[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; Bw8&Amxx:
} '(&,i/O
int i1=l; OE_>Kw7q
int i2=mid+1; }q<%![%
for(int cur=l;cur<=r;cur++){ Y|y X]\,
if(i1==mid+1) V;>u()
data[cur]=temp[i2++]; E@D}Sqt
else if(i2>r) M,/{53
data[cur]=temp[i1++]; q?2kD"%$
else if(temp[i1] data[cur]=temp[i1++]; @Yy']!Ju
else [" nDw<U
data[cur]=temp[i2++]; ?R\:6x<
} dT4e[4l
} Sp^jC Xu
iTg7@%
} }5a$Ka-
u|uPvbM
改进后的归并排序: (H-Y-Lk+
>2@ a\
package org.rut.util.algorithm.support; KvfZj
/%5X:*:H
import org.rut.util.algorithm.SortUtil; $][$ e
QP0[
/** n 2m!a0;
* @author treeroot +Rb0:r>kU
* @since 2006-2-2 aIW W[xZ
* @version 1.0 v#o<. Ig
*/ $H2HVJ
public class ImprovedMergeSort implements SortUtil.Sort { fY{&W@#g
'k9dN \ev
private static final int THRESHOLD = 10; OX*5 yT{
M}*#{UV2
/* Ss c3uo0
* (non-Javadoc) 2$%E:J+2:$
* @N,I}_9-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \`$RY')9|!
*/ 2*9rhOK*
public void sort(int[] data) { yHt `kb2
int[] temp=new int[data.length]; ECF \/12
mergeSort(data,temp,0,data.length-1); s u)AIvF{
} }ikJa
|"XxM(Dm
private void mergeSort(int[] data, int[] temp, int l, int r) { E2a00i/9Y
int i, j, k; r%^J3
int mid = (l + r) / 2; @[(<oX%
if (l == r) "f-z3kL
return; 2h^9lrQcQG
if ((mid - l) >= THRESHOLD) I]OVzM
mergeSort(data, temp, l, mid); E]26a,^L
else b+qdl`Vd
insertSort(data, l, mid - l + 1); A-XWG9nL
if ((r - mid) > THRESHOLD) t:<dirw,o
mergeSort(data, temp, mid + 1, r); f*Dy>sw
else |)\{Rufb
insertSort(data, mid + 1, r - mid); 4_B1qN
BO3%p
for (i = l; i <= mid; i++) { KW5u.phv
temp = data; L4C_qb k;:
} :w5p#+/,P
for (j = 1; j <= r - mid; j++) { Rr0@F`"R
temp[r - j + 1] = data[j + mid]; r:*0)UZlD
} }xE}I<M
int a = temp[l]; =9@t6
int b = temp[r]; 7)y9%-}
for (i = l, j = r, k = l; k <= r; k++) { (hv>vfY@
if (a < b) { 5gnmRd
data[k] = temp[i++]; ;zc,vs
a = temp; ON~K(O2g(
} else { l{b*YUsz>
data[k] = temp[j--]; BvA09lK
b = temp[j]; DHnu F@M
} 3vK,vu q
} c5e wG
} ;[>g(W+
J&bhR9sF
/** rBY{&JhS
* @param data I||4.YT
* @param l j(SBpM
* @param i uqMe%
*/ hR1n@/nh
private void insertSort(int[] data, int start, int len) { @<W^/D1#L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /K2=GLl;
} !<P|:Oo*Dl
} E6FT*}Q
} mtQlm5l
} ejuw+@ _
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堆排序： %]15=7#'y
5/>W(,5}
package org.rut.util.algorithm.support; [V-OYjPAx
{zf)im[.
import org.rut.util.algorithm.SortUtil; t/4&=]n\u
")cJA f
/** #mDeA>b
* @author treeroot &/7D4!N]
* @since 2006-2-2 7^|,l
* @version 1.0 ~&?{hd.
*/ (,5,}
public class HeapSort implements SortUtil.Sort{ QIg.r\>o
;}BDEBl
/* (non-Javadoc) NLLLt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O5:2B\B
*/ 2UF ,W]
public void sort(int[] data) { }j. [h;C6
MaxHeap h=new MaxHeap(); 6HyndB^
h.init(data); ">pt,QV
for(int i=0;i h.remove(); wC~ra:/?:7
System.arraycopy(h.queue,1,data,0,data.length); 4tb y N
} q0l=S+0
aN/0'V|&ym
private static class MaxHeap{ }wh sZ
J"&jR7-9
void init(int[] data){ WLe9m02r
this.queue=new int[data.length+1]; 7Ib/Cm0d|
for(int i=0;i queue[++size]=data; }}g.L|
fixUp(size); V>YZ^>oeH
} \~#$$Q-qtU
} ;HOOo>%_K
%di]1vQ
private int size=0; zL<<`u?
