[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; l+<AM%U\ V
} \!Ap<
int i1=l; } v3w-
int i2=mid+1; NsL!AAN[V
for(int cur=l;cur<=r;cur++){ QzV%m0
if(i1==mid+1) B8?j"AF
data[cur]=temp[i2++]; muIJeQ.C
else if(i2>r) co>IJzg
data[cur]=temp[i1++]; 5ih5=qX
else if(temp[i1] data[cur]=temp[i1++]; :VlMszy}B3
else rh6 e
data[cur]=temp[i2++]; k3&/Ei5
} agnEYdM_
} k~=P0";
]N6UY
} Bn*QT:SKC
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改进后的归并排序: FQ]5W |e
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package org.rut.util.algorithm.support; [.nkNda5)v
])vqXjN6"
import org.rut.util.algorithm.SortUtil; j&`D{z-c~
NX?6 (lO,
/** ^2"w5F
* @author treeroot d@{#F"o
* @since 2006-2-2 nC#SnyUO
* @version 1.0 b:x*Hjf
*/ BJnysQ
public class ImprovedMergeSort implements SortUtil.Sort { ,~XAV ;+
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private static final int THRESHOLD = 10; 'o1lJ?~kH
VoNk.h"T
/* UX)QdT45Mh
* (non-Javadoc) %TzdpQp"
* G:Nwi=vN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9oVprd>%@
*/ 6bBNC2K$-
public void sort(int[] data) { 6V-JyTcxGI
int[] temp=new int[data.length]; CjLiLB
mergeSort(data,temp,0,data.length-1); |S3wCG
} ?r^>Vk}
gA&`vnNP
private void mergeSort(int[] data, int[] temp, int l, int r) { oC(.u?
int i, j, k; >;~ia3
int mid = (l + r) / 2; /.:&9 c
if (l == r) }*vO&J@z
return; 36yIfC,
if ((mid - l) >= THRESHOLD) 4JGU`L:~
mergeSort(data, temp, l, mid); b&.3uls6
else b R9iqRbn
insertSort(data, l, mid - l + 1); FyRr/0C>
if ((r - mid) > THRESHOLD) P(i E"KH;
mergeSort(data, temp, mid + 1, r); @|@6pXR.
else ='fN xabB
insertSort(data, mid + 1, r - mid); Q6fPqEX=
)7a 4yTg!~
for (i = l; i <= mid; i++) { [ejl #'*5
temp = data; tdnd~WSR
} H2E'i\
for (j = 1; j <= r - mid; j++) { XF99h&;9
temp[r - j + 1] = data[j + mid]; saR9_ ux
} iL3k8:x
int a = temp[l]; wK Je^7
int b = temp[r]; zc!q a"4yM
for (i = l, j = r, k = l; k <= r; k++) { T_~xDQ`v
if (a < b) { 8<Ex`
data[k] = temp[i++]; BDPF>lPf<
a = temp; GD#W=O
} else { M.KXDD#O
data[k] = temp[j--]; e)]DFP[n
b = temp[j]; TJkWL2r0c
} da5fKK/s
} RzqU`<//
} 3y-P-NI~=
2m2$jp0
/** D?r% Y
* @param data 420cbD3a
* @param l $>=w<=r|;
* @param i BmCBC,j<v>
*/ XC\'8hL:
private void insertSort(int[] data, int start, int len) { Rlx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :6}cczQE|O
} RBOhV/f
} ~D!Y] SK
} GlaZZ,
} #L xfE<^
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堆排序： +!<{80w
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package org.rut.util.algorithm.support; vjYG>YhV
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import org.rut.util.algorithm.SortUtil; B \>W
cb9@ 0^-
/** 73(5.'F
* @author treeroot " {Nw K
* @since 2006-2-2 x DX_s:A
* @version 1.0 LQ4F/[1}
*/ {aWfD XB1
public class HeapSort implements SortUtil.Sort{ B-aJn8>/
szD BfGd%j
/* (non-Javadoc) ceNJXK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nF{>RD
*/ _tVrLb7`s
public void sort(int[] data) { 8^"P'XQ
MaxHeap h=new MaxHeap(); {m5R=22^
h.init(data); mS >I#?
