[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; 13}=;4O
} ~g;(`g
int i1=l; #:"\6s
int i2=mid+1; \I/l6H>o3
for(int cur=l;cur<=r;cur++){ i/y+kL
if(i1==mid+1) a^)7&|$ E
data[cur]=temp[i2++]; eOZA2
else if(i2>r) \$yI'q
data[cur]=temp[i1++]; 7: J6 F
else if(temp[i1] data[cur]=temp[i1++]; 23U9+
else BYhPOg[
data[cur]=temp[i2++]; $*MjNj2
} /7h}_zs6
} n'ZlIh
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} &pZ]F=.r+
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改进后的归并排序: U@BVVH?,o
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package org.rut.util.algorithm.support; gA`/t e
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import org.rut.util.algorithm.SortUtil; Ud*.[GRD~
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/** $_S^Aw?
* @author treeroot 4Qz
* @since 2006-2-2 ~*LH[l>K
* @version 1.0 R 7xV{o
*/ lh(A=hn"n
public class ImprovedMergeSort implements SortUtil.Sort { 5u~Ik c~
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private static final int THRESHOLD = 10; P+%O]v1 Ob
9cQKXh:R.
/* x1|5q/I
* (non-Javadoc) oQjh?vm
* pn{.oXomf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $qP9EZ]JC
*/ s,]6Lri`\
public void sort(int[] data) { 6$%]p1"!K
int[] temp=new int[data.length]; jQ%}e"
mergeSort(data,temp,0,data.length-1); FnvN 4h{S
} .: 87B=
(xG#D;M0
private void mergeSort(int[] data, int[] temp, int l, int r) { w^A8ZT0^7
int i, j, k; |jEKUTv,G
int mid = (l + r) / 2; yXg783B|v
if (l == r) yJ/m21f
return; YV.*8'*
if ((mid - l) >= THRESHOLD) ;}.jRmnJ
mergeSort(data, temp, l, mid); !}l)okQH<#
else ",#rI+ el
insertSort(data, l, mid - l + 1); wZE[we^Q"
if ((r - mid) > THRESHOLD) RLw=y{%p
mergeSort(data, temp, mid + 1, r); D<5gdIw
else /UN%P2>^1
insertSort(data, mid + 1, r - mid); '/z.\S
sN5x\9U
for (i = l; i <= mid; i++) { NV36Q^Am[
temp = data; HTQ.kV
} eq(|%]a=
for (j = 1; j <= r - mid; j++) { |>j=#2
temp[r - j + 1] = data[j + mid]; 4{}u PbS
} NO`LSF
int a = temp[l]; '?_I-="Mr
int b = temp[r]; AY[7yPP
for (i = l, j = r, k = l; k <= r; k++) { [9'5+RXw3
if (a < b) { Dr7,>Yx
data[k] = temp[i++]; v;JY;Uh|
a = temp; m-, '
} else { Z!wDh_
data[k] = temp[j--]; ##}a0\x|
b = temp[j]; d0MX4bhZ
} IR5 S-vO
} $daI++v`
} KD-0NO=oL
i:qc2#O:J
/** BL]!j#''KE
* @param data yoGE#+|7^
* @param l vQc>jmS+n
* @param i ]9R?2{"K
*/ K~x G+Kh
private void insertSort(int[] data, int start, int len) { 5c'rnMW4+p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QTcngv[
} R?Iv<(I
} $v-lG(
} &fiDmUxj
} 4y>G6TD^
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堆排序： B,e@v2jO|
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package org.rut.util.algorithm.support; SY>N-fW\H:
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import org.rut.util.algorithm.SortUtil; 4>0xS-
57K1e~^
/** CSt6}_c!
* @author treeroot 1V FAfv%}
* @since 2006-2-2 m4>v S
* @version 1.0 _$MoMg{uJH
*/ + #S]uC
public class HeapSort implements SortUtil.Sort{ Kqhj=B
ZZ[5Z=te?
/* (non-Javadoc) <%qbU-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9#O"^.Z !
