[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; LY}%|w
} 8 PI>Q
int i1=l; nTO,d$!Kp
int i2=mid+1; G]5m@;~l5
for(int cur=l;cur<=r;cur++){ qk~ni8
if(i1==mid+1) KJc fbZ~
data[cur]=temp[i2++]; t4)~A5s
else if(i2>r) o>x*_4[
data[cur]=temp[i1++]; TR3_!0
else if(temp[i1] data[cur]=temp[i1++]; [ L% -lJ
else 1(0LX^%
data[cur]=temp[i2++]; >?s[g)np
} dr3#?%
} to~Ap=E
B3[;}8u>
} *BzqAi0
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改进后的归并排序: v^2q\A-?
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package org.rut.util.algorithm.support; O'y8[<
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import org.rut.util.algorithm.SortUtil; 9`kxyh</
dcUaZfON
/** CDcZ6.f
* @author treeroot 7Pspx'u
* @since 2006-2-2 nDx}6}5)
* @version 1.0 l<I.;FN^9@
*/ rn3GBWC_C
public class ImprovedMergeSort implements SortUtil.Sort { /IS_-h7>XS
"<6X=|C
private static final int THRESHOLD = 10; WVDkCo@
u*:B 9E
/* @Bs7kjuX
* (non-Javadoc) A*tG[)
* *'D( j#&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3>FeTf#:
*/ &u) R+7bl,
public void sort(int[] data) { \xD.rBbt
int[] temp=new int[data.length]; )U0`?kD
mergeSort(data,temp,0,data.length-1); =\mAvVe
} * S4IMfp
L{_Q%!h3]
private void mergeSort(int[] data, int[] temp, int l, int r) { H4DM,.04
int i, j, k; V<&x+?>S
int mid = (l + r) / 2; JL0>-kg
if (l == r) ! h7?Ap
return; =+24jHs
if ((mid - l) >= THRESHOLD) )EQWc0iKG
mergeSort(data, temp, l, mid); Ni]V)wGE;
else KLVkPix;$
insertSort(data, l, mid - l + 1); !,8jB(
if ((r - mid) > THRESHOLD) )BI6nU
mergeSort(data, temp, mid + 1, r); z8v]Kt&
else ]o}g~Xn
insertSort(data, mid + 1, r - mid); B!:%^S
@'UbTB!
for (i = l; i <= mid; i++) { UQZ<sp4v;
temp = data; PvW {g5)S
} 3$x[{\ {
for (j = 1; j <= r - mid; j++) { cE(P^;7D
temp[r - j + 1] = data[j + mid]; Mf'T\^-!
} ~<[$.8*
int a = temp[l]; ?\|QDJXY
int b = temp[r]; KVQ^-^
for (i = l, j = r, k = l; k <= r; k++) { o< )"\f/,
if (a < b) { @PH`Wn#S
data[k] = temp[i++]; aMaICM
a = temp; fC6zDTis8A
} else { =j,2
data[k] = temp[j--]; L'1!vu *Rg
b = temp[j]; uY6]rt_#a
} |"}F cS y
} eBUexxBY
} (i..7B:
6-"@j@l5<
/** XPJsnu
* @param data S*"uXTS
* @param l =rL%P~0wq
* @param i 5"~F#vt
*/ }57s
private void insertSort(int[] data, int start, int len) { [)efh9P*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HL8onNq
} @aQ};~
} /x2-$a:<
} g|STegg
} +Tf4SJ
7'IcgTWDZy
堆排序： ~&}e8ah2
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package org.rut.util.algorithm.support; B3AWJ1o
HB|R1<t;HB
import org.rut.util.algorithm.SortUtil; #uRj9|E7
!=uaB.
