[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; v(OBXa9
} \c[IbL07
int i1=l; Mg#j3W}]
int i2=mid+1; 2MA]jT
for(int cur=l;cur<=r;cur++){ 9w9jpe#
if(i1==mid+1) DF6c|
data[cur]=temp[i2++]; qS&%!
else if(i2>r) r_EcMIuk
data[cur]=temp[i1++]; fw oQ'&
else if(temp[i1] data[cur]=temp[i1++]; 8A{_GH{:
else qyHZ M}/
data[cur]=temp[i2++]; nUq<TJ
} [![%9'+P
} kt4d;4n
fF*`'i=!
} =h(W4scgqX
&R~n>>c
改进后的归并排序: qo)?8kx>l
3D9!M-
package org.rut.util.algorithm.support; Pmi#TW3X
/~4"No@
import org.rut.util.algorithm.SortUtil; (;VVCAoy
`Q+moX
/** kj+#TnF-
* @author treeroot VL[)[~^
* @since 2006-2-2 gPC*b+
* @version 1.0 LJX-AO.4
*/ )} DUMq7
public class ImprovedMergeSort implements SortUtil.Sort { pf4 ^Bk}e
oJKa"H-jL
private static final int THRESHOLD = 10; "m{,~'x
>=iy2~Fz,
/* 4'KOp&#l K
* (non-Javadoc) [P|[vWO
* 1_$xSrwcF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :V)lbn\
*/ C0=9K@FCb
public void sort(int[] data) { y}C`&nW[=
int[] temp=new int[data.length]; J/7R\;q`~o
mergeSort(data,temp,0,data.length-1); #S%Q*k<hw
} y]%w)4PS
m8623DB"
private void mergeSort(int[] data, int[] temp, int l, int r) { QZ `tNq :/
int i, j, k; 3Rm#-T s
int mid = (l + r) / 2; UN"(5a8.
if (l == r) s<x1>Q7X~
return; nS()u}c;r
if ((mid - l) >= THRESHOLD) U $Qv>7
mergeSort(data, temp, l, mid); @v\*AYr'M
else q.Nweu!jQ
insertSort(data, l, mid - l + 1); tU"raP^=
if ((r - mid) > THRESHOLD) 4[ryKPa,
mergeSort(data, temp, mid + 1, r); {%w!@-
else bYe;b><G
insertSort(data, mid + 1, r - mid); Oo?,fw
1GEK:g2B
for (i = l; i <= mid; i++) { R];Oxe
temp = data; elG;jB
} [nxE)D
for (j = 1; j <= r - mid; j++) { X &2oPo
temp[r - j + 1] = data[j + mid]; hP J4Oj1O
} X\p,%hk \
int a = temp[l]; \b}~2oX
int b = temp[r]; wPbkUVO
for (i = l, j = r, k = l; k <= r; k++) { x*oWa,
if (a < b) { &iN--~}!$
data[k] = temp[i++]; 79zJ\B_
a = temp; .@iFa3
} else { \qi|Js*{
data[k] = temp[j--]; ]E3U J!!
b = temp[j]; qDWsvx]
} m?s}QGSka
} # N~,F@t
} w",? Bef
-{h
/** WS& kx~oQ
* @param data TJ?g%
* @param l =Nz0.:
* @param i !gwjN_ZJ^
*/ 3E}EBJLsZ
private void insertSort(int[] data, int start, int len) { Dj\e@?Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n{*e 9Aw
} nZR!*$}A
} V+?]S
} GC8}X;((Y
} y( r1I[W'
r%Rs0)$yj
堆排序： 6VD1cb\lF
ryO$6L
package org.rut.util.algorithm.support; C@o%J.9"#
(_* wt]"'
import org.rut.util.algorithm.SortUtil; A`O<6
+.[\g|G
/** _9:@Vl]Q@
* @author treeroot KsAH]2Q%
* @since 2006-2-2 F=G{)*Ih
* @version 1.0 Kr L>FI
*/ x4Rk<Th"o
public class HeapSort implements SortUtil.Sort{ \(I6_a_{
QGiAW7b5
/* (non-Javadoc) 4^c-D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SEKN|YQV/t
*/ fbZibcQ%k
public void sort(int[] data) { OH<?DcfeL
MaxHeap h=new MaxHeap(); x}fn'iUnm
h.init(data); OLq 0V3m
for(int i=0;i h.remove(); B68H&h]D#'
System.arraycopy(h.queue,1,data,0,data.length); B1N)9%
} ^[TV;9I*
!- C'}
private static class MaxHeap{ >=ot8%.!,B
2k7bK6=nm
void init(int[] data){ ~7quTp)
this.queue=new int[data.length+1]; Vu0KtG9
for(int i=0;i queue[++size]=data; B~r}c4R{7
fixUp(size); ]^"k8v/
} ]pTvMom$6
} #i QX6WF
@-.? B
private int size=0; Z\X'd_1!
