[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; \#F>R,
} E, oR.B
int i1=l; ^_W] @m2
int i2=mid+1; $)6M@S
for(int cur=l;cur<=r;cur++){ 4sC)hAx&f
if(i1==mid+1) 5Ux=5a
data[cur]=temp[i2++]; -e0?1.A$
else if(i2>r) l701$>>
data[cur]=temp[i1++]; 7=qvu&{
else if(temp[i1] data[cur]=temp[i1++]; 2|NQ5OA0
else \zOsq5}
data[cur]=temp[i2++]; N-45LS@
} ' hdLQ\J
} @,LU!#y(
9eR";Wm])
} 8;,|z%rS"
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改进后的归并排序: n{M-t@r7
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package org.rut.util.algorithm.support; J2Qt!-
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import org.rut.util.algorithm.SortUtil; lc]cs D
7c6- o"A
/** ^)aj,U[
* @author treeroot 0}'/3Q
* @since 2006-2-2 a=6@} l1<
* @version 1.0 _!w69>Nj
*/ b.9[Vf_G
public class ImprovedMergeSort implements SortUtil.Sort { #wkSru&LS
b S'dXP
private static final int THRESHOLD = 10; ^SM5oK
UVW4KUxR
/* NW&2ca
* (non-Javadoc) D@]/%;
* "EE(O9q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V=YDqof
*/ <vb7X
public void sort(int[] data) { [*5hx_4%B
int[] temp=new int[data.length]; cxx8I
mergeSort(data,temp,0,data.length-1); @CoUFdbz
} +G,_|C2J
bXqTc2>=
private void mergeSort(int[] data, int[] temp, int l, int r) { &MB1'~Q,hq
int i, j, k; #nmh=G?\Sm
int mid = (l + r) / 2; 8>xd
if (l == r) pOhjq#}
return; `P$X`;SwE
if ((mid - l) >= THRESHOLD) +x~p&,w?
mergeSort(data, temp, l, mid); >\3N#S"PF
else ~ftR:F|9
insertSort(data, l, mid - l + 1); -M4VC^_
if ((r - mid) > THRESHOLD) ~(=5`9
mergeSort(data, temp, mid + 1, r); ='-/JH~
else y'z9Ya
insertSort(data, mid + 1, r - mid); /"^XrVi-
$I<\Yuy-M9
for (i = l; i <= mid; i++) { kv2 H3O
temp = data; c6iFha;db
} _x$\E
for (j = 1; j <= r - mid; j++) { W*,$0 t
temp[r - j + 1] = data[j + mid]; `BaJ >%|
} Kk|)N3AV:
int a = temp[l]; z f>(Y7M
int b = temp[r]; VJ1rU mO~
for (i = l, j = r, k = l; k <= r; k++) { (nYGN$qC9
if (a < b) { @l&{ j
data[k] = temp[i++]; H;[?8h(
a = temp; OM`Ws5W}f
} else { ^b^buCYw
data[k] = temp[j--]; PWO5R]
b = temp[j]; 6_:KFqc W
} _<l)4A3rS
} ~NO7@muw
} p<y\^a
J0o,ZH9
/** 8v=t-GJW
* @param data _:Jma
* @param l Sw>,Q-32
* @param i aY DM)b}
*/ H|'n|\{lt
private void insertSort(int[] data, int start, int len) { N(O*"1b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^+kymZ
} omT^jh
} c_aj-`BKp
} #IJ6pg>K
} R~;8v1>K
6QNZ/Ox:
堆排序： <S12=<c?'
`1#Z9&bO
package org.rut.util.algorithm.support; o :j'd
@ *5+ZAF
import org.rut.util.algorithm.SortUtil; |EY1$qItid
=<AG}by![
/** ~ cI`$kJ
* @author treeroot WE+Szg(4x
* @since 2006-2-2 $^YHyfh
* @version 1.0 ?uW} XAi
*/ 6.a|w}C`
public class HeapSort implements SortUtil.Sort{ vtc%MG1
J?1Eh14KZ
/* (non-Javadoc) AdzdYZiM_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fVi[mH0=+
*/ n-1
public void sort(int[] data) { n'1LNi
MaxHeap h=new MaxHeap(); .sb0|3&
h.init(data); lk=[Xo
for(int i=0;i h.remove(); =6=l.qyYK
System.arraycopy(h.queue,1,data,0,data.length); Rhw+~gd*F
} %H3iX^}*
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private static class MaxHeap{ 3~LNz8Z*
X<f4X"y
void init(int[] data){ sXY{g0%
this.queue=new int[data.length+1]; OD?y
for(int i=0;i queue[++size]=data; V5 Gy|X
fixUp(size); 4Vd[cRh2
} HaRx(p0
} Vw`%|x"Xz
yvnvIy
private int size=0; g3Ul'QJ
nk;+L
private int[] queue; K1o&(;l8G
xFA`sAucr
public int get() { fe}RmnAC
return queue[1]; kc2 8Q2
} ; NO#/
PH?<)Wj9i
public void remove() { ^}<]sjmk
SortUtil.swap(queue,1,size--); g9IIC5
fixDown(1); q35=_'\W
} <1`MjP*w
file://fixdown &7Xsn^opku
private void fixDown(int k) { xX8c>p
int j; MYVb !
