[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; jA ?tDAx`
} Fa]fSqy@;
int i1=l; TUeW-'/1
int i2=mid+1; BPAz.K Q
for(int cur=l;cur<=r;cur++){ OE,uw2uaT
if(i1==mid+1) !_{2\&
data[cur]=temp[i2++]; 4}nsW}jCc
else if(i2>r) jn+NX)9
data[cur]=temp[i1++]; /0|niiI
else if(temp[i1] data[cur]=temp[i1++]; UPtWj8h
else W)rE_tw,|
data[cur]=temp[i2++]; z0ULB?*"
} u+7B-l=u*
} YLc 2:9
`V N $ S
} "]BefvE
4fe$0mye
改进后的归并排序: /($!("b
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package org.rut.util.algorithm.support; |E+tQQr%'
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import org.rut.util.algorithm.SortUtil; }Ip"j]h
"zJGYBen
/** >AcpJ|V
* @author treeroot F12tOSfu*
* @since 2006-2-2 QInow2/u
* @version 1.0 ]s lYr8m
*/ ~'/I[y4t
public class ImprovedMergeSort implements SortUtil.Sort { #L\t)W
rVLUT
private static final int THRESHOLD = 10; s(yVE
5gpqN)|)[
/* /$OX'L&b
* (non-Javadoc) !oXA^7Th6]
* pa0'\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F+e J9
*/ o!Vs{RRu}
public void sort(int[] data) { yK"OZ2Mv
int[] temp=new int[data.length]; >-0b@ +j
mergeSort(data,temp,0,data.length-1); I+ipTeB^
} ,z}wR::%
QC:/xP
private void mergeSort(int[] data, int[] temp, int l, int r) { \Yv<TzJ9
int i, j, k; W68d"J%>_
int mid = (l + r) / 2; A:"J&TbBx
if (l == r) G>hmVd
return; %]9 <a
if ((mid - l) >= THRESHOLD) %9|=\# G
mergeSort(data, temp, l, mid); A@/DGrZX
else G@Dw
insertSort(data, l, mid - l + 1); 0`X%&
if ((r - mid) > THRESHOLD) 1\d$2N"
mergeSort(data, temp, mid + 1, r); \FOX#|i)
else W'{q
insertSort(data, mid + 1, r - mid); /*GRE#7S
cK.T=7T
for (i = l; i <= mid; i++) { md[FtcY\
temp = data; CL(,Q8yG
} ^&t(O1.-
for (j = 1; j <= r - mid; j++) { Qi^MfHW
temp[r - j + 1] = data[j + mid]; Vy = fm
} SM:SxhrGt
int a = temp[l]; [woR9azC
int b = temp[r]; 0y4z`rzTn
for (i = l, j = r, k = l; k <= r; k++) { }z&P^p)R
if (a < b) { Y[8w0ve-g
data[k] = temp[i++]; J.x>*3<l
a = temp; OwGl&
} else { t/cjz/]
data[k] = temp[j--]; (sw1HR
b = temp[j]; \\jB@O
} %l@Q&)f8e
} sY,!Ir`/`
} ;_0)f
d#T8|#O"
/** P[{w23`4
* @param data JH!qGV1
* @param l _C?<re3*
* @param i V|NWJ7
*/ JbYv <
private void insertSort(int[] data, int start, int len) { [|{yr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d"78w-S
} mQ#@"9l%
} RIX0AE
} iUh_rX9A"
} Ms?V1
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堆排序： dJ`Fvj
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package org.rut.util.algorithm.support; XKp%7;
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import org.rut.util.algorithm.SortUtil; uVqJl{e\
ovCk:Vz
/** ,TU!W|($
* @author treeroot uMF\3T(x4
* @since 2006-2-2 1$idF
* @version 1.0 B@*BcE?
