[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; )2:U]d%pk
} Qv8 =CnuOT
int i1=l; R+Ug;r-[
int i2=mid+1; ^Q!A4qOQ
for(int cur=l;cur<=r;cur++){ &u(pBr8B
if(i1==mid+1) 8Qkwg]X
data[cur]=temp[i2++]; )R"UX:Q>
else if(i2>r) "VMb1Zhf
data[cur]=temp[i1++]; b.)jJLWv@
else if(temp[i1] data[cur]=temp[i1++]; :n?rk/F
else b~TTz`HZ
data[cur]=temp[i2++]; A[:(#iR5-E
} fvA167\
} pE.TG4
r8o^8.
} <anU#bEuQ
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改进后的归并排序: Nfmr5MU_
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package org.rut.util.algorithm.support; }rWg']
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import org.rut.util.algorithm.SortUtil; [Z!oVSCZD%
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/** "`* >co6r
* @author treeroot %e+*&Z',
* @since 2006-2-2 F$O$Y[
* @version 1.0 &NI\<C7_Gw
*/ }CrWmJu0
public class ImprovedMergeSort implements SortUtil.Sort { i=V2 /W}
jk%H+<FU`
private static final int THRESHOLD = 10; k<rJm P{
6O*lZNN
/* >.hDt9@4
* (non-Javadoc) M{YN^ Kk
* (/!zHq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !d95gq<=>
*/ \|Y_,fi
public void sort(int[] data) { 5wv7]F<
int[] temp=new int[data.length]; !'Hd:oD<
mergeSort(data,temp,0,data.length-1); =RofC9,
} mRC
6E_YUk?KW
private void mergeSort(int[] data, int[] temp, int l, int r) { qGP}
int i, j, k; I(Vg
int mid = (l + r) / 2; j%81q
if (l == r) 9N6 \Ou~
return; 9)4_@rf%
if ((mid - l) >= THRESHOLD) -<(RYMk*)
mergeSort(data, temp, l, mid); h)z2#qfc
else s&\krW&
insertSort(data, l, mid - l + 1); |vxmgX)
if ((r - mid) > THRESHOLD) nB4+*=$E+-
mergeSort(data, temp, mid + 1, r); #jPn7
else 5>~D3?IAd
insertSort(data, mid + 1, r - mid); ?Q"1zcX
?0lz!Nq'S
for (i = l; i <= mid; i++) { 9H+Q/Q*-a
temp = data; }|Bs|$q
} :b;`.`@KL_
for (j = 1; j <= r - mid; j++) { zqp>Xw
temp[r - j + 1] = data[j + mid]; 9d!mGnl
} }R_Rw:W
int a = temp[l]; "h8fTB\7S\
int b = temp[r]; !mUO/6Q hq
for (i = l, j = r, k = l; k <= r; k++) { A!R'/m'VG
if (a < b) { XcL%0%`
data[k] = temp[i++]; aF>&X-2
a = temp; o3h>)4
} else { Q2* ~9QkU
data[k] = temp[j--]; SEH[6W3
b = temp[j]; goJ'z|))
} g~76c.u-
} j@{dsS:6
} .-Dc%ap]
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/** >qd=lm <,
* @param data Q&/WVRD
* @param l rU1Ri
* @param i #G=AD/z
*/ K\.tR
private void insertSort(int[] data, int start, int len) { 5gb:,+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L<6nM ;d
} F&
} aP B4!3W
} {xh5s<uOj
} )mjGHq2
h67{qY[J[
堆排序： t=fP^bJ
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package org.rut.util.algorithm.support; @ 'U`a4
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import org.rut.util.algorithm.SortUtil; ]ZNFrpq
F@zTz54t
/** "{zqXM}:C
* @author treeroot U\M9sTqo
* @since 2006-2-2 oe!4ng[
* @version 1.0 d]N_<@tx9
*/ }c>vk
public class HeapSort implements SortUtil.Sort{ >P//]nn
jBl$r{L
/* (non-Javadoc) `7[!bCl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $9: @M.
*/ ew]G@66
public void sort(int[] data) { 7nP{a"4_
MaxHeap h=new MaxHeap(); /vu]ch
h.init(data); q+cD
for(int i=0;i h.remove(); (!YJ:,!so
System.arraycopy(h.queue,1,data,0,data.length); ef/43+F^x
} &>QxL d#
}>V=J aG
private static class MaxHeap{ O,S>6o)?
v5U'ky:
void init(int[] data){ Oqq'r"S
this.queue=new int[data.length+1]; ze21Uj1x*
for(int i=0;i queue[++size]=data; hMUUnr"8;i
fixUp(size); -= izu]Fb,
} $1Zr.ERL|(
} =%s6QFR
}w-M.
private int size=0; R~fk/T?
