[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; -OKXfN]
} U<'z,Px6
int i1=l; IA}.{zY~|
int i2=mid+1; Kf)$/W4
for(int cur=l;cur<=r;cur++){ 3Gw*K-.
if(i1==mid+1) C/ ]Bx
data[cur]=temp[i2++]; ;$qc@)Uwp
else if(i2>r) AU9:Gu@M/
data[cur]=temp[i1++]; '[HU!8F
else if(temp[i1] data[cur]=temp[i1++]; -Q ];o~
else Vn_>c#B
data[cur]=temp[i2++]; WM=)K1p0u
} $%ww$3
} %Rk0sfLvn
2o W'B^-
} tlI]);iE,
*ODc[k'(
改进后的归并排序: <UGM/+aO
ygUX]*m!
package org.rut.util.algorithm.support; CL t(_!q
VwarU(*
import org.rut.util.algorithm.SortUtil; |t#s h
&rc r>-
/** uF)^mT0D=
* @author treeroot ``kesz
* @since 2006-2-2 Z1(!syg
* @version 1.0 m]{/5L
*/ ^lK!tOeO
public class ImprovedMergeSort implements SortUtil.Sort { yC!>7@m
D?H|O[
private static final int THRESHOLD = 10; Us>
+|4olK$[
/* 4~WSIR-
* (non-Javadoc) 9R&.$5[W(s
* B\;fC's+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ax2#XSCO
*/ ?~]mOv>
public void sort(int[] data) { a^VI)
int[] temp=new int[data.length]; v)*eLX$
mergeSort(data,temp,0,data.length-1); a"k,x-EL(
} Ct3+ga$
1D~B\=LL}
private void mergeSort(int[] data, int[] temp, int l, int r) { ^{E_fQJX
int i, j, k; f uH3C~u7<
int mid = (l + r) / 2; nGTqW/k[+s
if (l == r) Fg2/rC:_
return; cn9=wm\\
if ((mid - l) >= THRESHOLD) E6-~
mergeSort(data, temp, l, mid); &G3$q,`H
else }UG<_bE|
insertSort(data, l, mid - l + 1); e)F_zX
if ((r - mid) > THRESHOLD) KT<N ;[;
mergeSort(data, temp, mid + 1, r); ItAC=/(d
else w7<4D,hk
insertSort(data, mid + 1, r - mid); e.!~7c_z?
}MM:qR
for (i = l; i <= mid; i++) { 2D3mTpw
temp = data; |CBJ8],mT
} Z/;8eb*B7
for (j = 1; j <= r - mid; j++) { Imo?)dYK
temp[r - j + 1] = data[j + mid]; ~AF' 6"A
} T7M];@q
int a = temp[l]; obgO-d9l
int b = temp[r]; 2k`Q+[?{q>
for (i = l, j = r, k = l; k <= r; k++) { j?!/#'
if (a < b) { ~UsE"5
data[k] = temp[i++]; ,JJ1sf2A
a = temp; 3b<;y%
} else { 9a'}j#mJo
data[k] = temp[j--]; n+Ng7
b = temp[j]; OoZv\"}!_
} u$^r(.EV
} :QMpp}G
} 9*CRMkPrd
Z>W&vDeuN
/** ;9uDV-"
* @param data }7qboUGe
* @param l \F7NuG:m,
* @param i xp"F)6
*/ H.[(`wi!I
private void insertSort(int[] data, int start, int len) { pJQ_G`E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ip*UujmNyR
} cs]3Rp^g
} R~#&xfMd.
} 9}d^ll&
} lhF)$M
!@ )JqF.
堆排序： 2W)KfS
h<BTu7a`r
package org.rut.util.algorithm.support; hWr}Uui
m;u:_4
import org.rut.util.algorithm.SortUtil; s 8lfW6
h-*h;Uyc
/** +a'nP=e&
* @author treeroot =jRC4]M})
* @since 2006-2-2 nA+gqY6 6|
* @version 1.0 1]7v3m
*/ p4Xhs@.k
public class HeapSort implements SortUtil.Sort{ kyD*b3MN
NcIr; }
/* (non-Javadoc) k,r}X:<6jz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qgl5Jr.
*/ k_ijVfI9
public void sort(int[] data) { Pm|S>r
MaxHeap h=new MaxHeap(); NF_[q(k'
h.init(data); 2K{)8;^
for(int i=0;i h.remove(); !LpFK0rw
System.arraycopy(h.queue,1,data,0,data.length); 4/&.N]
} .gw6W0\F
8oP"?ew#
private static class MaxHeap{ x\5\KGw16
QV=|' S
void init(int[] data){ <T$rvS
this.queue=new int[data.length+1]; en16hd>^W:
for(int i=0;i queue[++size]=data; AD"L>7
fixUp(size); h{e?Fl
} twql)lbx
} qB3=wFI
@P<Mc)o^
private int size=0; `=I@W
],f%: ?%50
private int[] queue; FW"gj\
? UBE0C
public int get() { 5Yx 7Q:D
return queue[1]; 257q%"
} eg>]{`WQ
oD%B'{Zs4
public void remove() { ;VgB!
