[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; wmMn1q0F
} k^KpQ&n
int i1=l; ,9F3~Ryt(
int i2=mid+1; ^G5fs'd
for(int cur=l;cur<=r;cur++){ 2t0VbAO1{
if(i1==mid+1) ] fA5D)/m<
data[cur]=temp[i2++]; -ciwIS9L
else if(i2>r) DP*$@5
data[cur]=temp[i1++]; ]A\qI>,
else if(temp[i1] data[cur]=temp[i1++]; p_zVrlVb
else V%t_,AT
data[cur]=temp[i2++]; 'F*OlZ!BWy
} B"88 .U}$
} iYdg1
:vS/Lzk
} SN7_^F
/r&4< @
改进后的归并排序: Q?>*h xzoP
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package org.rut.util.algorithm.support; 8t7r^[T
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import org.rut.util.algorithm.SortUtil; ,DCUBD u&
vUL@i'0&o
/** {~#01p5
* @author treeroot )Fqtb;W=
* @since 2006-2-2 _ Fk^lDI-
* @version 1.0 F7=\*U
*/ "*c&[ALw
public class ImprovedMergeSort implements SortUtil.Sort { RZ9_*Lq7+
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private static final int THRESHOLD = 10; 9Ns%<FRO@
;_ 1Rk&o!
/* R+U*]5~R
* (non-Javadoc) U(~Nmo'
* *y+K{ fM1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /L]@k`.q@
*/ .345%j
public void sort(int[] data) { KAT"!b
int[] temp=new int[data.length]; =:TQ_>$Nc2
mergeSort(data,temp,0,data.length-1); KZ=5"a
} V.+a}J=Cw
*uxKI:rB:
private void mergeSort(int[] data, int[] temp, int l, int r) { }`2+`w%uZ
int i, j, k; az}zoFl
int mid = (l + r) / 2; R(}!gv}s
if (l == r) ;d}n89DXj
return; %X\Rfn0J"
if ((mid - l) >= THRESHOLD) A-^B?E
mergeSort(data, temp, l, mid); ;?-{Uk
else ZXbq5p_
insertSort(data, l, mid - l + 1); O|9Nl*rXz
if ((r - mid) > THRESHOLD) q}E'x/s2m
mergeSort(data, temp, mid + 1, r); h9nh9a(2
else hA`9[58/
insertSort(data, mid + 1, r - mid); gxVJH'[V5
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for (i = l; i <= mid; i++) { qr*e9Uk^
temp = data; HuxvIg
} 'I[xZu/8yg
for (j = 1; j <= r - mid; j++) { ^R+CkF4l l
temp[r - j + 1] = data[j + mid]; !_dW `
} {=Py|N\\t
int a = temp[l]; pUgas?e&
int b = temp[r]; q#8z%/~k
for (i = l, j = r, k = l; k <= r; k++) { !:_krLB<
if (a < b) { !l9#a{#6l
data[k] = temp[i++]; 6Tq2WZ}<'
a = temp; Pi%-bD/w
} else { V Kc`mE
data[k] = temp[j--]; O=u.J8S2
b = temp[j]; :19s=0
} An BM*5G
} [H2su|rBI`
} 09iD| $~
LG?b]'#
/** \x_$Pu
* @param data V%^d~^m,H
* @param l Kc3/*eu;
* @param i ;~}!P7z
*/ k$,y1hH;f8
private void insertSort(int[] data, int start, int len) { `y1,VY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @d^MaXp_P
} x ;]em9b
} E_xk8X~
} 5YiBPB")
} |A H@W#7j
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堆排序： GlT/JZ9
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package org.rut.util.algorithm.support; a7]Z_Gk
hg `N`O
import org.rut.util.algorithm.SortUtil; ,nw5 M.D_
)VG_Y9;Xk:
/** H .sfM
* @author treeroot hSk
* @since 2006-2-2 S~y.>X3"P
* @version 1.0 z+?48}
*/ i_$?sg#=yk
public class HeapSort implements SortUtil.Sort{ 52*KRq o
.n}k,da@(
/* (non-Javadoc) sgB|2cj;j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l-'\E6grdH
*/ ?&b"/sRS
public void sort(int[] data) { z)*\njYe
MaxHeap h=new MaxHeap(); 1| xKb(_l
h.init(data); OJLyqncw
for(int i=0;i h.remove(); YgkQF0+
System.arraycopy(h.queue,1,data,0,data.length); ksqb& ux6
} fp"GdkO#}i
R1:7]z0B
private static class MaxHeap{ DEenvS`,P
y$?O0S%F
void init(int[] data){ t3.I ` Z
this.queue=new int[data.length+1]; i32S(3se
for(int i=0;i queue[++size]=data; rT{2
fixUp(size); CyJZip
} :-b-)*TC;
} R9Y{kk0M
JaJyH%+$!
