[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\8FjJ>9
} 4fZ$&)0&
int i1=l; rGRxofi.
int i2=mid+1; Jnm{i|6N
for(int cur=l;cur<=r;cur++){ +*d,non6v
if(i1==mid+1) ((Ec:(:c
data[cur]=temp[i2++]; _4rb7"b1
else if(i2>r) 9 YU7R)
data[cur]=temp[i1++]; As1Er[>
else if(temp[i1] data[cur]=temp[i1++]; ev#d1s|<S
else QM9~O#rL
data[cur]=temp[i2++]; Z%XBuq:BY
} Z.:5<oEKg
} jfS?#;T)
C_PXh>H]'
} ~7b'4\
7~eo^/PbS
改进后的归并排序: Nj.(iBmr
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package org.rut.util.algorithm.support; r['T.yo
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import org.rut.util.algorithm.SortUtil; v(=fV/
o]}b#U8S
/** 2sy{
* @author treeroot Q{H88g^=J
* @since 2006-2-2 %7O`]ik:
* @version 1.0 %g0"Kj5
*/ Q9 kKk
public class ImprovedMergeSort implements SortUtil.Sort { L1Fn;nR
q uv`~qn
private static final int THRESHOLD = 10; ]NuY{T&:
u-pE ;|
/* H<%7aOwO2
* (non-Javadoc) o]MQ)\r
* <jw`"L[D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W&z.O
*/ 1 xiq]~H
public void sort(int[] data) { @+Berb
int[] temp=new int[data.length]; \H<'W"
mergeSort(data,temp,0,data.length-1); ZGzrh`j{-
} '7wI 2D
ePIBg(
private void mergeSort(int[] data, int[] temp, int l, int r) { Q2^}NQO=
int i, j, k; (bH"x
int mid = (l + r) / 2; 5D-xm$8C
if (l == r) p."pI Bd
return; 0FjSa\ZH
if ((mid - l) >= THRESHOLD) !;'U5[}8
mergeSort(data, temp, l, mid); (Y, @-V
else B HoZ}1_
insertSort(data, l, mid - l + 1); F]z xx
if ((r - mid) > THRESHOLD) [_L:.,]g8
mergeSort(data, temp, mid + 1, r); !F;W#Gc
else -YA1Uk
insertSort(data, mid + 1, r - mid); C n\'sb{
KTBsH;6
for (i = l; i <= mid; i++) { 6peO9]Zy
temp = data; 5^GUuFt5m
} %nF6n:|:
for (j = 1; j <= r - mid; j++) { /qo.Z
temp[r - j + 1] = data[j + mid]; WsJ3zZc
} isDBNXV:
int a = temp[l]; :5U(}\dL{
int b = temp[r]; #?!)-Q%
for (i = l, j = r, k = l; k <= r; k++) { iIcO_ZyA
if (a < b) { /r[0Dw
data[k] = temp[i++]; e0j*e7$
a = temp; ( y2%G=.j
} else { H`),PY2
data[k] = temp[j--]; D>?%p"e
b = temp[j]; pL.r 9T.
} #2_phm'
} '"~|L>F%G
} +S^Uw'L$=T
jp=^$rS6[
/** -g;iMqh#
* @param data w;}P<K
* @param l s#)fnNQ,
* @param i 9i yNR!
*/ PM7*@~.
