[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; P(cy@P,D
} Fx )BMP
int i1=l; /X%+z5
int i2=mid+1; %uDH_J|^
for(int cur=l;cur<=r;cur++){ Mh~E]8b
if(i1==mid+1) 45;ey }8
data[cur]=temp[i2++]; wEC,Mbn
else if(i2>r) <.hutU*1
data[cur]=temp[i1++]; pT/z`o$#V
else if(temp[i1] data[cur]=temp[i1++]; :f~qt%%/
else DB3qf>@?
data[cur]=temp[i2++]; n&3}F?
} gUY~ l= c
} ||4T*B06
S?#6{rx
} 5i+cjT2
U1O8u-X
改进后的归并排序: 9;NXzO27
p0hE`!
package org.rut.util.algorithm.support; lBGYZ--
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import org.rut.util.algorithm.SortUtil; 1Eb2X}XC
nF$HWp&gt
/** ?AK`M #M
* @author treeroot /xj`'8
* @since 2006-2-2 +QNsI2t;r
* @version 1.0 ^h^.;Iqr=
*/ ,B'fOJ.2
public class ImprovedMergeSort implements SortUtil.Sort { _@W1?;yD
SEVB.;
private static final int THRESHOLD = 10; A9;,y'm^8
KD.|oo
/* S%aup(wu6
* (non-Javadoc) EjMVlZC>
* y%?'<j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p6!5}dD(
*/ D -d
public void sort(int[] data) { 0TZB}c#qT
int[] temp=new int[data.length]; &gKDw!al
mergeSort(data,temp,0,data.length-1); F?[1m2
} .f"1(J8
)/)[}wN;j
private void mergeSort(int[] data, int[] temp, int l, int r) { sC0u4w>Y
int i, j, k; 4}s'xMT!
int mid = (l + r) / 2; V~p01f"J
if (l == r) |1zfXG,R
return; lV$CBS
if ((mid - l) >= THRESHOLD) 9p{n7.
mergeSort(data, temp, l, mid); JOJuGB-d
else \Y>b#*m(4
insertSort(data, l, mid - l + 1); Q6D>(H#"0
if ((r - mid) > THRESHOLD) *@p"
mergeSort(data, temp, mid + 1, r); m2"wMt"*V
else 4.^T~n G
insertSort(data, mid + 1, r - mid); _QEw=*.<
n_Qua|R
for (i = l; i <= mid; i++) { qYJ<I'Ux O
temp = data; bX$1PYX
} |'z24 :8
for (j = 1; j <= r - mid; j++) { NyT%S?@y<
temp[r - j + 1] = data[j + mid]; g?Tev^D
} 6 &0r/r
int a = temp[l]; zyhM*eM.7
int b = temp[r]; )z\#
for (i = l, j = r, k = l; k <= r; k++) { uAqiL>y
if (a < b) { Rk7F;2
data[k] = temp[i++]; _ xTpW
a = temp; x"g)pGsT
} else { g'b|[ q
data[k] = temp[j--]; g(W+[kj)
b = temp[j]; yQMwt|C4
} 2]Il:>n,
} <D3mt Q
} qB (Pqv
D=mmBo
/** G{]RC^Zo
* @param data ,h*N9}xYTi
* @param l mvK^')
* @param i 9I]Bt=2z
*/ YLi6GY
private void insertSort(int[] data, int start, int len) { |T@SlNi]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Jw8?o/1D@
} ]95VMyN
} )~)l^0X
} Y|><Ls6Q
} ij;NM:|Sd
,|s*g'u
堆排序： E& i (T2c
fs 2MYat
package org.rut.util.algorithm.support; Bh'fkW3
\c4jGJ
import org.rut.util.algorithm.SortUtil; wpuK?fP
7)V"E-6h
/** l[c '%M|N
* @author treeroot s$isDG#Sr
* @since 2006-2-2 e)n ,Y
* @version 1.0 &TBFt;
*/ j!>P7 8
public class HeapSort implements SortUtil.Sort{ I51]+gEN
Or.u*!od&
/* (non-Javadoc) yy=hCjQ)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'k[qx}
*/ pQBn8H|Y
public void sort(int[] data) { d/ ^IL*O
MaxHeap h=new MaxHeap(); j=irx5:
h.init(data); G|f9l?p
for(int i=0;i h.remove(); wQUl!s7M;
System.arraycopy(h.queue,1,data,0,data.length); FHQ`T\fC$@
} TPJF?.le '
p"p~Bx
private static class MaxHeap{ yiQ?p:DM
&L$9Ii
void init(int[] data){ ?iP7Ki
this.queue=new int[data.length+1]; f(w>(1&/B
for(int i=0;i queue[++size]=data; B223W_0"o
fixUp(size); @!fUp b
} KJ'ID
} bh1$ A
W+!UVUpW
private int size=0; P-Y_$Nv0g
/S"jO[n9b
private int[] queue; "u7[[.P)
PiKP.
