[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; @LSh=o+
} u[oV Jvc
int i1=l; T7Y}v,+-
int i2=mid+1; ]>Gi_20*.
for(int cur=l;cur<=r;cur++){ hJD3G |E
if(i1==mid+1) o)]O
data[cur]=temp[i2++]; B2'TRXIm1U
else if(i2>r) x+;y0`oL
data[cur]=temp[i1++]; =N8_S$nx(
else if(temp[i1] data[cur]=temp[i1++]; FOsxId[f9
else jA[Ir3
data[cur]=temp[i2++]; Jb^{o+s53
} 29VX-45
} C"%B>e
(|rf>=B+H
} /oLY\>pD
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改进后的归并排序: %u_dxpx
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package org.rut.util.algorithm.support; /y6f~F
cza_LO(
import org.rut.util.algorithm.SortUtil; 2eA.04F
bN03}&I
/** D.|r [c
* @author treeroot !pkIaCxs
* @since 2006-2-2 S^|U"
* @version 1.0 z Tz_"NI
*/ }/,Rp/+7]
public class ImprovedMergeSort implements SortUtil.Sort { R!lug;u#
jzGK(%sw"
private static final int THRESHOLD = 10; -sZb+2tDa
Li"+`
/* W&&|T;P<J
* (non-Javadoc) 8lGM>(:o
* E*wG5]at
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #z<#oC5
*/ EtaKo}!A}
public void sort(int[] data) { MGxkqy?
int[] temp=new int[data.length]; OP"_I!t
mergeSort(data,temp,0,data.length-1); yT5OFD|T
} yU4mS;GX
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private void mergeSort(int[] data, int[] temp, int l, int r) { Zq<j}vVJ
int i, j, k; RA[%8Rh)
int mid = (l + r) / 2; |WEl5bNc3
if (l == r) Uzc p
return; %KkC1.yu<
if ((mid - l) >= THRESHOLD) au/LoO#6Ro
mergeSort(data, temp, l, mid); VJT /9O)Z|
else Y_n3O@,
insertSort(data, l, mid - l + 1); VB#&`]rdo
if ((r - mid) > THRESHOLD) R! On
mergeSort(data, temp, mid + 1, r); EP>Lh7E9n
else ('UTjV
insertSort(data, mid + 1, r - mid); FfrC/"N
#D|%r-:"
for (i = l; i <= mid; i++) { DR:DXJc
temp = data; BRskxyL&,
} ;1{=t!z=
for (j = 1; j <= r - mid; j++) { :z&kbG
temp[r - j + 1] = data[j + mid]; ir>h3Zk
} II|;_j
int a = temp[l]; HLG5SS7
int b = temp[r]; \w>Rmf'|
for (i = l, j = r, k = l; k <= r; k++) { 1K<}
if (a < b) { HKI\i)c
data[k] = temp[i++]; _SOwiz
a = temp; `O%nDry
} else { b;5j awG
data[k] = temp[j--]; i*m;kWu,
b = temp[j]; e&U$;sS`
} R@s7s%y=
} ipg`8*My
} EU%v |]
cz/cY:o)
/** b1jDbiH&
* @param data k ,+,,W
* @param l PnInsf%;
* @param i vmrs(k "d#
*/ {*TB }Xsr,
private void insertSort(int[] data, int start, int len) { r|DIf28MIq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C=@4U}
} (=;'>*L(
} +xO3<u
} oH?:(S(
} qHdUnW
, QWus"5H
堆排序： W02z}"#
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package org.rut.util.algorithm.support; #$-?[c$>
oYTLC@98}
import org.rut.util.algorithm.SortUtil; ~%g,Uypi
,d38TN
/** zIu/!aw
* @author treeroot *jWh4F,
* @since 2006-2-2 f$kbb6juL
* @version 1.0 G'#u!<(^h
*/ fRLA;1va
public class HeapSort implements SortUtil.Sort{ =xRD %Z
l!Xj UnRF
/* (non-Javadoc) +~aIT=i3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f^lcw
*/ rTR"\u7&H
public void sort(int[] data) { Z_4%Oi
MaxHeap h=new MaxHeap(); *AW v
h.init(data); fW+"Kuw
for(int i=0;i h.remove(); {d;z3AB
System.arraycopy(h.queue,1,data,0,data.length); a{Y|`*7y
} 3en67l
l5Ko9CG
private static class MaxHeap{ aF+Lam(
[J}eNprg
void init(int[] data){ gN:F50
this.queue=new int[data.length+1]; 7x>^ip"7
for(int i=0;i queue[++size]=data; Q2r[^Z
fixUp(size); ;*j K!
