[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; 6P~aW
} gwSN>oj &
int i1=l; BrJ o!@<
int i2=mid+1; mG831v?
for(int cur=l;cur<=r;cur++){ $s-9|Lbs`
if(i1==mid+1) S~0JoCeo
data[cur]=temp[i2++]; k]?z~p
else if(i2>r) rQ
data[cur]=temp[i1++]; %M{k.FE(
else if(temp[i1] data[cur]=temp[i1++]; Mlv<r=E
else )?w&oIj5
data[cur]=temp[i2++]; g.x=pt
} 2yN%~C?$
} 2wx!Lpr<i_
P</s)"@
} _+twqi
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改进后的归并排序: {~"7vkc+
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package org.rut.util.algorithm.support; E@w[&#
'h-3V8m^e
import org.rut.util.algorithm.SortUtil; lDW!Fg
Ue(r}*
/** vd}*_d
* @author treeroot GS\%mPZ
* @since 2006-2-2 |9>*$Fe"
* @version 1.0 ajn-KG!A
*/ }A{_L6qx
public class ImprovedMergeSort implements SortUtil.Sort { of9q"h
~~PgF"v
private static final int THRESHOLD = 10; M@|w[ydQG
U~aWG\h#X
/* )YuRjBcp,"
* (non-Javadoc) +}Xr1fr{jw
* (/"thv5vT{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bvz62?
*/ T yU&QXb
public void sort(int[] data) { BlXX:aZv
int[] temp=new int[data.length]; /7bw: h;
mergeSort(data,temp,0,data.length-1); NQ?x8h3
} n0_B(997*
h4f~5- Y
private void mergeSort(int[] data, int[] temp, int l, int r) { [ S5bj]D
int i, j, k; `f@{Vcr%i
int mid = (l + r) / 2; %drJ p6n%
if (l == r) ibvJWg
return; {G]?{c)"
if ((mid - l) >= THRESHOLD) Qi_&aU$>lM
mergeSort(data, temp, l, mid); EMLx?JnP
else osl=[pm
insertSort(data, l, mid - l + 1); \}Dpb%^\
if ((r - mid) > THRESHOLD) D%-{q>F!gf
mergeSort(data, temp, mid + 1, r); tqK=\{U
else D9~}5
insertSort(data, mid + 1, r - mid); kLJlS,nh\r
wG+=}1X
for (i = l; i <= mid; i++) { o]A XT8
temp = data; ;Xqn-R
} d7* CwY9"
for (j = 1; j <= r - mid; j++) { Yi 6Nw+$
temp[r - j + 1] = data[j + mid]; Rho5s@N7
} @0$}?2
int a = temp[l]; C` pp
int b = temp[r]; O@s{uZ|A6
for (i = l, j = r, k = l; k <= r; k++) { h1#S+k
if (a < b) { 80Ag
data[k] = temp[i++]; Y)|~:& tZ
a = temp; <yZP|_
} else { UR}kB&t
data[k] = temp[j--]; i^WIr h3a
b = temp[j]; lzEb5mg
} >9=:sSQu
} Qm< gb+
} +@0TMK,P
yO=p3PV d
/** <;%0T xK|U
* @param data E/ijvuO
* @param l x=.tiM{#
* @param i y0<Uu
*/ I:i<>kG
private void insertSort(int[] data, int start, int len) { tRteyNA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NvQ%J+
} ym\(PCa5`
} ryg4hHspl
} [ByQ;s5tY
} z>G;(F2
&'s^nn]
堆排序： 8V-,Xig;`
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package org.rut.util.algorithm.support; ltoqtB\s
r0\?WoF2C
import org.rut.util.algorithm.SortUtil; '<7S^^ax
O}C)~GU
/** ,^ 7 CP
* @author treeroot zie=2
* @since 2006-2-2 <W*xshn
* @version 1.0 g`[`P@
*/ 7S<UFj
public class HeapSort implements SortUtil.Sort{ OEnDsIhq
W5.Va.
/* (non-Javadoc) dAL3.%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! RPb|1Y}+
*/ 9${Xer'
public void sort(int[] data) { \3aTaT?..
