[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; =^i K^)
} mEsb_3?#+
int i1=l; D:f=Z?L)>
int i2=mid+1; Od)y4nr3~
for(int cur=l;cur<=r;cur++){ X%3?sH
if(i1==mid+1) H!&_Tv[
data[cur]=temp[i2++]; Tjhy@3
else if(i2>r) (zsv!U
data[cur]=temp[i1++]; F"UI=7:o
else if(temp[i1] data[cur]=temp[i1++]; 6dV )pJd
else 40pz<-B
data[cur]=temp[i2++]; D>-r `
} -0x Q'1I
} 8-Y*b89
L!lmy&1
} 28`s+sH
3%5a&b
改进后的归并排序: p@nj6N.--
-5 D<zP/
package org.rut.util.algorithm.support; %1.F;-GdsW
YO$D-
import org.rut.util.algorithm.SortUtil; %9a3$OGZX
BdF/(Pg
/** yCvtglAJ4
* @author treeroot brs`R#e \
* @since 2006-2-2 ninWnQq
* @version 1.0 7HBf^N.
*/ &i(Ip'r
public class ImprovedMergeSort implements SortUtil.Sort { KE@+I.x
]B?M3`'>
private static final int THRESHOLD = 10; Hd\V?#H
.<F46?HS
/* `SsoRPW&$
* (non-Javadoc) 7XK0vKmW3
* 8hD[z}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cj<8r S4+
*/ tP7<WGHd/
public void sort(int[] data) { t15{>>f4>
int[] temp=new int[data.length]; 4P k%+l
mergeSort(data,temp,0,data.length-1); XFvl
} t`+A;%=K]
J\Pb/9M/
private void mergeSort(int[] data, int[] temp, int l, int r) { <Q\KS
int i, j, k; vxj:Y'}
int mid = (l + r) / 2; h_[{-WC
if (l == r) }!oEjcX'
return; .i I{
if ((mid - l) >= THRESHOLD) T+ZA"i+
mergeSort(data, temp, l, mid); $3G^}A"
else O573AA
insertSort(data, l, mid - l + 1); KF_fz
if ((r - mid) > THRESHOLD) n@RmH>"
mergeSort(data, temp, mid + 1, r); 9hfg/3t('
else suwR`2
insertSort(data, mid + 1, r - mid); "!V`_ S;
]s AuL!
for (i = l; i <= mid; i++) { c 'wRGMP
temp = data; G?'^"ae"Z
} gVfFEF.
for (j = 1; j <= r - mid; j++) { ,3Q~X$f
temp[r - j + 1] = data[j + mid]; w;`Jj-
} 6dR+qJa6i
int a = temp[l]; >5Yn`Fc5
int b = temp[r]; $t):r@L
for (i = l, j = r, k = l; k <= r; k++) { Y~g{9 <!
if (a < b) { B[GC@]HE
data[k] = temp[i++]; p%>sc
a = temp; =JIceLL
} else { z7bJV/f
data[k] = temp[j--]; `}l%61n0
b = temp[j]; tr[}F7n9
} '7sf)0\:<p
} PJC(:R(j
} <-`.u`
,%*UF6B M
/** BX0lk
* @param data $h{m")]
* @param l DOKe.k
* @param i kg]6q T;Y
*/ J 7R(X
private void insertSort(int[] data, int start, int len) { J&>@>47
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6+IhI?lI=
} _w4G|j$C
} DJ,LQj
} w~b:9_reY
} YQG<Q
<J&S[`U!
