[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; =jB08A
} =|3fs7
int i1=l; na9sm
int i2=mid+1; [0"'T[ok
for(int cur=l;cur<=r;cur++){ .pvi!NnL-
if(i1==mid+1) yW$0\E6<r
data[cur]=temp[i2++]; Hemq+]6^
else if(i2>r) |<:vY
data[cur]=temp[i1++]; sZx/Ee
else if(temp[i1] data[cur]=temp[i1++]; &f^,la
else ;\f gF@
data[cur]=temp[i2++]; $STaQ28C
} UrqRx?#
} \v'p/G)g
0NS<?p~_S
} ;W>k@L
b )B? F
改进后的归并排序: ^J$2?!~
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package org.rut.util.algorithm.support; ;kY(<{2
&*+'>UEe5
import org.rut.util.algorithm.SortUtil; "rx-_uK*
O^oWG&Y;v
/** vQ;Ex
* @author treeroot 9I6a"PGDb
* @since 2006-2-2 HZ'_r cv
* @version 1.0 0u;4%}pD
*/ |Y?HA&
public class ImprovedMergeSort implements SortUtil.Sort { ;M)QwF1
z6*X%6,8
private static final int THRESHOLD = 10; N@t|7~
FoN|i"*l
/* ;lHr =e7
* (non-Javadoc) R}O_[
* $<}$DH_Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '.:z&gSqx0
*/ `{dm;j5/y
public void sort(int[] data) { XD.)Dl8
int[] temp=new int[data.length]; E*]bgD7V
mergeSort(data,temp,0,data.length-1); a{L d
} Xu%'Z".>:
MF5[lK9e
private void mergeSort(int[] data, int[] temp, int l, int r) { C{U?0!^
int i, j, k; RZXjgddL
int mid = (l + r) / 2; \G*0"%!U
if (l == r) =ALTUV3/q
return; bbE!qk;hEP
if ((mid - l) >= THRESHOLD) ?l9XAWt\
mergeSort(data, temp, l, mid); D]zwl@sRX:
else nAv#?1cjz
insertSort(data, l, mid - l + 1); aDU<wxnSvO
if ((r - mid) > THRESHOLD) k$blEa4
mergeSort(data, temp, mid + 1, r); Ff)8Q.m
else i<#QW'R(
insertSort(data, mid + 1, r - mid); h1de[q)
16=sij%A
for (i = l; i <= mid; i++) { Sc;BCl{=|
temp = data; 4K\G16'$v
} ~E17L]ete
for (j = 1; j <= r - mid; j++) { 6 (]Dh;gC
temp[r - j + 1] = data[j + mid]; _852H$H\
} EV]1ml k$
int a = temp[l]; hgPa6Kd
int b = temp[r]; fD[*_^;h)
for (i = l, j = r, k = l; k <= r; k++) { F1*>y
if (a < b) { IxY|>5z
data[k] = temp[i++]; b,7k)ND1F
a = temp; !2%HhiB'
} else { ,o86}6Ag
data[k] = temp[j--]; `dq,>HdW
b = temp[j]; MTuV^0%jD
} NPy&OcRl
} rC5 p-B%
} ,E S0NA
C5o#i*|
/** Y]'Z7<U}*E
* @param data Va"0>KX
* @param l M:Pc,
* @param i xF!,IKlBBp
*/ LSL/ZvSP
private void insertSort(int[] data, int start, int len) { akp-zn&je
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =$'6(aDH
} f6hnTbJ
} +$ 'Zf0U
} &u$Q4
} 'DP1,7
75T%g!c#
堆排序： (7wc*#}
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package org.rut.util.algorithm.support; M\uiq38
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import org.rut.util.algorithm.SortUtil; 11Q1AN
Ag-(5:
/** 8\&X2[oAD
* @author treeroot XO.jl"xu
* @since 2006-2-2 slCx w$
* @version 1.0 }Y12
*/ 'OITI TM
public class HeapSort implements SortUtil.Sort{ -*1d!
f,U.7E
/* (non-Javadoc) UXJeAE-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &*M!lxDN
*/ =W(Q34
public void sort(int[] data) { n\mO6aJ
MaxHeap h=new MaxHeap(); I9|mG'
h.init(data); W!Gq.M
for(int i=0;i h.remove(); 8'HEms
System.arraycopy(h.queue,1,data,0,data.length); o_izl\
} 03$mYS_?
