[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; ^OQ_iPPI
} ?tSY=DK\n
int i1=l; ;w6\r!O,
int i2=mid+1; u YH{4%
for(int cur=l;cur<=r;cur++){ $x2<D :
if(i1==mid+1) vF([mOZ
data[cur]=temp[i2++]; }'X}!_9w>
else if(i2>r) H"&N<"hw
data[cur]=temp[i1++]; [yVU p+
else if(temp[i1] data[cur]=temp[i1++]; <B``/EX^
else h2BD?y
data[cur]=temp[i2++]; Bo~wD|E2
} 4< H-ol
} [R Ch7FE23
c2F`S1Nu<
} P)}:lTe
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改进后的归并排序: { aB_t%`w
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package org.rut.util.algorithm.support; t(_XB|AKm
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import org.rut.util.algorithm.SortUtil; /aPq9B@
z&t6,0q`5
/** `86b
* @author treeroot @\q~OyV
* @since 2006-2-2 <]!IC]+
* @version 1.0 8vP d~te
*/ U>I#f
public class ImprovedMergeSort implements SortUtil.Sort { 9B%"7MVn
ipyO&v
private static final int THRESHOLD = 10; #pVk%5N
|6;.C1\,
/* |mM7P^I
* (non-Javadoc) y-Ol1R3:c#
* hZJ Nh,,w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lh,<q >t
*/ Jq; }q63:
public void sort(int[] data) { /y-P)3_
int[] temp=new int[data.length]; /JfXK$`
mergeSort(data,temp,0,data.length-1); k1cBMDSokO
} \Lc]6?,R
!nYAyjf
private void mergeSort(int[] data, int[] temp, int l, int r) { AzQ}}A;TSx
int i, j, k; k&?QeXW
int mid = (l + r) / 2; yT,UM^'
if (l == r) NCsUC
return; lA ,%'+-
if ((mid - l) >= THRESHOLD) xGH%4J\
mergeSort(data, temp, l, mid); 3NJH"amk
else 5&xvY.!27V
insertSort(data, l, mid - l + 1); 7u}r^+6_o
if ((r - mid) > THRESHOLD) XH*^#c
mergeSort(data, temp, mid + 1, r); 0GG;o[<
else x Dr^&rC
insertSort(data, mid + 1, r - mid); EgO4:8$h
o^NQ]BdH8
for (i = l; i <= mid; i++) { rms&U)?
temp = data; [AGm%o=)
} Xgl>kJy<#
for (j = 1; j <= r - mid; j++) { ofi']J{R
temp[r - j + 1] = data[j + mid]; g 08 `=g
} iy4JI,-W
int a = temp[l]; (;M"'.C
int b = temp[r]; cCeD3CuRA%
for (i = l, j = r, k = l; k <= r; k++) { ov+qYBuFw
if (a < b) { mR{0*<
data[k] = temp[i++]; k |Lm;g
a = temp; :,u+[0-S
} else { F 4hEfO3
data[k] = temp[j--]; p;H1,E:Re#
b = temp[j]; D\TL6"wo
} Op0 #9W
} ^:q(ksssY
} ht-6_]+ME
kOjq LA
/** qI"mW@G~H
* @param data &0lNj@/
* @param l un\^Wmbw
* @param i V]8fn MH
*/ {P3,jY^
private void insertSort(int[] data, int start, int len) { h'}5"m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :G`_IB\
} rm cy-}e
} 0O:TKgb&C.
} )I<.DN&
} Jw^+t)t
V:+}]"yJ,
堆排序： xtnB:3
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package org.rut.util.algorithm.support; *83+!DV|
7+fik0F
import org.rut.util.algorithm.SortUtil; ,yT4(cMBk?
jgYiuM3c\
/** $@NZ*m%?JQ
* @author treeroot N7;2BUIXJ
* @since 2006-2-2 *kIJv?%_}
* @version 1.0 C$hsR&
*/ <FJ#Hy+
public class HeapSort implements SortUtil.Sort{ gsR"d@!
vS0P]AUo
/* (non-Javadoc) byMO&Lb*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r9%W?fEBp
*/ _Nj;Ni2rD
public void sort(int[] data) { "K@os<
MaxHeap h=new MaxHeap(); v ;9s
h.init(data); W,<Vr2J[
for(int i=0;i h.remove(); m&x0,8
System.arraycopy(h.queue,1,data,0,data.length); C +IXP
} 'D-imLV<<
RDZq(rKc
private static class MaxHeap{ m ;KP
uaGg8
void init(int[] data){ Ff,M~zn
this.queue=new int[data.length+1]; BBx"{~
for(int i=0;i queue[++size]=data; s2$R2,
fixUp(size); OO$<Wgh
} s810714
} SUx0!_f*R
E8nqExQ
private int size=0; kz&)a>aA
Wt8 RC
private int[] queue; khIh<-s!