*/ %dZD;Vhg
public class HeapSort implements SortUtil.Sort{ :EyH'v
pooi8" G
/* (non-Javadoc) :^kP?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <C6/R]x#
*/ lg;Y}?P
public void sort(int[] data) { `<t{NJ&f
MaxHeap h=new MaxHeap(); 'O`jV0aa'
h.init(data); X.s?=6}g
for(int i=0;i h.remove(); (?R
System.arraycopy(h.queue,1,data,0,data.length); ~U8#Iq1
} ;-=y}DK
nvD"_.KrJ
private static class MaxHeap{ 1L'[DKb'
?w# >Cs(
void init(int[] data){ I(Nsm3L
this.queue=new int[data.length+1]; lGPC)Hu{`
for(int i=0;i queue[++size]=data; S^)r,cC
fixUp(size); <E@7CG.=
} GMU<$x8o
} /+RNPQO O
u7j-uVG
private int size=0; s~/]nz]"J
aJMh>
private int[] queue; W _b$E =
(uOW5,e7
public int get() { O)Nt"k7 b
return queue[1]; fokT)nf~^8
} |k&.1NkZ
-7ct+3"J
public void remove() { /_,~dt
SortUtil.swap(queue,1,size--); j %TYyL-
fixDown(1); ^yK94U;<Gy
} .EloBP
file://fixdown 5?;'26iC
private void fixDown(int k) { +nuv?QB/
int j; 6WfyP@f
while ((j = k << 1) <= size) { dGIu0\J\$
if (j < size %26amp;%26amp; queue[j] j++; <zZAVGb4I
if (queue[k]>queue[j]) file://不用交换 CX':nai
break; Tc:W=\<
SortUtil.swap(queue,j,k); ,_rarU)[J
k = j; yN3Tk}{V
} 77i |a]Kd
} no?)GQ
private void fixUp(int k) { pw>AQ
while (k > 1) { S$+ v?Y`)
int j = k >> 1; Ynz^M{9)K
if (queue[j]>queue[k]) 10#!{].#x
break; Y1k/ngH
SortUtil.swap(queue,j,k); {]<D"x;
k = j; #]lUJ &M}e
} &K>]!yn
} X""'}X|O
oTI*mGR1Z
} TP{a*ke^5,
+"3eh1q[
} XOqpys
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SortUtil： }0 <x4|=
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package org.rut.util.algorithm; 2zFdKs,
6S6nE%.3
import org.rut.util.algorithm.support.BubbleSort; t C6c4j
import org.rut.util.algorithm.support.HeapSort; 1xguG7
import org.rut.util.algorithm.support.ImprovedMergeSort; !-.-!hBN
import org.rut.util.algorithm.support.ImprovedQuickSort; v9inBBC q
import org.rut.util.algorithm.support.InsertSort; _D,8`na>K
import org.rut.util.algorithm.support.MergeSort; tB_V%qH
import org.rut.util.algorithm.support.QuickSort; :m&`bq
import org.rut.util.algorithm.support.SelectionSort; ~7 `x9MUc
import org.rut.util.algorithm.support.ShellSort; {6%uNT>|
>t D-kzN
/** ik$wS#1+L
* @author treeroot $,aU"'D
* @since 2006-2-2 =R>Sxaq
* @version 1.0 |Y'$+[TE
*/ p1?}"bHk
public class SortUtil { ,6M-xSDs
public final static int INSERT = 1; ,j_{IL690
public final static int BUBBLE = 2; &us8,x6yg
public final static int SELECTION = 3; 21o_9=[^
public final static int SHELL = 4; G0Wd"AV+
public final static int QUICK = 5; zl: u@!'
public final static int IMPROVED_QUICK = 6; \Flq8S/t^
public final static int MERGE = 7; LpmspIPvf
public final static int IMPROVED_MERGE = 8; 9d{W/t?NH
public final static int HEAP = 9; =k$d8g ez
Q%eBm_r;
public static void sort(int[] data) { tjd"05"@:
sort(data, IMPROVED_QUICK); vj^UF(X
} ZH0f32K
private static String[] name={ 'nT#3/rL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ro<!n>H
}; eGTK^p
19N:9;Ixz
private static Sort[] impl=new Sort[]{ xJ"Zg]d{
new InsertSort(), /ruf1?\,R
new BubbleSort(), 6~!YEuA
new SelectionSort(), 4X\*kF%
new ShellSort(), ]Ea7b
new QuickSort(), JxLH]1b
new ImprovedQuickSort(), XS!ZTb>[
new MergeSort(), 6pLwwZD
new ImprovedMergeSort(), :mJM=FeJ
new HeapSort() }oN(nPxv9
}; T^nX+;:|
I2W2B3D` c
public static String toString(int algorithm){ Vks,3$
return name[algorithm-1]; NDg]s2T
} J<BdIKCma
\ yOZ&qU
public static void sort(int[] data, int algorithm) { 4O`h%`M
impl[algorithm-1].sort(data); @[FFYVru
} ^LNc
>|'6J!Op
public static interface Sort { #KK(Z\;
public void sort(int[] data); 4`UT_LcI
} ; Q 6:#
N|~&Q!A&
public static void swap(int[] data, int i, int j) { k9n
int temp = data; \6'A^cE/PX
data = data[j]; E{6}'FG+A
data[j] = temp; u]2k%TUY
} [.Y=~)7FB
} ho20>vw#