[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; %Rsf6rJ
} =Wy`X0h
int i1=l; ! 7*_Z=
int i2=mid+1; J_[[BJ&}x
for(int cur=l;cur<=r;cur++){ ]zq_gV8k
if(i1==mid+1) PD T\Q\J^X
data[cur]=temp[i2++]; +-!|%jG`%v
else if(i2>r) b`W'M:$
data[cur]=temp[i1++]; ?^$4)Y>Kf
else if(temp[i1] data[cur]=temp[i1++]; ^.1VhTB
else C.B}Py+
data[cur]=temp[i2++]; nk3<]u
} aCi^^}!
} pn%|;
TX [%s@C
} qD%&\ZT
-b>O4_N
改进后的归并排序: n`T[eb~
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package org.rut.util.algorithm.support; (F '
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import org.rut.util.algorithm.SortUtil; 'kg]|"M
S}[:;p?F`
/** (DMnwqr
* @author treeroot %V1T!<
* @since 2006-2-2 (:HbtrI
* @version 1.0 O9=H [b
*/ p,u<gJUL
public class ImprovedMergeSort implements SortUtil.Sort { KIBZQ.uG
c)!s[oL
private static final int THRESHOLD = 10; %3+hz$E
a={qA4N
/* B{UoNm@
* (non-Javadoc) ecZOX$'5
* Ww tQ>'R"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XhD fI &
*/ *n_4Rr
public void sort(int[] data) { wY_-
int[] temp=new int[data.length]; ZUJOBjb` K
mergeSort(data,temp,0,data.length-1); c2mt<DtWW
} Ru')X{]25
y^46z(I
private void mergeSort(int[] data, int[] temp, int l, int r) { 3R:i*8C
int i, j, k; <.(/#=2
int mid = (l + r) / 2; 9w<Bm"G
if (l == r) 1HWJxV"
return; j4SGA#;v
if ((mid - l) >= THRESHOLD) UR2)e{RXg
mergeSort(data, temp, l, mid); A^@<+?
else L.:QI<n
insertSort(data, l, mid - l + 1); LqsJHG
if ((r - mid) > THRESHOLD) ^r :A^q
mergeSort(data, temp, mid + 1, r); )9jQ_
else / lM~K:
insertSort(data, mid + 1, r - mid); (<JDD]J
:Fd9N).%
for (i = l; i <= mid; i++) { h}&IlDG
temp = data; N_Ld,J%g
} OwIy(ukTI
for (j = 1; j <= r - mid; j++) { N~J Eia%
temp[r - j + 1] = data[j + mid]; hsO.521g
} d@f2Vxe7
int a = temp[l]; Od]xIk+E
int b = temp[r]; \` ^Tbn:
for (i = l, j = r, k = l; k <= r; k++) { T|2%b*/
if (a < b) { V@'S#K#
data[k] = temp[i++]; "[S 6w
a = temp; 5g>kr<K
} else { >b?)WNk
data[k] = temp[j--]; z ;Nk& <?
b = temp[j]; R./6Q1
} }F`2$Q+CW
} W*`6ero
} pDq_nx9
TPFmSDq
/** f:&OOD o
* @param data "]V|bz o0a
* @param l * .VZ(wX
* @param i 1+}Ud.v3VW
*/ V>92/w.fe
private void insertSort(int[] data, int start, int len) { mM{v>Em2K#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~Fb?h%w
} swL|Ff`$
} k\%v;3nBK
} <uwCP4E
} O9)}:++T
FNEmGz/4
堆排序： %{abRBny
'k Z1&_{
package org.rut.util.algorithm.support; ah9',((!
