[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; CmnHh~%
} F>-}*o
int i1=l; m#n]Wgp'
int i2=mid+1; 8wmQ4){
for(int cur=l;cur<=r;cur++){ x<>YUw8`
if(i1==mid+1) P)hi||[
data[cur]=temp[i2++]; ;_N5>3C:
else if(i2>r) aq$q ~,E
data[cur]=temp[i1++]; ,Xtj;@~-
else if(temp[i1] data[cur]=temp[i1++]; KUKI qAA
else bo>E"<
data[cur]=temp[i2++]; 8R?I`M_b
} $>r5>6
} m9t$h
g "*;nHI D
} H=<LutnZ
F#|Z# Mu
改进后的归并排序: RRzP*A%=
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package org.rut.util.algorithm.support; %b?uW]j:
P=gJAE5
import org.rut.util.algorithm.SortUtil; _ZyT3P&
u"Y]P*[k
/** Nfaf;;J}
* @author treeroot Q0>q:aj\
* @since 2006-2-2 'RLOV
* @version 1.0 CXAVGO'xw
*/ &,MFB
public class ImprovedMergeSort implements SortUtil.Sort { Ct!S Tk[2
>lLo4M 3
private static final int THRESHOLD = 10; A ~&+F>Z
X"<|Z]w
/* H~Uq?!=b
* (non-Javadoc) wOg,SMiq
* %{'4. ,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qqvF-mDN
*/ A[JM4x
public void sort(int[] data) { ir&.Z5=
int[] temp=new int[data.length]; "DpKrVuG
mergeSort(data,temp,0,data.length-1); I$j|Rq
} J-XTN"O
C}Qt "-%
private void mergeSort(int[] data, int[] temp, int l, int r) { (STx$cya
int i, j, k; -nR\,+N
int mid = (l + r) / 2; 28UVDG1?
if (l == r) A*i_|]Q
return; sE9Ckc5
if ((mid - l) >= THRESHOLD) *eGM7o*\X
mergeSort(data, temp, l, mid); 8x{Hg9
else BIfi:7I;Q
insertSort(data, l, mid - l + 1); CDCC1BG"
if ((r - mid) > THRESHOLD) 2f..sNz
mergeSort(data, temp, mid + 1, r); 9XOyj5
else {Hk/1KG>
insertSort(data, mid + 1, r - mid); %VJW@S>j/
sfI N)jh
for (i = l; i <= mid; i++) { BX3lPv
temp = data; i0ybJOa4
} LNiS`o\
for (j = 1; j <= r - mid; j++) { OKPJuV`y6
temp[r - j + 1] = data[j + mid]; _tWE8r,
} GV6mzD@<
int a = temp[l]; q-IWRb0j%a
int b = temp[r]; ( 3;`bvYH"
for (i = l, j = r, k = l; k <= r; k++) { P']Y( !L
if (a < b) { *rf$>8~$n
data[k] = temp[i++]; aR)?a;}H
a = temp; ik\S88|
} else { JXm?2/
data[k] = temp[j--]; XeU<^ [
b = temp[j]; 8R4qU!M
} Sk=N [hwU
} it,w^VU_]
} o0`q#>7!_b
j04/[V)
/** %h/! Y<%
* @param data MGybGbd
* @param l @a(oB.i
* @param i asz?p\k:bC
*/ }\Z5{OA
private void insertSort(int[] data, int start, int len) { 7cw]v"iv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KB+]eI-h
} o](.368+4
} m[8 @Unt
} /aOlYqM(>
} 9L"?wv
;BVDt
堆排序： } yq
euZI`*0
package org.rut.util.algorithm.support; -3vh!JMN
968^"T#
import org.rut.util.algorithm.SortUtil; zs8I
v<&v]!nF
/** sykFSPy`'
* @author treeroot @vAFfYU9<.
* @since 2006-2-2 bn-=fb(
* @version 1.0 sTOFw;v%
*/ hdj%|~Fj
public class HeapSort implements SortUtil.Sort{ CZ tiWZ
M/B/b<['
/* (non-Javadoc) 5i9Ub|!P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w-FHhf
*/ ]^'ZiyJX
public void sort(int[] data) { Q52bh'cuU
MaxHeap h=new MaxHeap(); Vp7b4n<
h.init(data); Fu##'#
for(int i=0;i h.remove(); -u~eZ?(!Ye
System.arraycopy(h.queue,1,data,0,data.length); /qXzOd
} ^Y 7U1I
,8VXA +'_
private static class MaxHeap{ yVYkuO
>76 |:Nq
void init(int[] data){ (8x gn
this.queue=new int[data.length+1]; ]!aUT&
for(int i=0;i queue[++size]=data; dz,+tR~
fixUp(size); a}yR p
} VDn:SGj5
} )7AM3%z1?
