[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; {tXyz[;i1}
} Wh?3vZ^
int i1=l; X5)].[d
int i2=mid+1; yEL5U{
for(int cur=l;cur<=r;cur++){ @vi;P ^1!
if(i1==mid+1) F^DDN7AKH
data[cur]=temp[i2++]; k+u L^teyS
else if(i2>r) XJ1<!tl
data[cur]=temp[i1++]; Vg`32nRN
else if(temp[i1] data[cur]=temp[i1++]; yD^Q&1
else c_6~zb?k+m
data[cur]=temp[i2++]; h],l`lT1\
} }(UU~V
} OLJ|gunA#
H1ox>sC
} UDgUbi^v|D
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改进后的归并排序: V(!-xu1,
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package org.rut.util.algorithm.support; 8{%[|Ye
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import org.rut.util.algorithm.SortUtil; $2v{4WP7G
ftqeiZ 2
/** fXx !_Z
* @author treeroot 2$> <rB
* @since 2006-2-2 tb'O:/
* @version 1.0 Z-'xJq
*/ ^1+=HdN,
public class ImprovedMergeSort implements SortUtil.Sort { d/I*$UC
{dNWQE*\c
private static final int THRESHOLD = 10; )WF*fcx{
S4>1d-
/* K1|xatx1V
* (non-Javadoc) ?wj1t!83
* L%[b6<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "xMnD(p
*/ ,uhOf! |
public void sort(int[] data) { zqGo7;;#
int[] temp=new int[data.length]; m^YYdyn]M
mergeSort(data,temp,0,data.length-1); Cq%1j[
} OO?BN!
I(0 *cWO
private void mergeSort(int[] data, int[] temp, int l, int r) { 6tT*b@/_o
int i, j, k; y[~w2a&+
int mid = (l + r) / 2; E<4'4)FHuQ
if (l == r) V%'+ ob6
return; A:Kit_A
if ((mid - l) >= THRESHOLD) Ub*O*nre
mergeSort(data, temp, l, mid); CW;=q[+w
else hT$/B|
insertSort(data, l, mid - l + 1); CoQ<Ky}*
if ((r - mid) > THRESHOLD) .hytn`+9
mergeSort(data, temp, mid + 1, r); :"~n` Q2[
else C1SCV^#
insertSort(data, mid + 1, r - mid); $n9Bp'<
4X:S#z
for (i = l; i <= mid; i++) { Hyz:i)2
temp = data; + Awo\;@,
} ~&T%u.u7
for (j = 1; j <= r - mid; j++) { lX|d:HFtP
temp[r - j + 1] = data[j + mid]; L[.RV*sL
} r2xIbZ
int a = temp[l]; m\ (crkN
int b = temp[r]; #TKByOcD2!
for (i = l, j = r, k = l; k <= r; k++) { 3Ay<2v
if (a < b) { -|3feYb'
data[k] = temp[i++]; }E](NvCq
a = temp; $]S*(K3U~
} else { 85]3y%f9
data[k] = temp[j--]; j21nh>d
b = temp[j]; Pa\"l'!>^
} .7M:AS>
} {G4{4D }
} yM*f}S/ (
rIZ^ix-N
/** ).9m6.%Uk
* @param data -jQMh
* @param l 72{Ce7J4
* @param i DmpG35Jk
*/ hy{1Ea/T
private void insertSort(int[] data, int start, int len) { 7!%xJ!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X) xeq
} 4n,>EA85
} q, XRb
} ;-!j,V+$h
} I<^&~==
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堆排序： O7D61~G]
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package org.rut.util.algorithm.support; ;ax%H @o
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import org.rut.util.algorithm.SortUtil; Sk|DVV$
wDz}32wB
/** ! 4{T<s;q
* @author treeroot "$rmy>d
* @since 2006-2-2 <WRrB `nO
* @version 1.0 5Cjh%rj(jl
*/ >7I"_#x1:
public class HeapSort implements SortUtil.Sort{ A/w7(
y ZR\(\?<
/* (non-Javadoc) 86<[!ZM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X4Y!Z/b
*/ T?V!%AqY:
public void sort(int[] data) { v[I,N$:
MaxHeap h=new MaxHeap(); $`Hb-
h.init(data); Fl0 :Z
for(int i=0;i h.remove(); T+U,?2nF:
System.arraycopy(h.queue,1,data,0,data.length); >,)tRQS
} N=@Nn)
97SOa.@
private static class MaxHeap{ q}0xQjpo
@<,YUp,%S
void init(int[] data){ b'$fr6"O1
this.queue=new int[data.length+1]; p`2w\P3;)
for(int i=0;i queue[++size]=data; uKE?VNC]
fixUp(size); EX9os
} |v31weD8
} t1MK5B5jH
N#zh$0!8bJ
private int size=0; TZYz`l+v
l0-zu6iw
private int[] queue; mel(C1b"j/
t2 0Es
public int get() { $K}Y
return queue[1]; -N~eb^3[c
} 3C7}V{?