while ((j = k << 1) <= size) { zv^+8h7k
if (j < size %26amp;%26amp; queue[j] j++; .73sY5hdTN
if (queue[k]>queue[j]) file://不用交换 yz)Nco]
break; [lzH%0 V
SortUtil.swap(queue,j,k); "Q{7X[$$^
k = j; bvT$/(7
} upq3)t_
} .mxc~
private void fixUp(int k) { \t? ;p-+ta
while (k > 1) { x@|10GC#:
int j = k >> 1; 8/~@3-9EK
if (queue[j]>queue[k]) T ^/\Rr
break; ;h#Q!M&e#
SortUtil.swap(queue,j,k); DP!8c
k = j; BM87f:d
} ho!qXS
} eGWwPSIp
iZ(JwY
} ^xr &E
,,?XGx
} &C#?&AQ
B.);Ju
SortUtil： V]Uc@7S/
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package org.rut.util.algorithm; [5GzY`/m
<B+ WM
import org.rut.util.algorithm.support.BubbleSort; tNAmA
import org.rut.util.algorithm.support.HeapSort; >=3oe.$)
import org.rut.util.algorithm.support.ImprovedMergeSort; q%XjJ -s:
import org.rut.util.algorithm.support.ImprovedQuickSort; |WgFLF~k
import org.rut.util.algorithm.support.InsertSort; yEVnG` 1
import org.rut.util.algorithm.support.MergeSort; GMpg+rK
import org.rut.util.algorithm.support.QuickSort; s|R`$+'{
import org.rut.util.algorithm.support.SelectionSort; k7 Ne(4P
import org.rut.util.algorithm.support.ShellSort; gj }Vnv1[
.8wF> 8
/** XFi9qL^
* @author treeroot 5K=>x<
* @since 2006-2-2 @2+'s;mUV
* @version 1.0 (62Sc]
*/ "rpP
public class SortUtil { )t,efg
public final static int INSERT = 1; NQN?CBFQ
public final static int BUBBLE = 2; QjTs$#eMW
public final static int SELECTION = 3; `b_n\pf]
public final static int SHELL = 4; jTqEV(
public final static int QUICK = 5; *(sv5c!0M8
public final static int IMPROVED_QUICK = 6; Y*S(uqM
public final static int MERGE = 7; Ls&-8
public final static int IMPROVED_MERGE = 8; 5&]a8p{
public final static int HEAP = 9; _V3}F1?W
^+Vf*YY 8
public static void sort(int[] data) { iq5-eJmq
sort(data, IMPROVED_QUICK); P+rDln{
} 0aYoc-( A
private static String[] name={ )\{]4[9N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {=+'3p
}; Z{_YH7_
\{o<-S;h
private static Sort[] impl=new Sort[]{ #_:%Yd
new InsertSort(), Yr>7c1FZi
new BubbleSort(), IkQ,#Bsb[
new SelectionSort(), WogCt,
new ShellSort(), t;t;+M|W
new QuickSort(), Iz!]LW
new ImprovedQuickSort(), )OFf nKh
new MergeSort(), = @lM*
new ImprovedMergeSort(), B06W(y,3Q>
new HeapSort() L(HAAqRnJ
}; !@FzP@
t]ID
public static String toString(int algorithm){ 9]g`VD6<v
return name[algorithm-1]; =V:Al
} 7<LCX{Uw
/7WdG)'
public static void sort(int[] data, int algorithm) { +_ $!9m
impl[algorithm-1].sort(data); N \woFrG
} Crezo?
26=G%F6
public static interface Sort { )p{,5"0u
public void sort(int[] data); 7_L$XIa
} -E.fo._L5
:\%ZTBLL
public static void swap(int[] data, int i, int j) { g!`^!Q/($
int temp = data; 8,)<,g-/=
data = data[j]; QGnUPiD^
data[j] = temp; H^jcWwy:
} +[[^W;<.l
} wjHH%y