[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; C[gy{40}
} 8V?O=3<a
int i1=l; HsO4C)/
int i2=mid+1; B/7c`V
for(int cur=l;cur<=r;cur++){ Cwl#(;@
if(i1==mid+1) 0& 54xP
data[cur]=temp[i2++]; w|7<y8#qC
else if(i2>r) jw]~g+x#$
data[cur]=temp[i1++]; l*rli[No
else if(temp[i1] data[cur]=temp[i1++]; uDbz`VpK
else 9v=5x[fE
data[cur]=temp[i2++]; hKj"Lb9]
} Z7lv|m&
} T_i]y4dg
_Gvn1"l
} |5^tp
1--_E,Su>
改进后的归并排序: x8+W9i0[1
v@(Y:\>
package org.rut.util.algorithm.support; LR|LP)I
gmd-$%"
import org.rut.util.algorithm.SortUtil; kWZ?86!
d ]R&mp|'
/** wGr5V!
* @author treeroot E]/` JI'%
* @since 2006-2-2 &;I=*B~kE$
* @version 1.0 4Hc+F(
*/ q$7SJ.pF
public class ImprovedMergeSort implements SortUtil.Sort { R9%Um6
(pJ-_w'G
private static final int THRESHOLD = 10; ))JbROBU,
~\<aj(m(|
/* XR3=Y0YDf
* (non-Javadoc) kqdF)Wa am
* kwF4I)6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;n0VF77>O
*/ h2<Y*j
public void sort(int[] data) { u2}zRC=
int[] temp=new int[data.length]; &]~Vft l
mergeSort(data,temp,0,data.length-1); H=,0p
} w_4/::K*
2B Dz \
private void mergeSort(int[] data, int[] temp, int l, int r) { 0<(F 8
int i, j, k; p}I,!~}
int mid = (l + r) / 2; b}s)3=X@q
if (l == r) {kVhht]X
return; V}_M\Y^^;
if ((mid - l) >= THRESHOLD) \-i5b
mergeSort(data, temp, l, mid); vy&q7EX<i
else 4AA3D!$
insertSort(data, l, mid - l + 1); KVQ|l,E, /
if ((r - mid) > THRESHOLD) XpS].P9
mergeSort(data, temp, mid + 1, r); !} ~K'1"
else pH!e<m
insertSort(data, mid + 1, r - mid); 8Evon&G59
" b?1Yc-
for (i = l; i <= mid; i++) { ` 9iB`<
temp = data; gK7bP'S8H
} St 4YNS.|
for (j = 1; j <= r - mid; j++) { kIR?r0_<G6
temp[r - j + 1] = data[j + mid]; *%6NuZ
} E3%:7MB
int a = temp[l]; SY&)?~C
int b = temp[r]; KPW2e2{4@
for (i = l, j = r, k = l; k <= r; k++) { j6@5"wx
if (a < b) { 0H;,~ WY
data[k] = temp[i++]; fiG/"/u
a = temp; gN./u
} else { _\mMgZu
data[k] = temp[j--]; %uA\Le
b = temp[j]; }fzv9$]$
} rsSE*(T t
} )}`3haG
} {6E&\
r92C^h0
/** @-9u;aL
* @param data HH`G/(a
* @param l JrZ"AId2
* @param i >U?U;i
*/ rwYlg:
private void insertSort(int[] data, int start, int len) { %UV'HcO/gp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BM6 J
} AiMD"7 )c
} E}&Z=+v}
} F^knlv'
} kWkAfzf4a
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堆排序： k#*tf:R
q].n1w[
package org.rut.util.algorithm.support; &tKr ?l
WcE{1&PXx
import org.rut.util.algorithm.SortUtil; L!fiW`>0G
5yC$G{yV
/** HZ>8@AVa\
* @author treeroot WrzyBG_
* @since 2006-2-2 i]sz*\P~
* @version 1.0 =[X..<bW9:
*/ Yr7%C
public class HeapSort implements SortUtil.Sort{ io8c[#"uU
f[}N
/* (non-Javadoc) n4* hQi+d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Av3qoH)[<
*/ $%*E)~
public void sort(int[] data) { eJh4hp;x
MaxHeap h=new MaxHeap(); }\p>h
h.init(data); 3)5Gzn
for(int i=0;i h.remove(); 6L`{oSX!
