[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; fpM#XFj
} (_* wt]"'
int i1=l; A`O<6
int i2=mid+1; +.[\g|G
for(int cur=l;cur<=r;cur++){ _9:@Vl]Q@
if(i1==mid+1) xChI,~i
data[cur]=temp[i2++]; lA>\Ko
else if(i2>r) j:5%ppIY
data[cur]=temp[i1++]; ,1Qd\8N9
else if(temp[i1] data[cur]=temp[i1++]; 31Cq22"
else {5c]Mn"r
data[cur]=temp[i2++]; N#N0Q0W=
} X7UBopm&
} EjEFg#q
<<MjC5
} ]O:M$ $
ps1YQ3Ep&
改进后的归并排序: ;D ~L|
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package org.rut.util.algorithm.support; ~Pk0u{,4XQ
4yMW^:@
import org.rut.util.algorithm.SortUtil; ?_6YtR,{
b|^I<7
/** wh 0<Uv
* @author treeroot v4?iOD
* @since 2006-2-2 ^CzYDq
* @version 1.0 ~Y5l+EF#
*/ V6iL5&
public class ImprovedMergeSort implements SortUtil.Sort { "oJ(J{Jat
eR']#Q46{T
private static final int THRESHOLD = 10; B\j~)vg
'(@YK4_M
/* 5/ecaAB2
* (non-Javadoc) )tZ`K |
* 3bC yTZk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }{7e7tW6
*/ #*q2d
public void sort(int[] data) { q5&Ci`
int[] temp=new int[data.length]; OKuD"
mergeSort(data,temp,0,data.length-1); HgJb4Fi
} 'TN)Lb*
QHf$f@bjI
private void mergeSort(int[] data, int[] temp, int l, int r) { g+q@i{Yn
int i, j, k; E|Bd>G
int mid = (l + r) / 2; r$)$n&j
if (l == r) U+]Jw\\l
return; ^.X[)U
if ((mid - l) >= THRESHOLD) 1uG=`k8'k
mergeSort(data, temp, l, mid); 1r`i]1<H
else SVP:D3)
insertSort(data, l, mid - l + 1); \Z5+$Ij
if ((r - mid) > THRESHOLD) )&NAs
mergeSort(data, temp, mid + 1, r); t\U$8l_;
else (4~WWU (iT
insertSort(data, mid + 1, r - mid); K6\` __mLf
34C``i
for (i = l; i <= mid; i++) { u7]<=*V]
temp = data; _45cH{$sA
} 5P^U_
for (j = 1; j <= r - mid; j++) { _&{%Wc5W~F
temp[r - j + 1] = data[j + mid]; D\L!F6taS
} Yt1mB[&f^
int a = temp[l]; N}/>rD
int b = temp[r]; 8q_0,>w%
for (i = l, j = r, k = l; k <= r; k++) { "|LQK0q3
if (a < b) { Q49BU@xX
data[k] = temp[i++]; }*;EFR6'
a = temp; (*^DN{5
} else { 10N,?a
data[k] = temp[j--]; B< ;==|
b = temp[j]; &a~=b,
} Jgx8-\8
} w[fDk1H)
} r7z6___
G\Hq/4
/** vP]9;mQ
* @param data (}H ,ng'4
* @param l n`5WXpz4;
* @param i ~^o=a?L`<
*/ _,;%mK
private void insertSort(int[] data, int start, int len) { Y5TS>iEE]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N_'+B+U?
} #a}N"*P
} )q+4k m6
} AqYxWk3>
} X\2_;zwf
@@pq'iRn
堆排序： q(9%^cV6
4 eh=f!(+
package org.rut.util.algorithm.support; XoL[ r67Z
-ut=8(6&
import org.rut.util.algorithm.SortUtil; =:K@zlO:
.P/xs4
/** +^Jwo)R'b
* @author treeroot Xz1c6mX|o
* @since 2006-2-2 8fO8Dob]\Y
* @version 1.0 XL"=vbD
*/ v&0d$@6/U
public class HeapSort implements SortUtil.Sort{ >q|Q-I~gs
Z] {@H
/* (non-Javadoc) JLUms
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i&F~=Q`
*/ fGO*%)
public void sort(int[] data) { zeOb Aw1O
MaxHeap h=new MaxHeap(); >}]H;& l
h.init(data); U1\MA6pXW
for(int i=0;i h.remove(); HWtPLlNt
System.arraycopy(h.queue,1,data,0,data.length); !LSs9_w
} Q_lu`F|
oS!/|#mn
private static class MaxHeap{ S:97B\u`
D0%FELG05
void init(int[] data){ 0VG=?dq
this.queue=new int[data.length+1]; )1z4q`
for(int i=0;i queue[++size]=data; O)<r>vqe}
fixUp(size); 9".Uc8^p/F
} 8&Wx@QI
} "Z9^}
wiV&xl
private int size=0; d=nh
`QLowna
private int[] queue; '5WN,Vy8.
i+U51t<
public int get() { !$E~\uT
return queue[1]; wO.B~`y
} 'Kd7l}e!