R`NYEptJ
private static class MaxHeap{ t%d Z-Ym
0yk]o5a++
void init(int[] data){ rD*jp6Cl
this.queue=new int[data.length+1]; cN/6SGHK
for(int i=0;i queue[++size]=data; xG~P+n7t5$
fixUp(size); ER%^!xA
} [_BP)e
} d[iQ`YW5
g|o,uD
private int size=0; qU \w=
`'DmDg
private int[] queue; 5AFJC?
k =>oO9`
public int get() { .YtKS
return queue[1]; w'>pY
} R$R*'l
!z\h|wU+
public void remove() { j*|VctM
SortUtil.swap(queue,1,size--); =/@D8{pU
fixDown(1); 0{5w 6
} ~nmoz/L
file://fixdown &l}^iP'%!
private void fixDown(int k) { aC]$k'71
int j; /2&c$9=1
while ((j = k << 1) <= size) { LQ@"Xe]5
if (j < size %26amp;%26amp; queue[j] j++; u+9hL4
if (queue[k]>queue[j]) file://不用交换 k R?qb6
break; 1I%w?^sm_
SortUtil.swap(queue,j,k); >xN .F/[K
k = j; M[NV)q/)
} j * %
} 'NWfBJm
private void fixUp(int k) { &h}#HS>l
while (k > 1) { iDpSj!x/_
int j = k >> 1; mVj9,q0
if (queue[j]>queue[k]) ./\@Km?
break; z0d.J1VW
SortUtil.swap(queue,j,k); 34f?6K1c
k = j; *IB4[6
} pE`})/?\*
} D,k6$`
" s,1%Ltt
} GV1pn) 4
oh4E7yN
} #NQMy:JHD)
.j ?W>F
SortUtil： !Z1@}`V&;
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package org.rut.util.algorithm; =7?4eYHC
l5~os>
import org.rut.util.algorithm.support.BubbleSort; 4VHn \
import org.rut.util.algorithm.support.HeapSort; ><4<yj1
import org.rut.util.algorithm.support.ImprovedMergeSort; QFA8N
import org.rut.util.algorithm.support.ImprovedQuickSort; T~-ycVc
import org.rut.util.algorithm.support.InsertSort; ,<.V7(|t)
import org.rut.util.algorithm.support.MergeSort; _5w]a 2
import org.rut.util.algorithm.support.QuickSort; D ;RiGW4
import org.rut.util.algorithm.support.SelectionSort; 9[#pIPxNK
import org.rut.util.algorithm.support.ShellSort; |NlO7aQ>2H
~?l | [
/** ~$c\JKH-
* @author treeroot 1v y*{D
* @since 2006-2-2 \<bx[,?
* @version 1.0 ."g`3tVK
*/ &w\{TZ{
public class SortUtil { ::`HQ@^
public final static int INSERT = 1; Fw_#N6Q
public final static int BUBBLE = 2; <3nMx^
public final static int SELECTION = 3; )Om*@;r(
public final static int SHELL = 4; ~-k9%v`
public final static int QUICK = 5; jVi) Efy
public final static int IMPROVED_QUICK = 6; td$E/h=3
public final static int MERGE = 7; IYv`IS"
public final static int IMPROVED_MERGE = 8; x5pdS:
public final static int HEAP = 9; _T60;ZI+^
'B|JAi?
public static void sort(int[] data) { ?d*z8w
sort(data, IMPROVED_QUICK); @@f"%2ZR[
} GC-5X`Sq
private static String[] name={ .e#w)K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x[p|G5
}; KR}?H#%
9+|$$)
private static Sort[] impl=new Sort[]{ Q3'llOx
new InsertSort(), }PlRx6r@
new BubbleSort(), jRa43ck
new SelectionSort(), #<fRE"v:Q
new ShellSort(), ZtNN<7
new QuickSort(), gt)I(
new ImprovedQuickSort(), g>%o #P7
new MergeSort(), 8]c2r%J
new ImprovedMergeSort(), n9\TO9N
new HeapSort() G/E+L-N#`
}; KYm0@O>;
&C_j\7Dq
public static String toString(int algorithm){ cVv=*81\
return name[algorithm-1]; `bq<$e
} }RF(CwZr(
b!t0w{^w
public static void sort(int[] data, int algorithm) { kdiM5l70
impl[algorithm-1].sort(data); f_OQ./`
} \doUTr R
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public static interface Sort { #\{l"-
public void sort(int[] data); E_rI?t^
} gT.sjd
C[cbbp
public static void swap(int[] data, int i, int j) { >>r(/81S
int temp = data; aqZi:icFa
data = data[j]; WCZjXDiwJ
data[j] = temp; LBeF&sb6
} bIDj[-CDG
} +fB5w?Rg