J3zb_!PPE
public int get() { JE j+>
return queue[1]; J+;.t&5R
} F3qi$3HM
!9!Ns(vUM
public void remove() { ecFI"g
SortUtil.swap(queue,1,size--); "au"\}
fixDown(1); z XvWo6
} z[';HJ0O;
file://fixdown @#V{@@3$
private void fixDown(int k) { 5P! ZJ3C
int j; m}XI?[!s
while ((j = k << 1) <= size) { XJlun l)(K
if (j < size %26amp;%26amp; queue[j] j++; Jd%#eD*k9
if (queue[k]>queue[j]) file://不用交换 kgQEg)A]!x
break; T#( s2
SortUtil.swap(queue,j,k); !98s[)B:
k = j; ~E!"YkIr
} eL(T
} X23TS`
private void fixUp(int k) { :?S2s Ne2
while (k > 1) { 2"mO"2d%
int j = k >> 1; qvt~wJf<
if (queue[j]>queue[k]) & =frt3
break; CEUR-LK0
SortUtil.swap(queue,j,k); W w8[d
k = j; N( /PJJ~
} & .#0jb1r
} a@ lK+t
2`lit@u&u
} hA"N&v~
o~}q@]]
} *R&g'y^d
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SortUtil： <1@_MYo
& IDF9B
package org.rut.util.algorithm; tf/ f-S
MLR3A s
import org.rut.util.algorithm.support.BubbleSort; sFGXW
import org.rut.util.algorithm.support.HeapSort; [A3hrSw
import org.rut.util.algorithm.support.ImprovedMergeSort; $<yb~z7J
import org.rut.util.algorithm.support.ImprovedQuickSort; auO^v;s
import org.rut.util.algorithm.support.InsertSort; Bf7RW[ -v
import org.rut.util.algorithm.support.MergeSort; /yI~(8bO
import org.rut.util.algorithm.support.QuickSort; k_^d7yH
import org.rut.util.algorithm.support.SelectionSort; MTF:mLJ
import org.rut.util.algorithm.support.ShellSort; 2x{3'^+l
>g F
/** $EtZ5?qS
* @author treeroot ;~@2YPj
* @since 2006-2-2 X-ml0 =M[
* @version 1.0 <oR Nd3d
*/ iWvgCm4
public class SortUtil { H,uOshR
public final static int INSERT = 1; O@ "6)/
public final static int BUBBLE = 2; jeJGxfii
public final static int SELECTION = 3; O<+C$J|
public final static int SHELL = 4; c XY!b=9
public final static int QUICK = 5; eLt6Hg)s`9
public final static int IMPROVED_QUICK = 6; 1LE8,Gm&
public final static int MERGE = 7; H8\N~>
public final static int IMPROVED_MERGE = 8; ckTnb
public final static int HEAP = 9; PM_q"}-
B0YY7od
public static void sort(int[] data) { Fc nR}TE
sort(data, IMPROVED_QUICK); JL*-L*|Zcl
} }q~A( u
private static String[] name={ Z|j8:Ohz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #<?j784
}; 7{b|+0W
:Z/ig%
private static Sort[] impl=new Sort[]{ pY:xxnE
new InsertSort(), bG5c~
new BubbleSort(), .t["kaA
new SelectionSort(), Gd'^vqo<
new ShellSort(), Dm5UQe
new QuickSort(), '[A>eC++
new ImprovedQuickSort(), mB!81%f%|
new MergeSort(), X/.|S57
new ImprovedMergeSort(), u]oS91
new HeapSort() gHm^@
}; Mk^o*L{H
|D^[]*cEH
public static String toString(int algorithm){ Ak1f*HGl|
return name[algorithm-1]; )JZfC&,
} #S1)n[
fCTjTlh
public static void sort(int[] data, int algorithm) { D}_\oE/n
impl[algorithm-1].sort(data); -Y+[`0$'
} Oo#wPT;1^(
#7g~Um%p
public static interface Sort { &'(:xjN
public void sort(int[] data); zL>nDnL 4
} 7gJ`G@y
l\(t~Q
public static void swap(int[] data, int i, int j) { _o`'b80;
int temp = data; "r|O /
data = data[j]; Et7AAV*8g
data[j] = temp; r_o2d8
} 5:AAqMa
} aoCyYnZD