[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; m|q?gX9R
} +./c=o/v
int i1=l; n8<o*f&&9>
int i2=mid+1; dFY]~_P472
for(int cur=l;cur<=r;cur++){ 3TUW+#[Gu
if(i1==mid+1) i`[5%6\"&
data[cur]=temp[i2++]; [MSLVTR
else if(i2>r) 9$,x^Qx
data[cur]=temp[i1++]; $r`K4g
else if(temp[i1] data[cur]=temp[i1++]; kN3T/96
else tP; &$y.8
data[cur]=temp[i2++]; )|;*[S4
} `nBCCz'Y!
} `$og]Dn;
vZV+24YWb
} @L^Fz$Sx
.d< +-w2Mu
改进后的归并排序: <viIpz2jh%
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package org.rut.util.algorithm.support; aE}1~`
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import org.rut.util.algorithm.SortUtil; iku8T*&uc
_XT],"
/** '[#a-8-JY_
* @author treeroot ~3}Gu^@
* @since 2006-2-2 o(xRq;i
* @version 1.0 Ol,;BZHc\
*/ Gvo(iOU
public class ImprovedMergeSort implements SortUtil.Sort { (Wkli:Lq
|1^>n,C
private static final int THRESHOLD = 10; _^4\z*x
1*S5:7Tb
/* p:M#F:
* (non-Javadoc) lB!`,>"c
* eUQ.,mP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !:e|M|T'I*
*/ Hw"ik6
public void sort(int[] data) { b *IJ +
int[] temp=new int[data.length]; B{|g+c%
mergeSort(data,temp,0,data.length-1); /CpUq;^
} 3/IQ]8g"
M=[/v/M=
private void mergeSort(int[] data, int[] temp, int l, int r) { 2m.RM&TdB
int i, j, k; H <CsB
int mid = (l + r) / 2; i^P@?
if (l == r) ZJ(/cD
return; Z=%+U _,
if ((mid - l) >= THRESHOLD) ?fv?6r
mergeSort(data, temp, l, mid); qGMM3a)Q
else ';`fMcN
insertSort(data, l, mid - l + 1); l,uYp"F,ps
if ((r - mid) > THRESHOLD) eeIh }t>[
mergeSort(data, temp, mid + 1, r); x4v@Kk/
else w+VeT@
insertSort(data, mid + 1, r - mid); }qfr&Ffh@
8Ml&lfn_8
for (i = l; i <= mid; i++) { 'Z2:u!E
temp = data; 7L)1mB.
} tB.;T0n
for (j = 1; j <= r - mid; j++) { =jD[A>3I
temp[r - j + 1] = data[j + mid]; RAR0LKGX
} A7U'>r_.
int a = temp[l]; CG'NC\x5
int b = temp[r]; R`=3lY;
for (i = l, j = r, k = l; k <= r; k++) { 3nuf3)
if (a < b) { *D`qcv
data[k] = temp[i++]; 'G6TSl
a = temp; [+$l/dag
} else { Z:f0>
data[k] = temp[j--]; pTq,"}J!+
b = temp[j]; U -~%-gFC
} GypZ!)1
} 8xhXS1
} GZT}aMMSJ
}C>Q
/** 1"46OCu{
* @param data i} 96,{
* @param l P8NKpO\
* @param i >JT{~SRB|Y
*/ U`q[5U"
private void insertSort(int[] data, int start, int len) { ^B@4 w\t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GkMNV7"m
} T#Pz_ hAu
} 04tUf3>
} AIsM:sV]
} 2'g< H-[
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堆排序： O{8"f\*
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package org.rut.util.algorithm.support; )6)|PzMQ'
j)\&#g0u6
import org.rut.util.algorithm.SortUtil; 7'FDI`e[
mOwgk7s[J
/** >7!aZO
* @author treeroot _dqjRhu
* @since 2006-2-2 _5a]pc$\Y]
* @version 1.0 >`*iM
*/ ^vm[`M
public class HeapSort implements SortUtil.Sort{ cJA0$)JP&
x( w <U1
/* (non-Javadoc) &Pxt6M\d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i=_leC)rl
*/ sb4)@/Q7j
public void sort(int[] data) { %u }|4BXoh
MaxHeap h=new MaxHeap(); IyG5Rj2
h.init(data); TUhp
for(int i=0;i h.remove(); *pP"u::S
System.arraycopy(h.queue,1,data,0,data.length); 0kgK~\^,.O
} yp5*8g5
3M{!yPlj
private static class MaxHeap{ rP ;~<IxEr
nR/; uTTz
void init(int[] data){ D,xWc|V
this.queue=new int[data.length+1]; qt]QO1pAd
for(int i=0;i queue[++size]=data; `.aL>hf
fixUp(size); F$r8hj`
} 567ot|cc
} 5!#"8|oY
el!Bi>b9c!
