[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; DCzPm/#b
} lJY=*KB(6
int i1=l; <RVtLTd/
int i2=mid+1; }'0Xz9/ l
for(int cur=l;cur<=r;cur++){ }vA nP]!A5
if(i1==mid+1) [qMO7enu#
data[cur]=temp[i2++]; =y]b|"s~2
else if(i2>r) [QN7+#K,
data[cur]=temp[i1++]; 8*~:gZ7:
else if(temp[i1] data[cur]=temp[i1++]; BW-P%:B1!R
else pV|?dQ
data[cur]=temp[i2++]; $M<4Bqr
} WHLKf
} gN'i+mQcu
m7eIhmP
} $D\l%y/C
x,G6`|Hl
改进后的归并排序: :.<TWBoV
eo52X&I
package org.rut.util.algorithm.support; gWH9=%!
0HuRFl
import org.rut.util.algorithm.SortUtil; n:."ZBtY*
$ 14DTjj
/** 3U.qN0]
* @author treeroot "t&k{\$\
* @since 2006-2-2 17]31
* @version 1.0 qFChZ+3>
*/ % j{pz
public class ImprovedMergeSort implements SortUtil.Sort { EI+/%.,
zd4y5/aoS
private static final int THRESHOLD = 10; v!hs~DnUZ
]hVXFHrR
/* LA%al @
* (non-Javadoc) T`{MQ:s
* I>o; %}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |(v=1#i
*/ v4~Xv5|w^F
public void sort(int[] data) { XJ/kB8
int[] temp=new int[data.length]; rw0lXs#K<E
mergeSort(data,temp,0,data.length-1); aDv/kFfn
} i*w-Q=
w}q@VVB%
private void mergeSort(int[] data, int[] temp, int l, int r) { >6834e
int i, j, k; Y]Vc}-a(h
int mid = (l + r) / 2; Zw\V}uXI?
if (l == r) Wc>)/y5$
return; ,[1`'nN@g
if ((mid - l) >= THRESHOLD) IX?%H!i
mergeSort(data, temp, l, mid); <+,0G`
else VCRv(Ek
insertSort(data, l, mid - l + 1); tsVhPo]e0
if ((r - mid) > THRESHOLD) :!!`!*!JH
mergeSort(data, temp, mid + 1, r); >:E-^t%
else Ic!83-
insertSort(data, mid + 1, r - mid); 2]*~1d
'c{]#E1}
for (i = l; i <= mid; i++) { &U)s%D8e;d
temp = data; CHP6H}#|g
} Nb^:_0&H@
for (j = 1; j <= r - mid; j++) { P]{.e UB@c
temp[r - j + 1] = data[j + mid]; -"K:ve(K
} U)]natB
int a = temp[l]; #%tL8/K*
int b = temp[r]; A"VXs1>_^
for (i = l, j = r, k = l; k <= r; k++) { k0Yixa
if (a < b) { `b'J*4|oGo
data[k] = temp[i++]; A1$'[8U~3
a = temp; u$p|hd d
} else { gdY/RDxn:
data[k] = temp[j--]; DC7}Xly(
b = temp[j]; e"mfJY
} K"$ky,tU
} bY$!"b~
} &YKzK)@
me^Gk/`Em
/** q\Kdu5x{
* @param data =8_TOvSJ4p
* @param l vqZM89xY
* @param i <yO9j
*/ *sVxjZvV
private void insertSort(int[] data, int start, int len) { { F8,^+b|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "*\3.`Kd
} XQ;dew+
} LfM(DK
} rqJj!{<B
} 3h4"Rv=,
)!-'SH
堆排序： e91d~
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package org.rut.util.algorithm.support; mLA$F4/K
YKd?)$J
import org.rut.util.algorithm.SortUtil; P32'`!/:
Y @&nW
/** jhM|gV&
* @author treeroot PQ]N>'v-
* @since 2006-2-2 %'O(Y{$Y.
* @version 1.0 B*N8:u
*/ lf#six
public class HeapSort implements SortUtil.Sort{ ]+9:i!s
U5 "v1"Ec
/* (non-Javadoc) !Sh5o'D28
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jzMGRN/67
*/ HbVm O]#$D
public void sort(int[] data) { OXV@LYP@
MaxHeap h=new MaxHeap(); ;0q6 bp(<H
h.init(data); sH: &OaA
for(int i=0;i h.remove(); {v 0(0
System.arraycopy(h.queue,1,data,0,data.length); H`@7o8oj1
} i.4[]f[/h
R~-q!nC
private static class MaxHeap{ =@l5He.]&
J<@]7)|U
void init(int[] data){ CFxs`C^
this.queue=new int[data.length+1]; >i E
for(int i=0;i queue[++size]=data; f|5|n>*
fixUp(size); &>+Z$ZD
} r:-WfDz.