堆排序： ,SR7DiYg
dgkS5Q$/
package org.rut.util.algorithm.support; k56Qas+3=
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import org.rut.util.algorithm.SortUtil; b?i+nhqI
CvY+b^;
/** g%f5hy
* @author treeroot *#XZ*Ga
* @since 2006-2-2 ca_mift
* @version 1.0 "CJ~BJI%
*/ _Hv+2E[4Z
public class HeapSort implements SortUtil.Sort{ PR.3EL
wc;n= %
/* (non-Javadoc) qg oB}n%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z3+@[I$
*/ 7EE{*}?0E
public void sort(int[] data) { kP ]Up&'
MaxHeap h=new MaxHeap(); f$xXR$mjf
h.init(data); mQ:{>`
for(int i=0;i h.remove(); q,,
System.arraycopy(h.queue,1,data,0,data.length); \0b}Z#'0
} $9,&BW_*
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private static class MaxHeap{ &W@2n&U.q
^z{szy?Fg
void init(int[] data){ z$%twBg}#
this.queue=new int[data.length+1]; eIkKsgr>
for(int i=0;i queue[++size]=data; Food<(!.>
fixUp(size); Y~I<Locv
} D!rPF)K )
} 7&ED>Bk
}mj9$=B4
private int size=0; AEyvljv
]u|fLK.|
private int[] queue; b5NVQ8Mq
8F}drK9>F
public int get() { 'I]XX==_
return queue[1]; )!"fUz$
} m\`>N_4*9
e2O6q05 ?Q
public void remove() { _? gCOr
SortUtil.swap(queue,1,size--); j,k3]bP
fixDown(1); h !^= c
} 8q[; 0
file://fixdown &zEQbHK6
private void fixDown(int k) { w>%@Ug["
int j; wh8';LZ>R
while ((j = k << 1) <= size) { S[Du >
if (j < size %26amp;%26amp; queue[j] j++; }D#:NlMp
if (queue[k]>queue[j]) file://不用交换 DzAZv/h76
break; ;V}:0{p
SortUtil.swap(queue,j,k); CxFd/X,
k = j; yH/A9L,Z
} .e~"+Pe6b
} }UhYwJf89
private void fixUp(int k) { $v0,)ALi
while (k > 1) { 3_
int j = k >> 1; S+T/(-W
if (queue[j]>queue[k]) h aAY=:
break; ')"+ a^c
SortUtil.swap(queue,j,k); CvoFt=c$jE
k = j; &W2*'$j"_
} 3z8i0
} U)J5K
'$9o(m#
} YWFE*wQ!
^jL '*&l
} R BYhU55B
|6E_N5~
SortUtil： o`bc/3!
2d&F<J<sU
package org.rut.util.algorithm; ;k<dp7^
80=0S^gEZ
import org.rut.util.algorithm.support.BubbleSort; j6m;03<|
import org.rut.util.algorithm.support.HeapSort; K zWo}tT
import org.rut.util.algorithm.support.ImprovedMergeSort; 'R7 \
import org.rut.util.algorithm.support.ImprovedQuickSort; V@ >(xe7
import org.rut.util.algorithm.support.InsertSort; n#(pT3&
import org.rut.util.algorithm.support.MergeSort; V(7,N(
import org.rut.util.algorithm.support.QuickSort; z#*.9/y\^R
import org.rut.util.algorithm.support.SelectionSort; .xRdKt!p
import org.rut.util.algorithm.support.ShellSort; y\?ey'o
f"ezmZI
/** 3Ua?^2l
* @author treeroot U$OZkHA[
* @since 2006-2-2 t3;Zx+Br
* @version 1.0 2Rk}ovtD[
*/ s2<!Zb4
public class SortUtil { Zy}tZRG
public final static int INSERT = 1; Un6R)MVT
public final static int BUBBLE = 2; 2JfSi2T
public final static int SELECTION = 3; M>AxVL
public final static int SHELL = 4; 7L!JP:v
public final static int QUICK = 5; 9d5$cV
public final static int IMPROVED_QUICK = 6; Tc WCr
public final static int MERGE = 7; QNNURf\[(
public final static int IMPROVED_MERGE = 8; Lljn\5!r<
public final static int HEAP = 9; B~]Kqp7yU
n!jmxl$
public static void sort(int[] data) { jZXa R
sort(data, IMPROVED_QUICK); aO'#!k*R
} )^j_O^T5
private static String[] name={ um2a#6uo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p+d-7'?I
}; x?h/e;
9K+>;`
private static Sort[] impl=new Sort[]{ 2\xw2VQ@P
new InsertSort(), ~7]V^tG
new BubbleSort(), *8}b&4O~
new SelectionSort(), t-\+t<;
new ShellSort(), Q0U~s\<
new QuickSort(), wI%M3XaBws
new ImprovedQuickSort(), Itl8#LpLM
new MergeSort(), l1+l@r\
new ImprovedMergeSort(), |2(q9j
new HeapSort() ;ArwEzo(
}; CFtQPTw
}%wd1`l7
public static String toString(int algorithm){ 3lP;=*m.
return name[algorithm-1]; 'a~@q~!
} ~ ld.I4
A}9Z%U
public static void sort(int[] data, int algorithm) { .t8)`MU6.
impl[algorithm-1].sort(data); >xFvfuyC
} 1NZ"\9=U
F y+NJSG
public static interface Sort { z0 "DbZ;d
public void sort(int[] data); _7Y h[I4
} &W<7!U:2m
#ArrQeO 5_
public static void swap(int[] data, int i, int j) { 6h:QSVfx
int temp = data; n Bu!2c
data = data[j]; ,Z`}!%?
data[j] = temp; H/,KY/>i
} eaw!5]huu
} ^m\o(R