[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; 2,c{Z$\kn
} 9Z,vpTE
int i1=l; !\Y85o>JU
int i2=mid+1; w`(EW>i
for(int cur=l;cur<=r;cur++){ rzH*|B0g
if(i1==mid+1) 5eI3a!E]O
data[cur]=temp[i2++]; e7f3dqn0
else if(i2>r) ^mLZT*
data[cur]=temp[i1++]; ;Ocih<4k
else if(temp[i1] data[cur]=temp[i1++]; N4$!V}pp
else ~VZ)LQ'7
data[cur]=temp[i2++]; p$XL|1G*?H
} 7(;M
} G2]/g
_ECWSfZ
} / vI sX3v
JG xuB*}
改进后的归并排序: PiMW29B^
@|:_?
package org.rut.util.algorithm.support; #/NZ0IbHk
VC "66\d&
import org.rut.util.algorithm.SortUtil; KJPCO0"
\$Xo5f<
/** 12\h| S~
* @author treeroot !Pf_he
* @since 2006-2-2 T6[];|%W
* @version 1.0 F6*n,[5(
*/ yUF<qB
public class ImprovedMergeSort implements SortUtil.Sort { -s`/5kD
-/:N&6eRb
private static final int THRESHOLD = 10; S}Wj+H;
qJ=4HlLno
/* :-B,Q3d
* (non-Javadoc) zY\pZG
* 1ID0'j$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7mipj]
*/ ]sBSLEie '
public void sort(int[] data) { c:0nOP
int[] temp=new int[data.length]; ) -+u8#
mergeSort(data,temp,0,data.length-1); {_0m0 8
} H#IJ&w|
(0jT#&#
private void mergeSort(int[] data, int[] temp, int l, int r) { 8<UD#i@:C
int i, j, k; l+BJh1^
int mid = (l + r) / 2; iUl5yq
if (l == r) Q}p+/-U\
return; t|Cp<k]B
if ((mid - l) >= THRESHOLD) uGIA4CUm
mergeSort(data, temp, l, mid); 1!,xB]v1Ri
else %N#8D<ULd
insertSort(data, l, mid - l + 1); Ek|#P{!
if ((r - mid) > THRESHOLD) >p4#AfGF
mergeSort(data, temp, mid + 1, r); M>+FIb(
else &kKopJH
insertSort(data, mid + 1, r - mid); x8i;uH\8
BsV2Q`(gT
for (i = l; i <= mid; i++) { km1{Oh
temp = data; .LDK+c
} tbHU(#~
for (j = 1; j <= r - mid; j++) { ~1xln?Q
temp[r - j + 1] = data[j + mid]; _-aQ.p ?T
} +}H2|vP
int a = temp[l]; QeP8Vl&e:
int b = temp[r]; Ws"eF0,'Z
for (i = l, j = r, k = l; k <= r; k++) { $\kqh$")
if (a < b) { 4fPbwiKj
data[k] = temp[i++]; W]kh?+SZ
a = temp; FB{4& ;
} else { vL"U=Q+/eY
data[k] = temp[j--]; r`5[6)+P
b = temp[j]; +L_!$"I
} %?K1X^52d
} gqR?hZD
} d;`bX+K
InDISl]
/** =Nn&$h l
* @param data t(69gF\"
* @param l <Cc}MDM604
* @param i @vWf-\
*/ nQ4s
private void insertSort(int[] data, int start, int len) { @!z9.o;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VT1Nd
} M`!\$D
} x&qC~F*QR%
} Jolr"F?
} E)liuu!qI
OYKeu(=L
堆排序： tFLdBv!=:^
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package org.rut.util.algorithm.support; zlC|Spaf
j0b?dKd
import org.rut.util.algorithm.SortUtil; SE=3`rVJ
j+0=)Q%I=
/** dIiQ^M
* @author treeroot pp{Za@j
* @since 2006-2-2 jQjtO"\JG
* @version 1.0 u^H:z0
*/ JBa( O-T
public class HeapSort implements SortUtil.Sort{ P?%kV
!yAg!V KY
/* (non-Javadoc) 5 _X|U*+5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {=Y%=^!s
*/ d<mj=V@bd
public void sort(int[] data) { Bbuy y
MaxHeap h=new MaxHeap(); HMsTm}d
h.init(data); `OzcL
for(int i=0;i h.remove(); -QR&]U+
System.arraycopy(h.queue,1,data,0,data.length); =Q985)Y&
} U X)k;h
%_xRS
private static class MaxHeap{ siveqz6h
:G$f)NMK
void init(int[] data){ =!{7ZSu\
this.queue=new int[data.length+1]; FG.MV-G
for(int i=0;i queue[++size]=data; jt|e?1:vF
fixUp(size); $_s"16s
} l \~w(8g<A
} k(|D0%#b7
C.I.f9s?R
private int size=0; JjarMJr|D
nb}*IExd
private int[] queue; +*"u(7AV
.6Jo1$+
public int get() { V_pWf5F
return queue[1]; P,y*H_@k
} UJ-IK|P.#
(jYHaTL6Y'
public void remove() { S;#S3?G
SortUtil.swap(queue,1,size--); ab?