MaxHeap h=new MaxHeap(); 7d;pvhnH
h.init(data); 'z5h3J
for(int i=0;i h.remove(); \vCGU>UY
System.arraycopy(h.queue,1,data,0,data.length); \tx%WC
} 0I5&a
v0#*X5C1'
private static class MaxHeap{ ^,TTwLy-t
R-
void init(int[] data){ =1Z;Ma<;
this.queue=new int[data.length+1]; WhFS2Jl0
for(int i=0;i queue[++size]=data; rA1qSG~c
fixUp(size); *P!s{i
} ]CX[7Q+'
} 3?.1nGu
s]H^wrg&
private int size=0; xx }GOY.J
Dx-KMiQ,"(
private int[] queue; .<#ATFmY
!^y y0`k6
public int get() { jQ=~g-y
return queue[1]; +7U
} nX^1$')gp
l?8)6z#Zl
public void remove() { c*;7yh&%
SortUtil.swap(queue,1,size--); %}&(h/= e
fixDown(1); S&(^<gwl
} ^$-Ye]<
file://fixdown r?A|d.Tl
private void fixDown(int k) { C5@V/vA
int j; (K :]7
while ((j = k << 1) <= size) { = 96P7#%
if (j < size %26amp;%26amp; queue[j] j++; !MVj=(
if (queue[k]>queue[j]) file://不用交换 p!zJ;rh)
break; hoQ7).>
SortUtil.swap(queue,j,k); BFVAw
k = j; ?2#(jZ# 2
} 909md|9K3
} zl%>`k!>
private void fixUp(int k) { 6X)@ajGWg~
while (k > 1) { yz\c5
int j = k >> 1; !kL> ,O>/
if (queue[j]>queue[k]) < g|Z}Y
break; 6CCbBA
SortUtil.swap(queue,j,k); ^"i~DC
k = j; wX,F`e3"/
} ;%Hf)F
} ?LaUed'
@Uo6>-WF
} kKiA
L]d-33.c!H
} EQ<RDhC@b
nSx]QREL!
SortUtil： Paj vb-f
r~7:daG*
package org.rut.util.algorithm; M4m$\~zf
zj|WZ=1*Wp
import org.rut.util.algorithm.support.BubbleSort; MYLsHIPC
import org.rut.util.algorithm.support.HeapSort; PRB{VC<k
import org.rut.util.algorithm.support.ImprovedMergeSort; wy,p&g)>
import org.rut.util.algorithm.support.ImprovedQuickSort; )ev<7g9*q
import org.rut.util.algorithm.support.InsertSort; )]43R
import org.rut.util.algorithm.support.MergeSort; #VVr"*7$
import org.rut.util.algorithm.support.QuickSort; -\,zRIOK
import org.rut.util.algorithm.support.SelectionSort; o "z@&G" ^
import org.rut.util.algorithm.support.ShellSort; $`VFdAe
57,dw-|xi
/** a%vrt)Gx
* @author treeroot nFRsc'VT
* @since 2006-2-2 :5fAPK2r<
* @version 1.0 l2jF#<S@
*/ ihCIh6
public class SortUtil { !CUoHTmB
public final static int INSERT = 1; TsQU6NNE
public final static int BUBBLE = 2; XORk!m|
public final static int SELECTION = 3; 51BlM%
public final static int SHELL = 4; H1EDMhn/
public final static int QUICK = 5; "v-(g9(
public final static int IMPROVED_QUICK = 6; !j:`7PT\
public final static int MERGE = 7; ^W?Z
public final static int IMPROVED_MERGE = 8; h8e757z
public final static int HEAP = 9; w5=tlb
\ I`p|&vG
public static void sort(int[] data) { wzCUZ1N9q
sort(data, IMPROVED_QUICK); fbvbz3N
} @Xp~2@I=ls
private static String[] name={ 3AcD,,M>>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eqAW+Ptx
}; q'Wr[A40j
>rsqH+oL
private static Sort[] impl=new Sort[]{ !g!5_|
new InsertSort(), qJ4T]FVN
new BubbleSort(), ,XkGe
new SelectionSort(), 5ETip'<KT6
new ShellSort(), @`36ku
new QuickSort(), 4qi[r)G
new ImprovedQuickSort(), [K/m
new MergeSort(), tWeFEVg
new ImprovedMergeSort(), >slm$~rv
new HeapSort() eYX5(`c[
}; ufV!+$C)is
bi4f]^hQz
public static String toString(int algorithm){ A]0:8@k5
return name[algorithm-1]; *J|(jdu7
} <[:o !$
?:{sH#ua
public static void sort(int[] data, int algorithm) { RDqFL.-S
impl[algorithm-1].sort(data); v"& pQ
} \daZk/@
ikD1N
public static interface Sort { [BBEEI=|r
public void sort(int[] data); ~@ jY[_
} \b=Pj!^gwb
$Xm6N@
public static void swap(int[] data, int i, int j) { q$(5Vd:
int temp = data; bg,9@ }"F
data = data[j]; 5{e,L>H<
data[j] = temp; |*/[`|*G
} 3DgsI7-F
} sZ,Y60s8a