`i4I!E
public void remove() { !u0U5>ccw
SortUtil.swap(queue,1,size--); .CmL7 5
fixDown(1); ?'LM7RE$X6
} r%[1$mTOR
file://fixdown 7-g^2sa'(
private void fixDown(int k) { "gg(tp45
int j; 1}DerX6
while ((j = k << 1) <= size) { :|($,3*
if (j < size %26amp;%26amp; queue[j] j++; It\BbG=
if (queue[k]>queue[j]) file://不用交换 -d_ 7*>m$
break; &Q+]t"OA!
SortUtil.swap(queue,j,k); w%~qB5wF6
k = j; =F[lg?g
} Nh :JU?h
} vK'9{q|g
private void fixUp(int k) { ;_bq9x
while (k > 1) { uE"2kn
int j = k >> 1; ]-rczl|o
if (queue[j]>queue[k]) EFNdiv$wF
break; wLSjXpP8
SortUtil.swap(queue,j,k); }!knU3J
k = j; aKOf;^@
} ,E]|\_]
} V%o#AfMI_
m`a>,%}P"
} j,ZW[*M
9dw0<qw1%
} ?:JdRnH\
s#`cX0L)
SortUtil： ;$[VX/A`f
QS%,7'EG
package org.rut.util.algorithm; wK ][qZ ]
/J8o_EV
import org.rut.util.algorithm.support.BubbleSort; q4zSS #]A
import org.rut.util.algorithm.support.HeapSort; nYgx9Q"<om
import org.rut.util.algorithm.support.ImprovedMergeSort; gm}C\q9
import org.rut.util.algorithm.support.ImprovedQuickSort; FBbm4NB
import org.rut.util.algorithm.support.InsertSort; &BTfDsxAK
import org.rut.util.algorithm.support.MergeSort; !yk7HaP
import org.rut.util.algorithm.support.QuickSort; mR6E]TuM
import org.rut.util.algorithm.support.SelectionSort; P69>gBZYD
import org.rut.util.algorithm.support.ShellSort; b/G8Mr
;]"n?uo
/** ;\q<zO@x
* @author treeroot ew/KZE
* @since 2006-2-2 @u<0_r t
* @version 1.0 l#|J rU!
*/ 'H FwP\HX
public class SortUtil { I(y`)$}
public final static int INSERT = 1; 0A@-9w=u
public final static int BUBBLE = 2; "1\(ZKG8^Q
public final static int SELECTION = 3; =^ gvZ|]
public final static int SHELL = 4; @V7;TJk
public final static int QUICK = 5; ,&4zKm
public final static int IMPROVED_QUICK = 6; !__D}k,
public final static int MERGE = 7; @gY'YA8m
public final static int IMPROVED_MERGE = 8; EqYz,%I%
public final static int HEAP = 9; 0.3^
a?l_-Fi
public static void sort(int[] data) { !HbqbS22
sort(data, IMPROVED_QUICK); 37,L**Dgs
} C!`>cUhE{
private static String[] name={ c;nx59w]q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nJW_a&'
}; -.^=Z!=M
ho(5r5SNE
private static Sort[] impl=new Sort[]{ % d4+Ctrp-
new InsertSort(), $;Q=iv3
new BubbleSort(), [Aa[&RX+9
new SelectionSort(), +q$xw}+PK
new ShellSort(), _Eszr(zJ
new QuickSort(), j#4+-
new ImprovedQuickSort(), ,K`E&hS
new MergeSort(), <tGI]@Nwk
new ImprovedMergeSort(), #IbS
new HeapSort() Ixyvn#ux)
}; Bd/} %4V\@
N,h1$)\B#
public static String toString(int algorithm){ VM=hQYe
return name[algorithm-1]; {_?T:`
} zK[ 7:<
5/zf x
public static void sort(int[] data, int algorithm) { fpI;`s
impl[algorithm-1].sort(data); >2FAi.,
} Sa(yjF1
z%++\.g_
public static interface Sort { X!7czt
public void sort(int[] data); Ompi~
} "m wl-=
>SY2LmV'a
public static void swap(int[] data, int i, int j) { hwEZj`9
int temp = data; u4`mQ6
data = data[j]; +R3\cRM
data[j] = temp; 3(cU)
} A%.J%[MVz
} Q:'qw#P/C