[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; urD{'FQf
} fhki!# E8M
int i1=l; ge{%B~x
int i2=mid+1; |5BvVqn
for(int cur=l;cur<=r;cur++){ J@q!N;eh|
if(i1==mid+1) $|19]3T@Z
data[cur]=temp[i2++]; ;l@Ge`&u
else if(i2>r) hi ),PfAV
data[cur]=temp[i1++]; k,/2]{#53d
else if(temp[i1] data[cur]=temp[i1++]; Gfle"_4m8
else *W4~.peoE
data[cur]=temp[i2++]; uHt@;$9A
} =A/$[POr
} "!o|^nN,
mGUG
} rWuqlx#
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改进后的归并排序: 7I:<i$)V
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package org.rut.util.algorithm.support; <'P+2(Oi
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import org.rut.util.algorithm.SortUtil; JZ"XrS0?
tj" EUqKQ
/** pxQh;w
* @author treeroot -$f$z(h
* @since 2006-2-2 e[.JS6
* @version 1.0 ?Aky!43
*/ /|[%~`?BM
public class ImprovedMergeSort implements SortUtil.Sort { EvDg{M}
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private static final int THRESHOLD = 10; wgKM6?
n'<F'1SWv
/* k{+Gv}Y
* (non-Javadoc) ~"U^N:I"
* /h K/t;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;-{'d8
*/ }H9V$~}@-
public void sort(int[] data) { W&9X <c*
int[] temp=new int[data.length]; O['5/:-
mergeSort(data,temp,0,data.length-1); M}!E :bv'
} sKL"JA T
'<hgc
private void mergeSort(int[] data, int[] temp, int l, int r) { kwpbgQ
int i, j, k; 2~W8tv0^b2
int mid = (l + r) / 2; ?lQ-HOAw
if (l == r) oJor ]QYK
return; b:6e2|xf?
if ((mid - l) >= THRESHOLD) )ZDqj
mergeSort(data, temp, l, mid); 1H7bPl|
else 690;\O '
insertSort(data, l, mid - l + 1); d?1[xv;
if ((r - mid) > THRESHOLD) 9 IY1"j0O
mergeSort(data, temp, mid + 1, r); |F52)<\
else C3e0d~C
insertSort(data, mid + 1, r - mid); #w]@yL]|is
r>7Dg~)V
for (i = l; i <= mid; i++) { "P8cgj C
temp = data; ]dQ
} -jL10~/
for (j = 1; j <= r - mid; j++) { PRyzUG&
temp[r - j + 1] = data[j + mid]; xSZ+6R|
} ?H(']3X5@
int a = temp[l]; =sh]H$
int b = temp[r]; ?89_2W
for (i = l, j = r, k = l; k <= r; k++) { :P20g](
if (a < b) { bRK[u\,
data[k] = temp[i++]; 0z=^_Fb
a = temp; '645Fr[lg
} else { LP5@ID2G
data[k] = temp[j--]; Xe:e./@
b = temp[j]; hGlRf_{
} ~mu)Cw
} 7& G#&d
} v L!?4k
f!+G1z}iA
/** ]sV) '-
* @param data CC{{@
* @param l [[VB'Rs
* @param i 6Bn%7ZBv
*/ ">"B
private void insertSort(int[] data, int start, int len) { qgZN&7Nn:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jL9to6 Hmr
} |s*tRag
} ~YCZvJ
} o_&*?k*
} XXZ<r
lc\f6J>HT
堆排序： nM6/c
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package org.rut.util.algorithm.support; )E(9 R(
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import org.rut.util.algorithm.SortUtil; gC\^"m
h(3ko An
/** D;WQNlTU
* @author treeroot \ q=Bbfzv
* @since 2006-2-2 @DA.$zn&
* @version 1.0 =/L;}m)7
*/ $VyH2+ jC
public class HeapSort implements SortUtil.Sort{ V[r1bF
Pvu*Y0_p
/* (non-Javadoc) CWS&f g%o{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -@yu 9=DT
*/ n>:|K0u"
public void sort(int[] data) { I\:(`)"r
MaxHeap h=new MaxHeap(); },(Ln%M
h.init(data); ~xV|<;
for(int i=0;i h.remove(); Ym/y2B(
System.arraycopy(h.queue,1,data,0,data.length); 0X[uXf
} s2Hx?~
6F4OISy%3
private static class MaxHeap{ VLs%;|`5D
;$$.L bb8
void init(int[] data){ 2C_/T8
this.queue=new int[data.length+1]; *Z C$DW!-
for(int i=0;i queue[++size]=data; Hlye:.$
fixUp(size); KJ;NcUq
} !Au9C
} \rY<DxtOq
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private int size=0; 3pk`&'
/5 6sPl 7}
private int[] queue; >pq= .)X}
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public int get() { }E]&,[4&M
return queue[1]; I-?Dil3
} &S|%>C{P.w
yCLDJ%8
public void remove() { ?ta(`+"
SortUtil.swap(queue,1,size--); pz]#/Ry?