YHMJ5IM@.
private int[] queue; q03+FLEfC
# s7e/GdKb
public int get() { %~,Fe7#p
return queue[1]; )d2:r 07a
} 0Ng?U+6
&0fV;%N
public void remove() { yrl7
SortUtil.swap(queue,1,size--); e,lLHg
fixDown(1); dDD5OnWmJ
} A}&YK,$5ED
file://fixdown 4=;j.=>0X
private void fixDown(int k) { ~tZB1+%)
int j; oN%zpz;OR
while ((j = k << 1) <= size) { .yFO] r1aL
if (j < size %26amp;%26amp; queue[j] j++; E> $_ $'
if (queue[k]>queue[j]) file://不用交换 l-S0Gn/'X
break; |=![J?
SortUtil.swap(queue,j,k); sLXM$SMBh
k = j; USHQwn)%
} \sfc!5G
} '>n&3`r5
private void fixUp(int k) { hw*u.46
while (k > 1) { [Q J
int j = k >> 1; zufsmY4P
if (queue[j]>queue[k]) h.KgHMV`
break; y,6kL2DM
SortUtil.swap(queue,j,k); *[*q#b$j
k = j; }xi?vAaTl
} K<`W>2"
} _Hfpizm
5`gVziS!S
} ^u1Nbo
m^3j|'mG
} noEl+5uY
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SortUtil： )N607 Fa-
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package org.rut.util.algorithm; |@yYM-;6
;Q4,I[?%
import org.rut.util.algorithm.support.BubbleSort; aDxNAfP
import org.rut.util.algorithm.support.HeapSort; AXSip
import org.rut.util.algorithm.support.ImprovedMergeSort; YRr,{[e
import org.rut.util.algorithm.support.ImprovedQuickSort; 'mTY56Yq
import org.rut.util.algorithm.support.InsertSort; o?Cc
import org.rut.util.algorithm.support.MergeSort; 2N]8@a
import org.rut.util.algorithm.support.QuickSort; .Dl ?a>I
import org.rut.util.algorithm.support.SelectionSort; p]/[ji
import org.rut.util.algorithm.support.ShellSort; kWy@wPqms
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/** Y4swMN8Bq
* @author treeroot $`ptSR
* @since 2006-2-2 3S2Alx!6
* @version 1.0 #7}M\\$M
*/ y'I m/{9U
public class SortUtil { (_CvN=A
public final static int INSERT = 1; ^FBu|eAkE
public final static int BUBBLE = 2; Kg2Du'WQ^
public final static int SELECTION = 3; c00rq ~<K
public final static int SHELL = 4; =T&<z_L
public final static int QUICK = 5; _~ei1 G.R
public final static int IMPROVED_QUICK = 6; @G=7A;-pv0
public final static int MERGE = 7; sPeTW*HeR
public final static int IMPROVED_MERGE = 8; ?A_+G 5
public final static int HEAP = 9; y 5=rr3%v
@xa$two
public static void sort(int[] data) { T]tu#h{ a
sort(data, IMPROVED_QUICK); VwZ~ntk
} ;in-)`UC!
private static String[] name={ :yJ([
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cfa1"u""e
}; B@0#*I Rm
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private static Sort[] impl=new Sort[]{ "VSx?74q
new InsertSort(), Ak('4j!*}^
new BubbleSort(), [u2t1^#Ol
new SelectionSort(), {=mGXd`x?l
new ShellSort(), /2c(6h
new QuickSort(), C4.GtY8,d
new ImprovedQuickSort(), -WF((s;<#
new MergeSort(), l"nS+z
new ImprovedMergeSort(), a|oh Ad
new HeapSort() <!UnH6J.b
}; ]H}2|~c
4 l-UrnZ
public static String toString(int algorithm){ r hucBm
return name[algorithm-1]; { AYW C6Y
} U4K ZPk
z |~+0
public static void sort(int[] data, int algorithm) { 0;">ETh=
impl[algorithm-1].sort(data); #G F.M,O/h
} FjtS
aEIz,^3
public static interface Sort { 42"nbJ
public void sort(int[] data); a~_JTH4=t
} *PL&CDu=)
Y)pop:y t
public static void swap(int[] data, int i, int j) { ln=fq:
int temp = data; 1v`|mU}i,
data = data[j]; 5>0\=
data[j] = temp; nYZ6'Iwi'
} Xnjl {`
} W&|?8%"l]