[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; &(irri_
} J4=~.&6
int i1=l; %~G)xK?W*
int i2=mid+1; Y+lZT4w
for(int cur=l;cur<=r;cur++){ _?mu2!X
if(i1==mid+1) V\4'Hd
data[cur]=temp[i2++]; wR\%tumk
else if(i2>r) Z+FJ cvYx
data[cur]=temp[i1++]; [N.4i" Cd
else if(temp[i1] data[cur]=temp[i1++]; FzW7MW>\x
else 8)'OXR0/
data[cur]=temp[i2++]; 1;S@XC>
} ;5dJ5_}
} Pv/$;R%
<08)G7
} >'7Icx
7'CdDB6&.
改进后的归并排序: "}(*Km5Po
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package org.rut.util.algorithm.support; +<&_1%5+
oyK'h9Wt1
import org.rut.util.algorithm.SortUtil; c7,p5[
42~tdD
/** |+f@w/+
* @author treeroot ?7*.S Lt
* @since 2006-2-2 Qw}uB$S>
* @version 1.0 V*}ft@GPD
*/ >-0Rq[)
public class ImprovedMergeSort implements SortUtil.Sort { /&_$+Iun
YZMSiDv[e
private static final int THRESHOLD = 10; 58V`I5_
n#|ljC
/* _<qe= hie!
* (non-Javadoc) #~BsI/m
* whxTCIV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .J"QW~g^
*/ -U.>K,M
public void sort(int[] data) { A+de;&
int[] temp=new int[data.length]; @>cz$##`
mergeSort(data,temp,0,data.length-1); UQc!"D
} FC@h6\+a
C3)*Mn3%P
private void mergeSort(int[] data, int[] temp, int l, int r) { c#(Hh{0
int i, j, k; -Aaim`06bv
int mid = (l + r) / 2; 0"}J!c<g
if (l == r) kOdXbw9v
return; WPI<SsLd
if ((mid - l) >= THRESHOLD) dhv?36uE
mergeSort(data, temp, l, mid); HCfme<'
else %D1 |0v8}
insertSort(data, l, mid - l + 1); Swa0TiT(
if ((r - mid) > THRESHOLD) /#jH#f[
mergeSort(data, temp, mid + 1, r); 6I2`oag
else eu={6/O
insertSort(data, mid + 1, r - mid); 4PjC[A*
lonV_Xx
for (i = l; i <= mid; i++) { |W_;L6)
temp = data; ORuC("
} K*I!:1;3N
for (j = 1; j <= r - mid; j++) { y^Uh<L0M
temp[r - j + 1] = data[j + mid]; Kv0V`}<Yc
} lg"aB
int a = temp[l]; 5.1z9[z
int b = temp[r]; :^7>kJ5?
for (i = l, j = r, k = l; k <= r; k++) { Rjp7H
if (a < b) { ]-8WM5\qJM
data[k] = temp[i++]; @@JyCUd
a = temp; *:bexDH
} else { P9`R~HO'`
data[k] = temp[j--]; s@Dln Du.
b = temp[j]; B6=?Qp/f
} v%:VV*MxF
} V'hb 4}@
} $vrkxn
c+D<
/** v5>A1\
* @param data [?%q,>F
* @param l >)F "lR:o
* @param i zD)/QFILy
*/ Hvb8+"?~
private void insertSort(int[] data, int start, int len) { IjGPiC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pHT]2e#
} sYjhQN=Y*
} L!>nl4O>`
} ~8s2p%~
} Mg#yl\v
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堆排序： !O,Sq/=.
o]EL=j
package org.rut.util.algorithm.support; vJLGy]
KL3Z(
import org.rut.util.algorithm.SortUtil; ? D _kQl
wA\5-C7j
/** ~)^'5^
* @author treeroot ;z.L^V0
* @since 2006-2-2 oNZ_7tU
* @version 1.0 d]poUN~x
*/ h5SJVa
public class HeapSort implements SortUtil.Sort{ q.p.$)
u\V^g
/* (non-Javadoc) 3pg=9*{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *,mI=1
*/ AHRJ7l;a
public void sort(int[] data) { ak7kb75o
MaxHeap h=new MaxHeap(); XeX"IhgS>E
h.init(data); DY -5(6X
for(int i=0;i h.remove(); 3/>7b(
System.arraycopy(h.queue,1,data,0,data.length); 1rJ2}d\y
} MjU|XQS:
V(_1q
private static class MaxHeap{ B*N1)J\5
p}^5ru
void init(int[] data){ < Hkq
this.queue=new int[data.length+1]; Nai5!_'
for(int i=0;i queue[++size]=data; @^A5{qQ\
fixUp(size); _Z23lF9
} @@)2 12
} ]QhTxrF"
HwFX,?