*/ "%,zB_ng\<
public void sort(int[] data) { b:Rl }"a
MaxHeap h=new MaxHeap(); %#/7Tl:
h.init(data); nzhQ\'TC
for(int i=0;i h.remove(); rf1-E57#
System.arraycopy(h.queue,1,data,0,data.length); i]8zZRe
} yK{;72
p1J%=
private static class MaxHeap{ J[VQ6fD%
|\~cjPX(
void init(int[] data){ P/M*XUG.
this.queue=new int[data.length+1]; Bi?.G7>
for(int i=0;i queue[++size]=data; _4[kg)#+
fixUp(size); Vi5RkUY]
} 8$?a?7,>|
} N{|N_}X`Y
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private int size=0; VdVca1Z
^hY<avi6s
private int[] queue; u'Mq^8
+]5JXt^
public int get() { )JeiTh^
return queue[1]; AHn^^'&x[
} s)~Q@ze2
_F,@mQ$!
public void remove() { 7F)HAbIS
SortUtil.swap(queue,1,size--); h %MPppCEa
fixDown(1); ?>4^e:
} .$99/2[90
file://fixdown !. q*bY
private void fixDown(int k) { s7a\L=#p(
int j; DX4 95<6*
while ((j = k << 1) <= size) { =1`
if (j < size %26amp;%26amp; queue[j] j++; k9yA#
if (queue[k]>queue[j]) file://不用交换 O?8G
break; 47ir QK*
SortUtil.swap(queue,j,k); eR8h4M~O
k = j; Q'$aFl'NR
} zzq/%jki
} ?w3f;v
private void fixUp(int k) { z'fGHiX7.0
while (k > 1) { t?YGGu^
int j = k >> 1; olK%TM[Y
if (queue[j]>queue[k]) .hETqE`E
break; 3<'SnP3mY
SortUtil.swap(queue,j,k); KY2xKco
k = j; '=%vf
} |_!xA/_U'T
} )|Y"^K%Jm
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} ==UH)o`?8
XXxX;xz$
} 9-}&znLZe
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SortUtil： *k=Pk
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package org.rut.util.algorithm; ]%shs
3&x_%R
import org.rut.util.algorithm.support.BubbleSort; @kI^6(.
import org.rut.util.algorithm.support.HeapSort; Jw;J$ u!d
import org.rut.util.algorithm.support.ImprovedMergeSort; i1|-
import org.rut.util.algorithm.support.ImprovedQuickSort; ffuV$#
import org.rut.util.algorithm.support.InsertSort; lEQn2+
import org.rut.util.algorithm.support.MergeSort; V1#/+~
import org.rut.util.algorithm.support.QuickSort; t=A| K
import org.rut.util.algorithm.support.SelectionSort; Wc-P= J*m
import org.rut.util.algorithm.support.ShellSort; mP3:Fc_G
bLaD1rnGi
/** l3l[jDa,2
* @author treeroot [dOPOA/d
* @since 2006-2-2 F4">go
* @version 1.0 ]2K>#sn-]
*/ nCXIWLw
public class SortUtil { 2 B5kpmH:
public final static int INSERT = 1; @f{)]I +f
public final static int BUBBLE = 2; SGjaH8z
public final static int SELECTION = 3; -pa.-@
public final static int SHELL = 4; w7w$z_P
public final static int QUICK = 5; I:AlM?
public final static int IMPROVED_QUICK = 6; NWX~@Rg
public final static int MERGE = 7; s)xfTr_$
public final static int IMPROVED_MERGE = 8; cZ^$!0
public final static int HEAP = 9; +w GE
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public static void sort(int[] data) { vEn12s(lj
sort(data, IMPROVED_QUICK); 3lA<{m;V
} k{"~G#GwP
private static String[] name={ ZNG.W0{p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |Q.?<T:wt=
}; /$I&D}uR`
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private static Sort[] impl=new Sort[]{ ,ulTZV
new InsertSort(), Xo{Ce%L
new BubbleSort(), 4?72TBl]
new SelectionSort(), CF =#?+x
new ShellSort(), N#]f?6*R
new QuickSort(), <NT/+>:2
new ImprovedQuickSort(), _xUiHX<
new MergeSort(), >N+e c_D^
new ImprovedMergeSort(), Y5PIR9-
new HeapSort() zS|%+er~zO
}; !=q {1\#
%o+bO}/9
public static String toString(int algorithm){ _Ndy;MQ
return name[algorithm-1]; w#XE!8`
} 49HtI9@
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public static void sort(int[] data, int algorithm) { K& 2p<\2
impl[algorithm-1].sort(data); ruF+X)
} <(#cPV@j
b\]"r x (
public static interface Sort { E(]yjZ/
public void sort(int[] data); IO]Oo3
} |w /txn8G|
*~2jP;$
public static void swap(int[] data, int i, int j) { iT9cw`A^%
int temp = data; bLSI\
data = data[j]; ?aO%\<b
data[j] = temp; _lyP7$[: c
} %aL>n=$
} My_fm?n