[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; i{m!v6j:
} HL&HY)W1gf
int i1=l; tTBDb
int i2=mid+1; e_e\Ie/pDc
for(int cur=l;cur<=r;cur++){ .;g kV-]
if(i1==mid+1) q{`1[R
data[cur]=temp[i2++]; oi|N8a2R
else if(i2>r) O)`L( x
data[cur]=temp[i1++]; 7SS#V
else if(temp[i1] data[cur]=temp[i1++]; A:ts_*
else 8Azh&c
data[cur]=temp[i2++]; QL8C!&=
} k6M D3c
} mDK*LL5]W
1q(Qr h
} .^*;hZ~4%
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改进后的归并排序: YIwa =^
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package org.rut.util.algorithm.support; >=97~a+.
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import org.rut.util.algorithm.SortUtil; ( 0/M?YQF
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/** lv=q( &
* @author treeroot AuK$KGCI=
* @since 2006-2-2 Hmr f\(x
* @version 1.0 R_B0CM<!
*/ .iy>N/u
public class ImprovedMergeSort implements SortUtil.Sort { ]fzXrN_
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private static final int THRESHOLD = 10; hy~[7:/<I&
g,]o+nT
/* %:'G={G`QH
* (non-Javadoc) Xgd-^
* -_nQn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bk\Y v0
*/ Wz.iDRFl
public void sort(int[] data) { p#jAEY p
int[] temp=new int[data.length]; we[+6Z6J
mergeSort(data,temp,0,data.length-1); UH-873AK
} ,V,mz?d^9
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private void mergeSort(int[] data, int[] temp, int l, int r) { :0:Tl/))
int i, j, k; i<F7/p "-
int mid = (l + r) / 2; lND2Kb
if (l == r) !DOyOTR&3
return; by'KJxl[
if ((mid - l) >= THRESHOLD) ^Zz^h@+
mergeSort(data, temp, l, mid); i*/i"W<
else KGM__ZO.
insertSort(data, l, mid - l + 1); 1W'Ai"DLw
if ((r - mid) > THRESHOLD) %?+vtX
mergeSort(data, temp, mid + 1, r); T='uqKW\
else z*h:Nt%.
insertSort(data, mid + 1, r - mid); '>t&fzD0
V5(_7b#z``
for (i = l; i <= mid; i++) { Lq5xp<
temp = data; `sqr>QD
} uKAI->"
for (j = 1; j <= r - mid; j++) { r|UJJ9i
temp[r - j + 1] = data[j + mid]; =_#b .8K
} $,@}%NlHc
int a = temp[l]; ]uox ^HC
int b = temp[r]; Zpg;hj5_
for (i = l, j = r, k = l; k <= r; k++) { " Bx@(
if (a < b) { 5h/,*p6Nje
data[k] = temp[i++]; SPE)db3
a = temp; ^%,{R},s
} else { ]TT >3"Dw7
data[k] = temp[j--]; Is4,QnY_[
b = temp[j]; 86)2\uan
} }qM^J;uy
} QO}~"lMj
} N\*oL*[j
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/** nQmHYOF%
* @param data $h pUI
* @param l 3h:~NL
* @param i n5kGHL2
*/ :W0p36"
private void insertSort(int[] data, int start, int len) { @$r[$D v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O8.xt|
} .4\I?
} \85%d0@3
} neM.M)0
} 5NZuaN
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堆排序： Axsezr/
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package org.rut.util.algorithm.support; LH(P<k&
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import org.rut.util.algorithm.SortUtil; buX(mj:&
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/** a6n@
* @author treeroot fE~KWLm
* @since 2006-2-2 zN!W_2W*
* @version 1.0 QIMd`c
*/ SX"|~Pi(
public class HeapSort implements SortUtil.Sort{ T;(,9>Qsu
8c.>6 Hy
/* (non-Javadoc) gZtQtFi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'Hx#DhiFz
*/ \JM6zR^Ef
public void sort(int[] data) { dP_QkO
MaxHeap h=new MaxHeap(); w>j5oz}
h.init(data); }d}gb`Du
for(int i=0;i h.remove(); <8 <P,
System.arraycopy(h.queue,1,data,0,data.length); 6ioj!w<N
} w{DU<e:
Dst;sLr[,
private static class MaxHeap{ ^WB[uFt-
Y^Buz<OiG
void init(int[] data){ ]Ik~TW&
this.queue=new int[data.length+1]; Oh1U=V2~
for(int i=0;i queue[++size]=data; `3\U9ZH23
fixUp(size); P?V+<c{
} =F_uK7W
} m+'1c}n^7
u!D?^:u=)
private int size=0; #6\mTL4vg
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private int[] queue; s U`#hL6;
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public int get() { L;opQ~g
return queue[1]; >P j#?j*Y
} c9[{P~y
\(Rj2
public void remove() { :;Z/$M16B
SortUtil.swap(queue,1,size--); y`zdI_!7
fixDown(1); ?MFC(Wsh
} |.Vgk8oTl
file://fixdown dYISjk@
private void fixDown(int k) { ?VotIruR
int j; /E<Q_/'Z
while ((j = k << 1) <= size) { y/S3ZJY
if (j < size %26amp;%26amp; queue[j] j++; #9TL5-1y
if (queue[k]>queue[j]) file://不用交换 1oO(;--u_
break; xMk>r1Ud
SortUtil.swap(queue,j,k); c\ZI 5&4jT
k = j; 3\Xk)a_
} NE#`ZUr3
} E'{:HX
private void fixUp(int k) { @lDnD%vZ`
while (k > 1) { fGV'l__\\
int j = k >> 1; 25Z}.))
