[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; wYXQlxdy
} `6(S^P
int i1=l; w>&aEv/f
int i2=mid+1; Mmj;-u
for(int cur=l;cur<=r;cur++){ G^|:N[>B
if(i1==mid+1) 9 RgVK{F
data[cur]=temp[i2++]; tmYz R%i
else if(i2>r) GT.,
data[cur]=temp[i1++]; #powub
else if(temp[i1] data[cur]=temp[i1++]; yx8z4*]kH
else ;\dBfP
data[cur]=temp[i2++]; :A_@,Q
} {%5eMyF#
} 2DDtu[}
T@B/xAq5!
} @tnz]^V
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改进后的归并排序: l}|%5.5-
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package org.rut.util.algorithm.support; !;v|'I
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import org.rut.util.algorithm.SortUtil; R$<&ie6UQ
'3tCH)s
/** M#6W(|V/
* @author treeroot 1<@W6@]
* @since 2006-2-2 7M~K,E(7~
* @version 1.0 `cUl7 'j
*/ lIS-4QX1
public class ImprovedMergeSort implements SortUtil.Sort { :J@gmY:C
7t0=[i
private static final int THRESHOLD = 10; Qx#"q'2
'@KEi%-^>
/* 9wwqcx)3(
* (non-Javadoc) B%b4v
* L|xbR#v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }@+0/W?\.
*/ :U%W%
public void sort(int[] data) { VA_PvL.9
int[] temp=new int[data.length]; dn+KH+v
mergeSort(data,temp,0,data.length-1); \V8PhO;j
} hx%v+/
m}t`FsB.
private void mergeSort(int[] data, int[] temp, int l, int r) { ,!y$qVg'\f
int i, j, k; ~Ea} /Au
int mid = (l + r) / 2; $a"Oc
if (l == r) )9`qG:b'
return; $|@@Qk/T
if ((mid - l) >= THRESHOLD) d.d/<
mergeSort(data, temp, l, mid); ,/F~Y&1I
else IueFx u
insertSort(data, l, mid - l + 1); vMH
if ((r - mid) > THRESHOLD) b9HtR-iR;
mergeSort(data, temp, mid + 1, r); w``ST
else U$ElV]N
insertSort(data, mid + 1, r - mid); /]Md~=yNp
:>f )g
for (i = l; i <= mid; i++) { #a,PZDaE
temp = data; joAv{Tc
} R"t,xM
for (j = 1; j <= r - mid; j++) { rcG"o\g@+
temp[r - j + 1] = data[j + mid]; D'PI1 0t
} 8^1 Te m
int a = temp[l]; 08\,<9
int b = temp[r]; V5>B])yQ
for (i = l, j = r, k = l; k <= r; k++) { Flm%T-Dl
if (a < b) { Vv=. -&'
data[k] = temp[i++]; y/7\?qfTk
a = temp; S g![Lsj
} else { #r\4sVg
data[k] = temp[j--]; A]oV"`f
b = temp[j]; p6Gy,C.
} J<h$ wM
} rw JIx|(
} wJo}!{bN
;$wVu|&
/** 2uW; xfeY
* @param data 3;A)W18]
* @param l K Z91-
* @param i ?NsW|w_
*/ d/kv|$XW
private void insertSort(int[] data, int start, int len) { _A9AEi'.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +\ .Lp 5
} U!\.]jfS
} e6$WQd`O
} r[iflBP
} h3 }OX{k
I,vJbvvl!
堆排序： `b7t4d*
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package org.rut.util.algorithm.support; Lk}J8 V^2
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import org.rut.util.algorithm.SortUtil; FWgpnI\X|{
8'io$6d=
/** RMu~l@
* @author treeroot JP[K;/
* @since 2006-2-2 ,w4V?>l
* @version 1.0 R$[vm6T?
*/ `Eo.v#<
public class HeapSort implements SortUtil.Sort{ g(CI;f}y
,R* ]>'
/* (non-Javadoc) I:1C8*/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .|i.Cq8
*/ [5Mr@f4I
public void sort(int[] data) { Q sCheHP
MaxHeap h=new MaxHeap(); $5%SNzzl
h.init(data); S9FE
for(int i=0;i h.remove(); YO}<Ytx
System.arraycopy(h.queue,1,data,0,data.length); M@v.c;Lt
} T!)(Dv8@F
E""bTz@
private static class MaxHeap{ P8/0H(,
z[qDkL
void init(int[] data){ Yufc{M00
this.queue=new int[data.length+1]; a~y'RyA
for(int i=0;i queue[++size]=data; 2.%ITB
fixUp(size); t&e{_|i#+
} p947w,1![
} 5#E`=C%
]Gq !`O1
private int size=0; 88wa7i*
3eQ&F~S
private int[] queue; -]M5wb2,
LyFN.2qw
public int get() { Qj3EXb
return queue[1]; <x>Mo
} ds[|
OYn}5RN
public void remove() { /hyN;.hpOO
SortUtil.swap(queue,1,size--); )bscBj@
fixDown(1); T{[=oH+
} $*=<Yw4
file://fixdown h>m"GpF x
private void fixDown(int k) { ge8ZsaiU
int j; draN0vf
while ((j = k << 1) <= size) { a<bwzX|.
