[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; }MRgNr'k
} >6o <Q
int i1=l; %`&n ;K.c
int i2=mid+1; Z\IM~-
for(int cur=l;cur<=r;cur++){ y 9]d{:9
if(i1==mid+1) lw9jk`7^
data[cur]=temp[i2++]; ZxnPSA@%
else if(i2>r) 'lZlfS:Z8
data[cur]=temp[i1++]; >+dSPI
else if(temp[i1] data[cur]=temp[i1++]; et 1HbX
else 7@;*e=v
data[cur]=temp[i2++]; 3k)xzv%r`
} m| ,Tk:xH
} zas&gsl-;
jum"T\
} OCx'cSs-=
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改进后的归并排序: y]jx-wc3O
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package org.rut.util.algorithm.support; z[c8W@OJ
.Od:#(aq
import org.rut.util.algorithm.SortUtil; :b44LXKCP
]%6%rq%9C
/** k={D!4kKz
* @author treeroot b\}a
* @since 2006-2-2 caQ1SV^{9
* @version 1.0 d%P2V>P
*/ }U_^zQfaj
public class ImprovedMergeSort implements SortUtil.Sort { 7#E/Q~]'6
Z{^!z
private static final int THRESHOLD = 10; s9wzN6re
n>v1<^
/* *LB-V%{|'
* (non-Javadoc) /+92DV
* e#;43=/Ia
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "rn
*/ Z3TCi7,m
public void sort(int[] data) { {A0F/#M]
int[] temp=new int[data.length]; 6)^*DJy
mergeSort(data,temp,0,data.length-1); \XB,)XDB
} swj\X,{
NRx 7S9W
private void mergeSort(int[] data, int[] temp, int l, int r) { v"1&xe^4
int i, j, k; E"E(<a
int mid = (l + r) / 2; #a}w&O";
if (l == r) H>/,Re
return; ([q>.[WbH]
if ((mid - l) >= THRESHOLD) V4Rs
mergeSort(data, temp, l, mid); { }/
else #-B<u-
insertSort(data, l, mid - l + 1); %6cr4}Zm}
if ((r - mid) > THRESHOLD) `C>h]H(
mergeSort(data, temp, mid + 1, r); pqO3(2F9
else bDvGFSAH
insertSort(data, mid + 1, r - mid); j>JBZ#g
d8: $ll
for (i = l; i <= mid; i++) { bKS/T^UQ
temp = data; EcHZmf
} I'P|:XKI
for (j = 1; j <= r - mid; j++) { _K9PA[m5~
temp[r - j + 1] = data[j + mid]; 3J"`mQ
} uN<=v&]q
int a = temp[l]; [s^pP2
int b = temp[r]; /1LN\Eu
for (i = l, j = r, k = l; k <= r; k++) { ]&]G
if (a < b) { @TALZk'%
data[k] = temp[i++]; zRjbEL
a = temp; {1)bLG|$
} else { VDnrm*
data[k] = temp[j--]; w~B1TfqNo
b = temp[j]; K;"H$0!9
} WDY\Fj
} k H65k (
} p_Xfj2E4c
hXI[FICQU{
/** %@:>hQ2;
* @param data X40gJV<
* @param l `S((F|Ty=;
* @param i l)$mpMgAD
*/ [Z/P[370
private void insertSort(int[] data, int start, int len) { h's[) t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xCL)<8[R,}
} =M 8Mt/P
} ;*qXjv& K
} v>K|hH
} ;0WAfu}#H
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堆排序： S<]k0bC
^r}Uu~A>
package org.rut.util.algorithm.support; ek)rsxf1A
TSFrv8L
import org.rut.util.algorithm.SortUtil; BMAWjEr
i-0 :Fs
/** ;fqp!|J
* @author treeroot LF.i0^#J
* @since 2006-2-2 4mY^pQ1=L
* @version 1.0 EO+Ix7w
*/ TQeIAy
public class HeapSort implements SortUtil.Sort{ ;VCV%=W<
MMa`}wSs
/* (non-Javadoc) E*)A!2rlK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _\4r~=`HQ
*/ _~Od G
public void sort(int[] data) { aEdMZ+P.
