[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; yxv]G6
} "^?|=sQ
int i1=l; +-8u09-F
int i2=mid+1; gN"Abc
for(int cur=l;cur<=r;cur++){ `2}H$D
if(i1==mid+1) s^O>PEX&<I
data[cur]=temp[i2++]; E<=h6Ha
else if(i2>r) i qLNX)
data[cur]=temp[i1++]; 1E3'H7k\t
else if(temp[i1] data[cur]=temp[i1++]; snU $Na3
else & QO9/!
data[cur]=temp[i2++]; ,UOAGu<_gb
} sT&O%(
} 8M9LY9C
x[%z \
} aX`@WXK
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改进后的归并排序: 2VSs#z!
/m>%=_nz
package org.rut.util.algorithm.support; !\e&7sV~Q
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import org.rut.util.algorithm.SortUtil; \TchRSe
}vzZWe
/** v-^7oai
* @author treeroot Gvo|uB#
* @since 2006-2-2 D)0pm?*5A
* @version 1.0 IvJ;9d
*/ 8|9JJ<G7
public class ImprovedMergeSort implements SortUtil.Sort { c{X>i>l>
Ojea~Y]Sr
private static final int THRESHOLD = 10; |[%CFm}+?
e G8Zn<:s
/* RDFOUqS
* (non-Javadoc) X9:4oMux7
* g7>p,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pxj}%LH
*/ s#f6qj
public void sort(int[] data) { 7*{9 2_M
int[] temp=new int[data.length]; H2EKr#(
mergeSort(data,temp,0,data.length-1); c5KJ_Nfi
} o>3g<-ul
+A3Q$1F
private void mergeSort(int[] data, int[] temp, int l, int r) { [xaglZ9HNo
int i, j, k; l~cT]Ep
int mid = (l + r) / 2; ]t4 9Efw
if (l == r) u<}PcI.
return; ux8:
if ((mid - l) >= THRESHOLD) D7'P^*4_B
mergeSort(data, temp, l, mid); *ud"?{)Z
else lQt&K1m
insertSort(data, l, mid - l + 1); jg,oGtRz
if ((r - mid) > THRESHOLD) dV~yIxD}C*
mergeSort(data, temp, mid + 1, r); T[$! ^WT
else $s[DT!8N
insertSort(data, mid + 1, r - mid); #zRT
,F4_ps?(
for (i = l; i <= mid; i++) { qa|"kRCO
temp = data; VW," dmC
} 7mUpn:U
for (j = 1; j <= r - mid; j++) { ZD)pdNX
temp[r - j + 1] = data[j + mid]; /Dh[lgF0C
} n_8wYiBs(
int a = temp[l]; $ N7J:Q
int b = temp[r]; rSGt`#E-s.
for (i = l, j = r, k = l; k <= r; k++) { GQU9UXe
if (a < b) { /.?m9O^ F
data[k] = temp[i++]; DA0{s
a = temp; OJ2O?Te8
} else { K5oVB,z)
data[k] = temp[j--]; FN-j@
b = temp[j]; ]GSs{'UhB
} !'ylh8}
} Ru1I,QvCj"
} U}r^M( s!
g{]C@,W
/** uU7s4oJ|
* @param data h`1{tu
* @param l j|WuOZm\0
* @param i |fQl0hL
*/ CB76
private void insertSort(int[] data, int start, int len) { Oyfc!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }!^/<|$=
} 9/La_:K
} 7<'4WHi;@s
} 3]*_*<D
} 3`W=rIMli
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堆排序： ;k<n}shD
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package org.rut.util.algorithm.support; <G5d{rKZ
. q=sC?D
import org.rut.util.algorithm.SortUtil; /1h 0l;
!jV}sp<Xp
/** RsY7F;
* @author treeroot AbWnDqv
* @since 2006-2-2 Pf?*bI
* @version 1.0 `L-GI{EJ
*/ P[l?
public class HeapSort implements SortUtil.Sort{ 6$d3Ap@Gl
]A;{D~X^w
/* (non-Javadoc) ("UzMr,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o0f{ePZ=
*/ G^Z SQ!
public void sort(int[] data) { ZTq"SQ>ym
MaxHeap h=new MaxHeap(); c4T8eTKU
h.init(data); (x.O]8GKP
for(int i=0;i h.remove(); (A6-9g>
System.arraycopy(h.queue,1,data,0,data.length); e``X6=rcG
} 4h|48</
]3+xJz~=
private static class MaxHeap{ j'z}m+_?
