[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; .~TI%&#
} NG23
int i1=l; W|(<z'S
int i2=mid+1; A,(9|#%L
for(int cur=l;cur<=r;cur++){ r;E5e]w*-
if(i1==mid+1) 3,#v0#
data[cur]=temp[i2++]; Ndyo)11z
else if(i2>r) E`{DX9^
data[cur]=temp[i1++]; ]z| 2
else if(temp[i1] data[cur]=temp[i1++]; MXjN./
else K<%8.mZ7
data[cur]=temp[i2++]; p["pGsf
} TtQd#mSI\
} a^ys7UV
l.Z+.<@
} cr?ZXu_
E*kZGHA
改进后的归并排序: E>O@Bv
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package org.rut.util.algorithm.support; ;%cW[*Dw
8*|*@
import org.rut.util.algorithm.SortUtil; B__e*d:)!m
`B,R+==G:
/** Ekh)l0 l
* @author treeroot :LC3>x`:
* @since 2006-2-2 f zL5C2d
* @version 1.0 tV4wkS=R|
*/ $iA:3DM07
public class ImprovedMergeSort implements SortUtil.Sort { U-U(_W5&
6&L;Sw#Dg
private static final int THRESHOLD = 10; M&sQnPFH
NL2D,
/* Q]/{6:C
* (non-Javadoc) %:Y(x$Qy
* B|{E[]iK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VW;E14
*/ (E~6fb"c
public void sort(int[] data) { ZS`Kj(D
int[] temp=new int[data.length]; 8o.|P8%
mergeSort(data,temp,0,data.length-1); =H}x
} dP>FXgY
)n[=)"rf
private void mergeSort(int[] data, int[] temp, int l, int r) { :"b:uQ
int i, j, k; Vn\jUEC
int mid = (l + r) / 2; j0w@ \gO<
if (l == r) 8:0,jnS
return; Der'45]*^
if ((mid - l) >= THRESHOLD) mX?t|:[b
mergeSort(data, temp, l, mid); 7) af
else JxEz1~WK &
insertSort(data, l, mid - l + 1); !DHfw-1K
if ((r - mid) > THRESHOLD) P^U.VXY}
mergeSort(data, temp, mid + 1, r); .'h^
else oiD{Z
insertSort(data, mid + 1, r - mid); ml!c0<
BxZ7Bk
for (i = l; i <= mid; i++) { kpNp}b8']
temp = data; NJ;m&Tm,DF
} #.C2_MN>
for (j = 1; j <= r - mid; j++) { )5y"T0]
temp[r - j + 1] = data[j + mid]; WLta{A?
} 0O-"tP8o
int a = temp[l]; ( )f)
int b = temp[r]; xDsKb_
for (i = l, j = r, k = l; k <= r; k++) { ;>F1?5P{
if (a < b) { Y0m?ZVt
data[k] = temp[i++]; yJ6g{#X4K<
a = temp; hF`<I.z}
} else { 'tU\~3k
data[k] = temp[j--]; | h+vdE8
b = temp[j]; c\O2|'JzE
} !|- U,
} zJ:%iL@
} )_?h;wh 84
.MID)PY-
/** A>HCX 4i
* @param data j*;.>akY7
* @param l \~t!M~H
* @param i TmM~uc7mj
*/ %az6\"n
private void insertSort(int[] data, int start, int len) { G)_Zls2;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1KR4Wq@
} <(V~eo e
} kLpq{GUv:
} PSX o"
} hb %F"Q
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堆排序： &] xtx>qg<
)r)ZmS5O
package org.rut.util.algorithm.support; 8#o2qQ2+
\w(0k^<7
import org.rut.util.algorithm.SortUtil; 1?.NJ<)F
{vZAOz7#
/** u`Y~r<?P(
* @author treeroot 4x@W]*i
* @since 2006-2-2 Z)@[N 6\?
* @version 1.0 |sP0z !)b
*/ 6BM$u v4
public class HeapSort implements SortUtil.Sort{ S1m5z,G
#EB Rc4>,
/* (non-Javadoc) .b^!f<j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %L wq.
*/ %Y5F@=>&
public void sort(int[] data) { f&RjvVP?s
MaxHeap h=new MaxHeap(); ^62I 5k/u
h.init(data); <U\8&Uv>
for(int i=0;i h.remove(); NA`8 ^PZ
System.arraycopy(h.queue,1,data,0,data.length); g-NrxyTBlx
} ra_v+HR7
j'hWhLax
private static class MaxHeap{ I:YgKs)[
e#k)F.TZ:%
void init(int[] data){ >l=^3B,j
this.queue=new int[data.length+1]; IY mkZ?cW
for(int i=0;i queue[++size]=data; HS\'{4P
fixUp(size); bw+IH-b
} Nw-U*y
} dy'lM ;@-
`>)pqI%L[g
private int size=0; !;hp
i'^! SEt
private int[] queue; f|)~_JH
vg_PMy\
public int get() { x\VP X
return queue[1]; bka%W@Y%
} Fdq5:v?k
!C^>tmqS
public void remove() { IR;3{o
SortUtil.swap(queue,1,size--); *&R|0I{>
fixDown(1); V)ag ss w?
