[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; kM\O2ay
} <ST#< $%
int i1=l; k&P_ c
int i2=mid+1; GX lFS#`
for(int cur=l;cur<=r;cur++){ fE/8;v!=
if(i1==mid+1) -j_J1P0,
data[cur]=temp[i2++]; :B'}#;8_
else if(i2>r) :{tvAdMl7
data[cur]=temp[i1++]; #YSUPO%F
else if(temp[i1] data[cur]=temp[i1++]; V ;)q?ZHg
else :22IY>p
data[cur]=temp[i2++]; w{"GA~=
} ]-aeoa#
} oa?eK
$V)LGu2(m
} [y T4n.f
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改进后的归并排序: VQvl,'z
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package org.rut.util.algorithm.support; 8D:{05
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import org.rut.util.algorithm.SortUtil; ,&HZvU&
0ZV)Y<DJ
/** [@= [< _r
* @author treeroot r\"O8\
* @since 2006-2-2 <nj[=C4v
* @version 1.0 v=|BqG`
*/ k852M^JP
public class ImprovedMergeSort implements SortUtil.Sort { soZw""|v
QWf)5S
private static final int THRESHOLD = 10; Rh%/xG#k
t?]6>J_V
/* %Ys>PzM
* (non-Javadoc) #?i#q%q
* 0n,5"B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [j0I}+@4H
*/ BifA&o%
public void sort(int[] data) { oA~m*|
int[] temp=new int[data.length]; %1]2+_6
mergeSort(data,temp,0,data.length-1); <5(8LMF
} .>?["e#,
43-%")bH
private void mergeSort(int[] data, int[] temp, int l, int r) { ~]/X,Cf
int i, j, k; Hk\+;'PrN
int mid = (l + r) / 2; #~.i\|VL
if (l == r) H+3I[`v
return; 5 ^iU1\(L
if ((mid - l) >= THRESHOLD) B<[;rk
mergeSort(data, temp, l, mid); xM;gF2
else asW1GZO
insertSort(data, l, mid - l + 1); FV$= l %
if ((r - mid) > THRESHOLD) tb0XXEE
mergeSort(data, temp, mid + 1, r); @6$r|:]G-
else $#@4i4TN-
insertSort(data, mid + 1, r - mid); 9MLvHrB;
;?2vW8{p<
for (i = l; i <= mid; i++) { AEnS_Q
temp = data; Oyq<y~}
} ;.W0Aa
for (j = 1; j <= r - mid; j++) { {zUc*9
temp[r - j + 1] = data[j + mid]; "\BP+AF
} Whd4-pR8
int a = temp[l]; }C7tlA8,7
int b = temp[r]; ^l^_K)tw*
for (i = l, j = r, k = l; k <= r; k++) { #s#z@F
if (a < b) { G-3.-
data[k] = temp[i++]; #K!Df%,<
a = temp; L238l
} else { ?GFxJ6!%I
data[k] = temp[j--]; OqBw&zm
b = temp[j]; hDlk! #*
} RC (v#G
} G>mgoN
} [l#WS
@LL&ggV?
/** R[&lk~a{=
* @param data 4!k={Pd
* @param l fe37T@
* @param i EkSTN
*/ Lf0Hz")
private void insertSort(int[] data, int start, int len) { y-n\;d>[(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }aNiO85
} 38q@4U=aiw
} DhZtiqL#_
} -;P<Q`{I
} N^ D/}n
Xb^\{s?b
堆排序： _f3A6ER`
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package org.rut.util.algorithm.support; b=|&0B$E
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import org.rut.util.algorithm.SortUtil; J82{PfQ"
~2H7_+.#
/** Jl]]nOBQ/
* @author treeroot kmc9P&
* @since 2006-2-2 u=E?N:I~F
* @version 1.0 '-i tn
*/ =|U2 }U;
public class HeapSort implements SortUtil.Sort{ 4G>|It
=(n'#mV
/* (non-Javadoc) ImV54h'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gr6ma*)y~t
*/ [BQw$8+n_
public void sort(int[] data) { gs8L/veP
MaxHeap h=new MaxHeap(); Ox~'w0c,f
h.init(data); Tc88U8Gc
for(int i=0;i h.remove(); _).'SU)>
System.arraycopy(h.queue,1,data,0,data.length); W;N/Y3Lb
} Q?a"uei[
3,vH:L4
private static class MaxHeap{ :):Y6)giBD
Xl/G|jB9
void init(int[] data){ L\Jl'r|
this.queue=new int[data.length+1]; Vw{Ys6q
for(int i=0;i queue[++size]=data; %C3cdy_c
fixUp(size); xapkhIW2\
} m|]^f;7z
} D+SpSO7yg
Nr[Rp
private int size=0; \OU+Kl<
YjX=@
private int[] queue; &16bZw
MtYP3:
public int get() { 5pok%g
return queue[1]; *[SsvlFt
} `5 6QX'?