9G/2^PI
import org.rut.util.algorithm.SortUtil; t3g!5
i4rF~'h@
/** + qqN
* @author treeroot #e>MNc 'z
* @since 2006-2-2 dKpa5f7
* @version 1.0 't.F.t
*/ g^UWf<xp
public class HeapSort implements SortUtil.Sort{ S]=Vr%irX
NYvj?>[y
/* (non-Javadoc) 82!GM.b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ):ZumG#o
*/ }l!_m.#e
public void sort(int[] data) { 0N;d)3
MaxHeap h=new MaxHeap(); i]?xM2(N
h.init(data); 17MjIX
for(int i=0;i h.remove(); Qo *]l_UO;
System.arraycopy(h.queue,1,data,0,data.length); ACltV"dB^
} }*R6p?L5
C~V$G}mM
private static class MaxHeap{ m kf{_!TK
PzDgl6C
void init(int[] data){ c (8J
this.queue=new int[data.length+1]; J3+8s[oJ>
for(int i=0;i queue[++size]=data; P<x
fixUp(size); <U pjAuG8
} )6+W6:
} AI;=k
F &}V65
private int size=0; t&]Mt7
8:fiO|~%
private int[] queue; K.m[S[cy
U~t(YT
public int get() { p n>`v
return queue[1]; R,1,4XT
} ^0-=(JrC
pk1M.+
public void remove() { hiHp@"l<
SortUtil.swap(queue,1,size--); We?:DM [
fixDown(1); 1tpD|
} [Cp{i<C
file://fixdown y8z%s/gRh
private void fixDown(int k) { &}1)]6q$
int j; ,$-PC=Ti(
while ((j = k << 1) <= size) { L9oZ7o
if (j < size %26amp;%26amp; queue[j] j++; G)7sXEe
if (queue[k]>queue[j]) file://不用交换 q/?_djv
break; musxX58%
SortUtil.swap(queue,j,k); Zh^w)}(W
k = j; 64fG,b
} Kjw\SQ)2~
} #KW:OFT
private void fixUp(int k) { ?~IZ{!
while (k > 1) { PM7/fv*,
int j = k >> 1; 9To6Rc;
if (queue[j]>queue[k]) "QS7?=>*F
break; ||aU>Wj4
SortUtil.swap(queue,j,k); >,3 3Jx
k = j; g"Bv!9*H
} !d(V7`8
} d*L'`BBsp
1[^d8!U
} dZmq
y>8?RX8
} nT"z(\i.!J
>k|[U[@
SortUtil： e_V(G
p;Kr664
package org.rut.util.algorithm; qE{S'XyM,
]XU#i#;c
import org.rut.util.algorithm.support.BubbleSort; ,-)1)R\.
import org.rut.util.algorithm.support.HeapSort; /$(D>KU
import org.rut.util.algorithm.support.ImprovedMergeSort; vNGvEJ`qn
import org.rut.util.algorithm.support.ImprovedQuickSort; ( Iew%U
import org.rut.util.algorithm.support.InsertSort; W:\VFPf2
import org.rut.util.algorithm.support.MergeSort; Jiq[VeLe
import org.rut.util.algorithm.support.QuickSort; <!^Z|E
import org.rut.util.algorithm.support.SelectionSort; ^ZG1
import org.rut.util.algorithm.support.ShellSort; NY x4& *le
C.<4D1}P
/** bAp`lmFI
* @author treeroot \ua.%|
* @since 2006-2-2 g\'sGt3O
* @version 1.0 2|BE{91
*/ -;}Wm[
public class SortUtil { x{$NstGB
public final static int INSERT = 1; if>] )g2lr
public final static int BUBBLE = 2; RMK U5A7
public final static int SELECTION = 3; uE(w$2Wi
public final static int SHELL = 4; 1CbC|q
public final static int QUICK = 5; whCv9)x
public final static int IMPROVED_QUICK = 6; ^MUM04l
public final static int MERGE = 7; :%{7Q$Xv<
public final static int IMPROVED_MERGE = 8; Kl?1)u3^4
public final static int HEAP = 9; {NR~>=~K-
7~'@m(9e
public static void sort(int[] data) { zdCt#=QV?R
sort(data, IMPROVED_QUICK); Za w+
} X!Q"p$D4(
private static String[] name={ h 8s*FI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t At+5H
}; kWFR(J&R
Lrq&k40y
private static Sort[] impl=new Sort[]{ V EzIWNV
new InsertSort(), o;fQ,rP%
new BubbleSort(), GF&"nW9A
new SelectionSort(), 5 *_#"
new ShellSort(), /l L*U
new QuickSort(), |UG)*t/
new ImprovedQuickSort(), T[~X~dqwn"
new MergeSort(), [z\*Zg
new ImprovedMergeSort(), :[doYizk:
new HeapSort() lV8Mr6m
}; &3<]FK
&!ZpBR(
public static String toString(int algorithm){ b11C3TyQT
return name[algorithm-1]; *RPI$0
} 2 E^P=jU`
i&Ea@b
public static void sort(int[] data, int algorithm) { \T0`GpE
impl[algorithm-1].sort(data); X`&E,;bIb
} D$\ EZ
$3>|RlxYA
public static interface Sort { ":OXs9Yg
public void sort(int[] data); SPBXI[[-
} =B 9U
xQQ6D
public static void swap(int[] data, int i, int j) { 0!Yi.'+
int temp = data; Xma0k3;-
data = data[j]; U/>5C:
data[j] = temp; l}JVRU{
} ~0L>l J
} E%TvGe;#