[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; 7!q.MOYm
} V&R_A~<T
int i1=l; fvM|Jb
int i2=mid+1; 4~e6z(
for(int cur=l;cur<=r;cur++){ gx=2]~O1(
if(i1==mid+1) NBO&VYs|
data[cur]=temp[i2++]; ee*E:Ltz\
else if(i2>r) f/pr
data[cur]=temp[i1++]; WO+_|*&
else if(temp[i1] data[cur]=temp[i1++]; 4p]hY!7
else x<>In"QV
data[cur]=temp[i2++]; /S`d?AV
} e[%g'}D:-
} Ew2ksZ>B]&
J72YZrc
} _j?/O)M c
}>?"bcJ
改进后的归并排序: fHacVjJ
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package org.rut.util.algorithm.support; ILT.yxV
9 [wR/8Xm
import org.rut.util.algorithm.SortUtil; A{ Ejk|
\"Aw ATQ
/** jHpFl4VPz
* @author treeroot *h2)$^P%
* @since 2006-2-2 #6za
* @version 1.0 ("_tML 8/p
*/ ^vr`t9EE
public class ImprovedMergeSort implements SortUtil.Sort { -MItZ
~MW_=6U
private static final int THRESHOLD = 10; 22"/|S
u|8yV.=R
/* (Q6}N'T
* (non-Javadoc) BCw0kq@
* <'<{|$Pw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y0cB@pWp
*/ -\~D6OA
public void sort(int[] data) { Cs8e("w
int[] temp=new int[data.length]; ^ ,yh384
mergeSort(data,temp,0,data.length-1); \bumB<w(]
} Q~G>=J9
Uv(Uj3D
private void mergeSort(int[] data, int[] temp, int l, int r) { ^6Y:9+
int i, j, k; '>"-e'1m(
int mid = (l + r) / 2; \7A6+[ `fa
if (l == r) roE*8:Y
return; AE&IN.-
if ((mid - l) >= THRESHOLD) }|4dEao\
mergeSort(data, temp, l, mid); AV^Sla7|_
else ^n8r mh_%
insertSort(data, l, mid - l + 1); NRZ>03w
if ((r - mid) > THRESHOLD) Wo~#R
mergeSort(data, temp, mid + 1, r); y1+~IjY
else ee{8C~
insertSort(data, mid + 1, r - mid); O;~dao
Pdw[#X<[`
for (i = l; i <= mid; i++) { mdPEF)-
temp = data; PV/SzfvIq
} Mwd(?o
for (j = 1; j <= r - mid; j++) { o;2QZ"v
temp[r - j + 1] = data[j + mid]; M}BqSzd*
} \hFIg3
int a = temp[l]; m\?H <o0
int b = temp[r]; Jp]eFaqp
for (i = l, j = r, k = l; k <= r; k++) { 7cMSJM(]G
if (a < b) { PK|"+I0
data[k] = temp[i++]; Ae 3:"
a = temp; xk$U+8K
} else { 'hl4cHk14
data[k] = temp[j--]; J,j!
b = temp[j]; l-RwCw4f
} "1Oe bo2
} #OVf2 "
} ::A]p@
l:H}Y3_I
/** Ff@Cs0R
* @param data uGMmS9v$ J
* @param l BV01&.<|
* @param i QL_9a,R'r
*/ O6$d@r;EK]
private void insertSort(int[] data, int start, int len) { NM_Xy<.~E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9WhZ= Xk
} ]7yr.4?a
} }Pn]j7u!
