[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; *v?`<)P#
} YW-usvl&
int i1=l; H!vax)%-\
int i2=mid+1; s.EI`*xylY
for(int cur=l;cur<=r;cur++){ #XK2Ien)Z
if(i1==mid+1) ?xK8#
data[cur]=temp[i2++]; sPd Gw~{
else if(i2>r) fz;iOjr>
data[cur]=temp[i1++]; TPVVck-T8
else if(temp[i1] data[cur]=temp[i1++]; M]<?k]_p
else UsgK
data[cur]=temp[i2++]; ^*S ,xP
} KgV3j]d
} =5aDM\L$&
tzZ63@cm
} DvME1]7)
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改进后的归并排序: aGK?x1_
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package org.rut.util.algorithm.support; 0fc/wfv<
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import org.rut.util.algorithm.SortUtil; rL/H2[d
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/** ^L0d/,ik
* @author treeroot o5xAav"+>
* @since 2006-2-2 )64@2~4y
* @version 1.0 S2n39 3
*/ `L:CA5sBud
public class ImprovedMergeSort implements SortUtil.Sort { ()tp>
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private static final int THRESHOLD = 10; I[b}4M6E
&-s'BT[PGq
/* whonDG4WP
* (non-Javadoc) `IOs-%s
* _C.BFE_p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m#ZO`W
*/ b k|m4|
public void sort(int[] data) { ]"+95*B
int[] temp=new int[data.length]; wg ^sGKN
mergeSort(data,temp,0,data.length-1); 'jmTXWq*
} ]DZE%
y+!+ D[x
private void mergeSort(int[] data, int[] temp, int l, int r) { )v]/B+
int i, j, k; BQBeo&n6
int mid = (l + r) / 2; "~=mG--I
if (l == r) Ib|Rf;J~-
return; Q s.pGi0W
if ((mid - l) >= THRESHOLD) DvPlV q~
mergeSort(data, temp, l, mid); cKN$ =gd
else tBNoI
insertSort(data, l, mid - l + 1); _nD$b={g
if ((r - mid) > THRESHOLD) tyfTU5"x
mergeSort(data, temp, mid + 1, r); eFBeJZuE|
else V~S0hqW[
insertSort(data, mid + 1, r - mid); Gq_-Val]"
\I["2C]3M
for (i = l; i <= mid; i++) { l_EM8pL,f
temp = data; <cZGxff01
} $KUos+%
for (j = 1; j <= r - mid; j++) { UJ0<%^f
temp[r - j + 1] = data[j + mid]; 48jVRo
} 3l[McZ
int a = temp[l]; WJNl5^
int b = temp[r]; cZH-"
for (i = l, j = r, k = l; k <= r; k++) { |l&vkRrN
if (a < b) { jx.[#6e
data[k] = temp[i++]; U7doU'V/
a = temp; CqHK%M
} else { .fN"@l
data[k] = temp[j--]; 5nTY ?<x`k
b = temp[j]; F6o_b4l
} ^zEwA
} (Fynok
} E Q4KV
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/** YoN*:jB<M
* @param data T21ky>8E
* @param l D'L'#/hK
* @param i 9R;/*$
*/ K+Z+wA?
