[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; @6 uB78U4O
} k'{'6JR
int i1=l; .ml24SeC
int i2=mid+1; fEE[huG
for(int cur=l;cur<=r;cur++){ DcA{E8Y
if(i1==mid+1) R9nW5f Nf
data[cur]=temp[i2++]; -hw^3Af
else if(i2>r) }YWLXxb;
data[cur]=temp[i1++]; bmVksi2b
else if(temp[i1] data[cur]=temp[i1++]; ,\q9>cZ!
else nS)U+q-x&o
data[cur]=temp[i2++]; =.O8G=;DOA
} %719h>$
} -jdS8n4
HtB>#`'
} 0]=|3-n
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改进后的归并排序: K>X#,lE-
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package org.rut.util.algorithm.support; 13wO6tS k
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import org.rut.util.algorithm.SortUtil; __M(dN(^
+<7~yZ[Z8
/** u)PB@
* @author treeroot Gs;wx_k^
* @since 2006-2-2 m`gH5vQa
* @version 1.0 hAtf)
*/ b?eIFI&w^l
public class ImprovedMergeSort implements SortUtil.Sort { \,)('tUE
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private static final int THRESHOLD = 10; =B@+[b0Z
3:Q5dr+1_
/* :["iBrFp
* (non-Javadoc) F)_jW
* |l)SX\Qf`@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _SdO}AiG
*/ HZC^Q7]hy
public void sort(int[] data) { [E<NEl*
int[] temp=new int[data.length]; =V~pQbZ
mergeSort(data,temp,0,data.length-1); 6U5L>sQ
} 7p*PDoM6`
VA+ ?xk
private void mergeSort(int[] data, int[] temp, int l, int r) { 8&<C.nKP
int i, j, k; / r6^]grg
int mid = (l + r) / 2; _Y@vO
if (l == r) W5 ^eCYHoi
return; %^tKt
if ((mid - l) >= THRESHOLD) wb~BY
mergeSort(data, temp, l, mid); b>SG5EqU@
else !m8MyZ}%
insertSort(data, l, mid - l + 1); Vc0C@*fVM
if ((r - mid) > THRESHOLD) lWr=79
mergeSort(data, temp, mid + 1, r); ln.'}P
else {7swE(N
insertSort(data, mid + 1, r - mid); EYWRTh
y,'M3GGl
for (i = l; i <= mid; i++) { `L# pN5
temp = data; KBJ%$OQV
} 0Cd)w4C
for (j = 1; j <= r - mid; j++) { ?e( y/
temp[r - j + 1] = data[j + mid]; K",YAfJa
} &iR3]FNI
int a = temp[l]; vpnQs#8O
int b = temp[r]; dC+WII`V
for (i = l, j = r, k = l; k <= r; k++) { 8h"Val|qP
if (a < b) { zA/tHlKc
data[k] = temp[i++]; &zkuL
a = temp; %gUf
} else { HZ%2WM
data[k] = temp[j--]; -Uj)6PzGu
b = temp[j]; lz1RAp0R"
} "LZQ1P*ef$
} *-Y`7=^$
} 5B6twn~[
\%&BK.t
/** ybk~m
* @param data t<=Ru*p
* @param l zv[$N,
* @param i A#NJ8_
*/ _mSDz=!Z3
private void insertSort(int[] data, int start, int len) { /bm2v;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \tR](, /
} V+`gkWe/
} y,&'nk}
} HK}br!?
} 2S%[YR>>
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堆排序： <46>v<
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package org.rut.util.algorithm.support; mQL8ec_c
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import org.rut.util.algorithm.SortUtil; U'4j+vUc
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/** >}~\*Y\8@
* @author treeroot .M(')$\U
* @since 2006-2-2 >-S?rXO
* @version 1.0 /wAx#[c[
*/ Nk JOD3>U
public class HeapSort implements SortUtil.Sort{ o,qq*}=
P}"=67$
/* (non-Javadoc) hSAdD!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oVZI([O
*/ XotiKCk|Aq
public void sort(int[] data) { T'i^yd}*v
MaxHeap h=new MaxHeap(); 8Dy5g
h.init(data); B'NtG84
for(int i=0;i h.remove(); VrQgn9L
System.arraycopy(h.queue,1,data,0,data.length); xE>jlr?
} _PPZ!r(
da[=d*I.
private static class MaxHeap{ qStZW^lFeY
:zA/~/Wo
void init(int[] data){ F#b^l}
this.queue=new int[data.length+1]; PI G3kJ
for(int i=0;i queue[++size]=data; nm#ISueh
fixUp(size); y J|/^qs
} 1R-1#<a>&
} IvZ,|R?
