[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; cpOt?XYR~
} hL3up]pZ
int i1=l; g7zl5^o3j
int i2=mid+1; $]DuO1H./
for(int cur=l;cur<=r;cur++){ G=cRdiy`C
if(i1==mid+1) t<v.rb
data[cur]=temp[i2++]; +@rFbsyJ.
else if(i2>r) 5=?P6I_$G
data[cur]=temp[i1++]; $4{sPHi)I
else if(temp[i1] data[cur]=temp[i1++]; m \)B=H!bz
else MN<LZC%$
data[cur]=temp[i2++]; eke[{%L
} + +L7*1t
} IS]A<}j/-
HUx`RX0>
} p:xyy*I
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改进后的归并排序: ZH Q?{"
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package org.rut.util.algorithm.support; Wr[LC&
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import org.rut.util.algorithm.SortUtil; q1VKoKb6\:
A;d@NOI#,K
/** |qX?F`
* @author treeroot NMkP#s7.y
* @since 2006-2-2 qraXAQ
* @version 1.0 x"z\d,O%W
*/ Tr?p/9.m
public class ImprovedMergeSort implements SortUtil.Sort { g4^-B
6,=Z4>
private static final int THRESHOLD = 10; GN|"RuQ
) f~;P+
/* |.c4y*
* (non-Javadoc) |m-N5$\IC
* *y4g\#o.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OL\-SQ&
*/ ?6_]^:s
public void sort(int[] data) { &oMEz 0
int[] temp=new int[data.length]; uj3`M9
mergeSort(data,temp,0,data.length-1); #2^0z`-\_z
} F${sEtH
G u`xJ
private void mergeSort(int[] data, int[] temp, int l, int r) { WHC/'kvF
int i, j, k; r-T1^u
int mid = (l + r) / 2; 5~h)pt47
if (l == r) zLl-{Kk
return; vl/!w2
if ((mid - l) >= THRESHOLD) }[eUAGhDU
mergeSort(data, temp, l, mid); Zz} o t
else }Cu:BD.zQ
insertSort(data, l, mid - l + 1); OmBM)g
if ((r - mid) > THRESHOLD) sK%b16#
mergeSort(data, temp, mid + 1, r); YIk@{V
else ft/k-64
insertSort(data, mid + 1, r - mid); +k6` tl~*
7u"Q1n(h/
for (i = l; i <= mid; i++) { %i\rw*f
temp = data; GAfc9
} P.Tnq
for (j = 1; j <= r - mid; j++) { e;vI XJE
temp[r - j + 1] = data[j + mid]; ]pm/5|
} uYebRCdR
int a = temp[l]; boiP_*|MY
int b = temp[r]; 4(htdn6\
for (i = l, j = r, k = l; k <= r; k++) { T}!9T!(HdF
if (a < b) { qq!ZYWy2
data[k] = temp[i++]; wp~}1]g
a = temp; 4Y?fbb<
} else { &~eCDlX/
data[k] = temp[j--]; [lIX&!T"
b = temp[j]; d>Tv?'o`q
} <7y/)b@
} o+x%q<e;c
} pS8\B
E#P#{_BR^
/** w#1BHx
* @param data }h1BAKg
* @param l {eU>E/SQ
* @param i p@78Xmu?q
*/ UG.:D';3,
private void insertSort(int[] data, int start, int len) { v^eAQoFLhN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >C,0}lj
} rZ,qHM
} tzN9d~JZ
} ds*gL ~k^
} 1R_@C.I
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堆排序： P:g!~&Q
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package org.rut.util.algorithm.support; #c:@oe4v
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import org.rut.util.algorithm.SortUtil; OR&pGoW
\X %#-y
/** Sck!w 3
* @author treeroot K cex%.