Efr3x{ j
private int size=0; 4Py3I9
D|TR!
private int[] queue; $W,zO|-
-'ZxN'*%
public int get() { V16%Ne
return queue[1]; 61,O%lV
} O6]u!NqG
]_#SAhOR)
public void remove() { gh61H:tkR
SortUtil.swap(queue,1,size--); <<<NXsH
fixDown(1); ?*+1~m>
} 7@a\*|K6
file://fixdown Wr#~GFg
private void fixDown(int k) { ?(Bl~?zD
int j; {aIZFe}B
while ((j = k << 1) <= size) { dEET}s\
if (j < size %26amp;%26amp; queue[j] j++; R@$+t:}
if (queue[k]>queue[j]) file://不用交换 k=|K|
break; JV%nH!Fs
SortUtil.swap(queue,j,k); zq=&4afOE
k = j; JWWInuH
} :D4];d>1
} 8]]@S"ZM,\
private void fixUp(int k) { 5Pqt_ZWy
while (k > 1) { O! (85rp/
int j = k >> 1; xT=ySa$|>
if (queue[j]>queue[k]) TrQm]9@
break; ^'YHJEK
SortUtil.swap(queue,j,k); r0uJ$/!
k = j; S}mm\<=1
} CjV7q y
} D!me%;
D2$^"
} 5p{25N_t
c/RT0xql*
} eA&t%
z}3di5+P
SortUtil： ^XNw$@&',
-;ER`Jqs,
package org.rut.util.algorithm; 9C=~1>S
b~9`]+
import org.rut.util.algorithm.support.BubbleSort; mF~ys{"t
import org.rut.util.algorithm.support.HeapSort; g/B\ObY
import org.rut.util.algorithm.support.ImprovedMergeSort; v^\JWPR/
import org.rut.util.algorithm.support.ImprovedQuickSort; DZ2Fl>7
import org.rut.util.algorithm.support.InsertSort; Iht'e8)gq
import org.rut.util.algorithm.support.MergeSort; O$U}d-Xnx
import org.rut.util.algorithm.support.QuickSort; UQnBqkE
import org.rut.util.algorithm.support.SelectionSort; jm+blB^%K
import org.rut.util.algorithm.support.ShellSort; Bs@:rhDi
AHWh}~Yi
/** X98#QR#m
* @author treeroot lJlhl7
* @since 2006-2-2 $':JI#
* @version 1.0 sX!3_'-
*/ Wt"ww~h`(
public class SortUtil { (H2ylMpQt
public final static int INSERT = 1; GI?PGAT
public final static int BUBBLE = 2; EoKo
public final static int SELECTION = 3; LS{bg.e
public final static int SHELL = 4; 0W_mCV
public final static int QUICK = 5; y,V6h*x2
public final static int IMPROVED_QUICK = 6; 9u?Eb~#$
public final static int MERGE = 7; 3? };
public final static int IMPROVED_MERGE = 8; jQ)L pjS1
public final static int HEAP = 9; U Q)!|@&
R~$hWu}}
public static void sort(int[] data) { &M$Bt} <
sort(data, IMPROVED_QUICK); L7<+LA)s0
} e|JIrOnc
private static String[] name={ e) ]RA?bF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pbPz$Y
}; aU4R+.M7@
brj[c>ID
private static Sort[] impl=new Sort[]{ aj?2jU~Pq
new InsertSort(), 8<Xq=*J+
new BubbleSort(), rykj2/O
new SelectionSort(), 8-A:k E
new ShellSort(), aDN.gMS
new QuickSort(), .(JE-upJ"
new ImprovedQuickSort(), hRa\1Jt>a
new MergeSort(), 27Cz1[oX
new ImprovedMergeSort(), D$QGLI9(
new HeapSort() ?P%|P
}; qg|Ox*_od"
[A|(A$jl
public static String toString(int algorithm){ MCM/=M'y
return name[algorithm-1]; O/(3 87=U
} k{_1r;
0u>yT?jP
public static void sort(int[] data, int algorithm) { |^?`Q.|c$
impl[algorithm-1].sort(data); <>VIDE
} (X*'y*:
R08&cd#$
public static interface Sort { p?}f|mQS)
public void sort(int[] data); z1kBNOr
} hI*`>9l
|y klT
public static void swap(int[] data, int i, int j) { 'y< t/qo
int temp = data; bBy'v/
data = data[j]; hH#lTye
data[j] = temp; pa>p%
} axOi5
} $y8mK|3.3u