[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; Uu52uR
} M[+#*f.T}
int i1=l; Yep~C%/}
int i2=mid+1; jSSEfy>^
for(int cur=l;cur<=r;cur++){ 'F#dv[N
if(i1==mid+1) V/:2xT
data[cur]=temp[i2++]; Rt:^'Qi$!
else if(i2>r) ];jp)P2o
data[cur]=temp[i1++]; O"/Sv'|H#
else if(temp[i1] data[cur]=temp[i1++]; IT)3Et@Y
else C#4_`4{
data[cur]=temp[i2++]; >q0%yh-
} &YcOmI/MM
} 6`vW4]zu
m;A[2 6X
} L^zh|MEyzk
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改进后的归并排序: }dHdy{$
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package org.rut.util.algorithm.support; HOF=qE*p
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import org.rut.util.algorithm.SortUtil; i(OeE"YA
3<xDxj0<
/** 9e c},~(
* @author treeroot =R~zD4{"
* @since 2006-2-2 2gZ nrU
* @version 1.0 Mi{ns $B%
*/ ?3 k_YN"
public class ImprovedMergeSort implements SortUtil.Sort { znPh7{|<
0~K&P#iR
private static final int THRESHOLD = 10; RKE"}|i+S
vj344B
/* e(xuy'4r
* (non-Javadoc) (Zd(?">i
* FUlhEH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ibu9AwPm
*/ C\aHr!
public void sort(int[] data) { vf$IF|
int[] temp=new int[data.length]; +iFt)
mergeSort(data,temp,0,data.length-1); | oK9o6m4
} Aq*?Q/pV
oP9 y@U
private void mergeSort(int[] data, int[] temp, int l, int r) { ?Pp*BB,*y
int i, j, k; IVkB)9IW
int mid = (l + r) / 2; pf107S
if (l == r) *z)gSX
return; ,[t?$Cy;
if ((mid - l) >= THRESHOLD) c{_JPy
mergeSort(data, temp, l, mid); \@WVeFr
else dS3\P5D.*c
insertSort(data, l, mid - l + 1); 1+WVh7gF
if ((r - mid) > THRESHOLD) i>]PW|]
mergeSort(data, temp, mid + 1, r); `}KxzD
else ^=n7E
insertSort(data, mid + 1, r - mid); Q$:Q6/5.
J{-`&I'b
for (i = l; i <= mid; i++) { 11YJW-V
temp = data; S2;^
} VgODv
for (j = 1; j <= r - mid; j++) { '?mF,Co{
temp[r - j + 1] = data[j + mid]; DyCzRkH
} R y#C#0
int a = temp[l]; Hz."4nhv
int b = temp[r]; ~59lkr8
for (i = l, j = r, k = l; k <= r; k++) { ooUVVp
if (a < b) { JO0o@M5H
data[k] = temp[i++]; TH'8^wf
a = temp; ~/9RSdv7
} else { VOZxLyj^9
data[k] = temp[j--]; w5{l-Z
b = temp[j]; d+,!p8Q
} ;nP(S`'
} 5cinI^x)f
} MTZCI}
Z#-N$%^F
/** t@9-LYbL
* @param data V){Io_"
* @param l r6'dEa
* @param i _1qR1<V
*/ 3MFTP5~
private void insertSort(int[] data, int start, int len) { @R50M (@W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #` gu<xlW
} YCh`V[0
} zMu9A|
} !ess.U&m'
} l^nvwm`f#:
mV`R'*1UC
堆排序： H"8B4~*7H
tEvDAI} 5
package org.rut.util.algorithm.support; 7~XA92
)Yy5u'}
import org.rut.util.algorithm.SortUtil; 1xd6p
1h?ve,$
/** 1x;@BV
* @author treeroot Ca5#'3Eh
* @since 2006-2-2 >Ti%Th,
* @version 1.0 J(d[05x0
*/ Ih|4ISI
public class HeapSort implements SortUtil.Sort{ r8:"\%"f>
!zF07.(E
/* (non-Javadoc) 5l1R")0`t_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gM>?w{!LBx
*/ '~K]=JP
public void sort(int[] data) { KFHZ3HZ:>
MaxHeap h=new MaxHeap(); T=tW'tlT\v
h.init(data); v0oVbHO5<
for(int i=0;i h.remove(); 'QG`^@Z
System.arraycopy(h.queue,1,data,0,data.length); *)-@'{]uB
} Ovk=s,a)K
BLt58LYGX
private static class MaxHeap{ qX5>[qf-
[YULvWAJ
void init(int[] data){ bRy(`
this.queue=new int[data.length+1]; q%])dZ!lE
for(int i=0;i queue[++size]=data; #<b\BqYG
fixUp(size); 5)T[ha77u
} d=qVIpZ
} PHqg~q;*
J.R\h!