* @since 2006-2-2 *ssw`}yE'
* @version 1.0 P_b5`e0O
*/ M"]?'TMfXc
public class HeapSort implements SortUtil.Sort{ <]?71{7X
g Nz
/* (non-Javadoc) Ip{hg,>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #N3*SE
*/ pej-W/R&
public void sort(int[] data) { (f"Qz~R|6_
MaxHeap h=new MaxHeap(); t[k ['<G
h.init(data); :&5u)
for(int i=0;i h.remove(); BUZ74
System.arraycopy(h.queue,1,data,0,data.length); [e,xC!2
} \u.5_ g
>? o5AdZ
private static class MaxHeap{ ;PVE= z+y
XSx!11
void init(int[] data){ 4+qo=i
this.queue=new int[data.length+1]; &5jc &CS
for(int i=0;i queue[++size]=data; I!F&8B+|
fixUp(size); .+2:~%v6
} 4grV2xtX
} 3K(/=
v$`3}<3-
private int size=0; [W$x5|Z}Q
E_&;.hw
private int[] queue; ?p6@uM\Q7
8Ud.t=2
public int get() { 3q'nO-KJ
return queue[1]; ral=`/p
} qKXg'1#E)
1grcCL q
public void remove() { $lB!Q8a$
SortUtil.swap(queue,1,size--); mr[1F]G
fixDown(1); VB^1wm
} 4Tuh]5
file://fixdown k'.cl^6Z8
private void fixDown(int k) { 'n{=`e(}cI
int j; (xfy?N
while ((j = k << 1) <= size) { 3I'7+?@@l
if (j < size %26amp;%26amp; queue[j] j++; `0s3to%7
if (queue[k]>queue[j]) file://不用交换 lx$Z/f
break; 1_&W1o
SortUtil.swap(queue,j,k); GwgY{-|`
k = j; pb<eg,
} [)X(Qtk
} `-s]dq
private void fixUp(int k) { 9XUYy2{G
while (k > 1) { PtPx(R3
int j = k >> 1; xxGQXW
if (queue[j]>queue[k]) E0i!|H
break; EP4?+"Z
SortUtil.swap(queue,j,k); g:^Hex?Yfd
k = j; &iuMB0rbu
} Yk{4 3yw
} c~M'O26bW
r"L:Mu
} 1"A"AMZf
T*k{^=6"!
} B*`[8kb,
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SortUtil： heES [
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package org.rut.util.algorithm; % T$!I(L&
*ax&}AHK[/
import org.rut.util.algorithm.support.BubbleSort; ^~B#r#
import org.rut.util.algorithm.support.HeapSort; 4d`f?8vS
import org.rut.util.algorithm.support.ImprovedMergeSort; ktY
import org.rut.util.algorithm.support.ImprovedQuickSort; DBfq9%J _
import org.rut.util.algorithm.support.InsertSort; &4t=Y`]SL
import org.rut.util.algorithm.support.MergeSort; u<\Sf"fs
import org.rut.util.algorithm.support.QuickSort; 2zsDb'r
import org.rut.util.algorithm.support.SelectionSort; $*fEgU% c
import org.rut.util.algorithm.support.ShellSort; TD;u"
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/** Fyz1LOH[X
* @author treeroot FLumI-se!
* @since 2006-2-2 8N<2RT8W
* @version 1.0 .4z_ohe
*/ gf;B&MM6
public class SortUtil { fob.?ID-;
public final static int INSERT = 1; &)Vuh=
public final static int BUBBLE = 2; T~lHm
public final static int SELECTION = 3; % y` tDR
public final static int SHELL = 4; 74A&#ecb{
public final static int QUICK = 5; ~!fOl)F
public final static int IMPROVED_QUICK = 6; QF.M%she+
public final static int MERGE = 7; 1N.weey}W
public final static int IMPROVED_MERGE = 8; qpB8ujj<V
public final static int HEAP = 9; i1qmFvksl
b5 AP{ #
public static void sort(int[] data) { 2ak*aI
sort(data, IMPROVED_QUICK); =VSUE Pq
} E_xCRfw_i]
private static String[] name={ U4NA'1yo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" + VhD]!
}; N@? z&urQi
R"`<ZY6(Ou
private static Sort[] impl=new Sort[]{ 0$R}_Ok
new InsertSort(), G7#<Jo<8
new BubbleSort(), xCU pMB7
new SelectionSort(), ?DM!=.]
new ShellSort(), AbMf8$$3SH
new QuickSort(), k _Bz@^J
new ImprovedQuickSort(), 2reQd47
new MergeSort(), .L3D]
new ImprovedMergeSort(), v00w GOpW
new HeapSort() J.,7d ,
}; U)S!@2(4
> 8!9
public static String toString(int algorithm){ 7@!ne&8Z?
return name[algorithm-1]; V?Ca[
} %vWh1-
#"JtH"pF
public static void sort(int[] data, int algorithm) { !y;xt?
impl[algorithm-1].sort(data); vcp[$-$QGJ
} KFHcHz
l !R >I7
public static interface Sort { 78zwu<ET
public void sort(int[] data); D89(u.h
} I|P#|0< 2
0e~4(2xK
public static void swap(int[] data, int i, int j) { Q$S|LC
int temp = data; D14i]
data = data[j]; qAVZ&:#
data[j] = temp; Z&Z=24q_
} w"FBJULzn9
} ^1+=HdN,