fixDown(1); P]b *hC
} .S=^)
file://fixdown ^wm>\o;
private void fixDown(int k) { &]mZp&
int j; p!]$!qHO(
while ((j = k << 1) <= size) { u#uT|a.
if (j < size %26amp;%26amp; queue[j] j++; F1aI4H<(T
if (queue[k]>queue[j]) file://不用交换 8#&axg?a
break; #\X="'/
SortUtil.swap(queue,j,k); Yl!~w:O!o
k = j; +IpC
} xesZ7{ o
} Gcz@z1a=n
private void fixUp(int k) { 4OOH 3O
while (k > 1) { pk,]yi,ZF
int j = k >> 1; ,]UCq?YW)T
if (queue[j]>queue[k]) GIGC,zP@k
break; JTn\NSa
SortUtil.swap(queue,j,k); N 2\lBi
k = j; 8kwe._&)
} Bw;LGEHi|
} /:],bNb
l[D5JnWxt
} )lsR8Hi8
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} a.O pxd
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SortUtil： R<GnPN:c
[^4)3cj7}
package org.rut.util.algorithm; jjLwHJ
h &R1"
import org.rut.util.algorithm.support.BubbleSort; ,|r%tNh<8$
import org.rut.util.algorithm.support.HeapSort; D#I^;Xg0h
import org.rut.util.algorithm.support.ImprovedMergeSort; E0o?rgfdq
import org.rut.util.algorithm.support.ImprovedQuickSort; 9< $n'g
import org.rut.util.algorithm.support.InsertSort; {+V]saYP
import org.rut.util.algorithm.support.MergeSort; eXdE?j
import org.rut.util.algorithm.support.QuickSort; Z+G.v=2q<
import org.rut.util.algorithm.support.SelectionSort; zj9)vr`7
import org.rut.util.algorithm.support.ShellSort; /\0rRT
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/** 6pCQP c*A
* @author treeroot tin5.N)"z
* @since 2006-2-2 ra4$/@3n
* @version 1.0 7\?0d!
*/ IW<nfg
public class SortUtil { {hmC=j
public final static int INSERT = 1; [_pw|BGp
public final static int BUBBLE = 2; MY]<^/Q
public final static int SELECTION = 3; 6?C|pO
public final static int SHELL = 4; 1'G&PX
public final static int QUICK = 5; n8dJ6"L<"
public final static int IMPROVED_QUICK = 6; >ARZ=x[
public final static int MERGE = 7; +KzbaBK
public final static int IMPROVED_MERGE = 8; qP}187Q1
public final static int HEAP = 9; +%%Ef]
}+{? Ms
public static void sort(int[] data) { } qf=5v
sort(data, IMPROVED_QUICK); f=L&>X
} Q*J8`J:#^R
private static String[] name={ ~5Cid)Q}@o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K_" denzT+
}; TOe=6Z5h
/#C}1emK
private static Sort[] impl=new Sort[]{ sBLf(Q,
new InsertSort(), Mt93YD-2+
new BubbleSort(), :~Z-K\
new SelectionSort(), }CCTz0[D"
new ShellSort(), H>qw@JiO!
new QuickSort(), 'Cv>V"X: `
new ImprovedQuickSort(), 8NJxtT~0c~
new MergeSort(), aA|<W g
new ImprovedMergeSort(), .a0]1IkatV
new HeapSort() $k,wA8OZ-
}; 8`{)1.d5[
pp2,d`01[L
public static String toString(int algorithm){ N-9Vx#i
return name[algorithm-1]; Sl!#!FGI
} /YLHg5n8+
R|&Rq(ow"
public static void sort(int[] data, int algorithm) { '[z529HN
impl[algorithm-1].sort(data); Q/[g|"
} ]"2;x
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public static interface Sort { T|%pvTIe
public void sort(int[] data); [@&0@/s*t'
} K|{IX^3)V
? +q(,P@*
public static void swap(int[] data, int i, int j) { BIk0n;Kz<L
int temp = data; R.(fo:ve>
data = data[j]; 0,z3A>C
data[j] = temp; dx&!RK+
} P"%QFt,
} =sYUzYm