private int size=0; &([yI>%
\@j3/!=,n%
private int[] queue; 'G3|PA7v
X'cm0}2
public int get() { ~rbJtz
return queue[1]; }An;)!>(nF
} Olq`mlsK
liH1r1M
public void remove() { p/jAr+XM
SortUtil.swap(queue,1,size--); 9Cw !<
fixDown(1); CSE!Abg
} w"h'rw
file://fixdown StMvz~
private void fixDown(int k) { mp0!S
int j; 5R#:ALwX:
while ((j = k << 1) <= size) { Now2ad&
if (j < size %26amp;%26amp; queue[j] j++; I]N!cEr;@-
if (queue[k]>queue[j]) file://不用交换 '\LU 8VC
break; pR~"p#Y
SortUtil.swap(queue,j,k); 2ZQ|nwb7
k = j; { *Wc`ZBY
} S!~p/bB[+I
} 5{M$m&$1
private void fixUp(int k) { 8t&'Yk
while (k > 1) { l8N5}!N
int j = k >> 1; x>[ gShAV!
if (queue[j]>queue[k]) A@I3:V
break; j!?bE3r~
SortUtil.swap(queue,j,k); W o$UV
k = j; El3Ayd3
} i&,1
} !9=Y(rb
6E:5w9_=c
} r Ww.(l
7, :l\t
} :N:e3$c
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SortUtil： 4yRX{Bl|
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package org.rut.util.algorithm; !Y]%U @4}
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import org.rut.util.algorithm.support.BubbleSort; M0uC0\'#P
import org.rut.util.algorithm.support.HeapSort; ~ouRDO
import org.rut.util.algorithm.support.ImprovedMergeSort; U{-[lpd
import org.rut.util.algorithm.support.ImprovedQuickSort; @-}!o&G0
import org.rut.util.algorithm.support.InsertSort; Z+! 96LR
import org.rut.util.algorithm.support.MergeSort; -<gQ>`(0
import org.rut.util.algorithm.support.QuickSort; x!9bvQT
import org.rut.util.algorithm.support.SelectionSort; ut9R]01:
import org.rut.util.algorithm.support.ShellSort; ZvW&%*k=
O9MBQNwjA
/** VV=6v;u`
* @author treeroot ]hA]o7k
* @since 2006-2-2 LfG$?<}hR
* @version 1.0 Kl+4A}Uo
*/ dY]iAJ
public class SortUtil { K|{&SU_m
public final static int INSERT = 1; q|R$A8)L.
public final static int BUBBLE = 2; 4S,/Z{ J.
public final static int SELECTION = 3; D$bJs O
public final static int SHELL = 4; Z`bo1,6>
public final static int QUICK = 5; SrSm%Dv
public final static int IMPROVED_QUICK = 6; yg@}j
public final static int MERGE = 7; M9sB2Ips<
public final static int IMPROVED_MERGE = 8; K/XUF#^B]
public final static int HEAP = 9; 3x~AaC.j
15`,kJSK
public static void sort(int[] data) { #.~lt8F
sort(data, IMPROVED_QUICK); VufG7%S{
} .[X"+i\
private static String[] name={ 3O'X;s2\d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U7Pn $l2!
}; -*&C "%e
N!=Q]\ZD
private static Sort[] impl=new Sort[]{ 5[>N[}Ck>
new InsertSort(), dZjh@yGP.
new BubbleSort(), ,zrShliU
new SelectionSort(), d0@czNWIC
new ShellSort(), aOo;~u2-=
new QuickSort(), ?VT ]bxb
new ImprovedQuickSort(), Jl^THoEL
new MergeSort(), JB\BP$ap
new ImprovedMergeSort(), rwepe5
new HeapSort() FuZLE%gP
}; gT4H? #UB
=)y=39&;/
public static String toString(int algorithm){ lIL{*q(
return name[algorithm-1]; jp QmKX
} Kkz2N
$^"_Fox]A\
public static void sort(int[] data, int algorithm) { dq$CCOC^F
impl[algorithm-1].sort(data); 'QEQyJ0EB
} ^,;8ra*h
KdTna6nY
public static interface Sort { r$.v"Wh)
public void sort(int[] data); al:c2o
} Q\<^ih51
TANt*r7
public static void swap(int[] data, int i, int j) { AehkEN&H/t
int temp = data; @](\cT64i3
data = data[j]; r<L>~S>yb
data[j] = temp; ='|HUxFi
} HxH=~B1"P
} Z8Il3b*)