[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; r=w%"3vb^
} 7]v-2 *
int i1=l; gvU6p[D
int i2=mid+1; +.R-a+y3
for(int cur=l;cur<=r;cur++){ 8p211MQ<
if(i1==mid+1) 3Q]MT
data[cur]=temp[i2++]; q@!:<Ra,){
else if(i2>r) b]Y,& 8}[+
data[cur]=temp[i1++]; & aLR'*]6
else if(temp[i1] data[cur]=temp[i1++]; OKU P
else !.J~`Y'd_
data[cur]=temp[i2++]; cQ8:;-M
} y1'/@A1
} 53T2w,?
2~@=ua[|=5
} K7l{&2>?
AHA*yC
改进后的归并排序: .6"7Xxe]<
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package org.rut.util.algorithm.support; )3 r1; ^W
d}=p-s.GA
import org.rut.util.algorithm.SortUtil; ,\m c.80
.U3p~M+
/** f*5"Jh@
* @author treeroot v8X&H
* @since 2006-2-2 ?)X@4Jem
* @version 1.0 W#wM PsB
*/ "Dk:r/
public class ImprovedMergeSort implements SortUtil.Sort { Ww p^dx`!
TB[vpTC9)
private static final int THRESHOLD = 10; E7<:>Uh
`Q8D[
/* !^7:Rr_
* (non-Javadoc) [Vf|4xcD
* m88~+o<G%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B%pvk.`
*/ xn@jL;+<-
public void sort(int[] data) { Qh[t##I/
int[] temp=new int[data.length]; w#1dO~
mergeSort(data,temp,0,data.length-1); t}tKm
} 4Klfnki
X"0Q)
private void mergeSort(int[] data, int[] temp, int l, int r) { f/B--jq
int i, j, k; ~4^e a
int mid = (l + r) / 2; g3Q #B7A
if (l == r) Yru[{h8hw`
return; (NQ[AypMI
if ((mid - l) >= THRESHOLD) ;H=6u
mergeSort(data, temp, l, mid); 2ya`2 m
else *O5+?J Z!
insertSort(data, l, mid - l + 1); Q.\>+4]1&&
if ((r - mid) > THRESHOLD) QD<4(@c5|
mergeSort(data, temp, mid + 1, r); ?*@h]4+k'
else dF,FH-
insertSort(data, mid + 1, r - mid); 5^dw!^d
`R> O5Rv
for (i = l; i <= mid; i++) { t5k&xV=~ #
temp = data; E;4a(o]{t
} RFC;1+Jn
for (j = 1; j <= r - mid; j++) { ts]7 + 6V
temp[r - j + 1] = data[j + mid]; .9xGLmg
} Ae#6=]V+^
int a = temp[l]; MH?B.2
int b = temp[r]; r Lh h
for (i = l, j = r, k = l; k <= r; k++) { =<05PB
if (a < b) { _:L*{=N
data[k] = temp[i++]; .T|NB8 rS
a = temp; xD=D *W
} else { rYJ))@
data[k] = temp[j--]; R}>Do=hAO
b = temp[j]; ,gvX ~k
} !D3}5A1,
} D:(f"
} >DRs(~|V#
.%rR
/** _D9=-^
* @param data ge[i&,.&z
* @param l ?5Fj]Bk]
* @param i 0Nu]N)H5<l
*/ ,&=`T7i
private void insertSort(int[] data, int start, int len) { x\rZoF.NQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [f0HUbPX
} }'W^Ki$
} | #Pc e
} qM0MSwvC=
} 76b7-Nj"
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堆排序： &EPEpN R
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package org.rut.util.algorithm.support; ([Aq
IJ8DN@w9
import org.rut.util.algorithm.SortUtil; :RsPGj6
cPcV[6)5K9
/** Yg[IEy
* @author treeroot S nHAY<
* @since 2006-2-2 l5[xJH
* @version 1.0 ".%LBs~$
*/ ;ZJ,l)BNO
public class HeapSort implements SortUtil.Sort{ x]oQl^F
Q*.FUV&;
/* (non-Javadoc) /aG>we
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `5Btg. &
*/ hD1AK+y
public void sort(int[] data) { F9\Ot^~
MaxHeap h=new MaxHeap(); GZEonCk[&
h.init(data); (J&Xo.<Z-
for(int i=0;i h.remove(); mM*yv
System.arraycopy(h.queue,1,data,0,data.length); lrhAO"/1
} k+[KD>;1
+ca296^
private static class MaxHeap{ Nr9[Vz?$P
gKN_~{{OD
void init(int[] data){ b3xkJ&Z
this.queue=new int[data.length+1]; j/D)UWkR
for(int i=0;i queue[++size]=data; \`&pk-uW
