[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; ,/XeG`vk
} s\CZ os&
int i1=l; A$H;2T5N
int i2=mid+1; 5\?\|*WT
for(int cur=l;cur<=r;cur++){ I 19 /
if(i1==mid+1) WPN4mEow
data[cur]=temp[i2++]; D<DSK~
else if(i2>r) 2!7)7wlj0
data[cur]=temp[i1++]; {`Jr$*;
else if(temp[i1] data[cur]=temp[i1++]; O@Ro_sPG(
else sb]{05:
data[cur]=temp[i2++]; n[mVwQ(%
} 'UW(0 PXw
} q$<M2
]I+"";oQGB
} }u>F}mUa
]+!{^h$
改进后的归并排序: MPtn$@
doERBg`Jh
package org.rut.util.algorithm.support; MHm=X8eg
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import org.rut.util.algorithm.SortUtil; @lYm2l^
G>>`j2:y
/** +i@r-OL
* @author treeroot 74h[YyVi
* @since 2006-2-2 us_o{
* @version 1.0 Ji#"PE/Pt
*/ \h#,qTE
public class ImprovedMergeSort implements SortUtil.Sort { XVlZ:kz
}:b6WN;c
private static final int THRESHOLD = 10; (F<VcB
aT]G&bR?
/* n{b(~eL?
* (non-Javadoc) CSA.6uIT
* :nt 7jm,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YV6@SXy
*/ "<e<0::
public void sort(int[] data) { E!,+#%O>
int[] temp=new int[data.length]; @AvDV$F
mergeSort(data,temp,0,data.length-1); ptCFW_UV
} /^F_~.u{
wa#$9p~Q
private void mergeSort(int[] data, int[] temp, int l, int r) { fpDx)lQ
int i, j, k; #]~l]Eq
int mid = (l + r) / 2; gG 9e.++:
if (l == r) %X--`91|u
return; _D{V(c<WD
if ((mid - l) >= THRESHOLD) \BoRYb9h
mergeSort(data, temp, l, mid); w;=fi}<G|e
else A<1:vV
insertSort(data, l, mid - l + 1); [32]wgw+{1
if ((r - mid) > THRESHOLD) e]1&f.K
mergeSort(data, temp, mid + 1, r); z<T(afM{*
else <;O-N=
insertSort(data, mid + 1, r - mid); 9i&(VzY[=
HB>&}z0
for (i = l; i <= mid; i++) { ir72fSe
temp = data; yR`X3.:*]
} M;96Wm
for (j = 1; j <= r - mid; j++) { "&_$%#HUv
temp[r - j + 1] = data[j + mid]; F7FUoew<
} ]YO &_#
int a = temp[l]; NFVr$?P
int b = temp[r]; 61XLL/=P
for (i = l, j = r, k = l; k <= r; k++) { Ve]ufn6
if (a < b) { e(5:XHe
data[k] = temp[i++]; :jJ;&t^^
a = temp; .IO_&^
} else { k2"DFXsv
data[k] = temp[j--]; CJDnHuozc
b = temp[j]; jo7`DDb
} S\,~6]^T
} %gd{u\h^
} jGeil qPC
4(h19-V
/** ?yfw3s
* @param data \),DW)
* @param l CQ4MQ<BJ.
* @param i #:~MtV
*/ xrXfLujn%
private void insertSort(int[] data, int start, int len) { I3ZlKI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %![%wI?
} N=JZtf/i
} Ih&rXQ$
} pG|+\k/B
} *2?-6
CTNeh%K;
堆排序： ^`HP&V
2"'<Yk9
package org.rut.util.algorithm.support; E1=WH-iA0
xw>\6VNt
import org.rut.util.algorithm.SortUtil; BA5b;+o-
2j*+^&M/
/** ~]d3 f
* @author treeroot _3;vir%)
* @since 2006-2-2 Epl\(
* @version 1.0 DCv=*=6w
*/ |4slG
public class HeapSort implements SortUtil.Sort{ LNA5!E
_gLj(<^9
/* (non-Javadoc) U= Gw(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SZ;Is,VgU4
*/ I}Fv4wlZG
public void sort(int[] data) { VssD
MaxHeap h=new MaxHeap(); hxXl0egI
h.init(data); fMRv:kNAt
for(int i=0;i h.remove(); C:?mOM#_
System.arraycopy(h.queue,1,data,0,data.length); dR^7d _!
