[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; ]h=5d09z
} @= =)
int i1=l; $*LBZcL
int i2=mid+1; sZ7~AJ
for(int cur=l;cur<=r;cur++){ VF b
if(i1==mid+1) )eqF21\
data[cur]=temp[i2++]; 6urU[t1
else if(i2>r) 6'.)z,ts
data[cur]=temp[i1++]; `U|zNizO
else if(temp[i1] data[cur]=temp[i1++]; 0cVxP)J+
else mIPDF1=)
data[cur]=temp[i2++]; KD\sU6
} \ H#"
} l?YO!$
>YsM'.EFD
} 7\ZSXQy1W
g_A#WQyh\'
改进后的归并排序: 2m} bddS
e,Y<$kPV
package org.rut.util.algorithm.support; .}uri1k"@k
W$`#X
import org.rut.util.algorithm.SortUtil; U0iV E+)Bt
jw 5 U-zi
/** t;-F]
* @author treeroot X[f)0w%
* @since 2006-2-2 ~B?Wg!
* @version 1.0 2$`Y 4b3t
*/ zL3zvOhu}
public class ImprovedMergeSort implements SortUtil.Sort { `M. I.Z_
%<'.c9u5
private static final int THRESHOLD = 10; 6eA)d#
I6gduvkXi4
/* Xr'b{&
* (non-Javadoc) jSRi
* UX<)hvKj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HgBu:x?&
*/ SqdI($F\:
public void sort(int[] data) { -M_>]ubG
int[] temp=new int[data.length]; xI/8[JW*
mergeSort(data,temp,0,data.length-1); s:(z;cj/
} 'KT(;Vof
2-Wy@\
private void mergeSort(int[] data, int[] temp, int l, int r) { >oaL-01i
int i, j, k; o^MoU2c
int mid = (l + r) / 2; 3 TTQff
if (l == r) zSu,S4m_;
return; K5t.OAA:
if ((mid - l) >= THRESHOLD) E7_OI7C
mergeSort(data, temp, l, mid); '#eT
else {E7STLQ_%
insertSort(data, l, mid - l + 1); H SGz-
if ((r - mid) > THRESHOLD) ,A)Z.OWOq
mergeSort(data, temp, mid + 1, r); ET 0(/Zz
else -YmIRocx
insertSort(data, mid + 1, r - mid); 2JcP4!RD
3 `mtc@*
for (i = l; i <= mid; i++) { >,I'S2_Zl
temp = data; #6l(2d
} O6ugN-d>
for (j = 1; j <= r - mid; j++) { c@)?V>oe
temp[r - j + 1] = data[j + mid]; &%8IBT
} }$r]\v
int a = temp[l]; N93R(x)%
int b = temp[r]; xU6dRjYhH9
for (i = l, j = r, k = l; k <= r; k++) { 412E7
if (a < b) { hE$3l+
data[k] = temp[i++]; |JP'j1 Ka
a = temp; e@ $|xa")
} else { M)AvcZNs
data[k] = temp[j--]; h@\HPYi#.
b = temp[j]; b!`Ze~V
} U~t!
} ]VE3u_kR
} o~q.j_Sa
-5|el3%)
/** qDz[=6BF
* @param data ir>+p>s.
* @param l |F<%gJ
* @param i vts"
*/ c': 4e)
private void insertSort(int[] data, int start, int len) { SBf=d<j 1)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q9B!0G.-bs
} -mmQ]'.0
} kC6Y?g
} o_[~{@RoR
} 2;3&&yK2b
W- nS{v(
堆排序： fwMYEj
Ro<x#Uo
package org.rut.util.algorithm.support; [McqwU/Q
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import org.rut.util.algorithm.SortUtil; csxn"Dz\
.tyV=B:h
/** @ 'N$5
* @author treeroot 'zT7$ .L
* @since 2006-2-2 e7\gd\
* @version 1.0 p=Leoc1
*/ UvB\kIH
public class HeapSort implements SortUtil.Sort{ ]#rV]As
E}a.qM'
/* (non-Javadoc) 4^4T#f2=e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B4+c3M\$V
*/ Qu7ML]e?z
public void sort(int[] data) { 5 wN)N~JE
MaxHeap h=new MaxHeap(); PYY<
h.init(data); !r/~D |
for(int i=0;i h.remove(); G\,B*$3
System.arraycopy(h.queue,1,data,0,data.length); AN[pjC<
} pS7y3(_
61OlnmvE
private static class MaxHeap{ 8x7TK2r
qe(C>qjMbG
void init(int[] data){ '&K' 0qG
this.queue=new int[data.length+1]; C=U4z|Ym
for(int i=0;i queue[++size]=data; WX_g
fixUp(size); #UI`+2w
} m(kv:5<>
} R\#5;W^
3pL4Zhf
