[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; \UPjf]&
} e7^mmm
int i1=l; ~xkeuU
int i2=mid+1; )eUh=eW
for(int cur=l;cur<=r;cur++){ S0zD"T
if(i1==mid+1) /rK}?U
data[cur]=temp[i2++]; (?n=33}Ci
else if(i2>r) 8EW_V$>R
data[cur]=temp[i1++]; f.D?sHAn
else if(temp[i1] data[cur]=temp[i1++]; MqW7cjg
else TrlZ9?3#D
data[cur]=temp[i2++]; mWoAO@}Y
} o} J&E{Tk
} "|EM;o
]D?"aX'q>
} ")SFi^]
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改进后的归并排序: KI)M JG:t
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package org.rut.util.algorithm.support; 7?#J~.d5
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import org.rut.util.algorithm.SortUtil; #eoome2Q
]O]4z,n
/** Px4)>/ z,
* @author treeroot i6^twK)j
* @since 2006-2-2 }JF13beU
* @version 1.0 3 }duG/
*/ \nXtH}9ZF
public class ImprovedMergeSort implements SortUtil.Sort { =$u! 59_dE
<CS(c|7
private static final int THRESHOLD = 10; l{5IUuUi
"sS}N%!
/* 1Ir21un
* (non-Javadoc) k Z?=AXu
* F^WP<0C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B^1>PE
*/ Vx$\hcG
public void sort(int[] data) { WJQvB=D&
int[] temp=new int[data.length]; +9M^7/}H
mergeSort(data,temp,0,data.length-1); bWH&P/>
} `ZU($!(
G? ])o5
private void mergeSort(int[] data, int[] temp, int l, int r) { v&9y4\j
int i, j, k; 8L,5Q9 $
int mid = (l + r) / 2; MV5_L3M
if (l == r) J=\HO8E6>
return; qyZ" %Kz
if ((mid - l) >= THRESHOLD) |t^E~HLm,
mergeSort(data, temp, l, mid); .k#U]M
else x.]i}mt
insertSort(data, l, mid - l + 1); Q8T]\6)m
if ((r - mid) > THRESHOLD) 1#C4;3i,
mergeSort(data, temp, mid + 1, r); >tYm+coS
else ohRjvJ'v|
insertSort(data, mid + 1, r - mid); ),0g~'I~D
d?ex,f.
for (i = l; i <= mid; i++) { gR&Q3jlIV
temp = data; SzAJ2:qhl
} 7S-ys+
for (j = 1; j <= r - mid; j++) { MDnKX?Y
temp[r - j + 1] = data[j + mid]; v_<rNc,z-s
} { d=^}-^
int a = temp[l]; iJ-23_D
int b = temp[r]; #H)vK"hF
for (i = l, j = r, k = l; k <= r; k++) { 02f~En}>6
if (a < b) { 4QH3fTv
data[k] = temp[i++]; !02`t4Zc-
a = temp; hW%TM3l}
} else { t#V!8EpBg
data[k] = temp[j--]; (]Z_UTT
b = temp[j]; /sUYU(3
} sGi"rg#
} S ^"y4-2
} )SaGH3~*C
?ME6+Z\
/** [glLre^
* @param data O@tU.5*$5
* @param l lsgh#x
* @param i ],>@";9u"
*/ ?~l6K(*2
private void insertSort(int[] data, int start, int len) { }{,^@xdyW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FTX=Wyr
} &4{KV.
} :nh_k4S@v
} ?}Z1bH
} F5LuSy+v
l>2E (Y|
堆排序： $~~Jw]
p2Z?T}fa}&
package org.rut.util.algorithm.support; "An,Q82oHf
f~t:L,\,
import org.rut.util.algorithm.SortUtil; ^?-:'<4q$
$I!XSz"/e
/** _ q(ko/T
* @author treeroot j:^#rFD4?
* @since 2006-2-2 9`T)@Uj2n
* @version 1.0 mf A{3
*/ tGD6AI1"I
public class HeapSort implements SortUtil.Sort{ i{Uc6R6
J; 3{3
/* (non-Javadoc) O%Scjm-^X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y_'Ub{w
*/ j5QuAU8
public void sort(int[] data) { .sxcCrQE
MaxHeap h=new MaxHeap(); O)C\vF#
h.init(data); e h&IPU S
for(int i=0;i h.remove(); !SC`D])l
System.arraycopy(h.queue,1,data,0,data.length); bo,_&4?
