[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; `?Wy;5-
} !1+yb.{\
int i1=l; p$r=jF&
int i2=mid+1; m0XdIC]s
for(int cur=l;cur<=r;cur++){ cuenDw=eC
if(i1==mid+1) KW^#DI6tr
data[cur]=temp[i2++]; :by EXe;3
else if(i2>r) @=@7Uu-
data[cur]=temp[i1++]; !`j}%!K!
else if(temp[i1] data[cur]=temp[i1++]; U&DD+4+28:
else N%8O9Dp8;
data[cur]=temp[i2++]; 4`(b(DL]
} fQZ,kl
} yk1.fxik'
(8bo"{zI
} 1A>>#M=A
t[L0kF9en
改进后的归并排序: Yvky=RM
:Iy4B+
package org.rut.util.algorithm.support; 07L >@Gf
2"Oj* ;
import org.rut.util.algorithm.SortUtil; r*e<`Is
NkWU5E!
/** OMaG*fb=
* @author treeroot x'Uv;mGo
* @since 2006-2-2 .Y;ljQ
* @version 1.0 3ya_47D
*/ ZbS*zKEW
public class ImprovedMergeSort implements SortUtil.Sort { `/WX!4eR,
)?@X{AN&
private static final int THRESHOLD = 10; /5@4}m>Z@
@EPO\\C"f
/* P)VysYb?
* (non-Javadoc) %!_okf
* &~ =q1?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8T3j/D<r
*/ 3vs;ZBM
public void sort(int[] data) { tS1(.CRk
int[] temp=new int[data.length]; 'q+CL&D
mergeSort(data,temp,0,data.length-1); 9NX/OctFa'
} |VlQ0{
} v#Tm
private void mergeSort(int[] data, int[] temp, int l, int r) { G5JZpB#o
int i, j, k; {yPJYF_l
int mid = (l + r) / 2; nq9|cS%-
if (l == r) }jF67c->
return; Ni"M.O);t
if ((mid - l) >= THRESHOLD) q|Oz
mergeSort(data, temp, l, mid); X?p.U
else FQc8j:'
insertSort(data, l, mid - l + 1); u ##.t
if ((r - mid) > THRESHOLD) [QC|Kd^#
mergeSort(data, temp, mid + 1, r); vjfV??XSU
else <F~0D0G
insertSort(data, mid + 1, r - mid); ^ +e5 M1U=
~,199K#'
for (i = l; i <= mid; i++) { -kFPmM;
temp = data; !nPwRK>
} EfTuHg$pe
for (j = 1; j <= r - mid; j++) { [N$#&4{Je
temp[r - j + 1] = data[j + mid]; Rd4 z+G
} @"B"*z-d
int a = temp[l]; Re`'dde=
int b = temp[r]; hj~nLgpN
for (i = l, j = r, k = l; k <= r; k++) { I-=H;6w7
if (a < b) { jrOqspv
data[k] = temp[i++]; *)+K+J
a = temp; 8OYw72&
} else { 3B{B6w}t&
data[k] = temp[j--]; V(-=@UW
b = temp[j]; Fo$kD(
} O!Rw? Y
} (5-4`:1ux
} 5Z2tTw'i
O@$wU9D<
/** bV'^0(Zv
* @param data K6C@YY(
* @param l X`REhvT
* @param i @wzzI 7}C
*/ u0Nag=cU
private void insertSort(int[] data, int start, int len) { H<hFA(M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); //[zUn
} ENmfbJ4d~
} v6Vd V.BI
} h x_,>\@
} p5 !B
4P1<Zi+<
堆排序： n"p|tEK
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package org.rut.util.algorithm.support; 38I.1p9
@U~i<kt
import org.rut.util.algorithm.SortUtil; Wr3).m52}P
>= G{.H
/** Zx%ib8|j
* @author treeroot $i:wS= w'
* @since 2006-2-2 2YU-iipdOq
* @version 1.0 d[cqs9=\
*/ )#NT*@j`
public class HeapSort implements SortUtil.Sort{ @Ido6Z7
`^mPq?f
/* (non-Javadoc) BCrX>Pp}r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @raw8w\Zj+
*/ @W{VT7w
public void sort(int[] data) { &}YJ"o[I
MaxHeap h=new MaxHeap(); Py&DnG'H
h.init(data); 'G6M:IXno
for(int i=0;i h.remove(); dtXAEL\q
System.arraycopy(h.queue,1,data,0,data.length); mX4u#$xs:
} +Wr"c
I UMt^z
private static class MaxHeap{ ^rHG#^hA
`|{6U"n
void init(int[] data){ X=sC8Edx
this.queue=new int[data.length+1]; zc}qAy'<
for(int i=0;i queue[++size]=data; \.@fAgv
fixUp(size); ^oL43#Nlo
} `{1&*4!