SortUtil.swap(queue,1,size--); Yg]!`(db
fixDown(1); Kd3EZo.
} HhB' ^)
file://fixdown b!z=:
private void fixDown(int k) { _RG2I)P
int j; !JPZ7_nn
while ((j = k << 1) <= size) { qD5)AdCGO
if (j < size %26amp;%26amp; queue[j] j++; F6 f
if (queue[k]>queue[j]) file://不用交换 ,<=_t{^
break; t~ z;G%a
SortUtil.swap(queue,j,k); _z&H O
k = j; TiSV`V q
} ??g = `yH
} ]goPjfWvU"
private void fixUp(int k) { /Au7X'}
while (k > 1) { 3>k?-%"
int j = k >> 1; /m+.5Qz9)@
if (queue[j]>queue[k]) V(6Ql j7
break; {o8K&XU#&t
SortUtil.swap(queue,j,k); !]!J"!xg*
k = j; Qy|6A@
} G8OnNI
} 8>ODtKI*
8|IlJiJ~v
} (l:LG"sy\
\Oa11c`6
} .\|}5J9W
{tF)%>\#
SortUtil： e&F=w`F\
vA0f4W 8+
package org.rut.util.algorithm; Rc`zt7hbJ
z6bIv}
import org.rut.util.algorithm.support.BubbleSort; Hr;\}
import org.rut.util.algorithm.support.HeapSort; ~{npG
import org.rut.util.algorithm.support.ImprovedMergeSort; $R/@%U)-o
import org.rut.util.algorithm.support.ImprovedQuickSort; WD?COUEox
import org.rut.util.algorithm.support.InsertSort; 4Pr@<S"U
import org.rut.util.algorithm.support.MergeSort; -y)g}D%
import org.rut.util.algorithm.support.QuickSort; OG2&=~hOz-
import org.rut.util.algorithm.support.SelectionSort; wXUgxa
import org.rut.util.algorithm.support.ShellSort; LKu ,H
#:}mi;{
/** (Z at|R.F
* @author treeroot hE}y/A[
* @since 2006-2-2 9I*`~il>{
* @version 1.0 `'/1Ij+
*/ >twog}%
public class SortUtil { 6g%~~hX
public final static int INSERT = 1; ^ &VN=Y6z
public final static int BUBBLE = 2; uE3xzF
public final static int SELECTION = 3; bODyJ7=[
public final static int SHELL = 4; zirnur1
public final static int QUICK = 5; _qq>-{-Ym
public final static int IMPROVED_QUICK = 6; L ^{C4}x=
public final static int MERGE = 7; NPE7AdB8
public final static int IMPROVED_MERGE = 8; K7]IAV
public final static int HEAP = 9; lX%e
{#}?-X
public static void sort(int[] data) { S)G*+)
sort(data, IMPROVED_QUICK); <+e&E9;>6
} q|N4d9/b
private static String[] name={ ,PZ[CX;H@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]gB:ht
}; q%8Ck)xz
\Gz 79VW
private static Sort[] impl=new Sort[]{ rZG6}<Hx
new InsertSort(), yI_MYL[
new BubbleSort(), XQ$9E?|=
new SelectionSort(), <5sP%Fs)
new ShellSort(), EJJW
new QuickSort(), [fr!J?/@
new ImprovedQuickSort(), ny[\yj4F
new MergeSort(), YEhPAQNj
new ImprovedMergeSort(), eLN[`hJ
new HeapSort() dZ'H'm;,!
}; A7sva@}W
UpCkB}OhR1
public static String toString(int algorithm){ *Au[{sR
return name[algorithm-1]; #=aTSw X
} t{Gc,S!]5
\xexl1_;
public static void sort(int[] data, int algorithm) { _f<#+*y
impl[algorithm-1].sort(data); 55vI^SSA
} zr[|~-
DO9_o9'
public static interface Sort { |bv7N@?e
public void sort(int[] data); l08JL
} BMovl4*5
xY1@Ja
public static void swap(int[] data, int i, int j) { _gI1@uQw
int temp = data; L$ ZZ]?7j
data = data[j]; pJ H@v &a
data[j] = temp; ~X%W2N2
} F`JW&r\
} R'x^Y"