} szb_*)k
i#&z2h-b
private static class MaxHeap{ >] qc-{>&
&)YQvTzs
void init(int[] data){ 5<iV2Hx
this.queue=new int[data.length+1]; )mI05
for(int i=0;i queue[++size]=data; }Q)#[#e
fixUp(size); OtY`@\hy
} aFc1|.Nm
} .4_o>D
A|CmlAW~^
private int size=0; *]. 7dec/
Kh"?%ZIa
private int[] queue; N@;?CKU
-<c=US
public int get() { jTf@l?|
return queue[1]; :lX!\(E2
} H;D>|q
Qwz}B
public void remove() { v&Ii^?CvO
SortUtil.swap(queue,1,size--); f& 0M*o,)
fixDown(1); qsF<!'m7`
} wJg1Y0nh
file://fixdown t#yk->,
private void fixDown(int k) { O1rvaOlr
int j; NWP5If|'X
while ((j = k << 1) <= size) { 214Ml0/%
if (j < size %26amp;%26amp; queue[j] j++; B5gj_^
if (queue[k]>queue[j]) file://不用交换 jLy
break; ,368d9,rDz
SortUtil.swap(queue,j,k); #mlS}~n
k = j; Hh%I0#
} Xk:OL,c
} _G_Cj{w
private void fixUp(int k) { lackB2J9 A
while (k > 1) { ?42<J%p
int j = k >> 1; zuP B6W^
if (queue[j]>queue[k]) *aXF5S
break; >@BnV{ d
SortUtil.swap(queue,j,k); ,V'o4]H
k = j; ,4hJT
} he#J|p
} H12Fw'2
h-g+g#*
} 2^XGGB0
7;u e
} 4)E_0.C
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SortUtil： rI{=WPI&WU
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package org.rut.util.algorithm; z^KJ*E
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import org.rut.util.algorithm.support.BubbleSort; qsL)}sC^8
import org.rut.util.algorithm.support.HeapSort; Gk967pC
import org.rut.util.algorithm.support.ImprovedMergeSort; gep;{G}
import org.rut.util.algorithm.support.ImprovedQuickSort; *v?`<)P#
import org.rut.util.algorithm.support.InsertSort; K7$x<5+)
import org.rut.util.algorithm.support.MergeSort; yZd +^QN
import org.rut.util.algorithm.support.QuickSort; zFfoqb#*g
import org.rut.util.algorithm.support.SelectionSort; R= a|Blp
import org.rut.util.algorithm.support.ShellSort; liEPCWl&
&vHoRY
/** w|3z;-#Q;
* @author treeroot L%">iQOG#
* @since 2006-2-2 yh^!'!I6u[
* @version 1.0 }p=Jm)y
*/ BW-`t-,E;
public class SortUtil { tv>>l%
public final static int INSERT = 1; CF&NFSti^
public final static int BUBBLE = 2; dL:-Y.?0M
public final static int SELECTION = 3; 85lCj-cs
public final static int SHELL = 4; M=.:,wRm
public final static int QUICK = 5; QpZ:gM_
public final static int IMPROVED_QUICK = 6; :d3bt~b'
public final static int MERGE = 7; soPLA68
public final static int IMPROVED_MERGE = 8; ]&?Y~"{cD
public final static int HEAP = 9; 3WN`y8l
~0?mBy!-O
public static void sort(int[] data) { Q)"C&)`l
sort(data, IMPROVED_QUICK); aF8fqu\
} k $M]3}$U
private static String[] name={ Yj%U >),8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "b?v?V0%C
}; e}mD]O}
K )[]fm
private static Sort[] impl=new Sort[]{ "ZHW2l Mf
new InsertSort(), _\=`6`b)
new BubbleSort(), Gn&-X]Rrl
new SelectionSort(), uC.K<jD%
new ShellSort(), -g)9R%>-
new QuickSort(), pqUCqo!m\
new ImprovedQuickSort(), `J]fcE%T0R
new MergeSort(), a-y+@#;2_
new ImprovedMergeSort(), 33jovK2
new HeapSort() >Wh}f3C
}; "mX\&%i6\p
~SQ?BoCI[
public static String toString(int algorithm){ DQMHOd7g
return name[algorithm-1]; cQG +$0(
} >tTj[cMJl
& +4gSr
public static void sort(int[] data, int algorithm) { whonDG4WP
impl[algorithm-1].sort(data); KiRUvWqa
} ]'5;|xc9$/
:!/gk8F|dI
public static interface Sort { 5'0xz.)!
public void sort(int[] data); X_qf"|i
} |\_^B
$\b$}wy*
public static void swap(int[] data, int i, int j) { "nm FzN
int temp = data; d\%WgH
data = data[j]; "8'@3$>R=
data[j] = temp; 79nG|Yj|\
} ~UyV<
} 6Z#\CixG