[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; 0 R6:3fV6R
} ?sN{U\
int i1=l; DDE-$)lf>
int i2=mid+1; %>+uEjbT
for(int cur=l;cur<=r;cur++){ zPt<b!q
if(i1==mid+1) `Ba]i)!
data[cur]=temp[i2++]; #g{R+#fm
else if(i2>r) Yy*=@qu>g
data[cur]=temp[i1++]; VD=H=Ju
else if(temp[i1] data[cur]=temp[i1++]; p-4$)w~6i
else mixsJ}e
data[cur]=temp[i2++]; JP#S/kJ%3
} ,54z9F`
} EU[\D;
Gwd38
} #p}GWS)
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改进后的归并排序: +,e#uuj$p
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package org.rut.util.algorithm.support; +x]/W|5
[.#nM
import org.rut.util.algorithm.SortUtil; [ZWAXl $
'D\X$^J^
/** ,s8/6n#
* @author treeroot +_GS@)L`%
* @since 2006-2-2 3^8Cc(bk
* @version 1.0 4]o+)d.`(
*/ Y'U1=w~E
public class ImprovedMergeSort implements SortUtil.Sort { nCQtn%j't
=%<=Bn
private static final int THRESHOLD = 10; gN/<g8
>|taU8^|G}
/* gd;!1GNi]
* (non-Javadoc) ';C'9k<P:
* 2KLMFI.F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %"WENa/t
*/ )vW'g3u_
public void sort(int[] data) { *Fy6-CC1
int[] temp=new int[data.length]; "Zp&7hI
mergeSort(data,temp,0,data.length-1); z\ZnxZ@
} DY2*B"^
wf8{v
private void mergeSort(int[] data, int[] temp, int l, int r) { 1K Vit{
int i, j, k; VZ9 p "
int mid = (l + r) / 2; VYG@_fd!x
if (l == r) .S//T/3O]Q
return; uu6 JZp
if ((mid - l) >= THRESHOLD) |]7c&`
mergeSort(data, temp, l, mid); #,#`<h!
else \U:OQ.e
insertSort(data, l, mid - l + 1); qo[[P)tq
if ((r - mid) > THRESHOLD) Y`g oV
mergeSort(data, temp, mid + 1, r); P~a@{n*8
else Oiib2Ov
insertSort(data, mid + 1, r - mid); wAHuPQ&_Q
@2E52$zu
for (i = l; i <= mid; i++) { mG[jR*JW
temp = data; m.lR]!Y=w
} 9&sb,^4
for (j = 1; j <= r - mid; j++) { ,p|Q/M^
temp[r - j + 1] = data[j + mid]; 'I,a 29
} }m+Q(2
int a = temp[l]; A4zI1QF
int b = temp[r]; %9cT#9!7
for (i = l, j = r, k = l; k <= r; k++) { MT!Y!*-5
if (a < b) { O>L,G)g
data[k] = temp[i++]; wO]e%BTO
a = temp; 3t-STk?
} else { &~*](Ma
data[k] = temp[j--]; qA>#;UTp
b = temp[j]; {Z2nc)|7C
} CcQc!`YC
} )0/9 L
} /9br&s$B
r^m&<)Ca
/** n.g-%4\q
* @param data Z5t^D|
* @param l ]N 9N][n
* @param i [H*JFKpx
*/ &g;!n&d zP
private void insertSort(int[] data, int start, int len) { .Y6v#VI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S<7!<]F-
} $b`nV4p
} h(=<-p@
} rd7p$e=i
} r;{$x
35l%iaj]G5
堆排序： kt6)F&;$
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package org.rut.util.algorithm.support; ~u&gU1}
LK DfV
import org.rut.util.algorithm.SortUtil; fg LY{
=\lw.59
/** # Wi?I=,
* @author treeroot ~61b^L}$
* @since 2006-2-2 d.?}>jl
* @version 1.0 \-yI dKj
*/ ].s;Yxz
public class HeapSort implements SortUtil.Sort{ >B6*`3v
vv.E6D^x(
/* (non-Javadoc) =mXC,<]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r#OPW7mhE
*/ .e7tq\k
public void sort(int[] data) { SMrfEmdH+
MaxHeap h=new MaxHeap(); R=~%kt_n
h.init(data); y"yo\IDW
for(int i=0;i h.remove(); D% jGK
System.arraycopy(h.queue,1,data,0,data.length); G4'Ia$
} *;@wPT
%T]$kF++&
private static class MaxHeap{ oMN<jAU.