public int get() { #j~FlY5
return queue[1]; Pl/ dUt_
} z;>$["t]6
Sc[#]2 }
public void remove() { !6'N-b1
SortUtil.swap(queue,1,size--); X?'cl]1?
fixDown(1); ML905n u
} /%& d:
file://fixdown BS##nS-[
private void fixDown(int k) { oN,1ig
int j; 0qJ (RB
while ((j = k << 1) <= size) { ~|}]
if (j < size %26amp;%26amp; queue[j] j++; gPKf8{#%e
if (queue[k]>queue[j]) file://不用交换 +-@n}xb@
break; nXRa_M(z8
SortUtil.swap(queue,j,k); [Jt}^
k = j; 1 jidBzu<
} cpjwc@UMe
} cb9-~*1
private void fixUp(int k) { +-<G(^
while (k > 1) { 9S|sTf
int j = k >> 1; l)[|wPf
if (queue[j]>queue[k]) 1<BKTMBq?{
break; $z%(He
SortUtil.swap(queue,j,k); P?h1nxm`'
k = j; ?@G s7'
} !l $d^y345
} Zt!#KSF7%
+^Xf:r` G
} lr>NG,N
=-si| 1Z
} <YU?1y?V
@njNP^'Kx
SortUtil： 2o?j{K
u8zL[]>
package org.rut.util.algorithm; Km(i}:6"
;W?#l$R
import org.rut.util.algorithm.support.BubbleSort; ;gZ ^c]\
import org.rut.util.algorithm.support.HeapSort; nEsD+}E?
import org.rut.util.algorithm.support.ImprovedMergeSort; Nnh\FaI
import org.rut.util.algorithm.support.ImprovedQuickSort; "'z}oS
import org.rut.util.algorithm.support.InsertSort; i=xh;yb|
import org.rut.util.algorithm.support.MergeSort; U*C^g}iA
import org.rut.util.algorithm.support.QuickSort; :|W=2(>
import org.rut.util.algorithm.support.SelectionSort; PGP#$JC
import org.rut.util.algorithm.support.ShellSort; ni?k' \\
\AwkK3
/** unFRfec{
* @author treeroot ;TJpD0
* @since 2006-2-2 UOZ+&DL,L
* @version 1.0 6MVu"0#
*/ vu+g65"
public class SortUtil { KmNnW1T
public final static int INSERT = 1; =5\*Zh1
public final static int BUBBLE = 2; Jo {:]:
public final static int SELECTION = 3; b{<?E };%
public final static int SHELL = 4; Yg8*)u0
public final static int QUICK = 5; H'k}/<%Q
public final static int IMPROVED_QUICK = 6; 9-pt}U
public final static int MERGE = 7; n2K1X!E$
public final static int IMPROVED_MERGE = 8; =%m{|HQ`
public final static int HEAP = 9; +aOdaNcI
M@xU59$@
public static void sort(int[] data) { wtYgHC}X
sort(data, IMPROVED_QUICK); ~M}{rl.n=
} 6B?jc/V.R
private static String[] name={ @R5^J{T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q!c=f!U?\l
}; 5_;-Qw
G!6b )4L-
private static Sort[] impl=new Sort[]{ |6Q5bV
new InsertSort(), xF[%R{Mn'
new BubbleSort(), WML--<dU
new SelectionSort(), ii?T:T@
new ShellSort(), U823q-x
new QuickSort(), xh2r?K@k>
new ImprovedQuickSort(), 4k225~GQ:C
new MergeSort(), G[>NP#P
new ImprovedMergeSort(), _f^6F<!
new HeapSort() Rf!v{\
}; KUJLx
%+l95Dv1
public static String toString(int algorithm){ n[Q(q[ULV
return name[algorithm-1]; b=5w>*
} UQu6JkbLL
osXEzr(
public static void sort(int[] data, int algorithm) { /0/ouA>+
impl[algorithm-1].sort(data); z,aMbgt
} 8{ZTHY-
JQQ[jl;
public static interface Sort { pWxk^qhe/
public void sort(int[] data); +mWf$+w
} xq((]5Py
h^ Cm\V
public static void swap(int[] data, int i, int j) { 1'o[9-
int temp = data; _bCAZa&&
data = data[j]; t"4* ]S
data[j] = temp; c]uieig0~
} ?z.?(xZ 6
} g[(@@TiG