private void insertSort(int[] data, int start, int len) { :ml2.vP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u5 {JQO
} i<H wTmm$
} h Ggx
} Oy<5>2^P
} @HRC\OG
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堆排序： CT KG9 T
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package org.rut.util.algorithm.support; [q_`X~3
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import org.rut.util.algorithm.SortUtil; yu6`66h)
)I^2k4Cg"
/** ;<$H)`*
* @author treeroot "6R 5+
* @since 2006-2-2 V?P,&c?84
* @version 1.0 {NPuu?&
*/ %r-V2)
public class HeapSort implements SortUtil.Sort{ /,MJq#@K
sp7*_&'J
/* (non-Javadoc) UK$ms~H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q\GDrdA
*/ 2u"7T_"2D
public void sort(int[] data) { wO:Sg=,
MaxHeap h=new MaxHeap(); V7Z4T6j4
h.init(data); cooUE<a
for(int i=0;i h.remove(); [6)UhS8
System.arraycopy(h.queue,1,data,0,data.length); xXY.AoO6
} Q~MC7-n>
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private static class MaxHeap{ /^$UhX9v
sK"9fU
void init(int[] data){ UWZa|I~:J
this.queue=new int[data.length+1]; N7b1.]<
for(int i=0;i queue[++size]=data; +vNZW@_$D
fixUp(size); 9prU+9
} YXU|h
} zW}[+el}
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private int size=0; >Jw6l0z
l akp
private int[] queue; `/"nTB
!Oj)B1gc6&
public int get() { X; 5Jb
return queue[1]; )jCo%P/
} < AI;6/
aZet0?Qr
public void remove() { }C /]
SortUtil.swap(queue,1,size--); B-*E:O0y
fixDown(1); /({;0I*!i
} Y7GF$}%UL
file://fixdown nx:KoB"ny
private void fixDown(int k) { (f_g7B2&y
int j; -ZW3
while ((j = k << 1) <= size) { ;' nL:\
if (j < size %26amp;%26amp; queue[j] j++; tu>{
if (queue[k]>queue[j]) file://不用交换 0G <hn8>
break; wNNB;n`l
SortUtil.swap(queue,j,k); x|0:P sE
k = j; Bi~:>X\[^6
} Z,c,G2D
} ++}\v9Er
private void fixUp(int k) { 1/ZR*fa
while (k > 1) { ~:lKS;PRuK
int j = k >> 1; IN7<@OS7
if (queue[j]>queue[k]) >Z Ke
break; aV`&L,Q)7E
SortUtil.swap(queue,j,k); Te{ *6-gO3
k = j; 9Bdt(}0A
} 02JoA+
} kax\h
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} `Zz uo16
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} G{x[uE2X&f
@!Hr|k|
SortUtil： yg;_.4TpIO
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package org.rut.util.algorithm; la$%H<,7
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import org.rut.util.algorithm.support.BubbleSort; u>.y:>
import org.rut.util.algorithm.support.HeapSort; C+K=[
import org.rut.util.algorithm.support.ImprovedMergeSort; 0{^H]Y
import org.rut.util.algorithm.support.ImprovedQuickSort; /.V0ag'G
import org.rut.util.algorithm.support.InsertSort; 7ODaX.t->
import org.rut.util.algorithm.support.MergeSort; BRbV7&
import org.rut.util.algorithm.support.QuickSort; %do1i W
import org.rut.util.algorithm.support.SelectionSort; F6S~$<
import org.rut.util.algorithm.support.ShellSort; U3#dT2U
>O]s&34
/** {.k)2{
* @author treeroot $E(XjuS
* @since 2006-2-2 .tF|YP==
* @version 1.0 80ZnM%/}
*/ 0y%L-:/c|
public class SortUtil { 6ri#Lw
public final static int INSERT = 1; 7w58L:)B.
public final static int BUBBLE = 2; rOl6lQW
public final static int SELECTION = 3; S7n"3.k
public final static int SHELL = 4; IS]{}Y\3H
public final static int QUICK = 5; _MYx%Z
public final static int IMPROVED_QUICK = 6; QLbMPS
public final static int MERGE = 7; 8&}~'4[b[$
public final static int IMPROVED_MERGE = 8; qeaA&(|5
public final static int HEAP = 9; 0H=9@
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public static void sort(int[] data) { zTCP)x
sort(data, IMPROVED_QUICK); MV+i{]
} -G ?%QG`v
private static String[] name={ K6pw8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l+ T,2sd
}; E`p'L!z
\~"#ld(x7
private static Sort[] impl=new Sort[]{ t]m!ee8*X<
new InsertSort(), ER|!KtCSM
new BubbleSort(), 85>S"%_
new SelectionSort(), JmWR{du
new ShellSort(), {-*\w-~G
new QuickSort(), rveVCTbC
new ImprovedQuickSort(), R "E<8w
new MergeSort(), ]XrE
new ImprovedMergeSort(), /GsrGX8
new HeapSort() z Bf;fi
}; \ sf!
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public static String toString(int algorithm){ ]Ti$ztJ
return name[algorithm-1]; S|2VP8xY9
} U6i~A9;
d)*(KhYie@
public static void sort(int[] data, int algorithm) { +rQg7a}
impl[algorithm-1].sort(data); r%!FmS<
} |(%AM*n
$y6rvQ 2>S
public static interface Sort { sQ(1/"gb
public void sort(int[] data); }=pOiILvD
} 92(~'5Qr
T{ nQjYb?
public static void swap(int[] data, int i, int j) { OPJgIU%
int temp = data; pYGYy'%A'
data = data[j]; 7ti<
data[j] = temp; jlRS:$|R0
} -RCv7U`
} x(yX0 ,P/7