} vFz#A/1
@`IMR$'
private static class MaxHeap{ Y]9AC
o>#ue<Bc6
void init(int[] data){ l2&s4ERqSm
this.queue=new int[data.length+1]; VJ8"Q
for(int i=0;i queue[++size]=data; ]1^F
fixUp(size); "1-gMob
} (]Pr[xB
} ++m^z` D
lCX*Q{s22
private int size=0; )zKZ<;#y
4P>4d +
private int[] queue; )Rlh[Y& r
1 m>x5Dbk!
public int get() { Cuk!I$
return queue[1]; DJ!<:9FD
} ;%wY fq~P
&nRbI:R
public void remove() { qgk-[zW#
SortUtil.swap(queue,1,size--); =!~6RwwwY
fixDown(1); odm!}stus
} c9 &LKJ6
file://fixdown b:c$EPK
private void fixDown(int k) { d:_3V rRZ
int j; )~Pj3
while ((j = k << 1) <= size) { ]y**ZFA
if (j < size %26amp;%26amp; queue[j] j++; kwM1f=!-
if (queue[k]>queue[j]) file://不用交换 a%IJ8t+mn
break; ]46-TuH
SortUtil.swap(queue,j,k); ){sn!5=
k = j; t=6[FK
} ##+f/Fxym
} ag7(nn0!
private void fixUp(int k) { #guq/g$
while (k > 1) { ZJod=^T
int j = k >> 1; 4)DI0b"
if (queue[j]>queue[k]) 88}=VS
break; |E(`9
SortUtil.swap(queue,j,k); ZDhl$m[m
k = j; JDI1l_Ga
} : U Yn
} 5LF#w_x
[%1 87dz:D
} 0C,2gcq
M?nYplC
} JtB]EvpL}
({5`C dVi
SortUtil： `El)uTnuZ[
T+q3]&
package org.rut.util.algorithm; @j{n V@|
i:@n6GW+iw
import org.rut.util.algorithm.support.BubbleSort; "h84D&V
import org.rut.util.algorithm.support.HeapSort; G(*7hs
import org.rut.util.algorithm.support.ImprovedMergeSort; S+LS!b
import org.rut.util.algorithm.support.ImprovedQuickSort; O^_$cq
import org.rut.util.algorithm.support.InsertSort; fPj*qi
import org.rut.util.algorithm.support.MergeSort; 9?6]Zag
import org.rut.util.algorithm.support.QuickSort; (9A`[TRwi
import org.rut.util.algorithm.support.SelectionSort; jW!x!8=
import org.rut.util.algorithm.support.ShellSort; 5RUhrE
u~-,kF@
/** c[6=&
* @author treeroot Rr!oT?6J?
* @since 2006-2-2 ^]_5oFRIj
* @version 1.0 DEFh&n
*/ /+p]VHP\
public class SortUtil { m|%L[h1
public final static int INSERT = 1; ,Qw\w,
public final static int BUBBLE = 2; Tl%n|pc
public final static int SELECTION = 3; FZi'#(y
public final static int SHELL = 4; UEb'b,O_9
public final static int QUICK = 5; |nu)=Ag
public final static int IMPROVED_QUICK = 6; `;R [*7
public final static int MERGE = 7; #n5DK{e
public final static int IMPROVED_MERGE = 8; -IP3I
public final static int HEAP = 9; H+O^el
"AayU
public static void sort(int[] data) { Wb7z&vj
sort(data, IMPROVED_QUICK); \qA^3L~;5
} G#f(oGn :
private static String[] name={ +'!4kwTR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :VvJx]
}; x$WdW+glZ-
l`' lqnhv
private static Sort[] impl=new Sort[]{ ~Bi{k'A9
new InsertSort(), MB#KLTwnT
new BubbleSort(), A:JWUx
new SelectionSort(), % njcWVP;
new ShellSort(), l0sBXs`3b
new QuickSort(), @0qDhv s
new ImprovedQuickSort(), /qeSR3WC
new MergeSort(), 0D=7Mef
new ImprovedMergeSort(), a+_F^
new HeapSort() M?FbBJ`sF
}; `BGU
n@e[5f9?x
public static String toString(int algorithm){ oKlOcws}
return name[algorithm-1]; NW*qw q
} (r!d4
Fu/{*4
public static void sort(int[] data, int algorithm) { j\^u_D
impl[algorithm-1].sort(data); 1(ud(8?|
} OBBEsD/bc
{R{Io|
public static interface Sort { ;=ci7IT'
public void sort(int[] data); *]uj0@S
} OQC.p,SO
y~jYGN
public static void swap(int[] data, int i, int j) { e|~s'{3
int temp = data; J ;e/S6l
data = data[j]; gL-\@4\wc
data[j] = temp; d O'apey
} ;^cc-bLvF
} ,x.2kb