} PT`];C(he
W.B>"u
private int size=0; 47GL[ofY
{~Q9jg(A
private int[] queue; KGVAP
iyj,0T
public int get() { ?Re6oLm<B
return queue[1]; J ejDF*Q
} ?u*gKI
n$jOk |W
public void remove() { MS_@ Xe
SortUtil.swap(queue,1,size--); mKsTA;
fixDown(1); F5*NK!U
} F"#8`Ps>
file://fixdown W(C\lSE0
private void fixDown(int k) { *%{
int j; {*X8!P7C
while ((j = k << 1) <= size) { T)!$-qdz/
if (j < size %26amp;%26amp; queue[j] j++; $?Et sf#*'
if (queue[k]>queue[j]) file://不用交换 YY&3M
break; 3@d{C^\
SortUtil.swap(queue,j,k); !I7bxDzK$
k = j; +PCsp'D d
} Usa
} eHjna\C
private void fixUp(int k) { 't3@dz_dG
while (k > 1) { W7j-siWJ
int j = k >> 1; -T s8y
if (queue[j]>queue[k]) &~%( RO
break; N33{vx
SortUtil.swap(queue,j,k); iva?3.t
k = j; rO_|_nV[
} r`; "
} 01/?
4yk!T
} 17itC9U
@,Re<%\
} N@oNg}D&:
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SortUtil： ))pp{X2m
mt0ZD}E
package org.rut.util.algorithm; :X?bWxOJ
s+=JT+g
import org.rut.util.algorithm.support.BubbleSort; P,(Tu.EPk
import org.rut.util.algorithm.support.HeapSort; l$i^e|*
import org.rut.util.algorithm.support.ImprovedMergeSort; .7BB*!CP
import org.rut.util.algorithm.support.ImprovedQuickSort; [P,/J$v^~
import org.rut.util.algorithm.support.InsertSort; %LL*V|
import org.rut.util.algorithm.support.MergeSort; ylV.ZoY6
import org.rut.util.algorithm.support.QuickSort; O_f+#K)
import org.rut.util.algorithm.support.SelectionSort; #4?(A[]>H
import org.rut.util.algorithm.support.ShellSort; ndsu}:my
|5ifgSZ
/** f;Iaf#V_
* @author treeroot |o:[*2-
* @since 2006-2-2 .^?^QH3
* @version 1.0 #rE#lHo
*/ DeMF<)#
public class SortUtil { <])w@QOA#
public final static int INSERT = 1; :4{;^|RgU
public final static int BUBBLE = 2; 'G.^g}N1
public final static int SELECTION = 3; + lha=
public final static int SHELL = 4; Bn[5M[
public final static int QUICK = 5; -:5]*zVp+-
public final static int IMPROVED_QUICK = 6; S`!MoIMsD
public final static int MERGE = 7; jq4'=L$4
public final static int IMPROVED_MERGE = 8; 4z~%gt74O]
public final static int HEAP = 9; &HPzm6.3
33R_JM{
public static void sort(int[] data) { /,>@+^1
sort(data, IMPROVED_QUICK); ~-"<)XPe
} >%~E <
private static String[] name={ ?z:Xdx\l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,| \62B`
}; c{iF
$WOiXLyCk
private static Sort[] impl=new Sort[]{ DwQaj"1<%
new InsertSort(), vd4}b>
new BubbleSort(), tRqg')y
new SelectionSort(), J!%cHqR
new ShellSort(), HuX{8nla
new QuickSort(), q{rc[ s?
new ImprovedQuickSort(), $] js0)>
new MergeSort(), \X'{ ee
new ImprovedMergeSort(), a"!D@a
new HeapSort() oNgu-&
}; gFsnL*L0
WsA(8Ck<
public static String toString(int algorithm){ 8a\ Pjk
return name[algorithm-1]; 8:BPXdiK
} n..9F$a
[@Db7]nG
public static void sort(int[] data, int algorithm) { C,+Sv-
impl[algorithm-1].sort(data); 1I#S?RSb
} 7qyv.{+
;K'1dsA
public static interface Sort { bdn{Y
public void sort(int[] data); y=L9E?
} H:~41f[
Q~5!c#r
public static void swap(int[] data, int i, int j) { y6[^I'kz
int temp = data; JsOu *9R
data = data[j]; Eua\N<!aai
data[j] = temp; n3-2;xuNKE
} zuWfR&U|W
} D@Zb|EI%<