[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; hwF9LD~^
} UhuEE
int i1=l; 3xS+Pu\)
int i2=mid+1; utIR\e#:B
for(int cur=l;cur<=r;cur++){ :V1ttRW}52
if(i1==mid+1) #m_3ls}W$
data[cur]=temp[i2++]; _t<&#D~
else if(i2>r) R<$_ <z
data[cur]=temp[i1++]; uq<kT[
else if(temp[i1] data[cur]=temp[i1++]; v"M5';ZS>
else gL%%2 }$
data[cur]=temp[i2++]; r|$@Wsb?#
} noY~fq/U
} m~;fklX S
:^7P. lhK
} e?W-vi%
'<N^u@tF7
改进后的归并排序: `"CIy_m
)eFXjnHN
package org.rut.util.algorithm.support; #clOpyT*
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import org.rut.util.algorithm.SortUtil; 9kmEg$WM
r0ml|PX
/** FEqs4<}E
* @author treeroot EBjSK/
* @since 2006-2-2 MB]8iy8
* @version 1.0 O;RsYs9
*/ +X[+SF)!
public class ImprovedMergeSort implements SortUtil.Sort { o&]b\dV
nulCk33x'=
private static final int THRESHOLD = 10; t)|*-=
F?!P7 zW
/* yWI30hW
* (non-Javadoc) Vfkm{*t)
* hV5Aw;7C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g)7~vm2/,
*/ *1FDK{
public void sort(int[] data) { Rf*we+
int[] temp=new int[data.length]; RTN?[`
mergeSort(data,temp,0,data.length-1); l1(6*+
} 0vN<0
(Fc\*Vn
private void mergeSort(int[] data, int[] temp, int l, int r) { 2$=U#!OtU
int i, j, k; \Fd6Q_
int mid = (l + r) / 2; NfG<!
if (l == r) B/"TaXVU
return; YbaaX{7^
if ((mid - l) >= THRESHOLD) >*jcXao^
mergeSort(data, temp, l, mid); eVL#3|=
else ${(v Er#}k
insertSort(data, l, mid - l + 1); a1p Z{Od
if ((r - mid) > THRESHOLD) uw'>tb@
mergeSort(data, temp, mid + 1, r); ><<(6
else Lhg4fuos@)
insertSort(data, mid + 1, r - mid); ckR>ps[u
L$R"?O7
for (i = l; i <= mid; i++) { { +d](+$
temp = data; i?+ZrAx>
} cd_\?7
for (j = 1; j <= r - mid; j++) { JbT+w\o
temp[r - j + 1] = data[j + mid]; #2*l"3.$.R
} P2HR4`c
int a = temp[l]; X.~z:W+
int b = temp[r]; ze* =7
for (i = l, j = r, k = l; k <= r; k++) { =Uy;8et
if (a < b) { <(YE_<F*
data[k] = temp[i++]; sb8%!>C
a = temp; -Jqm0)2
} else { +ucj>g1(#
data[k] = temp[j--]; G- _h 2
b = temp[j]; #G</RYM~m
} xBba&A]=
} [k1N-';;;
} @VdkmqXz
NifD pqjgt
/** jA<(#lm;
* @param data 3y&N}'R(F
* @param l M%(B6};J
* @param i 'p%aHK{
*/ m+66x {M2c
private void insertSort(int[] data, int start, int len) { %:yp>nm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Eb 8vnB#
} s &4k
} ?= G+L0t
} WBb@\|V|
} L7kNQ/
qp#Is{=m
堆排序： 36]pE<
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package org.rut.util.algorithm.support; w&c6iFMd0
xIt'o(jQH
import org.rut.util.algorithm.SortUtil; Z;=h=
;v#BguM
/** |nOqy&B
* @author treeroot ;Dh\2! sr
* @since 2006-2-2 z@bq*':~J
* @version 1.0 ++9?LH4S4
*/ DIsK+1
public class HeapSort implements SortUtil.Sort{ -DVoO2|Dv
u{| Q[hf[
/* (non-Javadoc) EC9bCd-z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #@pgB:~lB
*/ b#uNdq3
public void sort(int[] data) { n*gr(S
MaxHeap h=new MaxHeap(); RIC\f_Dv
h.init(data); 6XP>qI,AJ
for(int i=0;i h.remove(); "0*yD[2
System.arraycopy(h.queue,1,data,0,data.length); w!/\dqjv
} ^$FNu~|K
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private static class MaxHeap{ fnXYp !