private int size=0; QR8]d1+GV
nGc'xQy0
private int[] queue; 6cbV[!BL
TeR bW
public int get() { !bnnUCTb\
return queue[1]; H!6&'=c{k
} 2e3AmR@*
Az#kE.8b*A
public void remove() { g}a+%Obb
SortUtil.swap(queue,1,size--); IDh`*F
fixDown(1); VsK8:[Al
} HJpx,NU'
file://fixdown ,nPnH1vb
private void fixDown(int k) { a[sdYZ
int j; US9@/V*2
while ((j = k << 1) <= size) { M\IdQY-c
if (j < size %26amp;%26amp; queue[j] j++; yOb']
if (queue[k]>queue[j]) file://不用交换 EqIs&){
break; FJ?]|S.?,
SortUtil.swap(queue,j,k); Fy$C._C$
k = j; 7*Zm{r@u
} L5 Ai
} (R RRG;*n#
private void fixUp(int k) { (r}StR+
while (k > 1) { n%~r^C_
int j = k >> 1; qxZf!NX5
if (queue[j]>queue[k]) rfSEL 57'
break; Py+ B 2G|
SortUtil.swap(queue,j,k); =>A}eR1Y
k = j; 1}ifJ~)5S
} F%%mcmHD#
} I{%(G(
JlEfUg#*
} 1UB.2}/:
`G*fx=N
} ;9J6)zg !n
~52'iI)Mw
SortUtil： < mFUT
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package org.rut.util.algorithm; "(';UFa
)RWukr+
import org.rut.util.algorithm.support.BubbleSort; jgkY^l
import org.rut.util.algorithm.support.HeapSort; vJx( lU`Y
import org.rut.util.algorithm.support.ImprovedMergeSort; j[t2Bp
import org.rut.util.algorithm.support.ImprovedQuickSort; ^ ~Tn[w W_
import org.rut.util.algorithm.support.InsertSort; N1vA>(2A
import org.rut.util.algorithm.support.MergeSort; ZR{YpLFQ
import org.rut.util.algorithm.support.QuickSort; $V/Ke
import org.rut.util.algorithm.support.SelectionSort; b!"FM/%
import org.rut.util.algorithm.support.ShellSort; U2Ky4UFm
c+whpQ=01
/** hOdU%
* @author treeroot v`6vc)>8
* @since 2006-2-2 @bnw$U`+
* @version 1.0 YNp-A.o W@
*/ 0B~x8f
public class SortUtil { u:wijkx
public final static int INSERT = 1; MdTu722
public final static int BUBBLE = 2; ;2sP3!*
public final static int SELECTION = 3; KWi|7z(L=
public final static int SHELL = 4; %S>6Q^B
public final static int QUICK = 5; C 8d9(u
public final static int IMPROVED_QUICK = 6; PdRDUG{Jy
public final static int MERGE = 7; vP%:\u:{
public final static int IMPROVED_MERGE = 8; #9qX:*>h
public final static int HEAP = 9; z> N73 u
2Z`Jr/
public static void sort(int[] data) { Ms+SJ5Lg
sort(data, IMPROVED_QUICK); !rG-[7K
} 6eNBldP!
private static String[] name={ bp}]'NA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ngm/5Lc
}; 8'v:26
n# FkgXP$
private static Sort[] impl=new Sort[]{ ._.Qf<7
new InsertSort(), Yb:F,d-Ya
new BubbleSort(), swLNNA.
new SelectionSort(), 'Q.5`o
new ShellSort(), 0AhUH|]
new QuickSort(), 0p\Kf(|E*6
new ImprovedQuickSort(), IZd~Am3f
new MergeSort(), sLK$H|%>m
new ImprovedMergeSort(), *WWDwY@!u
new HeapSort() =">0\#
}; lr -+|>M)
=65XT^
public static String toString(int algorithm){ WaE%g
return name[algorithm-1]; z`]:\j'O3"
} NZwi3
Ov.oyke4
public static void sort(int[] data, int algorithm) { J*^ i=y
impl[algorithm-1].sort(data); eX0[C0#
} <LX-},?P
dzV2;
public static interface Sort { ]XYD2fR2qA
public void sort(int[] data); 98UI]? 4
} HisH\z/i5)
3h.,7,T
public static void swap(int[] data, int i, int j) { AeEdqX)
int temp = data; 71[?AmxV
data = data[j]; @u/CNx,`X
data[j] = temp; 9;{(.K
} c8mh#Tbl
} .gC.T`/m