x1c
} NGYUZ\m
} 2 u{"R
private void fixUp(int k) { H}[kit*9
while (k > 1) { f L}3I(VK
int j = k >> 1; 1;Dug
if (queue[j]>queue[k]) Y4 <
break; I5$@1+B
SortUtil.swap(queue,j,k); S=R}#
k = j; 7Y?=ijXXx\
} ~}g"Fe
} l1utk8'-
ha%3%O8Z
} Gd]!D~[1
Y9K$6lz
} u0M? l
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SortUtil： dg?[gD8!4&
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package org.rut.util.algorithm; D@]*{WO
^-24S#KE
import org.rut.util.algorithm.support.BubbleSort; 8!T6N2O6d
import org.rut.util.algorithm.support.HeapSort; $<~o,e-4
import org.rut.util.algorithm.support.ImprovedMergeSort; .8O.
import org.rut.util.algorithm.support.ImprovedQuickSort; uzA_Zjx
import org.rut.util.algorithm.support.InsertSort; #RG/B2
import org.rut.util.algorithm.support.MergeSort; >C1**GQ
import org.rut.util.algorithm.support.QuickSort; k$u/6lw]IB
import org.rut.util.algorithm.support.SelectionSort; %nmD>QCe
import org.rut.util.algorithm.support.ShellSort; ZMI!Sl
*&m{)cTs
/** )<vU F]e~
* @author treeroot [ ;$(;
* @since 2006-2-2 ^zv,VD
* @version 1.0 OjUZ-_J
*/ UZ`GS$D@
public class SortUtil { C_RxJWka
public final static int INSERT = 1; ^F*G
public final static int BUBBLE = 2; n&51_.@Q
public final static int SELECTION = 3; 2GHmA_7P
public final static int SHELL = 4; !5/jDvh
public final static int QUICK = 5; _I&];WM\
public final static int IMPROVED_QUICK = 6; =Z($n:m=*
public final static int MERGE = 7; 4]VoIUIuN
public final static int IMPROVED_MERGE = 8; &6yh4-(7
public final static int HEAP = 9; <ah!!
RO]Vn]qb
public static void sort(int[] data) { ?0{8fGM4
sort(data, IMPROVED_QUICK); Q}A*{9#|
} bm &$wf
private static String[] name={ ncGg@$E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?_!} lg
}; "wB~*,Ny
>A+0"5+_p
private static Sort[] impl=new Sort[]{ D]{#!w(d
new InsertSort(), zJ*|tw4
new BubbleSort(), w=UFj
new SelectionSort(), 4FWb5b!A=
new ShellSort(), ^RS?y8
new QuickSort(), OF4iGFw
new ImprovedQuickSort(), ?D6?W6@
new MergeSort(), '`/Qr~]
new ImprovedMergeSort(), (sXR@Ce$
new HeapSort() (4hCT*
}; !c;Z<@
@Qlh
public static String toString(int algorithm){ dK5|tWJX
return name[algorithm-1]; O,&nCxB]
} * mzJ)4A
AB!P(
public static void sort(int[] data, int algorithm) { [SFX;v!9
impl[algorithm-1].sort(data); DRo?7_
} cVx#dDdA
Y[hTO.LF
public static interface Sort { Y5 BWg
public void sort(int[] data); CSUXa8u7
} (iwZs:k-
'Mfn:n+
public static void swap(int[] data, int i, int j) { yX%Xjo__*t
int temp = data; qqmhh_[T
data = data[j]; n#{z"G
data[j] = temp; rv75R}.6R^
} ku@sQn
} %Km^_JM