[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; $RaN@& Wm
} )|F|\6:ne
int i1=l; +T+@g8S
int i2=mid+1; h4?x_"V"
for(int cur=l;cur<=r;cur++){ FRBu8WW0L
if(i1==mid+1) n{;j
data[cur]=temp[i2++]; 'x!\pE-
else if(i2>r) afEa@et'
data[cur]=temp[i1++]; _IDZ.\'>$
else if(temp[i1] data[cur]=temp[i1++]; pN%&`]Wev
else N4!`iS Y
data[cur]=temp[i2++]; &v{Ehkr*
} zH8E,)
} fd\RS1[
|^pev2g
} @X2*O9
NB"S,\M0
改进后的归并排序: du3f'=q6|
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package org.rut.util.algorithm.support; uepyH
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import org.rut.util.algorithm.SortUtil; '$K E=Jy
tMIYVHGy
/** !'7fOP-J]
* @author treeroot k_al*iM>H
* @since 2006-2-2 `FP?9R6Y
* @version 1.0 E9HMhUe
*/ \N>-+r
public class ImprovedMergeSort implements SortUtil.Sort { +eM${JyXH
rH+OXGoB
private static final int THRESHOLD = 10; Lsmcj{1d
-Mt 5< s
/* hvd}l8
* (non-Javadoc) NR{wq|"
* 'Wonz<{'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K"}fD;3
*/ yVd^A2
public void sort(int[] data) { 5Wt){rG0Z
int[] temp=new int[data.length]; yzA05npTl
mergeSort(data,temp,0,data.length-1); OG,P"sv
} I$n=>s
[M_{~1xX
private void mergeSort(int[] data, int[] temp, int l, int r) { e%4?-{(
int i, j, k; AKNx~!%2
int mid = (l + r) / 2; 1SQATUV
if (l == r) T5BZD +Ta
return; X|M!Nt0'
if ((mid - l) >= THRESHOLD) YeX*IZX8
mergeSort(data, temp, l, mid); +Q*`kg'
else g;IlS*Ld
insertSort(data, l, mid - l + 1); ^?69|,
if ((r - mid) > THRESHOLD) g8),$:Uw
mergeSort(data, temp, mid + 1, r); 85{m+1O~
else &v\F ah U
insertSort(data, mid + 1, r - mid); W+XWS,(
r );R/)&
for (i = l; i <= mid; i++) { A5?"
temp = data; 6Z/`p~e
} LHAlXo;
for (j = 1; j <= r - mid; j++) { .J#'k+>
temp[r - j + 1] = data[j + mid]; E$d3+``
} WKf<% E$
int a = temp[l]; JuRoeq.
int b = temp[r]; Vs>Pv$kW
for (i = l, j = r, k = l; k <= r; k++) { gjF5~ `
if (a < b) { +bjy#=
data[k] = temp[i++]; >&L|oq7$
a = temp; N,ht<l\
} else { oL4W>b )
data[k] = temp[j--]; *2X6;~
b = temp[j]; N&8TG
} vccWe7rh
} +,Dc0VC?
} !\]^c
w$gvgz
/** wAMg"ImJ
* @param data T.q2tC[bR
* @param l a|ftl&uk
* @param i -luQbGcT3
*/ <Ij!x`MS+
private void insertSort(int[] data, int start, int len) { +^I0>\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vwR_2u
} 5<?Ah+1
} 337.' |ZE
} ROO*/OOd
} ?7{U=1gb$
5Z=4%P*I
堆排序： N_t,n^i9>*
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package org.rut.util.algorithm.support; OhF55,[
DF%d/a{]
import org.rut.util.algorithm.SortUtil; 3)OZf{D[
#86N !&x
/** %cNN<x8
* @author treeroot ;5a$OM
* @since 2006-2-2 mrGV{{.
* @version 1.0 -15e
*/ s8j |>R|k
public class HeapSort implements SortUtil.Sort{ o7y<Zd`Bj
J?4{#p
/* (non-Javadoc) H7O~So*N5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =4ygbk
*/ *MJm:
public void sort(int[] data) { v|?@k^Ms
MaxHeap h=new MaxHeap(); 'Kelq$dn#
h.init(data); Iil2R}1
for(int i=0;i h.remove(); WR+j?Fcf
System.arraycopy(h.queue,1,data,0,data.length); !0 7jr%-~
} d[9,J?'OQ
G,8mFH
private static class MaxHeap{ YMGy-]!o
o$_0Qs$
void init(int[] data){ OT#@\/>
this.queue=new int[data.length+1]; w,~*ead
for(int i=0;i queue[++size]=data; /%$Zm^8c
fixUp(size); /"m s
} YV>a 3
} +in)(a.
