[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; -JyODW#j
} n4r( Vg1GS
int i1=l; i_ODgc`H
int i2=mid+1; ~RR_[t2Z
for(int cur=l;cur<=r;cur++){ z7l;|T
if(i1==mid+1) `aWwF} +Y
data[cur]=temp[i2++]; 2h? r![
else if(i2>r) ^kR^ QL$
data[cur]=temp[i1++]; {'wU&!
else if(temp[i1] data[cur]=temp[i1++]; 1^H<+0
else ^)0{42!]
data[cur]=temp[i2++]; d8BK/b
} KJvJUq
} 6'sFmC
x_H7=\pX]
} PEQvEruZ}
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改进后的归并排序: n5,Pq+[
&<#BsFz
package org.rut.util.algorithm.support; 3xCA\*
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import org.rut.util.algorithm.SortUtil; CyBM4qyH
23n8,} H,
/** WCfe!P?g
* @author treeroot 9:Z~}yX
* @since 2006-2-2 szsZFyW)+
* @version 1.0 ,LPFb6o
*/ zH\;pmWiN9
public class ImprovedMergeSort implements SortUtil.Sort { j n&9<"W
r;6YCI=z
private static final int THRESHOLD = 10; 0R^(rE"2#
VV}fW"_ND
/* {ZIFj.2
* (non-Javadoc) Mp@(/
* w-Q 6 -
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3<'Q`H>
*/ 3L!&~'.Ro
public void sort(int[] data) { nTtt$I@hW
int[] temp=new int[data.length]; yNMwd.r[
mergeSort(data,temp,0,data.length-1); vheAh`u^&
} OFAqP1o{$
{R8P $
private void mergeSort(int[] data, int[] temp, int l, int r) { 0@/E%T1c"
int i, j, k; m&z%kVsg]
int mid = (l + r) / 2; 7;s0m0<%~
if (l == r) :)V0zHo&(
return; hG3$ ]i9
if ((mid - l) >= THRESHOLD) ~i&< !O&
mergeSort(data, temp, l, mid); ToXFMkwY
else y2% ^teXk
insertSort(data, l, mid - l + 1); F-\8f(\
if ((r - mid) > THRESHOLD) tlxjs]{0E
mergeSort(data, temp, mid + 1, r); kd4*Zab
else +n~rM'^4/
insertSort(data, mid + 1, r - mid); 9M~$W-5
Pg8=
for (i = l; i <= mid; i++) { 8}`8lOE7
temp = data; .Fz6+m;Z
} *M!YQ<7G^d
for (j = 1; j <= r - mid; j++) { |/Q."d
temp[r - j + 1] = data[j + mid]; 3LnyQ
} 9l^
int a = temp[l]; M,U=zNPnk
int b = temp[r]; NeZYchR
for (i = l, j = r, k = l; k <= r; k++) { F4{. 7BT
if (a < b) { 7ofH@U
data[k] = temp[i++]; m3!MHe~t
a = temp; TV>R(D3T/
} else { 8;BwzRtgT
data[k] = temp[j--]; `TR9GWU+B
b = temp[j]; "uERa(i
} w]YyU5rhS
} ej53O/hP
} .0;k|&eBD
0YRYCO$
/** _q4dgi z
* @param data CbaAnm1
* @param l QMpA~x_m
* @param i (eIxU&o'
*/ Y0C<b*!"ST
private void insertSort(int[] data, int start, int len) { N<r0I-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X10TZ
} <1%XN
} ieoUZCO^r\
} ,r,;2,;6nd
} ;j\$[4W.i
~(P\F&A(&
堆排序： >h-6B=
?Lb7~XKt\
package org.rut.util.algorithm.support; Ps5wQaS
YZu#0)
import org.rut.util.algorithm.SortUtil; #Z5Wk
3>3ZfFC
/** KEB>}_[
* @author treeroot /FZ )ej\
* @since 2006-2-2 tD482Sb=
* @version 1.0 U,}T ]J
*/ T $]L 5
public class HeapSort implements SortUtil.Sort{ >a~FSZf
\V\ET
/* (non-Javadoc) TbM*?\7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `.Q3s?1F
*/ }j@@
public void sort(int[] data) { \>k#]4@rp
MaxHeap h=new MaxHeap(); aVL%-Il}
h.init(data); xH-k~#
for(int i=0;i h.remove(); (?wKBUi
System.arraycopy(h.queue,1,data,0,data.length); Mo r-$a8
} #`wfl9tj
R.$Y1=U6
private static class MaxHeap{ ^Iq.0E9_
6j![m+vo%
void init(int[] data){ l),13"?C(
this.queue=new int[data.length+1]; 32'9Ch.
