[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; jL$X3QS:
} Sm5"Q
int i1=l; yvvR%]!.
int i2=mid+1; Y._AzJ&B[
for(int cur=l;cur<=r;cur++){ 8%Lg)hvl
if(i1==mid+1) [u:_Jqf-
data[cur]=temp[i2++]; 3u<2~!sR
else if(i2>r) tA.C"
data[cur]=temp[i1++]; {`> x"Y5
else if(temp[i1] data[cur]=temp[i1++]; Y*f<\z(4
else WYL.J5O
data[cur]=temp[i2++]; :08UeEy
} "mA/:8`Q
} 9Wn0YIc
" B1' K8
} aHw VoT
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改进后的归并排序: 8z&9
04:Dbt~=?p
package org.rut.util.algorithm.support; >e%Po,Fg$
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import org.rut.util.algorithm.SortUtil; YeVhWPn@
p[Es4S}N
/** (_2eiE71
* @author treeroot _C?K;-v}
* @since 2006-2-2 [Pay<]c6g
* @version 1.0 (,>`\\
*/ %?seX+ne
public class ImprovedMergeSort implements SortUtil.Sort { SWt"QqBU
%{Gqhb=u\
private static final int THRESHOLD = 10; 4(NI-|q0
w}iflAnjq
/* ocvBKsfhE`
* (non-Javadoc) @)}U\=
* `#hy'S:e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1EN5ZN,
*/ KE_Ze\P
public void sort(int[] data) { .*,ZcO
int[] temp=new int[data.length]; Z'E@sc 9
mergeSort(data,temp,0,data.length-1); ^,3 >}PU
} <mxUgU
=o {`vv
private void mergeSort(int[] data, int[] temp, int l, int r) { 2 UgjH
int i, j, k; -M4#dHR_!
int mid = (l + r) / 2; /cg!Ap5
if (l == r) ;-3M
return; 2:]Sy4K{
if ((mid - l) >= THRESHOLD) C9fJLCufC
mergeSort(data, temp, l, mid); +CACs7tV
else W{%M+a[#l
insertSort(data, l, mid - l + 1); *m;L.r`5[
if ((r - mid) > THRESHOLD) c;WS !.
mergeSort(data, temp, mid + 1, r); :sf;Fq
else .p&M@h w
insertSort(data, mid + 1, r - mid); 2iUF%>
%V$^CWOy
for (i = l; i <= mid; i++) { zw0p}
temp = data; _*+M'3&=
} TnC'<zm9!
for (j = 1; j <= r - mid; j++) { @8 pRIS"V
temp[r - j + 1] = data[j + mid]; =Ij;I~
} Zy<0'k%U
int a = temp[l]; $wBUu
int b = temp[r]; @?t)UE
for (i = l, j = r, k = l; k <= r; k++) { }\9qN!ol
if (a < b) { KMZ% 1=a
data[k] = temp[i++]; 5EU3BVu&u
a = temp; 6K,AQ.=V2
} else { ;HW@ZI
data[k] = temp[j--]; :5dq<>~
b = temp[j]; C 9DRVkjj
} !$O +M#
} $(GXlhA
} {3l]/X3
>BiJ/[9
/** m49)cK?
* @param data LEY$St
* @param l $:>K-4X\}
* @param i Eg ;r]?|6
*/ FN G]
private void insertSort(int[] data, int start, int len) { XXO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {`{U\w5Af
} |TkO'QN
} ;XANITV
} Qv#]T,
} zh7NXTzyf
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堆排序： `Os@/S
orJN#0v4
package org.rut.util.algorithm.support; tX)^$3A
: xW.(^(d
import org.rut.util.algorithm.SortUtil; |SCO9,Fs
QO~!S_FRH
/** y%f'7YZ4
* @author treeroot ih~ R?W
* @since 2006-2-2 :W^ k3/t
* @version 1.0 Y'0H2B8
*/ }qxwNmx
public class HeapSort implements SortUtil.Sort{ ',~,hJ0
uvi+#4~G
/* (non-Javadoc) M/T ll]\|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xO{yr[x"L
*/ YB*I'm3q
public void sort(int[] data) { mSr(PIH{\
MaxHeap h=new MaxHeap(); HZKqGkE
h.init(data); x:4:G(
for(int i=0;i h.remove(); DY1UP(y
System.arraycopy(h.queue,1,data,0,data.length); kocgPO5
} T'!7jgk{:
>We4F2?