7{z\^R^O
private int size=0; @n|Mr/PAj
-G'U\EXT
private int[] queue; UY5wef2sF
8'sT zB]
public int get() { }H5~@c$
return queue[1]; 7!qO*r
} xdLMy#U2
CJa`[;i0y
public void remove() { pH9xyN[:a
SortUtil.swap(queue,1,size--); isBtJ7\Sc
fixDown(1); Bm>>-nG;
} xF8U )j!
file://fixdown d/&W[jJ
private void fixDown(int k) { a^vTBJXo
int j; iY,FfuE
while ((j = k << 1) <= size) { APgjT';P^
if (j < size %26amp;%26amp; queue[j] j++; NZb}n`:
if (queue[k]>queue[j]) file://不用交换 "1P[D'HV4|
break; AONEUSxJ
SortUtil.swap(queue,j,k); : Iq
k = j; A4~-{.w=
} M&[bb $00j
} 8NZQTRdH
private void fixUp(int k) { J#'8]p3E
while (k > 1) { }AW"2<@
int j = k >> 1; Y+d+
if (queue[j]>queue[k]) mAM:Q*a'
break; 9}|x N8
SortUtil.swap(queue,j,k); 5FJ(x:k?z
k = j; eG_@WLxwD
} =?3b3PZn
} T)Y{>wT
88&M8T'AP
} Hk8lHja+\
,*kh{lJ
} 39qIoaHT
]5O]=^ u0
SortUtil： ^?V9
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package org.rut.util.algorithm; 6!Q,XHs
O0^?VW$y_
import org.rut.util.algorithm.support.BubbleSort; 41v#|%\w
import org.rut.util.algorithm.support.HeapSort; rD;R9b"J
import org.rut.util.algorithm.support.ImprovedMergeSort; C+L_f_6]
import org.rut.util.algorithm.support.ImprovedQuickSort; *t{^P*pc
import org.rut.util.algorithm.support.InsertSort; 5O%?J-Hp
import org.rut.util.algorithm.support.MergeSort; #b eLo J
import org.rut.util.algorithm.support.QuickSort; <dGph
import org.rut.util.algorithm.support.SelectionSort; OWys`2W
import org.rut.util.algorithm.support.ShellSort; 'NNfzh
yU"lJ>Eh}}
/** uXouN$&
* @author treeroot ge4QaK
* @since 2006-2-2 <nk9IAH
* @version 1.0 ;Rf@S$
*/ s'^sT=b
public class SortUtil { HfPu~P
public final static int INSERT = 1; ^]NFr*'!
public final static int BUBBLE = 2; Bwc_N.w?3
public final static int SELECTION = 3; _Rb>py
public final static int SHELL = 4; Xqy9D ZIn
public final static int QUICK = 5; G,}"}v:
public final static int IMPROVED_QUICK = 6; Y 8n*o3jM
public final static int MERGE = 7; 9i46u20
public final static int IMPROVED_MERGE = 8; Z8ds`KZM
public final static int HEAP = 9; x~JOg57up
F.{$HJ
public static void sort(int[] data) { msVi3`q~
sort(data, IMPROVED_QUICK); Qt\^h/zjG
} DJZ$M
private static String[] name={ sOO_J!bblP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Aw]kQ\P&
}; ES\=MO5a7
S}P rgw/
private static Sort[] impl=new Sort[]{ mb>8=hMg
new InsertSort(), | Rj"}SC
new BubbleSort(), )A$xt)}P!{
new SelectionSort(), \ZtKaEXnx
new ShellSort(), af'gk&%
new QuickSort(), w|1O-k`
new ImprovedQuickSort(), Mi}.
new MergeSort(), Bm5\*Xd1(
new ImprovedMergeSort(), 4-?zW
new HeapSort() ^kK% 8 u
}; OH13@k
fXe$Ug|5a
public static String toString(int algorithm){ #}lWM%9Dy
return name[algorithm-1]; <Gna}ALkg
} j}O7fLRu
Gl%N}8Cim
public static void sort(int[] data, int algorithm) { twox.@"U
impl[algorithm-1].sort(data); f@ILC=c<
} ,u=+%6b)A
6Nws>(Ij
public static interface Sort { 7]_zWx,r
public void sort(int[] data); "r~/E|Da<
} ffMk.SqI
F/cA tT.M?
public static void swap(int[] data, int i, int j) { -wr_x<7
int temp = data; g`w46X
data = data[j]; iwy;9x
data[j] = temp; [a_o3
} eQwvp`@"
} $)eS Gslz