[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; mr>dZ)
} P(aN6)D
int i1=l; >E9 k5
int i2=mid+1; YK>?;U+|
for(int cur=l;cur<=r;cur++){ }///k]_Sh
if(i1==mid+1) X+QoO=02LR
data[cur]=temp[i2++]; sFw;P`
else if(i2>r) g17 fge6%
data[cur]=temp[i1++]; O96%U$W
else if(temp[i1] data[cur]=temp[i1++]; }U@(S>,%
else 9k;%R5(
data[cur]=temp[i2++]; <-"[9 w
} w+gPU1|(r
} KJ cuZ."wX
4}NCdGD
} Qrw:Bva)
b<j*;n.
改进后的归并排序: 5M\bH'1
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package org.rut.util.algorithm.support; |:pBk:
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import org.rut.util.algorithm.SortUtil; LwcAF g|
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/** 7X<#
* @author treeroot Y'yGhpT~
* @since 2006-2-2 ;%Kh~
* @version 1.0 M8${&&[;
*/ t8.^YTI
public class ImprovedMergeSort implements SortUtil.Sort { Bdm05}c@u
~uu{ v')
private static final int THRESHOLD = 10; ^/)%s3
b\p2yJ\
/* mD7kOOMY
* (non-Javadoc) dy4~~~^A
* ^00C"58A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =>L2~>[
*/ !+(H(,gI
public void sort(int[] data) { =-]NAj\
int[] temp=new int[data.length]; aSIoq}c(
mergeSort(data,temp,0,data.length-1); h/]));p
} dg#w!etB
]v#T9QQN
private void mergeSort(int[] data, int[] temp, int l, int r) { Bo0f`EC I
int i, j, k; Z@0IvI
int mid = (l + r) / 2; ZhFlR*EQ
if (l == r) X'p%K/-m
return; Qn}M
if ((mid - l) >= THRESHOLD) UZ!It>
mergeSort(data, temp, l, mid); _8e0vi!~2
else VjJ}q*/3e
insertSort(data, l, mid - l + 1); Bh;N:{&^Eu
if ((r - mid) > THRESHOLD) {bNVNG^
mergeSort(data, temp, mid + 1, r); }(!3)k7*
else h059DiH
insertSort(data, mid + 1, r - mid); >dnDN3x
uOPLJ?%
for (i = l; i <= mid; i++) { 8aTo TA7JA
temp = data; \f'=
} kV4,45r
for (j = 1; j <= r - mid; j++) { "] ]aF1
temp[r - j + 1] = data[j + mid]; ~0rvrDDg
} 6L3i
int a = temp[l]; NXOcsdcZu
int b = temp[r]; ;)z+dd#3
for (i = l, j = r, k = l; k <= r; k++) { lT_dzO
if (a < b) { .9q`Tf
data[k] = temp[i++]; RO| }WD)
a = temp; +|qw>1J(
} else { PV-B<Y
data[k] = temp[j--]; =g?k`vp
b = temp[j]; 3*N0oc^m
} aX? tnDv
} W8M(@* T
} Z<#h$XUA
Lc0=5]D
/** ;Qidf}:
* @param data =lL)g"xX
* @param l Tr, zV
* @param i 3[<D"0#},
*/ pzb`M'Z?C
private void insertSort(int[] data, int start, int len) { aVp-Ps|r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZUS06#t}
} j-wKm_M#jX
} rW+}3] !D/
} + aWcK6
} Li9>RY+3
;<#=|eD2
堆排序： 0a:@DOzT
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package org.rut.util.algorithm.support; 4ULdf|oP"
c|X}[
import org.rut.util.algorithm.SortUtil; Q}#xfrprF
C)ic;!$Qhb
/** ~-'-<-
* @author treeroot L&&AK`Ur3l
* @since 2006-2-2 <GSp%r
* @version 1.0 _+}f@&"
*/ oo|Nu+
public class HeapSort implements SortUtil.Sort{ K+`deH_d
} wx(P3BHD
/* (non-Javadoc) Mg&<W#$K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DS;.)P"
*/ cyB2=,
public void sort(int[] data) { BzTzIo5
MaxHeap h=new MaxHeap(); ie7P^:T|+
h.init(data); Nt687
for(int i=0;i h.remove(); dg&GMo
System.arraycopy(h.queue,1,data,0,data.length); S2EV[K8#
} o0TB>DX$`
b{;LbHq+G
private static class MaxHeap{ $Km~x
x M{SFF
void init(int[] data){ 7{38g
this.queue=new int[data.length+1]; iyr<qtwK
for(int i=0;i queue[++size]=data; U "v=XK)!
fixUp(size); M|7][!<G!
