[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; s}DNu<"g
} NkQain9
int i1=l; uL^X$8K;(
int i2=mid+1; R^.c
for(int cur=l;cur<=r;cur++){ MW0CqMi]T
if(i1==mid+1) 5UQ[vHMqI
data[cur]=temp[i2++]; S Z &[o&H
else if(i2>r) , _xJ9_
data[cur]=temp[i1++]; k;.<DN
else if(temp[i1] data[cur]=temp[i1++]; UYpln[S
else rWBgYh
data[cur]=temp[i2++]; $<f+CtD4
} clr]gib
} YLV$#a3
D~TK'&
} ON"V`_dq+M
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改进后的归并排序: .o8pC
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package org.rut.util.algorithm.support; 6X$\:>
8 ;=?Lw?
import org.rut.util.algorithm.SortUtil; _$v$v$74^
x/ P\qI
/** Tn$| Xa+:s
* @author treeroot NE Z ]%
* @since 2006-2-2 w aDJ
* @version 1.0 |8\et
*/ h5))D!
public class ImprovedMergeSort implements SortUtil.Sort { O)r>AdLGn
i^/H>E%u
private static final int THRESHOLD = 10; ;;LiZlf
aQ)g7C
/* ry4:i4/[
* (non-Javadoc) 11JO[
* 1$"wN z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `y.i(~^1
*/ XP65
public void sort(int[] data) { ?=?9a
int[] temp=new int[data.length]; 5}_,rF?cX
mergeSort(data,temp,0,data.length-1); '9 <APUyu
} ,q Bu5t
J-Fqw-<aFJ
private void mergeSort(int[] data, int[] temp, int l, int r) { l`{JxVg
int i, j, k; Oin:5K)4-
int mid = (l + r) / 2; r}t%DH
if (l == r) uC1v^!D
return; +@#-S
if ((mid - l) >= THRESHOLD) H, O_l%
mergeSort(data, temp, l, mid); pB,@<\l %
else Umk!m] q
insertSort(data, l, mid - l + 1); [m]O^Hp{{
if ((r - mid) > THRESHOLD) R<1[hH9"o
mergeSort(data, temp, mid + 1, r); ?s: 2~Qlu
else 1Q9eS&
insertSort(data, mid + 1, r - mid); GSg/I.)S
]F,v#6qi
for (i = l; i <= mid; i++) { o=doL{#
temp = data; K7d]p0d'
} j[y+'O
for (j = 1; j <= r - mid; j++) { C8 2lT_7"
temp[r - j + 1] = data[j + mid]; [Uu!:SZ
} *:V"C\`^n
int a = temp[l]; aAkO>X%[
int b = temp[r]; 1He'\/#
for (i = l, j = r, k = l; k <= r; k++) { RIxGwMi%
if (a < b) { *AN2&>Y
data[k] = temp[i++]; jo=,j/,l
a = temp; {2%@I~US
} else { _{'HY+M
data[k] = temp[j--]; ^'aMp}3iu
b = temp[j]; \9dC z;
} ;-T%sRI:|
} 0@8EIQxK"
} K)t+lJ
}))JzrqAe
/** To19=,:
* @param data m/W)IG>
* @param l %y;Cgo[
* @param i F>A&L8
*/ |(a<b
private void insertSort(int[] data, int start, int len) { pUaGrdGxzQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AZYu/k
} ySwvjP7f
} #N"K4@]{
} 4]]1JL(Ka
} DcQsdeuQ
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堆排序： |^E#cI
co!#.
package org.rut.util.algorithm.support; NbnuQPb'
nr<&j#!L
import org.rut.util.algorithm.SortUtil; 3pKr {U92
?$xZ$zW
/** 3YF*TxKx
* @author treeroot KCkA4`IeM
* @since 2006-2-2 v-@xO&<
* @version 1.0 CCZ]`*wJ
*/ za20Y?)[
public class HeapSort implements SortUtil.Sort{ we&g9j'
9L'R;H?L
/* (non-Javadoc) |JW-P`tL0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JY tM1d
*/ Pz1[ b$%
public void sort(int[] data) { 0UvN ws
MaxHeap h=new MaxHeap(); (s`yMUC+
h.init(data); \f_YJit
for(int i=0;i h.remove(); 6uf+,F
System.arraycopy(h.queue,1,data,0,data.length); e&(Di,%:
} Ue<Y ~A
DKfw8"L]
private static class MaxHeap{ IU`&h2KZ.
