[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; {!!df.h
} !5,>[^y3
int i1=l; |^fubQs;2
int i2=mid+1; ql"&E{u?
for(int cur=l;cur<=r;cur++){ gc(Gc vdB\
if(i1==mid+1) ]0v;;PfVl6
data[cur]=temp[i2++]; ^b|Z<oF
else if(i2>r) H$'|hUwds%
data[cur]=temp[i1++]; U\aP
else if(temp[i1] data[cur]=temp[i1++]; =k.:XblEe[
else EdGA#i3
data[cur]=temp[i2++]; sF9{(Us
} +&hhj~I.
} <0lXJqd
aAM!;3j]B`
} F6>K FU8
.*XELP=BT
改进后的归并排序: EUBJnf:q
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package org.rut.util.algorithm.support; WP7RX|7
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import org.rut.util.algorithm.SortUtil; vByt_X
t^_0w[
/** V{!fag
* @author treeroot #yNSQd
* @since 2006-2-2 Br/qOO:n$}
* @version 1.0 6oTWW@
*/ {g8uMt\4
public class ImprovedMergeSort implements SortUtil.Sort { kk|7{83O
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private static final int THRESHOLD = 10; ,RmXZnWY
h>ZNPP8N
/* 9%fd\o@X
* (non-Javadoc) oCtg{*vp
* $cl[Qcw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;]*V6!6RR
*/ wQ1_Q8:Z
public void sort(int[] data) { U@t"o3E
int[] temp=new int[data.length]; $DPMi9,7^
mergeSort(data,temp,0,data.length-1); /|7@rH([{
} tW<i;2 l
EY3x o-H
private void mergeSort(int[] data, int[] temp, int l, int r) { E :gS*tsY
int i, j, k; w+A:]SU
int mid = (l + r) / 2; %v}SJEXFp
if (l == r) 0e./yPTT
return; 2_S%vA<L
if ((mid - l) >= THRESHOLD) 2MT_5j5[N
mergeSort(data, temp, l, mid); $db]b
else 1D2Uomd(
insertSort(data, l, mid - l + 1); $;O-1# ]
if ((r - mid) > THRESHOLD) #h,7dz.d
mergeSort(data, temp, mid + 1, r); nP]tc
else X;2I' Kg
insertSort(data, mid + 1, r - mid); IZ){xI
99QMMup
for (i = l; i <= mid; i++) { !LGnh
temp = data; ku2gFO
} s|40v@M
for (j = 1; j <= r - mid; j++) { |W't-}yf
temp[r - j + 1] = data[j + mid]; Wp2W:JX:
} @|I:A
int a = temp[l]; R$>]7-N}
int b = temp[r]; @ P:b\WCI
for (i = l, j = r, k = l; k <= r; k++) { 0[A4k:
if (a < b) { {;:QY1QT
data[k] = temp[i++]; 48}L!m @
a = temp; cb36~{
} else { ZD$W>'m{F
data[k] = temp[j--]; NxOiT#YH
b = temp[j]; l'yX_`*Iq
} :+ASZE.
} U2Uf69R
} 7CKpt.Sz6
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/** 8(AI|"A"-
* @param data |aAu4
* @param l oAnNdo
* @param i ^Rel-=Z$B
*/ ^{ Kj{M22
private void insertSort(int[] data, int start, int len) { rTJ='<hIy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ` u|8WK:
} b*;zdGX.A9
} Fe:M'.
} Cx N]fo
} W|~Jl7hs8Q
4[\$3t.L
堆排序： / 7i>0J]
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package org.rut.util.algorithm.support; $ 12mS
;Avz%2#c`
import org.rut.util.algorithm.SortUtil; YwbRzY-#F
d]3c44kkK{
/** Yg @&@S]
* @author treeroot m=saUhI*9
* @since 2006-2-2 XwZ~pY ~
* @version 1.0 M-#OPj*
*/ Lg;b17
public class HeapSort implements SortUtil.Sort{ YN=dLr([<
UU7E+4O&
/* (non-Javadoc) "-y2En
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cpIFjb>u{
*/ p3m!Iota
public void sort(int[] data) { 7g* "AEk
MaxHeap h=new MaxHeap(); @Feusprs
h.init(data); b 8vyJb,K
for(int i=0;i h.remove(); -dj9(~?^
System.arraycopy(h.queue,1,data,0,data.length); 5hhiP2q
} /*V:Lh
p"xti+2,
private static class MaxHeap{ o{W4@:Ib
R*"31&3le4
void init(int[] data){ Qkk3>{I
this.queue=new int[data.length+1]; +*W9*gl
for(int i=0;i queue[++size]=data; 3 s@6pI
fixUp(size); ;~A-32;Y4
} ^#6"d+lp
} S!LLC{
|b BA0.yS
private int size=0; 4qd =]i
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private int[] queue; #NoY}*
$0kuR!U.N
public int get() { qdM=}lbc
return queue[1]; gs xT
} Q3@MRR^tY
X0QY:?