/** ,J*C'#sW
* @author treeroot Py@/\V
* @since 2006-2-2 $O'IbA
* @version 1.0 qV$\E=%fhM
*/ 4D'AAr57
public class HeapSort implements SortUtil.Sort{ _^%DfMP3i\
u~pBMg ,
/* (non-Javadoc) gZf8/Tp\z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *\$m1g7b
*/ `erKHZ]S
public void sort(int[] data) { c1Rn1M,2k
MaxHeap h=new MaxHeap(); 6 2*p*t
h.init(data); R:+cumHr
for(int i=0;i h.remove(); Svicw`uX0
System.arraycopy(h.queue,1,data,0,data.length); =&K8~
} ,=IGqw
TSKT6_IJw
private static class MaxHeap{ .&i_~?1[N
;:PxWm|_
void init(int[] data){ u7/]Go44
this.queue=new int[data.length+1]; jk\z-hd
for(int i=0;i queue[++size]=data; 1IPRI<1U
fixUp(size); `GUGy.b
} YB}m1g`
} \[9^,QP
XN&cM,
private int size=0; H$ZLtPv5
(Q?@LzCjy
private int[] queue; YD{Ppz
11iV{ h
public int get() { %dwI;%0
return queue[1]; kNd(KQ<.17
} T -p~8=I
/(u# D[
public void remove() { ]3Y J a
SortUtil.swap(queue,1,size--); =5;tB
fixDown(1); C=Tq/L w
} B,fVNpqo
file://fixdown X> T_Xc
private void fixDown(int k) { m:D0O]2
int j; _iF*BnmN
while ((j = k << 1) <= size) { .TM. v5B
if (j < size %26amp;%26amp; queue[j] j++; d:Oo5t)MN
if (queue[k]>queue[j]) file://不用交换 YSB~04
break; UOpSH{N
SortUtil.swap(queue,j,k); ~l8w]R3A
k = j; Oz4vV_a&'
} wq7h8Z}l
} M%YxhuT0
private void fixUp(int k) { gHtflS
while (k > 1) { '2Lx>nByk
int j = k >> 1; ;4QE.&s`
if (queue[j]>queue[k]) PjP6^"
break; &u!MI
SortUtil.swap(queue,j,k); ;efF]")
k = j; jmG)p|6
} D}`MY\H
} '=`af>Nc
Iqci}G%r
} ;$67GK
X%$1%)C9
} Q?bCQZ{-Lh
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SortUtil： e'sS",o*
]XASim:A
package org.rut.util.algorithm; u+O"c
5@J]#bp0M
import org.rut.util.algorithm.support.BubbleSort; M.\XG}RR
import org.rut.util.algorithm.support.HeapSort; EbeSl+iMx_
import org.rut.util.algorithm.support.ImprovedMergeSort; "g*`G<W_s
import org.rut.util.algorithm.support.ImprovedQuickSort; <=Saf.
import org.rut.util.algorithm.support.InsertSort; #uV J
import org.rut.util.algorithm.support.MergeSort; 8!b>[Nsc
import org.rut.util.algorithm.support.QuickSort; P!SsMo6n
import org.rut.util.algorithm.support.SelectionSort; e8E'X
import org.rut.util.algorithm.support.ShellSort; ^Kl*}
rp4{lHw>C/
/** :r2d%:h%2
* @author treeroot C[';B)a
* @since 2006-2-2 u_}UU 2
* @version 1.0 = c1>ja
*/ +s6v!({Z
public class SortUtil { O)ose?Z
public final static int INSERT = 1; 4:Oq(e_(
public final static int BUBBLE = 2; ^ZIs>.'
public final static int SELECTION = 3; If]rg+|U
public final static int SHELL = 4; 1>/ iYf
public final static int QUICK = 5; ^oYRBEIJH
public final static int IMPROVED_QUICK = 6; xLb=^Xjec
public final static int MERGE = 7; l$kO%E'
public final static int IMPROVED_MERGE = 8; v0TbQ
public final static int HEAP = 9; ?LJiFG]^m
r/@Wn
public static void sort(int[] data) { ^G 'n z
sort(data, IMPROVED_QUICK); cNikLd~?A
} )G;Hf?M
private static String[] name={ .2U3_1dX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q3Z?Z;2aR
}; PJ=|g7I
bPif"dhHe
private static Sort[] impl=new Sort[]{ AyW=.
new InsertSort(), L&rtN@5;
new BubbleSort(), XZS%az1%
new SelectionSort(), ,)N/2M\B-
new ShellSort(), O)DAYBv^
new QuickSort(), y\4/M6
new ImprovedQuickSort(), %iME[| u&
new MergeSort(), L0I|V[
new ImprovedMergeSort(), cL!A,+S[_
new HeapSort() tSnsjd<6.
}; :xTm-L
"Bwmq9Jq
public static String toString(int algorithm){ ?S9vYaA$
return name[algorithm-1]; 6nJQPa
} >y,. `ECn
K<r5jb
public static void sort(int[] data, int algorithm) { {;th~[
impl[algorithm-1].sort(data); _>aP5g?Ep
} wW8[t8%43
MslgQmlM
public static interface Sort { T@`Al('
public void sort(int[] data); ,t;US.s([.
} m`n~-_
Jh<s '&FR
public static void swap(int[] data, int i, int j) { 4.uaWM)2
int temp = data; 34[TM3L].
data = data[j]; Fa\jVFIQ
data[j] = temp; eE=2~ ylU
} s? Xgo&rS_
} WRA(k