fixUp(size); P(epG?Qg
} _}@n_E
} ?(q*U!=
Vb^s 'k
private int size=0; 4i/q^;`
0>=)
private int[] queue; #2jn4>
*\KMkx
public int get() { Hi_Al,j:
return queue[1]; vvAk<[
} NP`s[
15o.j!S
public void remove() { _c8.muQ<
SortUtil.swap(queue,1,size--); S7ehk*`
fixDown(1); S}^s5ztm
} 0 jP00
file://fixdown xY0QGQca
private void fixDown(int k) { .k`*$1?73x
int j; s2?,'es
while ((j = k << 1) <= size) { 5 ?~-Vv31s
if (j < size %26amp;%26amp; queue[j] j++; _MbVF>JOx
if (queue[k]>queue[j]) file://不用交换 &8+6!TN7
break; P9"D[uz
SortUtil.swap(queue,j,k); #)A?PO2
k = j; ckN(`W,xp
} CS5jJi"pD3
} {]\uR-a(o
private void fixUp(int k) { 3Ge<G
while (k > 1) { AKKU-5 B9c
int j = k >> 1; G^rh*cb K
if (queue[j]>queue[k]) U.Chf9a-
break; .8qzU47E
SortUtil.swap(queue,j,k); 5Vnr"d
k = j; (U'7Fc
} z]l-?>Zbg
} V87ee,
,eeL5V
} +%}5{lu_e
B N*,!fx
} IEoR7:
t7oz9fSz=?
SortUtil： rfXF 01I
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package org.rut.util.algorithm; )fd-IYi-3
Rhv".epz
import org.rut.util.algorithm.support.BubbleSort; t6bWSz0
import org.rut.util.algorithm.support.HeapSort; H"FflmUO
import org.rut.util.algorithm.support.ImprovedMergeSort; I"cQ5gF?A
import org.rut.util.algorithm.support.ImprovedQuickSort; x-V' 0-#U>
import org.rut.util.algorithm.support.InsertSort; lv\F+?]a
import org.rut.util.algorithm.support.MergeSort; +?j?|G
import org.rut.util.algorithm.support.QuickSort; fteyG$-s
import org.rut.util.algorithm.support.SelectionSort; i[ Gw7'f
import org.rut.util.algorithm.support.ShellSort; !v5sWVVR
86[RH!e
/** <[3lV)~t
* @author treeroot UQ$\ an'
* @since 2006-2-2 ;%rs{XO9
* @version 1.0 oX2DFgz
*/ lYZ@a4TA
public class SortUtil { GrLM${G
public final static int INSERT = 1; c(Uj'uLc
public final static int BUBBLE = 2; U)`3[fo
public final static int SELECTION = 3; cB|Cy{%
public final static int SHELL = 4; hDB`t $
public final static int QUICK = 5; yToT7 X7F7
public final static int IMPROVED_QUICK = 6; e1`)3-f
public final static int MERGE = 7; +%e%UF@
public final static int IMPROVED_MERGE = 8; k\Z;Cmh>
public final static int HEAP = 9; neB.Wu~WH
+2V%'{:
public static void sort(int[] data) { \}u7T[R=`
sort(data, IMPROVED_QUICK); Owh*KY:
} igRDt{}
private static String[] name={ 9!O+Ryy?\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KF:]4`$
}; lk*0c{_L
{m+S{dWp
private static Sort[] impl=new Sort[]{ "]SJbuzh
new InsertSort(), %|`:5s-T%
new BubbleSort(), $dx1[V+_
new SelectionSort(), 6zp@#vYI
new ShellSort(), 6"7:44O;G
new QuickSort(), (!_X:+0_
new ImprovedQuickSort(), s=q%:uCO
new MergeSort(), sxN>+v11z
new ImprovedMergeSort(), c?p0#3%L#
new HeapSort() 1%SJ1oY
}; [NCXn>Z
+eDN,iv
public static String toString(int algorithm){ s]F?=yEp
return name[algorithm-1]; iJCY /*C}
} f*|8n$%
ubzb
public static void sort(int[] data, int algorithm) { {hvQ<7b
impl[algorithm-1].sort(data); fz<|+(_>J
} EBj,pk5M
d739UhKC
public static interface Sort { rSF;Lp)}
public void sort(int[] data); %67G]?EXB
} r{R[[]p
w!B,kqTG
public static void swap(int[] data, int i, int j) { 6:|!1Pg5
int temp = data; B c,"12
data = data[j]; fw1;i
data[j] = temp; v|4STR
} nxn[ ~~
} ?8wwd!)x%