} Z'y&11
} {}k3nJfE
k?&GL!?
private int size=0; EFh^C.S8
XX%K_p`&Z
private int[] queue; u*P@Nuy6
dhLR#m30T
public int get() { gjN'D!'E1D
return queue[1]; ^@RvCJ+
} !Md6Lh%-w
}EkL[H!
public void remove() { J( XDwt
SortUtil.swap(queue,1,size--); jQ3dLctn
fixDown(1); M(K7xx+G
} .\ fpjQW
file://fixdown ?{aJ#w
private void fixDown(int k) { rC_1f3A
int j; pgh(~[
while ((j = k << 1) <= size) { >4Tk#+%Jj
if (j < size %26amp;%26amp; queue[j] j++; DGb1_2ZQ
if (queue[k]>queue[j]) file://不用交换 tJ K58m$
break; lW-h @
SortUtil.swap(queue,j,k); I8)D
k = j; {m~)~/z?
} (XmmbAbVom
} b/ \EN)
private void fixUp(int k) { ;#9?3Os
while (k > 1) { fv+ET:T%
int j = k >> 1; u%:`r*r
if (queue[j]>queue[k]) U!r8}@
break; XK3O,XM
SortUtil.swap(queue,j,k); ^O@eyP
k = j; B!x#|vGXL
} v9Ii8{ca|
} pMHl<HH
tB~#;:g
} ,m?V3xvq
s.Z{mnD6
} xCXsyZ2h
tyW}=xs
SortUtil： uuwJ-
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package org.rut.util.algorithm; !"qT2<A
[niFJIsc
import org.rut.util.algorithm.support.BubbleSort; R3_OCM_*
import org.rut.util.algorithm.support.HeapSort; IS(F_< .
import org.rut.util.algorithm.support.ImprovedMergeSort; QR"+fzOL
import org.rut.util.algorithm.support.ImprovedQuickSort; 9G SpDc
import org.rut.util.algorithm.support.InsertSort; 3\j`g
import org.rut.util.algorithm.support.MergeSort; 4Xa]yA =
import org.rut.util.algorithm.support.QuickSort; '=Zm[P,
import org.rut.util.algorithm.support.SelectionSort; ?<3 d Fb
import org.rut.util.algorithm.support.ShellSort; 9AhA"+?
=-:%~ng
/** !;*flr`/
* @author treeroot b_F1?:#
* @since 2006-2-2 vkhPE(f
* @version 1.0 PaQ lQ#
*/ grgs r_)[
public class SortUtil { _d3Z~cH
public final static int INSERT = 1; 6}N`YOJ.
public final static int BUBBLE = 2; L5`k3ap|
public final static int SELECTION = 3; K 'l-6JY-
public final static int SHELL = 4; Sxc)~y
public final static int QUICK = 5; %\48hSe
public final static int IMPROVED_QUICK = 6; TCRTC0_}k
public final static int MERGE = 7; V;MmPNP|
public final static int IMPROVED_MERGE = 8; Bh=t%#y|`
public final static int HEAP = 9; B<r0y
|X:`o;Uma
public static void sort(int[] data) { uXFI7vV6P
sort(data, IMPROVED_QUICK); /mz.HCs
} Ro9:kEG$
private static String[] name={ 6Y]P7j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,.ivdg(/
}; oOND]>
^P~,bO&H.Z
private static Sort[] impl=new Sort[]{ _|12BVq
new InsertSort(), 8e>B>'nH
new BubbleSort(), jXf@JxQ
new SelectionSort(), )e3w-es~4
new ShellSort(), DmuQE~DV
new QuickSort(), p P@q `
new ImprovedQuickSort(), !q,'k2=b,
new MergeSort(), "Tser*i )
new ImprovedMergeSort(), 2@Yu:|d4U
new HeapSort() >v@3]a i
}; 1T|")D
`B3-#!2X
public static String toString(int algorithm){ Izu____
return name[algorithm-1]; 4w ,&#L
} m85ZcyW1T
O-V]I0
public static void sort(int[] data, int algorithm) { Yh1nXkA!V
impl[algorithm-1].sort(data); Q<AOc\oO
} ~HGSA(
SF;\*]["f
public static interface Sort { zW#5 /*@
public void sort(int[] data); fn 'n'X|
} ]vf0f,F
^$'z#ZN1
public static void swap(int[] data, int i, int j) { z4BU}`;b3t
int temp = data; MnFrQC
data = data[j]; hu0z 36
data[j] = temp; _J,rql@nG<
} .qohHJ&
} na $MR3@e