J$}]p
void init(int[] data){ t+a.,$U
this.queue=new int[data.length+1]; ^i|R6oO_5
for(int i=0;i queue[++size]=data; %W~w\mT
fixUp(size); SVo?o|<
} <\O+
} -)(5^OQ
X&WP.n)
private int size=0; Z5Lmg
fHd[8{;P:
private int[] queue; :|n[zjK/S
!'H$08Ql}
public int get() { 2yJ{B
return queue[1]; IW~wO
} Jw _>I
'Ou C[$Z
public void remove() { .=;IdLO,Bf
SortUtil.swap(queue,1,size--); @dv8 F "v
fixDown(1); ?JZ$M
} >eA@s}_8
file://fixdown Wh i#Ii~
private void fixDown(int k) { %[|^7
int j; &:l-;7d
while ((j = k << 1) <= size) { `rVru= zoy
if (j < size %26amp;%26amp; queue[j] j++; d/R!x{$-f
if (queue[k]>queue[j]) file://不用交换 I(^0/]'
break; zjA]Tr
SortUtil.swap(queue,j,k); U${W3Ra
k = j; hnFpC1TO
} {A/^;X{N^
} 8;?4rrS
private void fixUp(int k) { =sk[I0W
while (k > 1) { ~1+6gG
int j = k >> 1; zx%WV@O9
if (queue[j]>queue[k]) V<UChD)N`
break; J'Pyn
SortUtil.swap(queue,j,k); vS\2zwb}
k = j; yD~,+}0)
} $6Q^ur:
} V~/G,3:0y%
VaD+:b4
} _CHzwNU
6C&&="uww
} <kFLwF?PM'
:m<&Ff}
SortUtil： rhc+tR
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package org.rut.util.algorithm; T^7Cv{[
%]Z4b;W[Y
import org.rut.util.algorithm.support.BubbleSort; 6 ]x?2P%
import org.rut.util.algorithm.support.HeapSort; .yy-jf/
import org.rut.util.algorithm.support.ImprovedMergeSort; qA GjR!=^
import org.rut.util.algorithm.support.ImprovedQuickSort; ]P3m=/w
import org.rut.util.algorithm.support.InsertSort; 12lX-~[["
import org.rut.util.algorithm.support.MergeSort; MoFM'a9
import org.rut.util.algorithm.support.QuickSort; (|BY<Ac3
import org.rut.util.algorithm.support.SelectionSort; Ip'tB4Mq
import org.rut.util.algorithm.support.ShellSort; ]i#p2?BR
h&i*=&<HP6
/** yIL=jzm`7
* @author treeroot O=3/qs6m
* @since 2006-2-2 \I!mzo
* @version 1.0 JVuju$k
*/ nmU1xv_
public class SortUtil { lBbb7*Ljt<
public final static int INSERT = 1; E@ :9|5
public final static int BUBBLE = 2; U=bx30brh%
public final static int SELECTION = 3; >SI'Q7k
public final static int SHELL = 4; Z8v8@Y
public final static int QUICK = 5; _P.I+!w:x
public final static int IMPROVED_QUICK = 6; %C_tBNE<
public final static int MERGE = 7; LH4A!a]
public final static int IMPROVED_MERGE = 8; a%r!55.
public final static int HEAP = 9; BI:Cm/ >
~Y x_ 3
public static void sort(int[] data) { _4N.]jr5
sort(data, IMPROVED_QUICK); mU-2s%X<.^
} w5 .^meU
private static String[] name={ G[mqLI{q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Lyhuyb)k5^
}; ?CAU+/
[1vm~w'
private static Sort[] impl=new Sort[]{ c;kU|_
new InsertSort(), m,Y/ke\
new BubbleSort(), ZK]qQrIwy
new SelectionSort(), {J==y;dK
new ShellSort(), Bg]VaTm[=
new QuickSort(), Ow4_0l&
new ImprovedQuickSort(), -LiGO#U
new MergeSort(), 4<-Kd~uL
new ImprovedMergeSort(), eS!]..%y
new HeapSort() 6o^>q&e}%
}; i]c{(gd`
tQ9%rb
public static String toString(int algorithm){ <uuumi-!%G
return name[algorithm-1]; G^Gs/- f
} U"7o;q
X_2N9$},
public static void sort(int[] data, int algorithm) { kD#n/RBgf
impl[algorithm-1].sort(data); dq '2y
} 9}6_B|
mEJ7e#
public static interface Sort { hq7f"`
public void sort(int[] data); G0 EXgq8
} j~N*TXkC
Ve(<s
public static void swap(int[] data, int i, int j) { dCoP qKy
int temp = data; Gt&yz"?D
data = data[j]; sLA.bp.O
data[j] = temp; i?/Q7D<P
} +S{m!j%B
} zls^JTE