[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; TI'~K}Te
} 51%<N\>/4
int i1=l; B@3>_};Ct
int i2=mid+1; _*(:6,8
for(int cur=l;cur<=r;cur++){ Z}O0DfT;
if(i1==mid+1) =2wy;@f
data[cur]=temp[i2++]; Zfr?(y+3
else if(i2>r) X<"#=u(
data[cur]=temp[i1++]; TwE&5F*
else if(temp[i1] data[cur]=temp[i1++]; qr/N?,
else c_2kHT
data[cur]=temp[i2++]; !I8(Y
} k|^nrjStC
} !91<K{#A{
%hzNkyD)Y
} wa9{Q}wSa
X?"Ro`S
改进后的归并排序: CV,[x[L#{
-aMwC5iR@
package org.rut.util.algorithm.support; \-s'H:
_nnl+S>K
import org.rut.util.algorithm.SortUtil; yIThzyS
[26([H
/** xZ"kJ'C4}
* @author treeroot HaamLu
* @since 2006-2-2 yYTiAvN
* @version 1.0 T1b9Zqc)f
*/ -1u N Z{0
public class ImprovedMergeSort implements SortUtil.Sort { seH#v
0:Lm=9o
private static final int THRESHOLD = 10; l:kF0tj"
{GH 0 J"
/* I1(,J
* (non-Javadoc) )6mv7M{
* mE]W#?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) , v6[#NU_Z
*/ :XZ
public void sort(int[] data) { K`1\3J)
int[] temp=new int[data.length]; ~F]- +|
mergeSort(data,temp,0,data.length-1); Om2 )$(
} "|"bo5M:
MgLz:2 :F
private void mergeSort(int[] data, int[] temp, int l, int r) { M+^+u 1QQ0
int i, j, k; *K\/5Fzl
int mid = (l + r) / 2; 7<?v!vQ}-
if (l == r) |v{a5|<E
return; >b/0i$8
if ((mid - l) >= THRESHOLD) Rf\>bI<.
mergeSort(data, temp, l, mid); c>3W1"
else Hp":r%)
insertSort(data, l, mid - l + 1); .Isg1qrC
if ((r - mid) > THRESHOLD) uoKC+8GA
mergeSort(data, temp, mid + 1, r); 6i\b&
else @*l}2W
insertSort(data, mid + 1, r - mid); 66%kq[
_W*3FH
for (i = l; i <= mid; i++) { Fk 1M5Dm
temp = data; PHD$E s
} 0:nQGX!N
for (j = 1; j <= r - mid; j++) { v *~ yN*
temp[r - j + 1] = data[j + mid]; ]}G(@9
} crC];LMl/
int a = temp[l]; ?(U> )SvF
int b = temp[r]; Hj;j\R >2
for (i = l, j = r, k = l; k <= r; k++) { J2H8r 'T
if (a < b) { KFCzf_P!
data[k] = temp[i++]; f5/ba9nI
a = temp; 'F[QE9]*
} else { t/S~CIA
data[k] = temp[j--]; nS'0i&<{1
b = temp[j]; "$:nz}
} K#";!
} Ef$xum{
} )CXJRo`j0
<<&:BK
/** bU:"dqRm<
* @param data XUUS N
* @param l T0RgCU IV
* @param i F+Lq
*/ Mk[_yqoCO
private void insertSort(int[] data, int start, int len) { z6FG^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8X*6i-j5E
} A"z')
} [N#2uo
} Yq) wE|k/
} (g~&$&pa
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堆排序： +5);"71
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package org.rut.util.algorithm.support; 4U>
ybf`7KEP2A
import org.rut.util.algorithm.SortUtil; bUz7!M$
6eK18*j%H
/** "PJ@Q9n__
* @author treeroot xp>ra2A
* @since 2006-2-2 2lHJ&fck<
* @version 1.0 2fI?P
*/ O&\;BF5:R
public class HeapSort implements SortUtil.Sort{ UTmX"Li
+l&ZN\@0X
/* (non-Javadoc) ]eP&r?B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4( ^Ht
*/ P*R`3Y,
public void sort(int[] data) { P",~8Aci(
MaxHeap h=new MaxHeap(); v*l1"0$
h.init(data); ep,kImT
for(int i=0;i h.remove(); Scs \nF2
System.arraycopy(h.queue,1,data,0,data.length); a{69JY5
} i~.L{K
A^ t[PKM"
private static class MaxHeap{ QSEf
0 Co_,"
void init(int[] data){ U{n 0Z
this.queue=new int[data.length+1]; -5d8j<,
for(int i=0;i queue[++size]=data; f#/v^Ql*
fixUp(size); FrB}2