if (queue[j]>queue[k]) W]Xwt'ABz
break; z{3`nd,
SortUtil.swap(queue,j,k); MRz f#o<H
k = j; ).jQ+XE'>
} Z#u{th
} q'S[TFMNE
q(~jP0pj%
} ;v]C8}L^
f`ibP6%
} r jn:E
n#"G)+h3#
SortUtil： OH>Gc-V
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package org.rut.util.algorithm; -`5]%.E&8
&V axv$v}
import org.rut.util.algorithm.support.BubbleSort; dn'|~zf.
import org.rut.util.algorithm.support.HeapSort; VM5'd
import org.rut.util.algorithm.support.ImprovedMergeSort; ugN%8N
import org.rut.util.algorithm.support.ImprovedQuickSort; ep3VJ"^
import org.rut.util.algorithm.support.InsertSort; 9 D.wW
import org.rut.util.algorithm.support.MergeSort; ,1 H|{<
import org.rut.util.algorithm.support.QuickSort; yH:p*|%:
import org.rut.util.algorithm.support.SelectionSort; {=?[:5
import org.rut.util.algorithm.support.ShellSort; 38&K"
N}/V2K]Q
/** lPz`?Hn
* @author treeroot ]lKUpsQI
* @since 2006-2-2 {w3<dfJ
* @version 1.0 mN{H^
*/ .7 j#F
public class SortUtil { ABoB=0.l
public final static int INSERT = 1; l$!ExXEZO;
public final static int BUBBLE = 2; V"8Go;[
public final static int SELECTION = 3; KJ/Gv#Kj
public final static int SHELL = 4; umuj>
public final static int QUICK = 5; MjQ>&fUK
public final static int IMPROVED_QUICK = 6; p/0dtnXa(
public final static int MERGE = 7; sE]z.Po=
public final static int IMPROVED_MERGE = 8; T] H'l
public final static int HEAP = 9; yT<"?S>D
93Gj#Mk
public static void sort(int[] data) { ]Z UE !
sort(data, IMPROVED_QUICK); Z~(X[Zl :
} 5/6Jq
private static String[] name={ N4qBCBr(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z{BgAI,
}; _0 43,
g3'dkS!
private static Sort[] impl=new Sort[]{ IN6L2/Q
new InsertSort(), hyPS 6Y'1
new BubbleSort(), \5N\NN @J
new SelectionSort(), bhDqRM
new ShellSort(), 21<Sfsc$
new QuickSort(), $[HCetaqV
new ImprovedQuickSort(), yo_zc<
new MergeSort(), ;L76V$&
new ImprovedMergeSort(), 0;1O;JRw
new HeapSort() )Dv;,t
}; 66B,Krz1n
4VF]tX?o
public static String toString(int algorithm){ l(QntP
return name[algorithm-1]; G?~Yw'R^8
} Q>X1 :Zn3
AWFq5YMSI
public static void sort(int[] data, int algorithm) { c<q33dZ!*
impl[algorithm-1].sort(data); D)4#AI
} n|.eL8lX.<
^Hf?["m^@
public static interface Sort { {LKW%G7
public void sort(int[] data); GRj [2I7:
} ]n1#8T&<*z
OJydt;a
public static void swap(int[] data, int i, int j) { &!:mL],
int temp = data; X/%!p<}:'
data = data[j]; It'kO jx]
data[j] = temp; ]GHw~s?
} H_8PK$c;
} j/wQ2"@a