<x!q!;
void init(int[] data){ (-}:'5|Yj
this.queue=new int[data.length+1]; GG0H3MSc
for(int i=0;i queue[++size]=data; s=S9y7i(R
fixUp(size); q?R^~r
} G3.*fSY$.<
} i2+r#Hw#5R
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private int size=0; .j et0w
M&QzsVH
private int[] queue; ?xa70Pb{;
eeVDU$*e=
public int get() { /"+CH\) E
return queue[1]; 8ln{!,j;
} QJ i5H
kC,=E9)O
public void remove() { |~K 5]
SortUtil.swap(queue,1,size--); /b1+ ^|_
fixDown(1); ]iU8n (5f
} )])nd"E
file://fixdown }}Zwdpo
private void fixDown(int k) { |?cL>]t
int j; =l)D$l
while ((j = k << 1) <= size) { *&vlfH
if (j < size %26amp;%26amp; queue[j] j++; 1 5heLnei
if (queue[k]>queue[j]) file://不用交换 ._E 6?
break; =,BDd$e
SortUtil.swap(queue,j,k); {})d}dEC
k = j; ]Cc3}+(s
} ]8n*fo2#
} .B+Bl/
private void fixUp(int k) { 12i<b
while (k > 1) { L[s`8u<_)z
int j = k >> 1; XnwVK
if (queue[j]>queue[k]) E"O6N.}.
break; AZ9;6Df
SortUtil.swap(queue,j,k); QkFB\v
k = j; =ea'G>;[H
} q"48U.}T
} 3 <A?
`K7UWtp
} 4-CGe
sck.2-f"
} LULRi#n
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SortUtil： +F?}<P_v
tP:ER
package org.rut.util.algorithm; lC=-1*WH
9bQD"%ha=d
import org.rut.util.algorithm.support.BubbleSort; <e?1&56
import org.rut.util.algorithm.support.HeapSort; 4<j7F4
import org.rut.util.algorithm.support.ImprovedMergeSort; *V`E)maU
import org.rut.util.algorithm.support.ImprovedQuickSort; erQQ_
import org.rut.util.algorithm.support.InsertSort; M=M~M$K
import org.rut.util.algorithm.support.MergeSort; zv-9z
import org.rut.util.algorithm.support.QuickSort; R?3N><oh*
import org.rut.util.algorithm.support.SelectionSort; c W1`[b
import org.rut.util.algorithm.support.ShellSort; j].=,M<dxE
S`Xx('!/|
/** LE|DMz|J
* @author treeroot Q\nIU7:bZ
* @since 2006-2-2 @CtnV|
* @version 1.0 p)qM{`]G\
*/ 1`sTGNo
public class SortUtil { ,bxGd!&{Q
public final static int INSERT = 1; 4Uk\hgT0
public final static int BUBBLE = 2; OcE,E6LD
public final static int SELECTION = 3; e#AmtheZR
public final static int SHELL = 4; XxYwBc'pc
public final static int QUICK = 5; R0#'t+7^
public final static int IMPROVED_QUICK = 6; \>\_OfY1W
public final static int MERGE = 7; Pil_zQ4
public final static int IMPROVED_MERGE = 8; !DM GAt\
public final static int HEAP = 9; ${5E
fB)S:f|
public static void sort(int[] data) { 7Y%Si5
sort(data, IMPROVED_QUICK); K0{ ,*>C
} n%ypxY0
private static String[] name={ >g;995tG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +MtxS l
}; 7<*,O&![|
JA$RY
private static Sort[] impl=new Sort[]{ S-[S?&c`
new InsertSort(), lt("yqBu
new BubbleSort(), g5;Ig
new SelectionSort(), kxLWk%V
new ShellSort(), `qV*R 2
new QuickSort(), FN<Sagj
new ImprovedQuickSort(), _]zH4o<p
new MergeSort(), Gn%"B6
new ImprovedMergeSort(), aF{1V\e
new HeapSort() =`k',V_
}; =p[a Cb i
".{'h
public static String toString(int algorithm){ oO^=%Mc(
return name[algorithm-1]; yf2P6b\
} tH(g;flO)
cl'wQ1<:
public static void sort(int[] data, int algorithm) { 'si{6t|
impl[algorithm-1].sort(data); [7\x(W-:@>
} Mt*V-`+\
[ <j4w
public static interface Sort { [NK&s:wMk
public void sort(int[] data); 0}"'A[xE
} } 4ZWAzH
qi['~((
public static void swap(int[] data, int i, int j) { &a+=@Z)kf
int temp = data; B"rO
data = data[j]; C^fn[plL
data[j] = temp; d[YG&.}+8j
} P @~)9W
} ]2c0?f*Y7