} 27-GfC=7*
} JM-+p
dr iw\
堆排序： Kt3]r:&J
9k[>(LC
package org.rut.util.algorithm.support; wc#E:GJcK
X,"(G}KUA
import org.rut.util.algorithm.SortUtil; mIX[HDy:V$
Xv'5%o^i*
/** 8e3I@mv
* @author treeroot -r!sY+Z>
* @since 2006-2-2 8Cw+<A*
* @version 1.0 U%nLo[k
*/ u+Q<>>lU
public class HeapSort implements SortUtil.Sort{ 6@[7
lboi\GP|
/* (non-Javadoc) rW(<[2vg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7r4|>F
*/ YXr"
public void sort(int[] data) { ht1d[
MaxHeap h=new MaxHeap(); nD51,1>
h.init(data); UfWn\*J&k
for(int i=0;i h.remove(); O>H'ok
System.arraycopy(h.queue,1,data,0,data.length); A\v(!yg
} ^<VJ8jk<
[|!A3o
private static class MaxHeap{ K7CrRT3>6
gLL8-T[9
void init(int[] data){ -x?I6>{
this.queue=new int[data.length+1]; $+$S}i=
for(int i=0;i queue[++size]=data; ,=@%XMS
fixUp(size); ?|;q=p`t-
} vRQ7=N{3
} ~l@ h
gL:Vj%c
private int size=0; Z>si%Npm\
O<o>/HH$
private int[] queue; %2jRJ
*lT:P-
public int get() { }; ;Thfd
return queue[1]; g VPtd[r
} :ENdF `nC
KtO|14R:
public void remove() { (L3Etan4RE
SortUtil.swap(queue,1,size--); 6SGV}dAx
fixDown(1); 5v`[c+@F
} (:P-ef$]C
file://fixdown Gjh8>(
private void fixDown(int k) { <X b B;
int j; mhDC1lXF
while ((j = k << 1) <= size) { i=^!? i
if (j < size %26amp;%26amp; queue[j] j++; t) :'XGk@
if (queue[k]>queue[j]) file://不用交换 il5Qo
break; DQy<!Wb+
SortUtil.swap(queue,j,k); bk}'wcX<+]
k = j; p9`!.~[
} -E(0}\
} zv8AvNDK
private void fixUp(int k) { Sd |=*X
while (k > 1) { ._i|+[
int j = k >> 1; ~>"m`Q&[
if (queue[j]>queue[k]) zvgy$]y'\
break; ~]_U!r[FA
SortUtil.swap(queue,j,k); Ump$N#
k = j; gZHuyp(B
} %Y:"5fH
} 0Kytg\p}
lIUaGz|
} !5}u\
P\lEfsuR
} T{:~v+I=
$"P[nNW3
SortUtil： DQ*T2*L
* ",/7(
package org.rut.util.algorithm; fR$_=WWN>h
(& UQ^
import org.rut.util.algorithm.support.BubbleSort; . \t8s0A
import org.rut.util.algorithm.support.HeapSort; rn9n_)
import org.rut.util.algorithm.support.ImprovedMergeSort; Oe~x,=X)
import org.rut.util.algorithm.support.ImprovedQuickSort; 9>6DA^
import org.rut.util.algorithm.support.InsertSort; rV_i|
import org.rut.util.algorithm.support.MergeSort; @$aGVEcU$
import org.rut.util.algorithm.support.QuickSort; / :z<+SCh
import org.rut.util.algorithm.support.SelectionSort; x=M%QFe
import org.rut.util.algorithm.support.ShellSort; sW^e D;
/2.}m`5
/** K8bKTG\
* @author treeroot =f/CBYNw@V
* @since 2006-2-2 <%iRa$i5
* @version 1.0 xk*&zAt
*/ S T1V
public class SortUtil { QHDR*tB:{
public final static int INSERT = 1; ]T:a&DHC
public final static int BUBBLE = 2; b$;qtfJG
public final static int SELECTION = 3; _@5|r|P>
public final static int SHELL = 4; vk0b b3){D
public final static int QUICK = 5; 0Fw4}f.o
public final static int IMPROVED_QUICK = 6; DEw>f%&4
public final static int MERGE = 7; tP][o494\&
public final static int IMPROVED_MERGE = 8; B%^W$7 q
public final static int HEAP = 9; bt{b%r
@u @~gEt
public static void sort(int[] data) { 9]Fi2M
sort(data, IMPROVED_QUICK); 'CMbqLk#
} U #C@&2
private static String[] name={ akA7))Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1PB"1.wnd
}; #soV'SFG
bQ3txuha
private static Sort[] impl=new Sort[]{ (yb$h0HN
new InsertSort(), kz\Ss|jl
new BubbleSort(), ;l %$-/%
new SelectionSort(), ;aN_!! r
new ShellSort(), 5MCnGg@
new QuickSort(), ve]hE}o/}
new ImprovedQuickSort(), dfP4SJqq
new MergeSort(), @9tzk [
new ImprovedMergeSort(), <I#nwoHN
new HeapSort() w7@TM%nS
}; hm*cGYV/
*\(MG|S
public static String toString(int algorithm){ ~ \]?5 nj
return name[algorithm-1]; l+a1`O
} L</k+a?H!
{vq| 0t\-
public static void sort(int[] data, int algorithm) { u*T(n s l
impl[algorithm-1].sort(data); "g,`Ks ];
} xG(xG%J
J%u,qF}h
public static interface Sort { 'Qh1$X)R7a
public void sort(int[] data); T-LX>*
} BW:HKH.k
)dd1B>ej]
public static void swap(int[] data, int i, int j) { 2 EWXr+IU.
int temp = data; bp!Jjct
data = data[j]; O9C&1A|lA
data[j] = temp; eaAGlEW6J
} [{$%9lm
} \%|Xf[AX