[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; pd|KIs%jl
} S<"Fp1#"l
int i1=l; [k6I#v<&
int i2=mid+1; CF '&Yo
for(int cur=l;cur<=r;cur++){ C!VhVOy>d
if(i1==mid+1) Y_JQPup
data[cur]=temp[i2++]; $^ws#}j
else if(i2>r) G#n 4g:K
data[cur]=temp[i1++]; 0X=F(,>9
else if(temp[i1] data[cur]=temp[i1++]; J-v1"7[2GC
else XMrk2]_
data[cur]=temp[i2++]; U)/.wa>
} \Oeo"|
} B.q/}\ ?(
_}R[mr/
} m2j&0z
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改进后的归并排序: /4&gA5BS]
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package org.rut.util.algorithm.support; @8|*Ndx2
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import org.rut.util.algorithm.SortUtil; |C[!A
dHc\M|HCC
/** +OE!Uqnt
* @author treeroot 94"+l@K
* @since 2006-2-2 hmu>s'
* @version 1.0 7Y5r3a}%
*/ [.gk{> #
public class ImprovedMergeSort implements SortUtil.Sort { vd%g'fTy9
n)e2?
private static final int THRESHOLD = 10; LhJUoX
srGOIK.
/* (pxH<k=Ah
* (non-Javadoc) .kT]^rv ;
* 7n7Xyb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XX8HSw!w
*/ 3uLG$`N
public void sort(int[] data) { Q(bOar5
int[] temp=new int[data.length]; {R}F4k
mergeSort(data,temp,0,data.length-1); iW5cEI%tb
} q/#e6;x
Jo5Bmh0
private void mergeSort(int[] data, int[] temp, int l, int r) { YM}a>o
int i, j, k; F]aoTy
int mid = (l + r) / 2; M@Th^yF+8H
if (l == r) :os8"
return; \P<aK$g
if ((mid - l) >= THRESHOLD) ABWn49c.
mergeSort(data, temp, l, mid); Q|'f3\
else J:Cr.K`
insertSort(data, l, mid - l + 1); 4t, 2H"M
if ((r - mid) > THRESHOLD) aLa<zEssz
mergeSort(data, temp, mid + 1, r); D:z'`v0j
else uvId],dQ5
insertSort(data, mid + 1, r - mid); A)f-r
8q^}AT<C
for (i = l; i <= mid; i++) { dli(ckr
temp = data; (` *BZ_
} 1'~Xn 4 f
for (j = 1; j <= r - mid; j++) { 7v5]%%E/
temp[r - j + 1] = data[j + mid]; 3l{V:x!9@
} jIol`WX
int a = temp[l]; ?qgQ)#6
int b = temp[r]; a(gXvgrf[
for (i = l, j = r, k = l; k <= r; k++) { [o)K1>>7
if (a < b) { TSB2]uH
data[k] = temp[i++]; |Y7SP]/`gB
a = temp; +:S`]
} else { cOVj @z
data[k] = temp[j--]; yHeL&H
b = temp[j]; J p'^!
} {L-^J`> G
} EXDDUqZ5\
} L&pR#
CX|W$b)%
/** 1d5%(:@
* @param data /2tA n
* @param l %*R, ceuI
* @param i EF0v!XW
*/ giakEPl
private void insertSort(int[] data, int start, int len) { YYWD\Y`8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k@4N7}
} }y(t')=9
} IW~R{ ]6
} .j]tzX
} j4$nr=d.6
PLCm\Oh$l
堆排序： GA^hev
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package org.rut.util.algorithm.support; aU!}j'5Q
AdDX_\V,*
import org.rut.util.algorithm.SortUtil; thjr1y.e
Z)@vJZ*7(
/** \5ls <=S.
* @author treeroot n7t}G'*Y!^
* @since 2006-2-2 _.5{vGyxr
* @version 1.0 'OY4Q'Z
*/ &Hoc`u
public class HeapSort implements SortUtil.Sort{ >h7(kj:
yE:y[k0E
/* (non-Javadoc) DbMVbgz<e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V]H(;+^P
*/ .?Eb{W)^br
public void sort(int[] data) { L!}!k N:?
MaxHeap h=new MaxHeap(); _2fW/U54_
h.init(data); ;s+/'(*
for(int i=0;i h.remove(); OSBR2Z;=
System.arraycopy(h.queue,1,data,0,data.length); M':-f3aT%
} V:\:[KcL^
csP4Oq\g[
private static class MaxHeap{ A8% e_XA
lc,k-}n
void init(int[] data){ m?e/MQr
this.queue=new int[data.length+1]; "N+4TfXy
for(int i=0;i queue[++size]=data; s)-An(Uw
fixUp(size); { DYY9MG8
} S?688
} 5CI{&E
h FU8iB`Q
private int size=0; }-3 VK%
X=QX9Ux?^
private int[] queue; #Vk?