for(int i=0;i h.remove(); r;OE6}L>
System.arraycopy(h.queue,1,data,0,data.length); _@ @"'
} =!PUKa3f<
;#6j9M0
private static class MaxHeap{ ~n!7 ?4%U
`jH0FJQ
void init(int[] data){ -Khb
this.queue=new int[data.length+1]; HZzdelo
for(int i=0;i queue[++size]=data; &?B\(?*
fixUp(size); xm}`6B^f
} nv"D
} K6z-brvw"
)z2hyGX
private int size=0; "Kt[jV;6
)ia$pes
private int[] queue; z}*74lhF
vCtag]H2@
public int get() { _K|513I
return queue[1]; z3p#`
} oi}\;TG
OL)M`eVQ'
public void remove() { 3ZU<u;
SortUtil.swap(queue,1,size--); Z )dz
fixDown(1); 9{V54ue;
} zhFk84
file://fixdown FR@##i$
private void fixDown(int k) { >QM$ NIf@
int j; I@9k+JB
while ((j = k << 1) <= size) { aj*%$!SU+
if (j < size %26amp;%26amp; queue[j] j++; !t92_y3
if (queue[k]>queue[j]) file://不用交换 )0NE_AZ?
break; &`4v,l^Zi6
SortUtil.swap(queue,j,k); ZICcZG_y
k = j; =1Mh%/y
} Dx<CO1%z-
} l0 H,TT~2
private void fixUp(int k) { iTt"Ik'
while (k > 1) { -k p~pe*T
int j = k >> 1; [UVxtMJ
if (queue[j]>queue[k]) QJ`#&QRp
break; @83h/Wcxd
SortUtil.swap(queue,j,k); ,x?H]a)
k = j; ^IxT.g
} 0(|BQ'4~H
} p1Q[c0NMK
.[hQ#3)W
} j[XA"DZR<
/vl]Oa&U
} sD$ \!7:b
~ySmN}3~'
SortUtil： L!3AiAnr
M#JOX/
package org.rut.util.algorithm; PXcpROg56
22\Buk}?
import org.rut.util.algorithm.support.BubbleSort; dhN[\Z%
import org.rut.util.algorithm.support.HeapSort; }(AUe5aw`G
import org.rut.util.algorithm.support.ImprovedMergeSort; ~F*pV*
import org.rut.util.algorithm.support.ImprovedQuickSort; ch<Fi%)
import org.rut.util.algorithm.support.InsertSort; mD:d,,~
import org.rut.util.algorithm.support.MergeSort; />XfK,c-
import org.rut.util.algorithm.support.QuickSort; v#.FK:u}
import org.rut.util.algorithm.support.SelectionSort; WIXzxI<)
import org.rut.util.algorithm.support.ShellSort; yUQ;tTI
Dn _D6H
/** xTX\%s|
* @author treeroot v@;:aN
* @since 2006-2-2 g/so3F%v .
* @version 1.0 -Q;5A;sr2
*/ |v8>22y
public class SortUtil { !&TbE@Xk
public final static int INSERT = 1; )$yqJ6y5
public final static int BUBBLE = 2; geWis(#J
public final static int SELECTION = 3; YL&$cT]1
public final static int SHELL = 4; VG+Yhm<SL
public final static int QUICK = 5; bslv_OxJ
public final static int IMPROVED_QUICK = 6; BnqAv xX
public final static int MERGE = 7; Y>EwU
public final static int IMPROVED_MERGE = 8; fyx-VXu
public final static int HEAP = 9; ?)1h.K1}M
/^qCJp`
public static void sort(int[] data) { #O^H?3Q3
sort(data, IMPROVED_QUICK); q^Lj)zmnK
} @g[p>t> *
private static String[] name={ wCeSs=[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =ALy.^J=
}; J$&!Y[0
P /wc9Yt
private static Sort[] impl=new Sort[]{ IoJkM-^H&)
new InsertSort(), Vlce^\s;
new BubbleSort(), )rz4IfE
new SelectionSort(), Pf6rr9
new ShellSort(), wsP3hE' ]
new QuickSort(), {8Hrb^8!
new ImprovedQuickSort(), !li Q;R&
new MergeSort(), %fh ,e5(LT
new ImprovedMergeSort(), -n!.PsGO>
new HeapSort() j)C%zzBu(
}; l+bP48
oj$D3
public static String toString(int algorithm){ ,y,NVF
return name[algorithm-1]; w@nN3U+
} %#02Z%?%
Ne@Iv)g?
public static void sort(int[] data, int algorithm) { zkI\ji
impl[algorithm-1].sort(data); wX#=l?,K
} :Py/d6KK
nBaY|
public static interface Sort { KKa"Ba$g
public void sort(int[] data); D._q'v<
} :bW}*0b-
Vg\EAs>f
public static void swap(int[] data, int i, int j) { }a"T7y23
int temp = data; 8 ]dhNA5
data = data[j]; C:_!zY'z
data[j] = temp; j?+FS`a!
} ToCB*GlL
} +0.$w