if (j < size %26amp;%26amp; queue[j] j++; kc&U'&RgY
if (queue[k]>queue[j]) file://不用交换 S;`A{Mow
break; .U]-j\
SortUtil.swap(queue,j,k); v):Or'$~M
k = j; Y`a3tO=Pd
} r3UUlR/Do
} TAW/zpps$
private void fixUp(int k) { I9ep`X6Y
while (k > 1) { o|["SYIf
int j = k >> 1; @b2aNS<T
if (queue[j]>queue[k]) 8FY?!C
break; H"WprHe
SortUtil.swap(queue,j,k); P+/e2Y
k = j; Mb~F%_
} [ v*ju!
} s!$7(Q86R
P-"y3 ZE=
} $-sHWYZ
-ZLJeY L
} & >fQp(f
97!;.f-
SortUtil： Ds:'Lb
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package org.rut.util.algorithm; *J`O"a
?&1!vz
import org.rut.util.algorithm.support.BubbleSort; TOQP'/
import org.rut.util.algorithm.support.HeapSort; /mzlH
import org.rut.util.algorithm.support.ImprovedMergeSort; Qt<&WB fn
import org.rut.util.algorithm.support.ImprovedQuickSort; '^UI,"Ti
import org.rut.util.algorithm.support.InsertSort; qUb&
import org.rut.util.algorithm.support.MergeSort; 7-fb.V9
import org.rut.util.algorithm.support.QuickSort; :d'8x
import org.rut.util.algorithm.support.SelectionSort; L~N460
import org.rut.util.algorithm.support.ShellSort; d%n-[ZL
' S/gmn
/** IJcsmNWm
* @author treeroot LZxNAua
* @since 2006-2-2 4^o^F-k'
* @version 1.0 .(k|wX[Fu~
*/ { 2f-8Z&>
public class SortUtil { FfT`;j
public final static int INSERT = 1; '!B&:X)
public final static int BUBBLE = 2; +ami?#Sz*;
public final static int SELECTION = 3; ~((O8@}J
public final static int SHELL = 4; KF:78C
public final static int QUICK = 5; l+0oS'`V*L
public final static int IMPROVED_QUICK = 6; )zDCu`
public final static int MERGE = 7; }i&/G+_
public final static int IMPROVED_MERGE = 8; [j+sC*
public final static int HEAP = 9; (KZ{^X?a
5*u+q2\F
public static void sort(int[] data) { Y(Hs#Kn{
sort(data, IMPROVED_QUICK); SQ+Gvq%Q]
} Z6MO^_m2
private static String[] name={ Dk51z@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SiN0OB
}; M x"\5i
@gK?\URoT
private static Sort[] impl=new Sort[]{ XC#oB~K'
new InsertSort(), ]JQULE)
new BubbleSort(), dft!lBN
new SelectionSort(), 6(R<{{
new ShellSort(), t\O16O7S
new QuickSort(), o}p n0KO,
new ImprovedQuickSort(), V0a3<6@4
new MergeSort(), :NTO03F7v
new ImprovedMergeSort(), p!AAFmc
new HeapSort() (A.C]hD
}; <(#ej4ar,
XW92gI<O
public static String toString(int algorithm){ 0jWVp-y
return name[algorithm-1]; \cM2k-
} %^6F_F_jS
SSzIih@u
public static void sort(int[] data, int algorithm) { _7y[B&g[r
impl[algorithm-1].sort(data); ;8 lfOMf
} +&H4m=D-#a
es0hm2HT3
public static interface Sort { [{/jI\?v
public void sort(int[] data); n~Lt\K:
} 3Tm+g2w2V8
m.0*NW
public static void swap(int[] data, int i, int j) { j![\& z
int temp = data; |;{6&S
data = data[j]; 1G`Pmh@
data[j] = temp; 3o/[t
} dqcL]e
} L-&\\{X