for(int i=0;i queue[++size]=data; %R"nm
fixUp(size); :#KURYO<
} }+Z;zm@/6
} ttt&sW`
&,|uTIs
private int size=0; ".Z+bi2l
=v"{EmT[$
private int[] queue; !t{!.
ozwqK oE
public int get() { r/:'}os;
return queue[1]; 01w/,r
} $l"(tB7d
0tyU%z{RV
public void remove() { Li$k<AM
SortUtil.swap(queue,1,size--); 'v)+S;oB
fixDown(1); gvt4'kp
} 0kEq|k9
file://fixdown skArocs
private void fixDown(int k) { RtEkd_2
int j; l'R`XGT
while ((j = k << 1) <= size) { 88U
if (j < size %26amp;%26amp; queue[j] j++; Qp Vm
if (queue[k]>queue[j]) file://不用交换 Kwau:_B
break; 1 .k}gl0<
SortUtil.swap(queue,j,k); ~kFRy{z
k = j; GoXHVUyp
} Z)~4)71Y:
} I9aber1
private void fixUp(int k) { {(Z1JoSl
while (k > 1) { .l'QCW9
int j = k >> 1; (P_+m#
if (queue[j]>queue[k]) AIo;\35
break; RH'R6
SortUtil.swap(queue,j,k); J#nEGl|a
k = j; SjU6+|l
} m8`A~
} 1 crjRbi
Xb;`WE gC
} 6P$q7G
?!vW&KJZx
} .=D6<4#t
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SortUtil： 1Pc'wfj
?RyvM_(N6
package org.rut.util.algorithm; U:(t9NX b
/iy/2x28>
import org.rut.util.algorithm.support.BubbleSort; Vngi8%YWp
import org.rut.util.algorithm.support.HeapSort; / nRaxzf'
import org.rut.util.algorithm.support.ImprovedMergeSort; '?4[w]0J<
import org.rut.util.algorithm.support.ImprovedQuickSort; O#k+.LU
import org.rut.util.algorithm.support.InsertSort; :oQaN[3>_
import org.rut.util.algorithm.support.MergeSort; o!d0
import org.rut.util.algorithm.support.QuickSort; rkp0ej2-
import org.rut.util.algorithm.support.SelectionSort; o)DKP>IM#
import org.rut.util.algorithm.support.ShellSort; JJa?"82FXZ
%vzpp\t
/** jws(`mIf\
* @author treeroot RUO6Co-
* @since 2006-2-2 IS~oyFS
* @version 1.0 !Zx>)V6.
*/ 7dIDKx
public class SortUtil { YN3uhd[2
public final static int INSERT = 1; SuSZ,>
public final static int BUBBLE = 2; Kxn=iv^Ir
public final static int SELECTION = 3; }qg&2M%\
public final static int SHELL = 4; #{a<{HX
public final static int QUICK = 5; (C|%@61S
public final static int IMPROVED_QUICK = 6; zyE yZc?
public final static int MERGE = 7; 7va%-&.&t
public final static int IMPROVED_MERGE = 8; >@o*v*25
public final static int HEAP = 9; T9 1Iz+j
JKGZ0yn
public static void sort(int[] data) { 9:>vl0
sort(data, IMPROVED_QUICK); yo=d"*E4^
} O jmz/W
private static String[] name={ G})mw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XafyI*pOX
}; E&AR=yqk
5irOK9hK
private static Sort[] impl=new Sort[]{ ah.Kb(d:
new InsertSort(), WJWrLu92\U
new BubbleSort(), NgQl;$
new SelectionSort(), w6tY6bf}
new ShellSort(), }#1{GhsS
new QuickSort(), Q*5d~Yr]R
new ImprovedQuickSort(), |k0VJi
new MergeSort(), V^D#i(5
new ImprovedMergeSort(), g}7B0 yo
new HeapSort() EOiKwhrV
}; 62q-7nV
)/Vr 5b@
public static String toString(int algorithm){ f.{0P-Np
return name[algorithm-1]; ( KrIMZ
} xHmc8G$zu
_nt%&f
public static void sort(int[] data, int algorithm) { cW2:D$Pe
impl[algorithm-1].sort(data); ,$Mw/fA
} :d;5Q\C`
2t'&7>Ys{
public static interface Sort { RL%{VE
public void sort(int[] data); iT5%X
} A@4Cfb@
l d@^$
public static void swap(int[] data, int i, int j) { @NF8?>!
int temp = data; f{J7a1 `_
data = data[j]; "(5}=T@,
data[j] = temp; >;Bhl|r~z
} 0WFZx Ad"
} [g{}0[ew