} FP*kA_z$
file://fixdown FT-=^VA\
private void fixDown(int k) { }n'W0Sa
int j; [ q[2\F?CE
while ((j = k << 1) <= size) { ,Tk53"
if (j < size %26amp;%26amp; queue[j] j++; zqZ/z>Gf
if (queue[k]>queue[j]) file://不用交换 NmF8BmIj
break; d3#e7rQ8
SortUtil.swap(queue,j,k); {SRD\&J[
k = j; fE3%$M[V7
} }1lZW"{e[
} o#BI_#b
private void fixUp(int k) { uss!E!_%,
while (k > 1) { kf9]nIo
int j = k >> 1; imhE=6{
if (queue[j]>queue[k]) Gm0}KU
break; A:pD:}fm}D
SortUtil.swap(queue,j,k); ?.beN[X
k = j; h|lH`m^
} kXlI*h
} \|M[W~8
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} ap"pQ[t;
EVA&By6_k
} u),.q7(m
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SortUtil： }Gx@1)??
uf:'"7V7
package org.rut.util.algorithm; K*4ib/'E a
Q:b0!
import org.rut.util.algorithm.support.BubbleSort; HNlW.y"
import org.rut.util.algorithm.support.HeapSort; $'<$:;4b3
import org.rut.util.algorithm.support.ImprovedMergeSort; VRSBf;?
import org.rut.util.algorithm.support.ImprovedQuickSort; bMv[.Z@v(
import org.rut.util.algorithm.support.InsertSort; \%V !& !'
import org.rut.util.algorithm.support.MergeSort; S?OCy4dk:
import org.rut.util.algorithm.support.QuickSort; Z/4bxO=m
import org.rut.util.algorithm.support.SelectionSort; "s(|pQh;
import org.rut.util.algorithm.support.ShellSort; ~lqNWL^l
j7NOYm5N
/** Z J1@z.
* @author treeroot !:tr\L {
* @since 2006-2-2 I#7H)^us
* @version 1.0 D-x*RRkpp
*/ Ra:UnA
public class SortUtil { vmo!
public final static int INSERT = 1; [ <k&]Kv
public final static int BUBBLE = 2; `G:hC5B
public final static int SELECTION = 3; t\Qm2Q)>
public final static int SHELL = 4; Vh]=sd<F
public final static int QUICK = 5; X gtn}7N.
public final static int IMPROVED_QUICK = 6; L;+e)I]
public final static int MERGE = 7; c+8 Y|GB
public final static int IMPROVED_MERGE = 8; _x,(576~
public final static int HEAP = 9; /ZH*t\
5~E{bW$
public static void sort(int[] data) { Xr88I^F;
sort(data, IMPROVED_QUICK); :&2%x
} 1Oak8 \G
private static String[] name={ -SzCeq(p%5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L6ypn)l
}; cFuQ>xR1
?MFXZ/3(ba
private static Sort[] impl=new Sort[]{ Q7/Jyx|
new InsertSort(), bBGg4{
new BubbleSort(), 4\uq$.f-
new SelectionSort(), ~SsfkM"
new ShellSort(), |t;Ktl
new QuickSort(), T| R!Aw.
new ImprovedQuickSort(), rL?{+S]&^)
new MergeSort(), n0%S: (
new ImprovedMergeSort(), 3x z z* <
new HeapSort() #Pg?T%('`
}; h53G$Ol.
4! F$nmG)
public static String toString(int algorithm){ V!e*J,g
return name[algorithm-1]; #$!^1yO
} ?g0dr?H
{Hvkn{{'
public static void sort(int[] data, int algorithm) { ]+tO
impl[algorithm-1].sort(data); ]@ Vp:RGMr
} Y$+v "
2^U?Ztth6
public static interface Sort { qQ,(O5$|
public void sort(int[] data); dwiLu&]u
} vVsaGW
=eh!eZ9
public static void swap(int[] data, int i, int j) { k RSY;V
int temp = data; BV\~Dm]"
data = data[j]; :X7O4?ww
data[j] = temp; 2|`Mb~E;
} s=z$;1C
} u~mpZ"9$ 3