[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; |1<B(iB'{/
} >h9~ /
int i1=l; g<w1d{Td
int i2=mid+1; d;3f80Kd*
for(int cur=l;cur<=r;cur++){ ^"uD:f)
if(i1==mid+1) n"~K",~P
data[cur]=temp[i2++]; gId :IR
else if(i2>r) :a=]<_*x
data[cur]=temp[i1++]; Ir- 1@_1Q
else if(temp[i1] data[cur]=temp[i1++]; sP9{tk2K
else *Hv d
data[cur]=temp[i2++]; Pc+,iK>
} zQGj,EAM}
} plzwk>b_
Hg\H>Z
} )wEXCXr!
AGx(IK/_
改进后的归并排序: A~s6~
&u) qw}
package org.rut.util.algorithm.support; ZY6%%7?1
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import org.rut.util.algorithm.SortUtil; QdD@[
nAsc^Yh
/** F"tM?V.|
* @author treeroot >;s2V_d
* @since 2006-2-2 oChf&W 8u
* @version 1.0 2@&"*1(Xu
*/ 0'zjPE#
public class ImprovedMergeSort implements SortUtil.Sort { ~PN[ #e]
idS+&:'
private static final int THRESHOLD = 10; )Dcee@/7S
Ghe@m6|D
/* CWD $\KG
* (non-Javadoc) sI4 FgO
* )%: W;H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kWbY&]ZO
*/ (5RZLRn
public void sort(int[] data) { )R@Y$*fm
int[] temp=new int[data.length]; )1)&fN41i#
mergeSort(data,temp,0,data.length-1); IJ{VCzi
} *@YQr]~ ;
E /ycPqD
private void mergeSort(int[] data, int[] temp, int l, int r) { CF+:v(NL
int i, j, k; K$$%j"s
int mid = (l + r) / 2; @3I?T Q1
if (l == r) 4LJOT_
return; a=[|"J<M
if ((mid - l) >= THRESHOLD) 1u* (=!
mergeSort(data, temp, l, mid); X(]J\?n'
else 6fT^t!<i
insertSort(data, l, mid - l + 1); I(9+F
if ((r - mid) > THRESHOLD) Ds8x9v)^
mergeSort(data, temp, mid + 1, r); %VrMlG4hx
else 2T"[$iH!7
insertSort(data, mid + 1, r - mid); /DSy/p0%
RS7J~Q
for (i = l; i <= mid; i++) { Vl:M6d1
temp = data; (g tOYEqx
} MR* %lZpB
for (j = 1; j <= r - mid; j++) { (Q|Y*yI
temp[r - j + 1] = data[j + mid]; !U1V('
} J=#9eW
int a = temp[l]; ^$8WV&5q>
int b = temp[r]; tkHUX!Ow;
for (i = l, j = r, k = l; k <= r; k++) { 52*KRq o
if (a < b) { r"lh\C|
data[k] = temp[i++]; &{x`K4N
a = temp; u3PM 7z!~
} else { ZgzYXh2
data[k] = temp[j--]; Ak\"C4s
b = temp[j]; ZB,UQ~!Yr
} KeC&a=HL
} YgkQF0+
} ksqb& ux6
fp"GdkO#}i
/** R1:7]z0B
* @param data DEenvS`,P
* @param l >LFj@YW_)
* @param i Nw3IDy~T
*/ k%LsjN.S
private void insertSort(int[] data, int start, int len) { NB&zBJ#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qh wl
} 4 ..V
} 9kas]zQ%=P
} u%CJjy
} pf_`{2.\uO
\j vS`+
堆排序： 42 rIIJ1A
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package org.rut.util.algorithm.support; [\"<=lb`
gL wNHS
import org.rut.util.algorithm.SortUtil; .wuRT>4G)G
7"k\i=
/** I#CS;Yh95
* @author treeroot N*Xl0m(Q
* @since 2006-2-2 A)f/ww)Q
* @version 1.0 1h?:gOig
*/ A)TO<dl
public class HeapSort implements SortUtil.Sort{ E._[P/PB
fH_Xm :%
/* (non-Javadoc) I8:G:s:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'i8?]` T
*/ x1QL!MB
public void sort(int[] data) { Ua>.k|>0
MaxHeap h=new MaxHeap(); V5]\|?=
h.init(data); rK cr1VFy
for(int i=0;i h.remove(); zm^5WH
System.arraycopy(h.queue,1,data,0,data.length); z%/<|` 7
} Dl=vv9
vg[zRWh8
private static class MaxHeap{ O u{|o0
j(Tk6S
void init(int[] data){ 4_vJ_H-mO,
this.queue=new int[data.length+1]; ]iiB|xT
for(int i=0;i queue[++size]=data; wafws*b%
fixUp(size); `>{S?t<
} yTU'voE.|
} f.U.(
l65Qk2<YC
private int size=0; uulzJbV,K
)Z@hk]@?_[
private int[] queue; Th5}?j7
]\J(
public int get() { E&|EokSyN
return queue[1]; ?}U l(
} eLop}*k
.+CMm5T
public void remove() { >tV:QP]Y
SortUtil.swap(queue,1,size--); 78u=Jz6
fixDown(1); *(Us:*$W.