fixDown(1); Oga/
} {fXD@lhi
file://fixdown {@K>oaZ
private void fixDown(int k) { _l$V|
int j; 39| W(,
while ((j = k << 1) <= size) { Pg[XIfBva
if (j < size %26amp;%26amp; queue[j] j++; ZdbZ^DUR<(
if (queue[k]>queue[j]) file://不用交换 ^`ah\L
break; : vN'eL|#
SortUtil.swap(queue,j,k); *Dx&}"
k = j; b#;%TbDF
} ` #Qlr+X
} !#0Lo->OO
private void fixUp(int k) { d?dZ=]~C
while (k > 1) { UH=pQm^W
int j = k >> 1; M0[7>N_
if (queue[j]>queue[k]) |sd0fTK
break; k<p$BZ
SortUtil.swap(queue,j,k); 4/Ub%t-
k = j; G gmv(!
} ;0G+>&C8
} 0k"n;:KM8
?@"F\Bv<h
} yPG,+uQ$.
wZ7Opm<nt
} _U}pdzX?
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SortUtil： 'p3JYRT$
R5M/Ho 4
package org.rut.util.algorithm; $X1T!i[.X
8Jnb/A}
import org.rut.util.algorithm.support.BubbleSort; ``*iK
import org.rut.util.algorithm.support.HeapSort; S<do.{|p[
import org.rut.util.algorithm.support.ImprovedMergeSort; l-` M 9#
import org.rut.util.algorithm.support.ImprovedQuickSort; 'Rbv3U
import org.rut.util.algorithm.support.InsertSort; +&?#Gdb
import org.rut.util.algorithm.support.MergeSort; ?.1yNO*s
import org.rut.util.algorithm.support.QuickSort; #-S%aeB
import org.rut.util.algorithm.support.SelectionSort; zu8
import org.rut.util.algorithm.support.ShellSort; ykFm$ 0m+I
]PWK^-4P
/** \;&WF1d`ac
* @author treeroot pVgzUu7
* @since 2006-2-2 ;a@%FWc
* @version 1.0 d/I,`
*/ aLZza"W
public class SortUtil { uE{r09^q\
public final static int INSERT = 1; ~qFuS933
public final static int BUBBLE = 2; gaFOm9y.e
public final static int SELECTION = 3; ?N*m2rv
public final static int SHELL = 4; E= 3Ui
public final static int QUICK = 5; -/ 5" Py
public final static int IMPROVED_QUICK = 6; l":\@rm`
public final static int MERGE = 7; M<h2+0(il
public final static int IMPROVED_MERGE = 8; quXL'g
public final static int HEAP = 9; VX+:k.}
f(}?Sp_
public static void sort(int[] data) { NDsF<2A4
sort(data, IMPROVED_QUICK); YN.[KQ(!
} ~mAv)JK
private static String[] name={ @smjXeFo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WdQR^'b$
}; A HnXN%m
(^h2'uB
private static Sort[] impl=new Sort[]{ qg_M9xJ
new InsertSort(), zfS0M
new BubbleSort(), 05o +VF;z
new SelectionSort(), mn5y]:;`
new ShellSort(), u!$+1fI>
new QuickSort(), Sv&_LZ-"P
new ImprovedQuickSort(), :SBB3G)|
new MergeSort(), Y.>F fL
new ImprovedMergeSort(), rQE:rVKVh
new HeapSort() eI20)t`j
}; )96tBA%u
pZeJ$3@vk
public static String toString(int algorithm){ 7T[Kjn^{Oj
return name[algorithm-1]; IR_&dWHyc
} {|!> {
2%!yV~Z
public static void sort(int[] data, int algorithm) { r.WQ6h/eZ5
impl[algorithm-1].sort(data); Fa]|Y
} EA#{N<
^l;N;5L
public static interface Sort { iX]tL:,~i
public void sort(int[] data); LN=6u
} *;E\,,Io
8.`*O
public static void swap(int[] data, int i, int j) { },eV?eGj
int temp = data; t,D7X1W
data = data[j]; f2*e&+LjTP
data[j] = temp; WdtZ{H
} $"e$#<g
} 5t=7-