[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; z;#DX15Rj
} 2!7)7wlj0
int i1=l; {`Jr$*;
int i2=mid+1; IO*}N"
for(int cur=l;cur<=r;cur++){ W$I^Ej}>$
if(i1==mid+1) OrZ=-9"
data[cur]=temp[i2++]; ]WO0v`xh
else if(i2>r) " 0:&x n8L
data[cur]=temp[i1++]; n B5:X
else if(temp[i1] data[cur]=temp[i1++]; b%TS37`^[
else ['*{f(AI
data[cur]=temp[i2++]; gq'}LcV
} ;VLv2J*
} e\[z Q 2Z3
24}?GO
} S~ff<A>f
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改进后的归并排序: us_o{
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package org.rut.util.algorithm.support; xYgG
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import org.rut.util.algorithm.SortUtil; g}vOp3^
`2B,+ytW8
/** QXQ'QEG
* @author treeroot e1EFZ,EcaO
* @since 2006-2-2 kPt] [1jo
* @version 1.0 y,i ~w |4
*/ 5 aT>8@$Z^
public class ImprovedMergeSort implements SortUtil.Sort { o`]o(OP
ZSBa+3;z
private static final int THRESHOLD = 10; x=/`W^t2
l\?HeVk^
/* kvdiDo
* (non-Javadoc) o~_wx
* B;3lF;3`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |SO?UIWp
*/ N`G* h^YQ
public void sort(int[] data) { }%&hxhR^t3
int[] temp=new int[data.length]; 5yh:P3 /
mergeSort(data,temp,0,data.length-1); zE~{}\J
} R.Plfm06Ue
}k`-n32)|
private void mergeSort(int[] data, int[] temp, int l, int r) { 5`!Bj0Uf
int i, j, k; cJ}J4?
int mid = (l + r) / 2; -=tf)
if (l == r) )r9lT*z
return; \hm;p
if ((mid - l) >= THRESHOLD) ']bpsn
mergeSort(data, temp, l, mid); !zu YO3:
else {c7ZA%T~R
insertSort(data, l, mid - l + 1); J$]-)`[G&
if ((r - mid) > THRESHOLD) XL`*Tbx
mergeSort(data, temp, mid + 1, r); 4P>[]~S
else e(5:XHe
insertSort(data, mid + 1, r - mid); .tg2HKD_lW
#[Z1W8e
for (i = l; i <= mid; i++) { (P+TOu-y\
temp = data; sQ)D.9\~
} 8RA]h?$$J
for (j = 1; j <= r - mid; j++) { H}Jdnu|ko
temp[r - j + 1] = data[j + mid]; &gP/<!#
} *an^ 0
int a = temp[l]; L,(H(GeX
int b = temp[r]; <wIz8V
for (i = l, j = r, k = l; k <= r; k++) { x)wlp{rLf
if (a < b) { 5-=&4R\k
data[k] = temp[i++]; (}1:]D{)@V
a = temp; :RxWHh3O
} else { K4r"Q*h
data[k] = temp[j--]; JGJy_.C
b = temp[j]; ?4[IIX-
} NSsLuM=.
} 8)NQt$lWp
} C1x"q9|\`
mMz^I7$
/** ;Sc}e/WJj
* @param data *_qW;l7
* @param l DE$HF*WY
* @param i 5t,W'a_
*/ o\#C#NiT
private void insertSort(int[] data, int start, int len) { jMpV c E#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >dr34=(
} ']x`d
} g }%$VUSA
} bzl-|+!yB
} {mkD{2)KQ
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堆排序： pPa3byWf
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package org.rut.util.algorithm.support; VbwB<nQl
bXx2]E227
import org.rut.util.algorithm.SortUtil; ,4OH9-Q1
%6%QE'D
/** (]Pr[xB
* @author treeroot /^2&@P7
* @since 2006-2-2 wT taj08D
* @version 1.0 A#&,S4Wi|
*/ h&k*i
public class HeapSort implements SortUtil.Sort{ IwTAM9n
" iz'x-wy
/* (non-Javadoc) ;b-d2R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0-=PP@W
*/ 6AA"JX
public void sort(int[] data) { ++d%D9*V<
MaxHeap h=new MaxHeap(); g5\EVcHkz
h.init(data); ~8j4IO(
for(int i=0;i h.remove(); .#4;em%7
System.arraycopy(h.queue,1,data,0,data.length); 'a^'f]"
} FxkxV GZ"
6>hW.aq}
private static class MaxHeap{ HRG2sv T4t
U#X6KRZ~g
void init(int[] data){ G2,9$8qE
this.queue=new int[data.length+1]; H2cY},
for(int i=0;i queue[++size]=data; q_R^Q>ZIe
fixUp(size); BM }{};p6
} }OJ,<!v2pc
} t=6[FK
KkCA*GS
private int size=0; T2%{pcdV/
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private int[] queue; av!'UZP
]9 ArT$
public int get() { D2@J4;UW*W
return queue[1]; 8M_p'AR\,y
} u> @Yoyc
KiaQ^[/q
public void remove() { [8Yoz1(smA
SortUtil.swap(queue,1,size--); V+Tu{fFF7E
fixDown(1); \nKpJ9!