ggUJ -M'2h
void init(int[] data){ yA+:\%y$
this.queue=new int[data.length+1]; 0g@ 8x_3
for(int i=0;i queue[++size]=data; c91rc>
fixUp(size); 5M2G ;o
} K?q1I<94
} 'i|z>si[*
JYB<};,
private int size=0; \$Nx`daFi
t*zBN!Wu_
private int[] queue; L;0ZB=3n
X|F([,o
public int get() { 'o2x7~C@
return queue[1]; bqxbOQd
} ^MesP:[2
bb6J$NR
public void remove() { el*C8TWlw
SortUtil.swap(queue,1,size--); 37@_"
fixDown(1); b"y][5VE
} =M'y& iz-
file://fixdown $!<J_d*
private void fixDown(int k) { A({8p
int j; q*oUd/F8
while ((j = k << 1) <= size) { AopCxaJ`
if (j < size %26amp;%26amp; queue[j] j++; t/K<fy 6
if (queue[k]>queue[j]) file://不用交换 >*v^E9Y
break; 7 Znr2I
SortUtil.swap(queue,j,k); HKk;oG
k = j; eGS1% [
} MH`H[2<\!,
} 0SXWt? }
private void fixUp(int k) { hgCeU+H
while (k > 1) { 0.-2FHc9L
int j = k >> 1; J}qk:xGL
if (queue[j]>queue[k]) ?3"bu$@8
break; aU3 m{pE
SortUtil.swap(queue,j,k); 9Kw4K#IqQ
k = j; 2bS)|#v<_t
} I#D{6%~
} qHfs*MBJ%
-bK#&o,
} x)wIGo
=~% B}T
} /I3#WUc;![
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SortUtil： h1Ca9Z_
*s/sF@8<X
package org.rut.util.algorithm; ~l%Dcp
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import org.rut.util.algorithm.support.BubbleSort; @ba5iIt
import org.rut.util.algorithm.support.HeapSort; s%Q pb{
import org.rut.util.algorithm.support.ImprovedMergeSort; ^IuHc_
import org.rut.util.algorithm.support.ImprovedQuickSort; xNTO59Y-s
import org.rut.util.algorithm.support.InsertSort; n`T 4aDm
import org.rut.util.algorithm.support.MergeSort; 2+Z2`k]AC
import org.rut.util.algorithm.support.QuickSort; iKa}@U
import org.rut.util.algorithm.support.SelectionSort; tnz BNW8
import org.rut.util.algorithm.support.ShellSort; MPMJkL$F^
/_?E0r
/** YBN. waL
* @author treeroot C:g2E[#
* @since 2006-2-2 XB-pOtVm
* @version 1.0 zPU& }7
*/ A+3@N99HeH
public class SortUtil { [1'`KJ]
public final static int INSERT = 1; Zr_{Z@IpU
public final static int BUBBLE = 2; MI|DOp
public final static int SELECTION = 3; C_?L$3 U0
public final static int SHELL = 4; ]`&EB~K&NY
public final static int QUICK = 5; |C@)#.nm[
public final static int IMPROVED_QUICK = 6; ho2o/>Ef3
public final static int MERGE = 7; Z.$ncP0s
public final static int IMPROVED_MERGE = 8; &(\z
public final static int HEAP = 9; 3=1aMQ
mCe,(/>l+
public static void sort(int[] data) { _d&zHlc_
sort(data, IMPROVED_QUICK); WEUr;f
} VcT(n7
private static String[] name={ Ze'AZF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V^=z\wBZ
}; ;VM/Cxgep
Y4}!9x
private static Sort[] impl=new Sort[]{ D{h1"q
new InsertSort(), dC_L~ }=
new BubbleSort(), ;Yyg(Ex
new SelectionSort(), Rk56H
new ShellSort(), f.rz2)o
new QuickSort(), ;RW!l pGjP
new ImprovedQuickSort(), Mi9A%ZmP
new MergeSort(), Q <EFd
new ImprovedMergeSort(), (F]f{8
new HeapSort() /s(/6~D|
}; ox] LlRK
,IxAt&kN
public static String toString(int algorithm){ Z:09]r1
return name[algorithm-1]; g/W<;o<v(I
} ,2DKphh
7NRq5d(lP
public static void sort(int[] data, int algorithm) { {QTfD~z^K
impl[algorithm-1].sort(data); \y{Bnp5h
} RS#)uC5/%
FD*`$.e3\
public static interface Sort { B cd6~
public void sort(int[] data); MFaK=1
} ]<A|GY0q1
Z,qo jtw
public static void swap(int[] data, int i, int j) { [ECSJc&i
int temp = data; U2=5Nt5
data = data[j]; wt[MzpRP
data[j] = temp; %F9%t
} zFqH)/
} &4sUi K"