private int size=0; G18w3BFx
q0iJy@?A
private int[] queue; maXg(Lu
d'RvpoM
public int get() { D7;9D*o\
return queue[1]; $@D a|d4
} v1TFzcHl<
Ho>Np&
public void remove() { r-<O'^C
SortUtil.swap(queue,1,size--); EU$.{C_O(
fixDown(1); Ks-$:~?5":
} H"#ITL
file://fixdown f#\YX tR,k
private void fixDown(int k) { &EfQ%r}C
int j; :OG I|[
while ((j = k << 1) <= size) { iQ;p59wSzL
if (j < size %26amp;%26amp; queue[j] j++; KwuucY
if (queue[k]>queue[j]) file://不用交换 Upe}9xf
break; uh)S;3|
SortUtil.swap(queue,j,k); 1^!SuAA@
k = j; T$I_nxh[)L
} V)j[`,M:
} -L1785pB85
private void fixUp(int k) { T3X'73M
while (k > 1) { +(W1x C0
int j = k >> 1; xT%`"eM}
if (queue[j]>queue[k]) n t}7|h|
break; p;O%W@n"
SortUtil.swap(queue,j,k); cCe~OlXQ
k = j; lN,?N{6s
} j]Jgz<
} ieFl4hh[G
o4);5~1l
} 1~5DIU^
qN $t_
} 0cd_l 2f#g
S6TNu+2w4
SortUtil： ,o&C"sb
S#7YJ7 K"N
package org.rut.util.algorithm; MUO<o
\$ytmtf5
import org.rut.util.algorithm.support.BubbleSort; <$A,Ex94
import org.rut.util.algorithm.support.HeapSort; c0qp-=^&.
import org.rut.util.algorithm.support.ImprovedMergeSort; -8Jw_
import org.rut.util.algorithm.support.ImprovedQuickSort; CM;b_E)9)f
import org.rut.util.algorithm.support.InsertSort; =p+y$
import org.rut.util.algorithm.support.MergeSort; !%iHJwS#
import org.rut.util.algorithm.support.QuickSort; &{}Mds
import org.rut.util.algorithm.support.SelectionSort; S<tw5!tJ
import org.rut.util.algorithm.support.ShellSort; S+ kq1R
1E+12{~m"i
/** g!'R}y
* @author treeroot >|$]=e,Z
* @since 2006-2-2 l<6u@,%s
* @version 1.0 @(3F4Z.i%.
*/ >f(?Mxh2
public class SortUtil { k }=<51c
public final static int INSERT = 1; kZ40a\9 Ye
public final static int BUBBLE = 2; E}@C4pS
public final static int SELECTION = 3; " kDiK`i
public final static int SHELL = 4; J2YQdCL
public final static int QUICK = 5; z3oi(
public final static int IMPROVED_QUICK = 6; 3k Ci5C
public final static int MERGE = 7; 0MG>77
public final static int IMPROVED_MERGE = 8; b)LT[>f
public final static int HEAP = 9; {]0e=#hw
;cor\R
public static void sort(int[] data) { dzf2`@8#
sort(data, IMPROVED_QUICK); eqbN_$>
} #9vC]Gm
private static String[] name={ LG #^g6P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8-q^.<9
}; _yg_?GH
fab'\|Y
private static Sort[] impl=new Sort[]{ U!wi;W2
new InsertSort(), fz&B$1;8
new BubbleSort(), :E:e ^$p
new SelectionSort(), );5o13h2
new ShellSort(), __=H"UhWv
new QuickSort(), g@.$P>Bh
new ImprovedQuickSort(), ([>ecS@eO
new MergeSort(), z _!ut
new ImprovedMergeSort(), Cf{F"o
new HeapSort() rQ;w{8J\t
}; Q;M\fBQO}&
(3#PKfY+
public static String toString(int algorithm){ Ey6R/M)?:y
return name[algorithm-1]; O9=/\Kc
} $|K d<wv
qQ@| Cj
public static void sort(int[] data, int algorithm) { 'h>uR|
impl[algorithm-1].sort(data); jc^QWK*q
} dG\wW@}J
5>k:PKHL
public static interface Sort { @u~S!(7.Wi
public void sort(int[] data); baxZ>KNi
} |3H+b,M5
)2}R1K>
public static void swap(int[] data, int i, int j) { \2SbW7"/;P
int temp = data; m'4f'tbN
data = data[j]; ?J}Q&p.
data[j] = temp; $( hT{C,K
} $] 6u#5
} @MW@mP)#