J2d3&6
public void remove() { T.x"a$AU
SortUtil.swap(queue,1,size--); HHcWyu
fixDown(1); oQ"J>`',
} ~|5B
file://fixdown #<EMG|&(
private void fixDown(int k) { >0Gdxj]\
int j; =!{ E!3>*D
while ((j = k << 1) <= size) { Qq*Ks 5
if (j < size %26amp;%26amp; queue[j] j++; C.Ty\@U
if (queue[k]>queue[j]) file://不用交换 m6 @,J?X
break; z6>Rv9f
SortUtil.swap(queue,j,k); J.^%VnrFO9
k = j; _m2p>(N|
} AIX?840V
} "{"745H5
private void fixUp(int k) { %e|.a)78
while (k > 1) { )$oboAv#
int j = k >> 1; C6ry]R@
if (queue[j]>queue[k]) gyf9D]W
break; T\b-<Xle
SortUtil.swap(queue,j,k); .qGfLvx%
k = j; ~![J~CkPS
} FvVR \a
} N~t4qlC/
w_h}c$;GK
} CPt62j8
1b4/
} #9FY;~
nTQ&nu!
SortUtil： +xG
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package org.rut.util.algorithm; yHIZpU|(j
|h(05Kbk
import org.rut.util.algorithm.support.BubbleSort; tVFydN~
import org.rut.util.algorithm.support.HeapSort; O/1:2G/`
import org.rut.util.algorithm.support.ImprovedMergeSort; I5mtr
import org.rut.util.algorithm.support.ImprovedQuickSort; W&`{3L
import org.rut.util.algorithm.support.InsertSort; m(o^9R_=^9
import org.rut.util.algorithm.support.MergeSort; "nQ&~KQ
import org.rut.util.algorithm.support.QuickSort; 0P7sMCYu
import org.rut.util.algorithm.support.SelectionSort; -jdhdh
import org.rut.util.algorithm.support.ShellSort; .Mb<.R3
3tu:Vc.:M
/** V~!lY\
* @author treeroot 6<qVeO&uZ
* @since 2006-2-2 9XEP:}5,
* @version 1.0 bji^b@us_
*/ 8PXjdHR
public class SortUtil { 3]cW08"c
public final static int INSERT = 1; OuuN~yC
public final static int BUBBLE = 2; #[$zbZ(I>:
public final static int SELECTION = 3; dJ&f +
public final static int SHELL = 4; Ka+N5 T.f
public final static int QUICK = 5; [B+]F~}@
public final static int IMPROVED_QUICK = 6; eb#p-=^KP
public final static int MERGE = 7; +u\kTn
public final static int IMPROVED_MERGE = 8; 8LH\a.>
public final static int HEAP = 9; )Lb?ZXT3
2vh@KnNU
public static void sort(int[] data) { "f|xIK`c
sort(data, IMPROVED_QUICK); wpI_yp
} D8*tzu-
private static String[] name={ &@rXt!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J_eu(d[9
}; On*pI37(\
kX)QHNzP
private static Sort[] impl=new Sort[]{ .mwB'Ll
new InsertSort(), +]dh`8*8>1
new BubbleSort(), H&_drxUq;L
new SelectionSort(), G%FLt[
new ShellSort(), S\"#E:A
new QuickSort(), ]21`x
new ImprovedQuickSort(), Ehw2o-s^
new MergeSort(), !LAC_b
new ImprovedMergeSort(), A-*y[/
new HeapSort() 2PTAIm Rq
}; o>i@2_r\&H
TnXx;v
public static String toString(int algorithm){ (mOL<h[)IP
return name[algorithm-1]; M,we9];N
} Q@0Zh,l
3]wV 1<K
public static void sort(int[] data, int algorithm) { KJ#SE|
impl[algorithm-1].sort(data); oGvk,mh"(
} e~P4>3
mIh >8))E
public static interface Sort { hSgH;k
public void sort(int[] data); e]DuV)k&
} Bj*\)lG<
qac8zt#2 C
public static void swap(int[] data, int i, int j) { {v>8Kp7_R
int temp = data; GJTakhj3
data = data[j]; `W9~u: F
data[j] = temp; f[fH1cu&`
} Kv~'*A)d
} Ls6C*<8