System.arraycopy(h.queue,1,data,0,data.length); Q $wa<`
} o'9K8q\1
aN\psg
private static class MaxHeap{ yW3X<
X[F<sxw
void init(int[] data){ XI>|"*-l
this.queue=new int[data.length+1]; aqa%B
for(int i=0;i queue[++size]=data; T!GX^nn*O
fixUp(size); Z33&FUU
} 1O<Gg<<,e
} 5)%bnLxn
GoVB1)
private int size=0; G'*_7HD
zP[_ccW@
private int[] queue; [8T
fa~u<m
public int get() { d~lB4
return queue[1]; BC/oh+FW3
} %FN3/iM
t6zc$0-j"
public void remove() { B5-G.Z
SortUtil.swap(queue,1,size--); \M@9#bd
fixDown(1); @ P[o
} N{lj"C]L
file://fixdown /hC[>t<
private void fixDown(int k) { jQrj3b.NC3
int j; ^\Bm5QkS
while ((j = k << 1) <= size) { ]}K\&ho2
if (j < size %26amp;%26amp; queue[j] j++; 5P?7xRA
if (queue[k]>queue[j]) file://不用交换 ]klP.&I/0
break; uU&,KEH
SortUtil.swap(queue,j,k); vXdz?
k = j; v^Vr^!3
} V !Cu%4
} ;=&D_jGf]
private void fixUp(int k) { X)-9u8
while (k > 1) { "K.XoG4|
int j = k >> 1; Nk~Xz
if (queue[j]>queue[k]) $Vu%4kq
break; ]e*Zx;6oi
SortUtil.swap(queue,j,k); 1KH]l336D"
k = j; RC[b+J,q
} OHz>B!`
} /zB;1%m-
76Drhh(
} tb%u<jY
uxbDRlOS
} |*~=w J_
!OM P]
SortUtil： .d\<}\zZ7J
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package org.rut.util.algorithm; OokBi 02b
buIy+
import org.rut.util.algorithm.support.BubbleSort; ER z@o_
import org.rut.util.algorithm.support.HeapSort; w"-'
import org.rut.util.algorithm.support.ImprovedMergeSort; q\PHA
import org.rut.util.algorithm.support.ImprovedQuickSort; DXbzl +R
import org.rut.util.algorithm.support.InsertSort; eSV_.uvsb
import org.rut.util.algorithm.support.MergeSort; [1I>Bc&o*
import org.rut.util.algorithm.support.QuickSort; q>$[<TsE&}
import org.rut.util.algorithm.support.SelectionSort; I'23$IzPA
import org.rut.util.algorithm.support.ShellSort; n@3(bl5{
XIv{jzgF
/** GCw<jHw
* @author treeroot 1 \#n{a3
* @since 2006-2-2 UfE41el:
* @version 1.0 f zu#!
*/ q&eUw<(F
public class SortUtil { 9u3~s<
public final static int INSERT = 1; EYe)d+E*
public final static int BUBBLE = 2; 2TR l@
public final static int SELECTION = 3; &4aY5y`8+f
public final static int SHELL = 4; FTB@70
public final static int QUICK = 5; w(lxq:>"
public final static int IMPROVED_QUICK = 6; gq$]jWtCD
public final static int MERGE = 7; 9J"Y
public final static int IMPROVED_MERGE = 8; r#Pkhut
public final static int HEAP = 9; 410WWR&4_
R~z@voM*<
public static void sort(int[] data) { m,zZe}oJ
sort(data, IMPROVED_QUICK); o_2mSD!
} }]-SAM
private static String[] name={ c$<7&{Pb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =r<0l=
}; Ri,8rf0u
owYSR?aG
private static Sort[] impl=new Sort[]{ Y0kDHG
new InsertSort(), oB3,"zY
new BubbleSort(), &hK5WP6whW
new SelectionSort(), 5kwDmJy
new ShellSort(), VrV* -J'
new QuickSort(), ^':Az6Z
new ImprovedQuickSort(), \M]w I
new MergeSort(), rcc.FS
new ImprovedMergeSort(), !PCw-&
new HeapSort() =~Ac=j!q
}; ?K<m.+4b*y
rUunf'w`e1
public static String toString(int algorithm){ qXHr[C"
return name[algorithm-1]; $,vZX u|Qw
} 8[\(*E}d!X
{J:ZM"GS
public static void sort(int[] data, int algorithm) { jg ~;s
impl[algorithm-1].sort(data); B3 mD0
} %cM2;a=2
By3/vb)M5
public static interface Sort { S9sFC!s1g
public void sort(int[] data); jni }om
} st;.Po[h
{FR#je
public static void swap(int[] data, int i, int j) { NN<kO#c+2
int temp = data; AJRfl%3
data = data[j]; TQx''$j\
data[j] = temp; .Gq)@{o>
} MC5M><5\
} (7nWv43