M-WSdG[AJ
private int size=0; O7.V>7Y9H
UlXm4\@
private int[] queue; 9~p;iiKGG
EPo)7<|>
public int get() { AvL /gt:
return queue[1]; %$BRQ-O
} 7uBx
j }~?&yB
public void remove() { {uDW<u_!
SortUtil.swap(queue,1,size--); 8lQ/cGAc
fixDown(1); hzD)yf
} a%go[_w
file://fixdown |N,^*xP(6
private void fixDown(int k) { 1eXMMZ/?
int j; 3=S|U,
while ((j = k << 1) <= size) { vgW(l2,@
if (j < size %26amp;%26amp; queue[j] j++; ra^</o/
if (queue[k]>queue[j]) file://不用交换 2BY|Cp4R
break; b"g^Jm! j
SortUtil.swap(queue,j,k); G<Z}G8FW^
k = j; lL}6IZ5sb
} >=k7#av
} a%q,P @8
private void fixUp(int k) { %p7 ?\>
while (k > 1) { +V=<vT
int j = k >> 1; d`\SX(C
if (queue[j]>queue[k]) U$:^^Zt`B
break; I0-1Hr
SortUtil.swap(queue,j,k); L5hF-Ek! 3
k = j; %Tp9GGt
} [bLKjD
} vbJ<|#|r-
A-x^JC=
} 81RuNs]
aru2H6
} g5BL"Dn
cMK|t;" 3
SortUtil： DVQr7tQf
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package org.rut.util.algorithm; YB*)&@yx
5{H)r
import org.rut.util.algorithm.support.BubbleSort; wXNng(M7
import org.rut.util.algorithm.support.HeapSort; )St0}?I~
import org.rut.util.algorithm.support.ImprovedMergeSort; ]H`wE_2tu
import org.rut.util.algorithm.support.ImprovedQuickSort; `(W"wC
import org.rut.util.algorithm.support.InsertSort; F"Dr(V
import org.rut.util.algorithm.support.MergeSort; 8%4;'[UV
import org.rut.util.algorithm.support.QuickSort; G>~/
import org.rut.util.algorithm.support.SelectionSort; 1I;q@g0
import org.rut.util.algorithm.support.ShellSort; !&%KJS6p4
pI@71~|R
/** l6zAMyau5
* @author treeroot EXdX%T\
* @since 2006-2-2 ^%oH LsY9
* @version 1.0 h(WlJCln
*/ <n_?$ TJ
public class SortUtil { a-*sm~u
public final static int INSERT = 1; su0K#*P&I
public final static int BUBBLE = 2; \:'GAByy
public final static int SELECTION = 3; j,rc9
public final static int SHELL = 4; c{'Z.mut
public final static int QUICK = 5; 1dD%a91
public final static int IMPROVED_QUICK = 6; MpKXC
public final static int MERGE = 7; cg )(L;
public final static int IMPROVED_MERGE = 8; #m#IBRD:
public final static int HEAP = 9; &UDbH* !4=
G-CL \G\n
public static void sort(int[] data) { D(z#)oDr
sort(data, IMPROVED_QUICK); U& GPede
} mmQC9nZ
private static String[] name={ 4n#u?)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H Qj,0#J)
}; y^r'4zN'
X&Oo[Z
private static Sort[] impl=new Sort[]{ u`EK^\R
new InsertSort(), azZ|T{S
new BubbleSort(), MdX4Rp'
new SelectionSort(), yCz"~c
new ShellSort(), Rd(8j+Q?ps
new QuickSort(), [KUkv
new ImprovedQuickSort(), `&I6=,YLp
new MergeSort(), ~ESw* 6s9
new ImprovedMergeSort(), j1Ys8k%$l
new HeapSort() =Vh]{y~$
}; OL1xxzo
$7X;FmlG&
public static String toString(int algorithm){ *Y1s4FXu2
return name[algorithm-1]; do`'K3a"
} }51QUFhL0
^uo,LTq+
public static void sort(int[] data, int algorithm) { Q3=X#FQ
impl[algorithm-1].sort(data); mAH7;u<
} Gb2|e.z
hzbvR~rn
public static interface Sort { '3XOU.
public void sort(int[] data); l[ko)%7V
} A@M2(?w4
g=KK PSK
public static void swap(int[] data, int i, int j) { H#F"n"~$
int temp = data; qY&(O`?m&
data = data[j]; '>[ZfT
data[j] = temp; TaF*ZT2
} n4?;!p<F
} }?b\/l<