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public int get() { *AH`ob}
return queue[1]; 4|x_C-@
} *zdD4I=
4C;;V m4~
public void remove() { Fb,*;M1'
SortUtil.swap(queue,1,size--); -P;3BHS$T
fixDown(1); }U}zS@kI
} .j4y0dh33
file://fixdown 72nZ`u
private void fixDown(int k) { ChiIQWFE
int j; <B6md i'R
while ((j = k << 1) <= size) { - Jaee,P
if (j < size %26amp;%26amp; queue[j] j++; ZF7n]LgSc&
if (queue[k]>queue[j]) file://不用交换 g QBS#NY
break; mERkC,$
SortUtil.swap(queue,j,k); Cy-p1s
k = j; ZF>:m>
} -d,D!
} [ja^Bhu
private void fixUp(int k) { Oo|JIr7i
while (k > 1) { b7.7@Ly y
int j = k >> 1; o/-RGLzAo
if (queue[j]>queue[k]) 8m0*89HEu
break; j2G^sj"|
SortUtil.swap(queue,j,k); ]]|#+$ ~
k = j; SdnnXEB7
} )Jt. Z^J<
} 6ALjM-t=V
B- @bU@H
} ag'hHFV
@`[e1KQ
} k$$SbStD
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SortUtil： kFjv'[Y1N
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package org.rut.util.algorithm; }83 8F&
.$\-{)
import org.rut.util.algorithm.support.BubbleSort; 4)iP%%JH
import org.rut.util.algorithm.support.HeapSort; %pVsafV
import org.rut.util.algorithm.support.ImprovedMergeSort; "}()/
import org.rut.util.algorithm.support.ImprovedQuickSort; qc(e3x
import org.rut.util.algorithm.support.InsertSort; )>~jjR
import org.rut.util.algorithm.support.MergeSort; 3EYEd39E
import org.rut.util.algorithm.support.QuickSort; z</C)ObL
import org.rut.util.algorithm.support.SelectionSort; "L.k m
import org.rut.util.algorithm.support.ShellSort; B EwaQvQ!
7;Ze>"W>
/** +3o vO$g
* @author treeroot 2/3yW.C
* @since 2006-2-2 >/-H!jUF]
* @version 1.0 $}vk+.!*1
*/ tav@a)
public class SortUtil { >lIzeEW#
public final static int INSERT = 1; fr~Eb'8
public final static int BUBBLE = 2; 3P!OP{`
public final static int SELECTION = 3; X3sAy(q
public final static int SHELL = 4; c#x~x
public final static int QUICK = 5; <lzC|>BG
public final static int IMPROVED_QUICK = 6; JWHsTnB
public final static int MERGE = 7; 82FEl~,^E
public final static int IMPROVED_MERGE = 8; 3w^W6hN)
public final static int HEAP = 9; syu/"KY^!
^:/c<(DQD
public static void sort(int[] data) { '`^~Zy?c
sort(data, IMPROVED_QUICK); .6MG#N
} hTa X@=Ra
private static String[] name={ YT-ua{.^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qt9jZtx
}; =|J*9z;
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private static Sort[] impl=new Sort[]{ =mLp g4
new InsertSort(), 5QqU.9M
new BubbleSort(), ;?q(8^A
new SelectionSort(), u^xnOVE
new ShellSort(), UG\2wH_
new QuickSort(), k2eKs*WLC
new ImprovedQuickSort(), +C\79,r
new MergeSort(), e(wc [bv
new ImprovedMergeSort(), by1q"\-,
new HeapSort() NK|U:p2H
}; u>;aQtK~
r)~?5d
public static String toString(int algorithm){ XHv m{z=
return name[algorithm-1]; qGq]E`O
} A< .5=E,/
L:C/PnIV
public static void sort(int[] data, int algorithm) { d"5_x]Z;
impl[algorithm-1].sort(data); IZrcn
} Ch{6=k bK
Lu^uY7 ?}
public static interface Sort { <k[_AlCmsg
public void sort(int[] data); u$tst_y-
} BcQUD?LC`
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public static void swap(int[] data, int i, int j) { W'"hjQ_
int temp = data; uPl7u1c
data = data[j]; m>+
data[j] = temp; x .@O]}UH
} K 'I6iCrD
} xJw" 8V<