} U,^jN|v
file://fixdown 'J#uD|9)
private void fixDown(int k) { |>=\ VX17
int j; _zFJ]7Ym.)
while ((j = k << 1) <= size) { OMN|ea.O
if (j < size %26amp;%26amp; queue[j] j++; ~bX ) %jC
if (queue[k]>queue[j]) file://不用交换 ' ui`EL%
break; &ETPYf%#
SortUtil.swap(queue,j,k); 8'mm<BV;sT
k = j; ;5}y7#4C
} Kl+4A}Uo
} dY]iAJ
private void fixUp(int k) { b]5S9^=LI
while (k > 1) { '5SO3/{b
int j = k >> 1; %Z#[{yuFs
if (queue[j]>queue[k]) Ya,(J0l
break; ^NOy:>
SortUtil.swap(queue,j,k); =zKbvwe%X
k = j; F[U0TP@&*
} 29h_oNO
} fuA8jx
gd\b]L?>O
} m_>~e}2'A
T ^z Mm
} O6r.q&U
? 1b*9G%i
SortUtil： m?Dk(DJ
Xw9"wAj
package org.rut.util.algorithm; @NJJ
mi{ r7.e5I
import org.rut.util.algorithm.support.BubbleSort; JWs?az
import org.rut.util.algorithm.support.HeapSort; W|[k]A` 2
import org.rut.util.algorithm.support.ImprovedMergeSort; G X>T~i\f8
import org.rut.util.algorithm.support.ImprovedQuickSort; 3`Q>s;DjIU
import org.rut.util.algorithm.support.InsertSort; ),+u>Os&
import org.rut.util.algorithm.support.MergeSort; I'16-
import org.rut.util.algorithm.support.QuickSort; -`e`U%n
import org.rut.util.algorithm.support.SelectionSort; [$(/H;
import org.rut.util.algorithm.support.ShellSort; >CPoeIHK
Pr^p ^s
/** 3+# "4O
* @author treeroot p4{3H+y
* @since 2006-2-2 'O]Ja-
* @version 1.0 }=^Al;W
*/ {:d9q
public class SortUtil { o[CjRQY]P
public final static int INSERT = 1; I~I$/j]e`
public final static int BUBBLE = 2; ]%/a'[
public final static int SELECTION = 3; HA%r:Px
public final static int SHELL = 4; nXF|AeAco
public final static int QUICK = 5; z6Jfu:_N!
public final static int IMPROVED_QUICK = 6; H!ISQ8{V
public final static int MERGE = 7; (L6*#!Dt
public final static int IMPROVED_MERGE = 8; X~Vr}
public final static int HEAP = 9; $8,/[V A
'P?DZE
public static void sort(int[] data) { ='|HUxFi
sort(data, IMPROVED_QUICK); HxH=~B1"P
} s_N]$3'[E
private static String[] name={ h^6Yjy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2VNfnk
}; C:d$
]&/KAk
private static Sort[] impl=new Sort[]{ 1)f~OL8o
new InsertSort(), y[@<goT
new BubbleSort(), k/ ZuFTN
new SelectionSort(), yS:1F PA$_
new ShellSort(), 2Md'<.
new QuickSort(), IKV:J9
new ImprovedQuickSort(), ZIrJ"*QO=
new MergeSort(), A?sU[b6_
new ImprovedMergeSort(), PNMf5'@m
new HeapSort() x2gP, p-
}; a0ze7F<(
]tVXao
public static String toString(int algorithm){ RDu'N
return name[algorithm-1]; m}3POl/*j
} B>&eciY
.8%mi'0ud
public static void sort(int[] data, int algorithm) { Q35/Sp[;x
impl[algorithm-1].sort(data); }X`jhsqT
} \LS+.bp%
z~BrKdS
public static interface Sort { |E)IJj 3
public void sort(int[] data); 2<@27C5
} s GP}>w-JZ
1y5$
public static void swap(int[] data, int i, int j) { Soa5TM
int temp = data; /M "E5
data = data[j]; '{:Yg3K
data[j] = temp; k99ANW
} Uwqm?]
} _(8HK