} JyYg)f
} Z]":xl\7
m_Z%[@L
private int size=0; p?=rQte([
tX&Dum$
private int[] queue; KS1Z&~4
x(5>f9bb
public int get() { z9YC9m)jK
return queue[1]; 6 }qNH29
} Nx;U]O6A
avykg(
public void remove() { W<u63P
SortUtil.swap(queue,1,size--); \qi=Us|=
fixDown(1); _)zSjFX9
} ZVVK:dDgt
file://fixdown j!qO[CJJ
private void fixDown(int k) { W!2(Ph*
int j; Pfe&wA't
while ((j = k << 1) <= size) { S;MS,R
if (j < size %26amp;%26amp; queue[j] j++; g O,X
if (queue[k]>queue[j]) file://不用交换 QrHI}r
break; S3`zB?7,
SortUtil.swap(queue,j,k); o-_0
k = j; `\(Fax
} |u<qbl
} j{0_K+B
private void fixUp(int k) { h~urZXD<
while (k > 1) { k6QQoLb$V
int j = k >> 1; +kd88Fx
if (queue[j]>queue[k]) oXK`=.\
break; J}hi)k
SortUtil.swap(queue,j,k); `BmAu[(e&
k = j; b-@6w(j
} lnEc5J@c>i
} Gyw@+(l
,Si\ky7L
} q<>LK
KtA0 8?B
} c1'OIK C
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SortUtil： bBW(# Q_a
l=`)yc.
package org.rut.util.algorithm; @c,}\"(
!O-q13\Y
import org.rut.util.algorithm.support.BubbleSort; Pv1C o:
import org.rut.util.algorithm.support.HeapSort; xiX~*Zs
import org.rut.util.algorithm.support.ImprovedMergeSort; &$.Vi&{.
import org.rut.util.algorithm.support.ImprovedQuickSort; &%ej=O
import org.rut.util.algorithm.support.InsertSort; $M@SZknm
import org.rut.util.algorithm.support.MergeSort; @f{yx\u/
import org.rut.util.algorithm.support.QuickSort; { KE[8n
import org.rut.util.algorithm.support.SelectionSort; eOt T*
import org.rut.util.algorithm.support.ShellSort; vtc} )s\
^VR1whCrx
/** U{q6_z|c
* @author treeroot \O/EY&
* @since 2006-2-2 ? }|;ai
* @version 1.0 is}o5\JEL
*/ :W_S
public class SortUtil { IpXg2QbN
public final static int INSERT = 1; Sd2R$r
public final static int BUBBLE = 2; yb2*K+Kv
public final static int SELECTION = 3; VjS %!P
public final static int SHELL = 4; wO@b=1j
public final static int QUICK = 5; l!ltgj
public final static int IMPROVED_QUICK = 6; ,--/oP
public final static int MERGE = 7; D9B?9Qt2[
public final static int IMPROVED_MERGE = 8; /ZlW9|
public final static int HEAP = 9; N#Bg`:!
<T[%03
public static void sort(int[] data) { a5{CkM&,(
sort(data, IMPROVED_QUICK); 2lDgvug
} *,-)4)7d
private static String[] name={ Xw!eB?A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W@GcE;#-
}; JAj<*TB.%
U5jY/e_
private static Sort[] impl=new Sort[]{ AMA:hQ
new InsertSort(), Ih!UL:Ckh
new BubbleSort(), BP6;dF5E
new SelectionSort(), PorBB7iL
new ShellSort(), KOv ar0
new QuickSort(), )zlksF
new ImprovedQuickSort(), 2/RK pl &
new MergeSort(), lb2mWsg"
new ImprovedMergeSort(), P1]ucu_y,
new HeapSort() KYD,eVQ
}; ;XSRG*3j~4
?|Fu^eR%X
public static String toString(int algorithm){ R!lNm,i
return name[algorithm-1]; 9-eYCg7C|
} zNuiBLxDs
@g(N!n~
public static void sort(int[] data, int algorithm) { &NZN_%
impl[algorithm-1].sort(data); n=MdbY/k(
} {g@Wd2-J}
Gy.<gyK9
public static interface Sort { [4]lAxrRF
public void sort(int[] data); {H#1wu^]O$
} S&}7jRH1
"Y}f"X|
public static void swap(int[] data, int i, int j) { }OJ*o
int temp = data; m>k j@^SQ
data = data[j]; >~_y\
data[j] = temp; CTp~bGIv!=
} $TU=^W)X
} 6_=qpP-?