[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; D=)f )-u'
} da$BUAqU
int i1=l; 8%~t
int i2=mid+1; +tN&a
for(int cur=l;cur<=r;cur++){ S2VVv$r_6
if(i1==mid+1) Q^Bt1C
data[cur]=temp[i2++]; '~wpP=<yyF
else if(i2>r) :Ld!mRZF
data[cur]=temp[i1++]; H_IGFZCh
else if(temp[i1] data[cur]=temp[i1++]; )hj|{h7
else GW2')}g
data[cur]=temp[i2++]; BXUF^Hj%
} mEuHl>
} s2v(=
wn11\j&
} [W,-1.$!dM
n|4;Hn1V
改进后的归并排序: hD<f3_k
:<~7y.*O{
package org.rut.util.algorithm.support; ~mN%(w!^
G;oFTP>o
import org.rut.util.algorithm.SortUtil; ]PNowS\
qsg>5E
/** fj'jNE
* @author treeroot NgB 7?]vu
* @since 2006-2-2 YTU.$t;Ez
* @version 1.0 ;S/7 h6
*/ &}`K^5K|O:
public class ImprovedMergeSort implements SortUtil.Sort { aP>37s
\`xkp[C
private static final int THRESHOLD = 10; *,\` o~
XvSIWs
/* }+Vv0jX|V
* (non-Javadoc) 8Vt4HD08
* qSO*$1i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *N/hc
*/ ad`_>lA4Lp
public void sort(int[] data) { Z#Lx_*p]Q
int[] temp=new int[data.length]; hQgN9S5P
mergeSort(data,temp,0,data.length-1); S9Yt1qb
} 3#<*k>1G?
2go>
private void mergeSort(int[] data, int[] temp, int l, int r) { 1=Ilej1
int i, j, k; f8:$G.}i
int mid = (l + r) / 2; p`+VrcCBOd
if (l == r) uiBTnG"
return; I*1S/o_xI
if ((mid - l) >= THRESHOLD) Eo{EKI1
mergeSort(data, temp, l, mid); o+g4p:Mf
else wy4q[$.4v
insertSort(data, l, mid - l + 1); zb2K;%Qs+f
if ((r - mid) > THRESHOLD) '0+$ m=
mergeSort(data, temp, mid + 1, r); \-. Tg!Q6
else J^I7BsZ
insertSort(data, mid + 1, r - mid); -rDz~M+
|tG+iF@4
for (i = l; i <= mid; i++) { T0FZ7
temp = data; 9[|4[3K
} (buw^ ,NwZ
for (j = 1; j <= r - mid; j++) { @%@zH%b
temp[r - j + 1] = data[j + mid]; FUaNiAr[
} _JOP[KHb
int a = temp[l]; )45_]tk>
int b = temp[r]; 4-:7.I(hq
for (i = l, j = r, k = l; k <= r; k++) { t^@T`2jL
if (a < b) { c#q"\"
data[k] = temp[i++]; 6d{j0?mM
a = temp; ?TuI:dC
} else { "]]q} O?
data[k] = temp[j--]; DcFCKji
b = temp[j]; R^Bk]
} } 21j
} .u< U:*
} LC'2q*:'
( D}"&2
/** U4_"aT>My
* @param data gGKKs&n7
* @param l :z~!p~
* @param i w4:<fnOM
*/ \X@IkL$r
private void insertSort(int[] data, int start, int len) { NdQ%:OKC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v>WB FvyD
} YIDg'a+z
} cjg=nTsBA
} 4 10:%WGc
} ULvVD6RQ47
#O</\|aH)i
堆排序： !s-/0ugZ
w<d*#$[,*
package org.rut.util.algorithm.support; &`PbO
j+1KNH
import org.rut.util.algorithm.SortUtil; >}F?<JB
L<@&nx
/** $'$>UFR
* @author treeroot R|t;p!T
* @since 2006-2-2 Bz]J=g7
* @version 1.0 $GF&x>]]
*/ HIPL!ss]
public class HeapSort implements SortUtil.Sort{ kGD|c=K}
MYTS3(
/* (non-Javadoc) `D)S-7BR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +(AwSh!