N*k`'T
void init(int[] data){ GsYi/Z
this.queue=new int[data.length+1]; ?5%0zMC
for(int i=0;i queue[++size]=data; oZ)\Ya=
fixUp(size); XT n`$}nz
} v=(L>gg
} UuNcBzB2d
:HDl-8]Lw
private int size=0; Nb))_+/
LI>tN R~
private int[] queue; ~S\Ee 2e>
*?k~n9n5U
public int get() { uC_&?
return queue[1]; oGK 1D
} JN9 W:X.
7TTU&7l~
public void remove() { CC(At.dd
SortUtil.swap(queue,1,size--); xB1Oh+@i
fixDown(1); _x.!, g{
} [OH9/"
file://fixdown t)yWQV
private void fixDown(int k) { 1>JUI5 {
int j; d+5KHfkK
while ((j = k << 1) <= size) { !y8/El
if (j < size %26amp;%26amp; queue[j] j++; l?+67cQLA
if (queue[k]>queue[j]) file://不用交换 XJ3 5Z+M
break; De^GWO.?bT
SortUtil.swap(queue,j,k); kWv)+
k = j; yq3i=RB(
} [V\0P,l
} ls(lL\
private void fixUp(int k) { ~*Fbs! ;,
while (k > 1) { CS:"F) at
int j = k >> 1; |@J:A!
if (queue[j]>queue[k]) RHV&m()Q
break; {b|:q>Be8
SortUtil.swap(queue,j,k); MEOVw[hO
k = j; [")3c)OH|
} `|p3@e
} kIHfLwh9N
B&l5yI b
} L'1p]Z"
QEl:>HG
} IF<?TYy=3B
D[.;-4"_
SortUtil： {Z>OAR#
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package org.rut.util.algorithm; 8 |2QJ
mL!)(Bb
import org.rut.util.algorithm.support.BubbleSort; Q4gsOxP
import org.rut.util.algorithm.support.HeapSort; +?xW%omy
import org.rut.util.algorithm.support.ImprovedMergeSort; ~ccwu
import org.rut.util.algorithm.support.ImprovedQuickSort; gm**9]k^{
import org.rut.util.algorithm.support.InsertSort; oW:p6d
import org.rut.util.algorithm.support.MergeSort; L-7?:
import org.rut.util.algorithm.support.QuickSort; )qGw!^8
import org.rut.util.algorithm.support.SelectionSort; 67/&AiS?
import org.rut.util.algorithm.support.ShellSort; <&n\)R4C1
,a N8`M
/** ;&|MNN^
* @author treeroot gZ!vRO<%
* @since 2006-2-2 d" T">Og)
* @version 1.0 lyBae?%&
*/ Q@]QPpe
public class SortUtil { `0@onDQVc=
public final static int INSERT = 1; /8Sg<
public final static int BUBBLE = 2; fc'NU(70c
public final static int SELECTION = 3; faqOGAb
public final static int SHELL = 4; Z.a`S~U
public final static int QUICK = 5; A}(&At%n4
public final static int IMPROVED_QUICK = 6; \KlOj%s
public final static int MERGE = 7; d ] J5c
public final static int IMPROVED_MERGE = 8; y{>d&M|
public final static int HEAP = 9; 5iE-$,7#L
&|;XLRHP}
public static void sort(int[] data) { 3h:"-{MW.
sort(data, IMPROVED_QUICK); `lAe2l^
} |sf&t
private static String[] name={ c/fU0cA@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9,7IsT8
}; ;^waUJ\Z
3)jFv7LAU
private static Sort[] impl=new Sort[]{ w8!S;~xKI
new InsertSort(), `|Aj3a3sND
new BubbleSort(), ))y`q@
new SelectionSort(), [O) Q\|k
new ShellSort(), 9M3XHj
new QuickSort(), F iZe4{(p
new ImprovedQuickSort(), -YF]k}|
new MergeSort(), ,>6s~'
new ImprovedMergeSort(), &xKln1z'
new HeapSort() rJ2yi6TB\
}; \'z&7;px
*v+xKy#M
public static String toString(int algorithm){ lTl-<E;
return name[algorithm-1]; Czj]jA(0f
} fq-zgqF<
K-%x]Fp=
public static void sort(int[] data, int algorithm) { Ns?8N":
impl[algorithm-1].sort(data); ~b.C[s
} {q=(x]C
Wn61;kV_)
public static interface Sort { C&Nga `J
public void sort(int[] data); OEz'&))J
} (9!$p|d*
A*;I}F
public static void swap(int[] data, int i, int j) { ya[][!.G
int temp = data; MHh>~Y(h
data = data[j]; ]njObU)[zr
data[j] = temp; H7&>cM
} 2=P.$Kx
} jNKu5"HB