private static class MaxHeap{ {%gMA?b|"
kIrb;bZ+l
void init(int[] data){ ?cF`T/z]"
this.queue=new int[data.length+1]; b"iPuN!p
for(int i=0;i queue[++size]=data; b*(74>XY
fixUp(size); QY|Rz(;m
} dg-nv]7
} ~lib~Y'-
hv (>9N
private int size=0; ozB2L\D7
/-s-W<S[
private int[] queue; *3 8 u ~n
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public int get() { stQRl_('
return queue[1]; mBN+c9n/
} UB^OMB-W.m
l$/.B=]
public void remove() { RqB8g
SortUtil.swap(queue,1,size--); *!NxtB!LC
fixDown(1); @S9^~W3G3
} 5v5)vv.kd
file://fixdown >UNx<=ry
private void fixDown(int k) { l]R=I2t
int j; rel_Z..~
while ((j = k << 1) <= size) { uHeKttR-
if (j < size %26amp;%26amp; queue[j] j++; ~ kwS`
if (queue[k]>queue[j]) file://不用交换 =hY9lxW
break; ANWfRtiU#
SortUtil.swap(queue,j,k); O#MaZ.=
k = j; z=/&tRe W
} D,\hRQ
} FRhHp(0}5
private void fixUp(int k) { -kzp>=
while (k > 1) { q{Ao j
int j = k >> 1; WA((>Daf]
if (queue[j]>queue[k]) T{:8,CiW
break; V!\'7-[R
SortUtil.swap(queue,j,k); 4v.{C"M
k = j; (h"-#q8$
} "*<)pnJ
} WeZ?L|&%w0
[,L>5:T
} @)XR
;oCSKY4
} m`BE{%
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SortUtil： =O%'qUj`q
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package org.rut.util.algorithm; ]w0_!Z&
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import org.rut.util.algorithm.support.BubbleSort; !?)aZ |r
import org.rut.util.algorithm.support.HeapSort; /%1-tGh
import org.rut.util.algorithm.support.ImprovedMergeSort; `*WzHDv5p
import org.rut.util.algorithm.support.ImprovedQuickSort; j-#h^3l1?
import org.rut.util.algorithm.support.InsertSort; ;;S9kNp^v
import org.rut.util.algorithm.support.MergeSort; &'k:?@J[
import org.rut.util.algorithm.support.QuickSort; LNcoTdv}k
import org.rut.util.algorithm.support.SelectionSort; s2`}~
import org.rut.util.algorithm.support.ShellSort; \ [bJ@f*."
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/** Y0yu,
* @author treeroot 3S .2
* @since 2006-2-2 NvvD~Bb
* @version 1.0 (ys<{Y-;
*/ }Te+Rv7{E
public class SortUtil { dTWcn7C
public final static int INSERT = 1; ;OC{B}.vH
public final static int BUBBLE = 2; (%'`t(<
public final static int SELECTION = 3; %GP`H/H(
public final static int SHELL = 4; .qLXjU
public final static int QUICK = 5; 0a9[}g1=#
public final static int IMPROVED_QUICK = 6; BoXPX2:
public final static int MERGE = 7; U8{^-#(Uz
public final static int IMPROVED_MERGE = 8; <nK@+4EH"o
public final static int HEAP = 9; s`pdy$
11Uu5e!.
public static void sort(int[] data) { ?BbEQr
sort(data, IMPROVED_QUICK); q,OCA\
} A8k$.E
private static String[] name={ [ {HTGz@(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >QPCYo<E
}; {].]`#4Jx
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private static Sort[] impl=new Sort[]{ =@&>r5W1
new InsertSort(), VbNN1'a-
new BubbleSort(), b!`6s
new SelectionSort(), n<F3&2w
new ShellSort(), 3#aLCpVla
new QuickSort(), JxKd
new ImprovedQuickSort(), 4sfq,shRq
new MergeSort(), hu7oJ H
new ImprovedMergeSort(), flz7{W
new HeapSort() t3*.Bm:^
}; z@~mu
ulk/I-y
public static String toString(int algorithm){ C+_UIx]A
return name[algorithm-1]; CYsLyk
} uL:NWgN
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public static void sort(int[] data, int algorithm) { @i#=1)Ze
impl[algorithm-1].sort(data); -al
} 9yu#G7
-~*kAh
public static interface Sort { |QQ(1#d
public void sort(int[] data); fJ=(oF=
} - ^Y\'y2
- /cf3
public static void swap(int[] data, int i, int j) { W}|k!_/
int temp = data; |h&okR+_,
data = data[j]; a/rQ@c>
data[j] = temp; l\2"u M#7
} [#AI!-
} gt=@v())