} m,qMRcDF
file://fixdown 0&W*U{0F\
private void fixDown(int k) { e*Y>+*2y
int j; ^T.icSxP
while ((j = k << 1) <= size) { 8Q*477=I
if (j < size %26amp;%26amp; queue[j] j++; Y~fa=R{W
if (queue[k]>queue[j]) file://不用交换 ,t!K? Y
break; j@98UZ{g\
SortUtil.swap(queue,j,k); mZgYR~
k = j; F s{}bQyQ
} &3:U&}I
} v?)u1-V0
private void fixUp(int k) { Or2J
while (k > 1) { Ibbpy++d[
int j = k >> 1; Z7Gl^4zn
if (queue[j]>queue[k]) 5RUhrE
break; 5TB==Fj ?
SortUtil.swap(queue,j,k); i+Fk
k = j; ^]_5oFRIj
} FL/395 <:
} Bm\OH#
sT;:V
} !ot$Q
mD]^a;U[X
} _ft)e3Gf
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SortUtil： R3<2Z0lqy
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package org.rut.util.algorithm; Bt?.8H6Y
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import org.rut.util.algorithm.support.BubbleSort; @&4s)&-F
import org.rut.util.algorithm.support.HeapSort; hj*Fn
import org.rut.util.algorithm.support.ImprovedMergeSort; W4ygJL7 6
import org.rut.util.algorithm.support.ImprovedQuickSort; _XP3|E;I/
import org.rut.util.algorithm.support.InsertSort; c9<&+
import org.rut.util.algorithm.support.MergeSort; %(v<aEQtt
import org.rut.util.algorithm.support.QuickSort; B+pJWl8u
import org.rut.util.algorithm.support.SelectionSort; "KhVS
import org.rut.util.algorithm.support.ShellSort; QN'v]z
I~f8+DE)
/** )tB1jcI;
* @author treeroot :{tj5P!S
* @since 2006-2-2 OpT0V]k^"9
* @version 1.0 L[LgQ7esQ
*/ 6Y-sc*5
public class SortUtil { ;=ci7IT'
public final static int INSERT = 1; ~p'DPg4
public final static int BUBBLE = 2; J]=2] oI2
public final static int SELECTION = 3; w*-1*XNA
public final static int SHELL = 4; puPYM"
public final static int QUICK = 5; P:3%#d~q
public final static int IMPROVED_QUICK = 6; ]B'H(o R<|
public final static int MERGE = 7; V1= (^{p8
public final static int IMPROVED_MERGE = 8; G1`H H&
public final static int HEAP = 9; Dn9AOi!
_;x7vRWmN
public static void sort(int[] data) { jh*aD=y
sort(data, IMPROVED_QUICK); U(t_uc5q
} R/UL4R,)^
private static String[] name={ Dqu][~oQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?xgrr7
}; Q x]zz4jD
$[NC$*N7
private static Sort[] impl=new Sort[]{ faJ>,^V#
new InsertSort(), wzka4J{
new BubbleSort(), oD=6D9c?
new SelectionSort(), -Jj"JN.
new ShellSort(), HcKZmL.wp
new QuickSort(), y,OwO4+y\
new ImprovedQuickSort(), +mqz)-x
new MergeSort(), wV,l }Xb-
new ImprovedMergeSort(), nGdEJ
new HeapSort() 6x_tX
}; UJX=lh.o
z12c9k%s
public static String toString(int algorithm){ R>YDn|cWI
return name[algorithm-1]; .eSMI!Y=
} Q5N;MpJ-
p7YfOUo k
public static void sort(int[] data, int algorithm) { O [81nlhS0
impl[algorithm-1].sort(data); YVEin1]
} $7 08\!
>cEB,@~
public static interface Sort { xlH?J;$
public void sort(int[] data); hR]AUH
} )= ,Lfj8x
#O |Z\|n
public static void swap(int[] data, int i, int j) { hSvA dT]m
int temp = data; 8#S}.|"?F
data = data[j]; xTJ-v/t3<
data[j] = temp; ``:AF:
} %Ny`d49&
} l5m5H,`