private void insertSort(int[] data, int start, int len) { '2uQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IA$:r@QNx8
} f/*Xw{s#
} >Ah [uM
} 'Xxt[Jy
} )(PA:j
@,i:fY
堆排序： a&.8*|w3
c/x ^I{b*
package org.rut.util.algorithm.support; oq^#mJL
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import org.rut.util.algorithm.SortUtil; ;5PXPpJ
nI|jUD+y
/** Q;)[~p
* @author treeroot 1 c3gHc7{t
* @since 2006-2-2 rzLpVpTaz
* @version 1.0 XlV#)JX
*/ +sQ=Uw#e
public class HeapSort implements SortUtil.Sort{ J6n@|L!yO
Zh{Pzyp
/* (non-Javadoc) TW{.qed8^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~>k<I:BtrT
*/ v'`C16&^]
public void sort(int[] data) { 9Fv1D
MaxHeap h=new MaxHeap(); ]A5FN4 E
h.init(data); b5No>U) /
for(int i=0;i h.remove(); oa}-=hG
System.arraycopy(h.queue,1,data,0,data.length); HP:ee+n
} vCFMO3
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private static class MaxHeap{ ?`uY*+u
VI74{='=
void init(int[] data){ kHo0I8
this.queue=new int[data.length+1]; Ldf<
for(int i=0;i queue[++size]=data; yS@c2I602
fixUp(size); ht(RX
} 4~P{H/]
} }XX)U_x
8jMw7ti
private int size=0; -ce N}Cb3
-iR}kP|
private int[] queue; +Hc[5WL
X#Y0g`muW
public int get() { K``MS
return queue[1]; z{]$WVs:^
} 3PIZay
W.r0W2))(
public void remove() { Dwj!B;AZ_
SortUtil.swap(queue,1,size--); Ckj2$c~
fixDown(1); ?S~HnIn
} WUvrC
file://fixdown 4`I2tr
private void fixDown(int k) { MT[V1I{LV
int j; )iNMjg
while ((j = k << 1) <= size) { T&oY:1D,g
if (j < size %26amp;%26amp; queue[j] j++; 3%bCv_6B
if (queue[k]>queue[j]) file://不用交换 0BMKwZg
break; zq>pK_WG
SortUtil.swap(queue,j,k); =ps3=D
k = j; Ur6UE2
} Qj.]I0d
} 1p[C5j3
private void fixUp(int k) { E2 Q[
while (k > 1) { FIL?nkYEO
int j = k >> 1; $A;jl`ng
if (queue[j]>queue[k]) 5Ev9u),D+v
break; ",!#7h
SortUtil.swap(queue,j,k); ?3D|{
k = j; 8UJK]_99I,
} lr'h
} 4zkn~oy
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} ^I4'7]n-
E (
} :hJHjh
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SortUtil： ##+|zka!U
X; I:i%-
package org.rut.util.algorithm; w#vSZbh
VkTdpeBV
import org.rut.util.algorithm.support.BubbleSort; mk(O..)2
import org.rut.util.algorithm.support.HeapSort; 9 js!gJC
import org.rut.util.algorithm.support.ImprovedMergeSort; }Qyuy~-&^
import org.rut.util.algorithm.support.ImprovedQuickSort; -^LUa]"E
import org.rut.util.algorithm.support.InsertSort; f!%G{G^`
import org.rut.util.algorithm.support.MergeSort; {; #u~e(W
import org.rut.util.algorithm.support.QuickSort; a8ya5EO
import org.rut.util.algorithm.support.SelectionSort; UF0W%Z
import org.rut.util.algorithm.support.ShellSort; qB6@OS
Dk8 O*B
/** @ x_.
* @author treeroot me:~q#k
* @since 2006-2-2 O#LG$Y n*
* @version 1.0 I,TJV)B
*/ XtY!fo*
public class SortUtil { 8,B?!%FP
public final static int INSERT = 1; q.0Evr:
public final static int BUBBLE = 2; _&V%idz!0
public final static int SELECTION = 3; 2;Vss<hR4A
public final static int SHELL = 4; <Hd8Jd4f
public final static int QUICK = 5; }<R,)ZV^G
public final static int IMPROVED_QUICK = 6; z"#iG&>a,
public final static int MERGE = 7; %LyZaU_sB
public final static int IMPROVED_MERGE = 8; ZByxC*Cz
public final static int HEAP = 9; ~puXZCatN
Loz5[L
public static void sort(int[] data) { 0U|t@&q
sort(data, IMPROVED_QUICK); $J6Pv
} jf&B5>-x
private static String[] name={ -#<6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }L mhM
}; DJ_[{WAV
z=mH\!
private static Sort[] impl=new Sort[]{ 21NGsG
new InsertSort(), X$*MxMNs
new BubbleSort(), & -r^Q
new SelectionSort(), f>*T0"\c
new ShellSort(), A*+pGQ
new QuickSort(), ]oT8H?%*Y
new ImprovedQuickSort(), K[wny0 (
new MergeSort(), ~8 >Tb
new ImprovedMergeSort(), 7~b=G
new HeapSort() o>|&k]W/
}; LSewMj
WX"iDz.
public static String toString(int algorithm){ yyPQ^{zD
return name[algorithm-1]; f(M$m,d
} 7Qdf#DG
OBb m?`[
public static void sort(int[] data, int algorithm) { w8=&rzr8
impl[algorithm-1].sort(data); OaTnQ|*
} BF^dNgn+%K
V52>K$j
public static interface Sort { F}1h
public void sort(int[] data); Ibf~gr(j
} {6 #Qm7s-
bG0 |+k3O
public static void swap(int[] data, int i, int j) { ML_$/
int temp = data; M)x6m|.=
data = data[j]; oW}nr<G{<
data[j] = temp; m}UcF oaO
} F u>
} (Q5rOrA"