*/ @9_)On9hZ
public void sort(int[] data) { ]7F)bIG[
MaxHeap h=new MaxHeap(); Z1]"[U[;
h.init(data); q)Je.6$#X
for(int i=0;i h.remove(); WOH9%xv
System.arraycopy(h.queue,1,data,0,data.length); l%bq2,-%
} fNEz
|E|T%i^}./
private static class MaxHeap{ qP`?M\!O
/\~W$.c
void init(int[] data){ M,L@k
this.queue=new int[data.length+1]; 3*\8p6G
for(int i=0;i queue[++size]=data; dP3VJ3+ %
fixUp(size); t~~r-V":
} kGj]i@(PA4
} 8OBF^r44R
g*r/u;
private int size=0; STp!8mL
5V rcR=?O
private int[] queue; W^ClHQ"Iy
`1_FQnm)
public int get() { *(VbPp_H_
return queue[1]; D'?]yyrf
} \I xzdFF#
Wy,"cT
public void remove() { ct.Bg)E
SortUtil.swap(queue,1,size--); Hf.xd.Yw
fixDown(1); [EOMCH2Ki
} G,/Gq+WX
file://fixdown eu=|t&FKk
private void fixDown(int k) { q"p#H8
int j; !pV<n
while ((j = k << 1) <= size) { 1G_xP^H!
if (j < size %26amp;%26amp; queue[j] j++; a}GAB@YI
if (queue[k]>queue[j]) file://不用交换 C[W5d~@;E
break; YRu%j4Tx
SortUtil.swap(queue,j,k); ^~*8 @v""
k = j; H>Sf[8w)%
} 6DO0zNTY
} Z#LUez;&t#
private void fixUp(int k) { I`#EhH
while (k > 1) { p1uN]T7>
int j = k >> 1; =jBL'|k5
if (queue[j]>queue[k]) ~W/}:;
break; Bx%=EN5.
SortUtil.swap(queue,j,k); eAU"fu6d
k = j; ev*c4^z:s
} ,FS?"Ni
} =G[H,;W
[5-!d!a|st
} ,^M]yr*~
Q{`@ G"'
} ]uJM6QuQ
sV&`0N
SortUtil： &8juS,b
78^Y;2 P]W
package org.rut.util.algorithm; l4DeX\ly7f
w8U2y/:>
import org.rut.util.algorithm.support.BubbleSort; <xC:Ant
import org.rut.util.algorithm.support.HeapSort; O<Jwaap
import org.rut.util.algorithm.support.ImprovedMergeSort; 4g S[D
import org.rut.util.algorithm.support.ImprovedQuickSort; 7!mJhgGc
import org.rut.util.algorithm.support.InsertSort; 9c:5t'Qt5.
import org.rut.util.algorithm.support.MergeSort; I S.F
import org.rut.util.algorithm.support.QuickSort; 4'_L W?DS
import org.rut.util.algorithm.support.SelectionSort; s"#CkG
import org.rut.util.algorithm.support.ShellSort; -aA<.+
my=*zziN
/** ?!_u,sT
* @author treeroot YlG;A\]k
* @since 2006-2-2 E#8J+7
* @version 1.0 $To4dJb
*/ [6oq##
public class SortUtil { y}CkzD
public final static int INSERT = 1; ;;D% l^m+
public final static int BUBBLE = 2; |c]> Q
public final static int SELECTION = 3; 2c!h2$w
public final static int SHELL = 4; f*UBigk
public final static int QUICK = 5; S_`W@cp[
public final static int IMPROVED_QUICK = 6; 'o7R/`4KR
public final static int MERGE = 7; !Jh*a *I}
public final static int IMPROVED_MERGE = 8; BllDWKb
public final static int HEAP = 9; <r@bNx@T
R A*(|n>
public static void sort(int[] data) { NEZH<#
sort(data, IMPROVED_QUICK); I4A;
} !2/l9SUi
private static String[] name={ D[+|^,^>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |>M-+@gj
}; ;CLR{t(N#V
ngtuYASc
private static Sort[] impl=new Sort[]{ t- !h X/
new InsertSort(), p<<6}3~
new BubbleSort(), iJ5e1R8tN
new SelectionSort(), UeFtzty,a
new ShellSort(), +k#mvPq
new QuickSort(), Y=PzN3
new ImprovedQuickSort(), IJ+O),'
new MergeSort(), _a?wf!4>P
new ImprovedMergeSort(), Q1]V|S;)X
new HeapSort() &;'w8_K"^
}; W,0KBkkp
8/Lu'rI
public static String toString(int algorithm){ ajf_)G5X P
return name[algorithm-1]; Vj?*=UL
} hnH)Jy;>
Ky=(urAd
public static void sort(int[] data, int algorithm) { pb,{$A
impl[algorithm-1].sort(data); 4Sd+"3M
} 1Kp?bwh"u
o}5'v^"6,
public static interface Sort { TG""eC!E
public void sort(int[] data); >\N$>"~a
} d@_'P`%-
h#$_<U
public static void swap(int[] data, int i, int j) { M80}3mgP~
int temp = data; _Y}^%eFw
data = data[j]; ?z*W8b]'
data[j] = temp; j 8~Gv=(h
} }])GQ@
} O~7p^i}