qZ2&Xw.{1
private int[] queue; ScnY3&rc
toa-Wa{
public int get() { pLoy
return queue[1]; 2x$x; \*j
} g;F"7 ^sg
}4jC_ZAupt
public void remove() { ty1fcdFZM
SortUtil.swap(queue,1,size--); D>ai.T%n
fixDown(1); T!q_/[i~7
} o|S)C<w
file://fixdown <MD;@_Nz\
private void fixDown(int k) { ru.5fQU
int j; 74vmt<Q
while ((j = k << 1) <= size) { t\U$8l_;
if (j < size %26amp;%26amp; queue[j] j++; 2iXoj&3e
if (queue[k]>queue[j]) file://不用交换 v<rF'D2
break; L0Vgo<A
SortUtil.swap(queue,j,k); W|Ldu;#
k = j; Iur9I>8h
} $&-5;4R'0
} (;o*eFC F
private void fixUp(int k) { irxz l3
while (k > 1) { |:iEfi]j
int j = k >> 1; ~P1_BD(
if (queue[j]>queue[k]) Unl?fXI
break; ='Oj4T
SortUtil.swap(queue,j,k); G^h_YjR`*
k = j; /MMtTB H
} i3V/`)iz
} o 5Zyh26
^^LjI
} vd~U@-C=R
:=g.o;(/N
} vgPUIxB@
D(Ix!G/
SortUtil： !c8L[/L
/J%do]PDl
package org.rut.util.algorithm; 2YQ#-M
&{^eU5
import org.rut.util.algorithm.support.BubbleSort; XDmbm*~i
import org.rut.util.algorithm.support.HeapSort; P[gO85
import org.rut.util.algorithm.support.ImprovedMergeSort; v+q<BYq
import org.rut.util.algorithm.support.ImprovedQuickSort; hYt7kq!"
import org.rut.util.algorithm.support.InsertSort; >S&U.
import org.rut.util.algorithm.support.MergeSort; wz#[:2
import org.rut.util.algorithm.support.QuickSort; TL-i=\{L:d
import org.rut.util.algorithm.support.SelectionSort; eqzTQen8q
import org.rut.util.algorithm.support.ShellSort; =t+('
_x\m|SF_g
/** qb7^VIo%c
* @author treeroot }5S2p@W)
* @since 2006-2-2 Dt}dp_
* @version 1.0 F?*k}]Gi
*/ ?vbDB4
public class SortUtil { rZC3\,W
public final static int INSERT = 1; !'c|N9
public final static int BUBBLE = 2; d.}}s$Q
public final static int SELECTION = 3; jn=ug42d
public final static int SHELL = 4; Lt<oi8'N
public final static int QUICK = 5; -{x(`9H;
public final static int IMPROVED_QUICK = 6; |'w^n
public final static int MERGE = 7; b~wKF0vq
public final static int IMPROVED_MERGE = 8; 'C]jwxy
public final static int HEAP = 9; ?MZ:_'2p
"\T"VS^pd
public static void sort(int[] data) { `7B14:\A
sort(data, IMPROVED_QUICK); fEiJ~&{&
} 70`M,``
private static String[] name={ +{>.Sk'$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _"f<Ol[!
}; <q6`~F~|
0/A-#'>
private static Sort[] impl=new Sort[]{ 2ij/N%l
new InsertSort(), U>3 >Ex
new BubbleSort(), .ev\M0Dt
new SelectionSort(), 1M+Zkak7p
new ShellSort(), Ru7L>(Njs
new QuickSort(), 8&Wx@QI
new ImprovedQuickSort(), 6Kht:WE
new MergeSort(), Vu|dV\N0*
new ImprovedMergeSort(), cyc>_$/;1
new HeapSort() sFx$>:$
}; %Rn:GK
wO.B~`y
public static String toString(int algorithm){ u[[/w&UV.,
return name[algorithm-1]; (-2R{!A
} }:^XX0:FK
KZ\dB;W<|
public static void sort(int[] data, int algorithm) { 6aSM*S)
impl[algorithm-1].sort(data); _h~p:=
} c%yh(g
fv|%Ocm
public static interface Sort { o[{&!t
public void sort(int[] data); }~GV'7d1
} Q0SW;o7
a@k.$
public static void swap(int[] data, int i, int j) { 0# UAjT3
int temp = data; P%jkKE?B4
data = data[j]; [Yoa"K
data[j] = temp; Ltg-w\?]
} x 8M#t(hw
} `vH&K{