[4_JK
private int[] queue; ;F;"Uw
)O~V3a
public int get() { nbGB84
return queue[1]; GkT:7`|C
} ~fDMzOd
N4wv'OrL]
public void remove() { <e s>FD
SortUtil.swap(queue,1,size--); 0xe!tA
fixDown(1); bJz}\[z
} d\R]>
file://fixdown [9:'v@Ph
private void fixDown(int k) { D_HE!fl
int j; R6N+c\W
while ((j = k << 1) <= size) { Y}/e"mp
if (j < size %26amp;%26amp; queue[j] j++; NX?IM8\t
if (queue[k]>queue[j]) file://不用交换 b"t<B2N
break; kYVn4Wq
SortUtil.swap(queue,j,k); c~1X/,biA
k = j; z/,qQVv=}4
} pnvHh0ck_
} y$]gmg
private void fixUp(int k) { A@W/
while (k > 1) { WP@IV;i
int j = k >> 1; BDeX5/`U#
if (queue[j]>queue[k]) !&3iZQGWv
break; B4<W%lm
SortUtil.swap(queue,j,k); /%#LA
k = j; =`b/ip5
} eu]t.Co[X
} Ls<.&3X2
8+L,a_q-
} $ON4nx
[F^qa/vJ10
} :`9hgd/9
[BH^SvE
SortUtil： 2f%G`4/p
UogkQ& B
package org.rut.util.algorithm; jL|y4
g=*`6@_=
import org.rut.util.algorithm.support.BubbleSort; N34.Bt
import org.rut.util.algorithm.support.HeapSort; #SHmAB
import org.rut.util.algorithm.support.ImprovedMergeSort; Xm|Uz`A;
import org.rut.util.algorithm.support.ImprovedQuickSort; f1a >C
import org.rut.util.algorithm.support.InsertSort; _86#$|kw
import org.rut.util.algorithm.support.MergeSort; QEh_2
import org.rut.util.algorithm.support.QuickSort; Y4\BHFq
import org.rut.util.algorithm.support.SelectionSort; acSm+t
import org.rut.util.algorithm.support.ShellSort; _?vh#6F
"!9hcv-;
/** Gj~1eS
* @author treeroot t3#My2=
* @since 2006-2-2 \k#|[d5W
* @version 1.0 "k8Yc<`u
*/ kHO2&"6
public class SortUtil { wIrjWU2
public final static int INSERT = 1; qfO=_z ES
public final static int BUBBLE = 2; o)X(;o
public final static int SELECTION = 3; X>[x7t:
public final static int SHELL = 4; ^V DJGBk
public final static int QUICK = 5; D# $Fj
public final static int IMPROVED_QUICK = 6; d6$,iw@>^
public final static int MERGE = 7; ?e`4 sf_~
public final static int IMPROVED_MERGE = 8; %:v59:i}
public final static int HEAP = 9; }Htnhom0n
0{ZYYB&"~J
public static void sort(int[] data) { 'IorjR@40
sort(data, IMPROVED_QUICK); A`=;yD
} v^Eg ,&(
private static String[] name={ jRswGMx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *V\z]Dy-[
}; /Hox]r]'e
iqzl(9o.D
private static Sort[] impl=new Sort[]{ D 8nt%vy
new InsertSort(), -_m>C2$6x
new BubbleSort(), IL:d`Kbqf
new SelectionSort(), DFgr,~
new ShellSort(), 7x/S4Gs'4
new QuickSort(), nkKiYr
new ImprovedQuickSort(), bv.DW,l%'
new MergeSort(), j\^0BTZ
new ImprovedMergeSort(), KGMX >t'
new HeapSort() wq|~[+y
}; /5:f[-\s
/`M>3q[
public static String toString(int algorithm){ T;cyU9
return name[algorithm-1]; Wq bfZx
} g/)$-Z)Nu
}PZz(Ms
public static void sort(int[] data, int algorithm) { !Gv*iWg
impl[algorithm-1].sort(data); _(CuuP$`I
} %X)i-^T
\5+?wpH
public static interface Sort { k,EI+lCX
public void sort(int[] data); {U$qxC]M
} g$&uD
rAc Yt9M#
public static void swap(int[] data, int i, int j) { Z_Gb9
int temp = data; MA:2]l3e
data = data[j]; )$V&Nf
data[j] = temp; kmJ{(y)w
} -ff|Xxar{
} h[5<S&