private int size=0; w|WZEu:0|
^a; V-US
private int[] queue; GQqw(2Ub}
!N$4.slr<p
public int get() { =D5@PHpv(
return queue[1]; p@i U}SUaE
} X2@mQ&n
$Br^c< y
public void remove() { ~p;<H
SortUtil.swap(queue,1,size--); {EJVZG:&
fixDown(1); *B}vYX
} :'y
file://fixdown |UnTd$m
private void fixDown(int k) { $ajw]2kx
int j; B0p>'O2
while ((j = k << 1) <= size) { SUD]Wl7G`r
if (j < size %26amp;%26amp; queue[j] j++; =)M8>>l
if (queue[k]>queue[j]) file://不用交换 -Kg@Sj/U}R
break; UShn)3F
SortUtil.swap(queue,j,k); U]vNcQj
k = j; Y@eHp-[
} H[@}ri<
} R'dF<&Kj|
private void fixUp(int k) { 3JW9G04.
while (k > 1) { fH`1dU
int j = k >> 1; md$[Bs9
if (queue[j]>queue[k]) } Q1$v~
break; p<*-B
SortUtil.swap(queue,j,k); 1)_f9GR
k = j; TG?;o/
} @<vDR">
} 0IDHoNaT<
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} 9Z*`{
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} WY 2b
6./&l9{h+
SortUtil： EVO5+
s^C*uP;R
package org.rut.util.algorithm; `m2F.^qrr
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import org.rut.util.algorithm.support.BubbleSort; $#R.+B
import org.rut.util.algorithm.support.HeapSort; ([f6\Pw\ <
import org.rut.util.algorithm.support.ImprovedMergeSort; w2{k0MW
import org.rut.util.algorithm.support.ImprovedQuickSort; uzp!Y&C
import org.rut.util.algorithm.support.InsertSort; F!]UaEmV
import org.rut.util.algorithm.support.MergeSort; eg(xN/D
import org.rut.util.algorithm.support.QuickSort; {h9#JMIA
import org.rut.util.algorithm.support.SelectionSort; );))kYr
import org.rut.util.algorithm.support.ShellSort; zN5i}U=|r
e}[$ =
/** nt;A7pI`
* @author treeroot yE"hgdL
* @since 2006-2-2 )W57n)]
* @version 1.0 hNx`=D9[7
*/ d0-}Xl
public class SortUtil { pbqa
public final static int INSERT = 1; =1yUH9\,b
public final static int BUBBLE = 2; BOwkC;Q[
public final static int SELECTION = 3; ~Ag!wj
public final static int SHELL = 4; Q]6nW[@j'
public final static int QUICK = 5; ?'T>/<(
public final static int IMPROVED_QUICK = 6; $Fr2oSTT)
public final static int MERGE = 7; M8juab%y
public final static int IMPROVED_MERGE = 8; rcI(6P<*
public final static int HEAP = 9; Eq.c;3
t:=Ui/!q
public static void sort(int[] data) { O')Ivm,E
sort(data, IMPROVED_QUICK); Kq{s^G
} ~S-x-cZ
private static String[] name={ ?WAlW,H>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $%1[<}<
}; Q8:u1$}
U +mx@C_
private static Sort[] impl=new Sort[]{ ' J-(v
new InsertSort(), _|A)ueY
new BubbleSort(), $~D`-+J
new SelectionSort(), Nm,vE7M
new ShellSort(), <[~x]-
new QuickSort(), R1P,0Yf
new ImprovedQuickSort(), e'\I^'`!M
new MergeSort(), "r"Y9KODm
new ImprovedMergeSort(), ^kt"n(P5
new HeapSort() v11mu2
}; H[>_LYZ8
x[(2}Qd
public static String toString(int algorithm){ )3..7ht3^5
return name[algorithm-1]; <CA lJ
} E0)v;yRcw
ie$=3nZJ}
public static void sort(int[] data, int algorithm) { ~!:F'}bj
impl[algorithm-1].sort(data); m2_&rjGz
} ^1Yx'ua'
{.!:T+'Xi\
public static interface Sort { mDM]RAub)
public void sort(int[] data); '|]zBpz
} %djx0sy
! prU!5-
public static void swap(int[] data, int i, int j) { dvL'>'g
int temp = data; <|2_1[,sl
data = data[j]; Kjf#uU.7
data[j] = temp; "\>3mVOb
} nmSpNkJ5
} +i)1 jX<