private int size=0; 6384$mT,S
F+(S-Qk1
private int[] queue; [BD`h
ZAn @NA=
public int get() { n4S`k%CI
return queue[1]; xw}yl4WT{
} .Ji9j[[#D
h>D;QY
public void remove() { trwQ@7
SortUtil.swap(queue,1,size--); EA>.SSs!
fixDown(1); :G@z?ZJ[
} :cWU,V
file://fixdown 5["3[h
private void fixDown(int k) { 5uQ+'*xN%
int j; c.Hw K\IU
while ((j = k << 1) <= size) { ?# FYF\P
if (j < size %26amp;%26amp; queue[j] j++; `i cs2po
if (queue[k]>queue[j]) file://不用交换 TU^ZvAO&
break; l1k&@1"
SortUtil.swap(queue,j,k); tUxH6IS
k = j; 9gw;MFP)D
} z+Fu{<#(
} Ut\:jV=f
private void fixUp(int k) { A/I\MN|
while (k > 1) { 0l[52eZ/
int j = k >> 1; HL4=P,'
if (queue[j]>queue[k]) A(E}2iP9=
break; 3{?X>6T
SortUtil.swap(queue,j,k); s2SV
k = j; y4h =e~
} $rcv@-l
} !;|#=A9
F*@2)
} iKrk?B<
we`BqZV
} SXqB<j$.;
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SortUtil： ]-X6Cl
bpZA%{GS
package org.rut.util.algorithm; Gh=I2GSo
Jk(V ]
import org.rut.util.algorithm.support.BubbleSort; /Z:NoTGn
import org.rut.util.algorithm.support.HeapSort; KF+r25uy[+
import org.rut.util.algorithm.support.ImprovedMergeSort; Tph^o^
import org.rut.util.algorithm.support.ImprovedQuickSort; fub04x)
import org.rut.util.algorithm.support.InsertSort; <DR|r
import org.rut.util.algorithm.support.MergeSort; "NA<^2W@J
import org.rut.util.algorithm.support.QuickSort; XyN " Jr
import org.rut.util.algorithm.support.SelectionSort; $+GDPYm'
import org.rut.util.algorithm.support.ShellSort; u*2?Gky
R;Dj70g
/** ;LP3
* @author treeroot Wjl2S+Cc
* @since 2006-2-2 Dch\k<Te
* @version 1.0 o0`']-)*2
*/ 6?[P^{GpH
public class SortUtil { 3S+9LOrhY
public final static int INSERT = 1; PF/K&&9}
public final static int BUBBLE = 2; #)~u YQ
public final static int SELECTION = 3; 63l& ihj
public final static int SHELL = 4; f4P({V
public final static int QUICK = 5; ^zV_vB)n
public final static int IMPROVED_QUICK = 6; o=7,U/{D!
public final static int MERGE = 7; 6ScB:8M
public final static int IMPROVED_MERGE = 8; GB Yy^wjU
public final static int HEAP = 9; ph5{i2U0
N`efLOMl]
public static void sort(int[] data) { @!dIa1Q"
sort(data, IMPROVED_QUICK); Oe\(=R
} <!>\ n\A
private static String[] name={ pt.V^a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [nig^8
}; ?}8r h%
Jg=!GU/::
private static Sort[] impl=new Sort[]{ 1xS+r)_n@
new InsertSort(), =AzPAN#e
new BubbleSort(), 3A`]Rk
new SelectionSort(), j8Z;}Ps
new ShellSort(), @6~lZgXOV[
new QuickSort(), Skci;4T(
new ImprovedQuickSort(), ]P wS3:x
new MergeSort(), Y}R$RDRL
new ImprovedMergeSort(), 2 G_KTYJ
new HeapSort() -)(=~|,Pq/
}; ~|S0E:*.
(CIcM3|9C
public static String toString(int algorithm){ Wrb[\ ?-
return name[algorithm-1]; y*^UGJC:
} }#D=Rf?2\P
F|> 3gW
public static void sort(int[] data, int algorithm) { G!$~'o%/
impl[algorithm-1].sort(data); 3ArHaAv{y
} _N|%i J5
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public static interface Sort { v}u]tl$,
public void sort(int[] data); =>5Lp
} BM?!?
kE<CuO
public static void swap(int[] data, int i, int j) { l,h`YIy
int temp = data; 34!.5^T
data = data[j]; KX9IC5pR
data[j] = temp; 7mYcO3{5{
} +^(_S9CO
} RD[P|4eY