} U5[r&Y D
} #v*3-) 8
dv?t;D@p!
private int size=0; }>_
l7U<]i GL
private int[] queue; i:H]Sb)<b
x^McUfdr|
public int get() { ol}}c6
return queue[1]; zIr4!|X
} G6s3\de#U
yUs/lI, Q
public void remove() { h;A~:}c,
SortUtil.swap(queue,1,size--); kb!W|l"PN
fixDown(1); %DKC/%
} er<_;"`1
file://fixdown |][PbN D
private void fixDown(int k) { A-u!{F
int j; g\H~Y@'{
while ((j = k << 1) <= size) { 2Hk21y\
if (j < size %26amp;%26amp; queue[j] j++; $F6GCM3Cx
if (queue[k]>queue[j]) file://不用交换 G`f|#-}
break; gi+FL_8CzU
SortUtil.swap(queue,j,k); !ZY1AhGZ
k = j; @]L$eOV_
} 3?TUt{3g
} JY%l1:}G3
private void fixUp(int k) { t-Ble
while (k > 1) { J)sOne
int j = k >> 1; AvB21~t&]
if (queue[j]>queue[k]) .e\PCf9v
break; lDVgW}o@
SortUtil.swap(queue,j,k); ^G "Qp8 "
k = j; 4@0Z<8Mo
} cL4Xh|NBp
} yO@@-)$[y
&D&U!3~(
} Rp>%umDyL
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} 1";s#Jq
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SortUtil： xPJ@!ks9
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package org.rut.util.algorithm; OX[r\
uEkGo5
import org.rut.util.algorithm.support.BubbleSort; ;aH3{TS
import org.rut.util.algorithm.support.HeapSort; 2#Qw
import org.rut.util.algorithm.support.ImprovedMergeSort; W+Ou%uv}S
import org.rut.util.algorithm.support.ImprovedQuickSort; :\^jIKvZ
import org.rut.util.algorithm.support.InsertSort; W>u{JgY
import org.rut.util.algorithm.support.MergeSort; sHQO*[[
import org.rut.util.algorithm.support.QuickSort; 9TEAM<b;
import org.rut.util.algorithm.support.SelectionSort; @B!gxW\C
import org.rut.util.algorithm.support.ShellSort; >^g\s]c[
.-1'#Z1T
/** 4}0Ry\ 6
* @author treeroot %0vWyU:K9
* @since 2006-2-2 Ac\e>N
* @version 1.0 r+tHVh
*/ [buLo*C4:
public class SortUtil { +kq+x6&
public final static int INSERT = 1; `2y?(BJp
public final static int BUBBLE = 2; ~6{U^3
public final static int SELECTION = 3; gCbS$Pw
public final static int SHELL = 4; sIRfC< /P
public final static int QUICK = 5; )GOio+{H
public final static int IMPROVED_QUICK = 6; )ib$*dmUP
public final static int MERGE = 7; QFFFxaeJg
public final static int IMPROVED_MERGE = 8; ^ZFK:|Ju
public final static int HEAP = 9; f,Am;:\|
s<5PsR
public static void sort(int[] data) { ViU5l*n;
sort(data, IMPROVED_QUICK); p9&gKIO_m
} [@@EE> y
private static String[] name={ <Vh}d/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yoM^6o^,D
}; M3eFG@,
bQdu=s[
private static Sort[] impl=new Sort[]{ Rpj{!Ia
new InsertSort(), N9~'\O$'7
new BubbleSort(), x#hSN|'"
new SelectionSort(), s\Ln
new ShellSort(), /Eu|Jg=I
new QuickSort(), >uFFTik
new ImprovedQuickSort(), whFJ]
new MergeSort(), K1p.{
new ImprovedMergeSort(), :mt<]Oy3
new HeapSort() i"mQ
}; sAnb
&d]@$4u$;
public static String toString(int algorithm){ wJu9.
return name[algorithm-1]; 8YQ7XB
} `chD*@76I
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public static void sort(int[] data, int algorithm) { [EK@f,iM
impl[algorithm-1].sort(data); 83VFBY2q
} R`,|08E
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public static interface Sort { yTf/]H]d
public void sort(int[] data); u5Mg
} uvi&! )x
g"\JiBb5
public static void swap(int[] data, int i, int j) { #X0Xc2}{f
int temp = data; g*!1S
data = data[j]; Bve',.xH
data[j] = temp; eV"Uv3
} *d31fBCk%
} ,:0!+1