MaxHeap h=new MaxHeap(); MkVv5C
h.init(data); ^'Lp<YJs6
for(int i=0;i h.remove(); 6p;Pf9 f
System.arraycopy(h.queue,1,data,0,data.length); ;0_T\{H"nR
} %pg)*>P h
Z=-#{{bv
private static class MaxHeap{ KD#zsL)3
>;G_o="X
void init(int[] data){ L`M{bRl+1
this.queue=new int[data.length+1]; !(bYh`Uy
for(int i=0;i queue[++size]=data; W9gQho%9b
fixUp(size); }kAE
} tx;2C|S$oU
} @B{
bL<H$DB6
private int size=0; 5Zc
8Ie0L3d-
private int[] queue; |qpm
@I Y<i5(
public int get() { Flpl,|n a
return queue[1]; 2FL_!;p;2E
} 1;./e&%%
5D3&E_S
public void remove() { :fX61S6)
SortUtil.swap(queue,1,size--); ce4rhtkV
fixDown(1); :OU(fz]
} T:Q+ Z }v+
file://fixdown "nJMS6HJ[
private void fixDown(int k) { uR")@Tc
int j; sfG9R"
while ((j = k << 1) <= size) { B7A.~'=
if (j < size %26amp;%26amp; queue[j] j++; :zC=JvKT
if (queue[k]>queue[j]) file://不用交换 MeV4s%*O+
break; i{:?Iw 'ay
SortUtil.swap(queue,j,k); 3|e~YmZx
k = j; 0*^f EoV
} :;#^gvH
} *>iJ=H
private void fixUp(int k) { 78T;b7!-C
while (k > 1) { ]mJ9CP8P1c
int j = k >> 1; 5FJ%"5n&
if (queue[j]>queue[k]) 5-a^Frmg#"
break; mMZ=9 ?m
SortUtil.swap(queue,j,k); WZA1nzRc
k = j; +7"UF) ~k
} T8LvdzS
} kVWrZ>McK
'#K~hep
} ZnbpIJ8cV
JKYtBXOl
} M9Z9s11{H
pOy(XUV9O
SortUtil： |<]wM(GxE
%RIu'JXi
package org.rut.util.algorithm; ctb , w
pdQaVe7tRo
import org.rut.util.algorithm.support.BubbleSort; M(^IRI-
import org.rut.util.algorithm.support.HeapSort; qsN}KgTjg
import org.rut.util.algorithm.support.ImprovedMergeSort; $43CNnf3N
import org.rut.util.algorithm.support.ImprovedQuickSort; >&Ye(3w&
import org.rut.util.algorithm.support.InsertSort; |%Y=]@f
import org.rut.util.algorithm.support.MergeSort; 10dK%/6/O
import org.rut.util.algorithm.support.QuickSort; MmfshnTN
import org.rut.util.algorithm.support.SelectionSort; ;h~kB
import org.rut.util.algorithm.support.ShellSort; +ZwTi!W
UA0R)BH'
/** Dxr4B<
* @author treeroot q<g!bW%
* @since 2006-2-2 1{xkAy0
* @version 1.0 odeO(zuU
*/ ~8Ef`zL
public class SortUtil { w `M/0.)V
public final static int INSERT = 1; jN+2+P%OL
public final static int BUBBLE = 2; 2zjY|g/
public final static int SELECTION = 3; \<=.J`o{
public final static int SHELL = 4; HRd02tah
public final static int QUICK = 5; :OaGdL
public final static int IMPROVED_QUICK = 6; ]_y;Igaj
public final static int MERGE = 7; Q|Pm8{8
public final static int IMPROVED_MERGE = 8; Wu?[1L:x
public final static int HEAP = 9; h=cA]^:=
a'G[!"
public static void sort(int[] data) { [/cJc%{N
sort(data, IMPROVED_QUICK); ]%5gPfv[T
} 2Q/V D,yU
private static String[] name={ WdrMp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KC\W6|NtGj
}; MIv,$
2IDn4<`
private static Sort[] impl=new Sort[]{ 6`'KM/
new InsertSort(), kdm@1x
new BubbleSort(), 7sJGB^vM
new SelectionSort(), n{F&GE="
new ShellSort(), 4,6?sTuX
new QuickSort(), xO 1uHaL
new ImprovedQuickSort(), T6rjtq
new MergeSort(), # f{L;
new ImprovedMergeSort(), ?7*J4.
new HeapSort() -uK@2}NZ
}; |SsmVW$B|
CYk"
public static String toString(int algorithm){ ?rwHkPJ{*
return name[algorithm-1]; H!g9~a
} 4kLTKm:G
Uv3Fe%>
public static void sort(int[] data, int algorithm) { ~!dO2\X+
impl[algorithm-1].sort(data); 8g 2'[ci$q
} E+aE5wmr
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public static interface Sort { y=WCR*N
public void sort(int[] data); p["20?^
} B\7 80p<
t4,(W`
public static void swap(int[] data, int i, int j) { FE?^}VH
int temp = data; k$K>ml/h
data = data[j]; YcuHYf5
data[j] = temp; Ils^t
} ^d/,9L\U
} cNRe>