} Z3{Qtysuv3
3i~{x[Jc
private int size=0; r'?&VS-Cj
t$iU|^'uV
private int[] queue; D40VJ3TUc
MWf%Lh;R
public int get() { b1!%xdy_T
return queue[1]; R!CUR~F
} &pl;U\dc*a
UU`qI}Ys8F
public void remove() { ]F!h~>
SortUtil.swap(queue,1,size--); w2GY,,R
fixDown(1); Ta$<#wb
} I9m
file://fixdown q1Mk_(4oJ
private void fixDown(int k) { (qdk &
int j; VZR6oia
while ((j = k << 1) <= size) { :+$_(*Z
if (j < size %26amp;%26amp; queue[j] j++; >=Veu; A
if (queue[k]>queue[j]) file://不用交换 0IuU4h5Fr
break; OYy8u{@U:
SortUtil.swap(queue,j,k); 9,+LNZ'k
k = j; m%puD9
} c7_b^7h1
} :Fl:bRH+
private void fixUp(int k) { (fS4qz:&l
while (k > 1) { _`58G#z
int j = k >> 1; tnntHQ&b
if (queue[j]>queue[k]) 4V5*6O9(u
break; E)bP}:4V
SortUtil.swap(queue,j,k); #D8)rs.9
k = j; )DMbO"7
} z)Gr`SA<
} ><HXd+- sd
_qfdk@@g
} =6:Iv"<
H]\H'r"
} LBR_Q0EP
5E}i<}sq5
SortUtil： 5/<Y,eZ/
0)#I5tEre
package org.rut.util.algorithm; B}.ia_&DLR
^+&}:9Ml
import org.rut.util.algorithm.support.BubbleSort; FMiYZ1^r
import org.rut.util.algorithm.support.HeapSort; wqsnyP/m
import org.rut.util.algorithm.support.ImprovedMergeSort; WJWhx4Hk
import org.rut.util.algorithm.support.ImprovedQuickSort; '|.u*M,b
import org.rut.util.algorithm.support.InsertSort; Zzs pE}
import org.rut.util.algorithm.support.MergeSort; 4"@yGXUb
import org.rut.util.algorithm.support.QuickSort; '_8Vay~
import org.rut.util.algorithm.support.SelectionSort; N !:&$z-
import org.rut.util.algorithm.support.ShellSort; = 8n*%NC
mc$dR, H0
/** Sw~<W%! ?
* @author treeroot h 9/68Gc?6
* @since 2006-2-2 yL1\V7GI{[
* @version 1.0 DpAuI w7|
*/ 5k@k
public class SortUtil { F7df
public final static int INSERT = 1; 3[$VW+YV
public final static int BUBBLE = 2; .KV?;{~q@
public final static int SELECTION = 3; k<y$[xV
public final static int SHELL = 4; ?*g]27f11
public final static int QUICK = 5; 2C>PxA6l
public final static int IMPROVED_QUICK = 6; }v{F9dv
public final static int MERGE = 7; "[G P)nC
public final static int IMPROVED_MERGE = 8; ~ lS3+H
public final static int HEAP = 9; M II]sF
zKZ6Qjd8!
public static void sort(int[] data) { s_|wvOW)'
sort(data, IMPROVED_QUICK); 4YJs4CB
} LQ._?35r
private static String[] name={ );C !:?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" b^ZrevM
}; :&]%E/
yl*S|= 8;k
private static Sort[] impl=new Sort[]{ I]h+24_S
new InsertSort(), 4V=dD<3m
new BubbleSort(), `S2=LJ
new SelectionSort(), |Ia46YS
new ShellSort(), Y,9("'bo
new QuickSort(), G{:L^2>
new ImprovedQuickSort(), h^4oy^9
new MergeSort(), ,Tpds^
new ImprovedMergeSort(), a)xN(xp##
new HeapSort() _-^@Jx[
}; {.sF&(e
($-o"y"x
public static String toString(int algorithm){ h`)r :a7
return name[algorithm-1]; |tmD`ndO
} NWf!c-':
#nnP.t m
public static void sort(int[] data, int algorithm) { @|M10r9E
impl[algorithm-1].sort(data); nt4>9;
} +IU]=qS
$`i&\O2*
public static interface Sort { @$aCUJ/mE
public void sort(int[] data); IV\@GM:ait
} s)>]'ii
}b44^iL$9y
public static void swap(int[] data, int i, int j) { tNtP+v-{
int temp = data; e3[N#ryt
data = data[j]; 'tOo0Zgc
data[j] = temp; 9yQ[*
} b"J(u|Du`
} \Ew2@dF{O