public void remove() { !!{!T;)l
SortUtil.swap(queue,1,size--); f1Z
fixDown(1); LTn@OhC
} nV[0O8p2Md
file://fixdown : ~RY
private void fixDown(int k) { {6y@;Fd
int j; @;6I94Bp
while ((j = k << 1) <= size) { #5Q?Q~E@
if (j < size %26amp;%26amp; queue[j] j++; "M-zBBY]
if (queue[k]>queue[j]) file://不用交换 Hm>7|!
break; yLC5S3^1\"
SortUtil.swap(queue,j,k); &J]|pf3m
k = j; 46yq F
} [Iwb7a0p
} m L#%H(
private void fixUp(int k) { xr;:gz!h
while (k > 1) { ""Ub^:ucD
int j = k >> 1; 8C[W;&Y=
if (queue[j]>queue[k]) &N+,{7.
break; ?k|}\l[X1
SortUtil.swap(queue,j,k); D2,2Yy5y
k = j; NcuZw?
} H'2J!/V
} ,qj1"e
n#US4&uT4A
} 3 L:s5
~.:9~(2;
} Tz`O+fx&
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SortUtil： J~e%EjN5e
T#o?@;
package org.rut.util.algorithm; o+wG69
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import org.rut.util.algorithm.support.BubbleSort; ?k 4|;DD
import org.rut.util.algorithm.support.HeapSort; Iu)76Y@=5=
import org.rut.util.algorithm.support.ImprovedMergeSort; M%3P@GRg
import org.rut.util.algorithm.support.ImprovedQuickSort; &8!~H<S
import org.rut.util.algorithm.support.InsertSort; &rc]3! B
import org.rut.util.algorithm.support.MergeSort; ]* #k|>Fl
import org.rut.util.algorithm.support.QuickSort; Np.] W(
import org.rut.util.algorithm.support.SelectionSort; v^;p]_c~2
import org.rut.util.algorithm.support.ShellSort; T?DX|?2X
'j#J1xwJ
/** Au=9<WB%H
* @author treeroot Q#h*C ZT
* @since 2006-2-2 `U.VfQR:
* @version 1.0 u%s@B1j
*/ y8HwyU>
public class SortUtil { K3;lst>4
public final static int INSERT = 1; .`ND
public final static int BUBBLE = 2; QE#Ar8tU
public final static int SELECTION = 3; G $F3dx.I
public final static int SHELL = 4; San=E@3}v!
public final static int QUICK = 5; #A:+|{H"
public final static int IMPROVED_QUICK = 6; ]N& Y25oT5
public final static int MERGE = 7; #GlQwk3
public final static int IMPROVED_MERGE = 8; 5n1aRA1
public final static int HEAP = 9; ZCcKY6b
.{=|N8*py8
public static void sort(int[] data) { 5PRS|R7
sort(data, IMPROVED_QUICK); |_} LMkU)
} ,Fv8&tR
private static String[] name={ _MI8P/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }|Ao@UvH
}; 4t]YHLBS
<mk'n6B
private static Sort[] impl=new Sort[]{ VEc^Ap1?'
new InsertSort(), 17..
new BubbleSort(), W ZAkp|R
new SelectionSort(), 'g@Yra&09
new ShellSort(), @[=K`n:n_
new QuickSort(), (v@)nv]U
new ImprovedQuickSort(), zK_+UT
new MergeSort(), q!OB?03n
new ImprovedMergeSort(), 1Z$` }a
new HeapSort() K<g<xW*X
}; Ofm?`SE*|
xh90qm
public static String toString(int algorithm){ >QcIrq%=
return name[algorithm-1]; Vzmw%f)_+
} 7<Yf
O/N@Gz[g%
public static void sort(int[] data, int algorithm) { A><q-`bw
impl[algorithm-1].sort(data); HT% =o}y
} nF)XZB0F
*}@zxFe+
public static interface Sort { 01_*^iCf5
public void sort(int[] data); CD"D^\z
} 89kxRH\IhG
;Pd nE~
public static void swap(int[] data, int i, int j) { &hSABtr}
int temp = data; )*CDufRFz
data = data[j]; [dXpz^Co
data[j] = temp; ^tr?y??k
} C-:lM1
} HO`N]AMw