)2FO+_K?T
public void remove() { tH'VV-!MZ
SortUtil.swap(queue,1,size--); vR)7qX}
fixDown(1); 6fV)8,F3
} w//w$}v
file://fixdown Y=rr6/k
private void fixDown(int k) { b}4/4Z.
int j; N/%#GfXx
while ((j = k << 1) <= size) { (t]>=p%4g
if (j < size %26amp;%26amp; queue[j] j++; qXI30Yo#d
if (queue[k]>queue[j]) file://不用交换 *n*y!z
break; r\ %O$zu
SortUtil.swap(queue,j,k); vv0zUvmT
k = j; t3GK{X
} 1}BNG,n
} 4jz]c"p-
private void fixUp(int k) { yQA[X}
while (k > 1) { epbp9[`
int j = k >> 1; O5{XT]:
if (queue[j]>queue[k]) u.[JYZ
break; V1:3
SortUtil.swap(queue,j,k); ]T51;j'48
k = j; <kSaSW
} h]Oplp4\W
} w3w*"M
gr?pvf!I
} "B}08C,?
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} U]D.z}0
K%}I}8M
SortUtil： }}1/Ede{5
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package org.rut.util.algorithm; ~1'468
U959=e
import org.rut.util.algorithm.support.BubbleSort; ;iORfUjxrq
import org.rut.util.algorithm.support.HeapSort; K D-_~uIF
import org.rut.util.algorithm.support.ImprovedMergeSort; PbPP1G')
import org.rut.util.algorithm.support.ImprovedQuickSort; ]= NYvv>H
import org.rut.util.algorithm.support.InsertSort; :'dc=C
import org.rut.util.algorithm.support.MergeSort; 1QJ$yr
import org.rut.util.algorithm.support.QuickSort; )A0&16<
import org.rut.util.algorithm.support.SelectionSort; 7q:bBS
import org.rut.util.algorithm.support.ShellSort; 0tqR wKL
2A%T!9J3
/** 9-Qtj49
* @author treeroot x!~OK::o8
* @since 2006-2-2 "J5Pwvs-
* @version 1.0 GF!{SO4
*/ GnOo+hB
public class SortUtil { W`'|&7~
public final static int INSERT = 1; V 3]p3
public final static int BUBBLE = 2; WHZng QmY
public final static int SELECTION = 3; ^.CX6%
public final static int SHELL = 4; 'r n;|K
public final static int QUICK = 5; "|'`'W
public final static int IMPROVED_QUICK = 6; w)eQ'6Vu
public final static int MERGE = 7; )t0b$<%
public final static int IMPROVED_MERGE = 8; ptv4v[gQ
public final static int HEAP = 9; y+scJ+<
E E|zY%
public static void sort(int[] data) { ^R7zLHU;
sort(data, IMPROVED_QUICK); H27Oq8
} i 9tJHeSm
private static String[] name={ wDhcHB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'h^DI`
}; otSPi7|k
dO4#BDn"=
private static Sort[] impl=new Sort[]{ (1,#=e+
new InsertSort(), IA`8ie+
new BubbleSort(), c'+r[rSn1
new SelectionSort(), ;]M67ma7C
new ShellSort(), 'D"K`Vw
new QuickSort(), R[9PFMn
new ImprovedQuickSort(), 4D8yb|o
new MergeSort(), OPY/XKyY,
new ImprovedMergeSort(), ]2Fo.n
new HeapSort() FFeRE{,
}; "$IwQ
j'*p
public static String toString(int algorithm){ x\hn;i<
return name[algorithm-1]; !J=;Z9
} WQLL[{mhS
TJ[jZuT:
public static void sort(int[] data, int algorithm) { gZEA;N:H%<
impl[algorithm-1].sort(data); DVoV:pk
} q&$0i
P>T*:!s;
public static interface Sort { A%*DQ1N
public void sort(int[] data); wt.{Fqm
} M}oj!xGB
c^Gwri4
public static void swap(int[] data, int i, int j) { ,q@(L
int temp = data; ms\/=96F
data = data[j]; ar qLp|
data[j] = temp; y[WYH5&DJ
} D ,ZNh1xt
} #8f"}>U9.,