[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; R7\T.;8+
} '+EtnWHs
int i1=l; OQ(w]G0LP
int i2=mid+1; 8c`EB-y
for(int cur=l;cur<=r;cur++){ i~3\jD=<
if(i1==mid+1) ;*%3J$T+
data[cur]=temp[i2++]; qu\cU(H|
else if(i2>r) T.(C`/VM
data[cur]=temp[i1++]; k3(q!~a:.}
else if(temp[i1] data[cur]=temp[i1++]; c,CcKy;+
else Bnp\G h
data[cur]=temp[i2++]; &?[g8A
} WOg pDs
} 3</W}]$)p
A"tE~m;"7
} nsL"'iQ
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改进后的归并排序: E3hXs6P
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package org.rut.util.algorithm.support; jn +*G<NJ
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import org.rut.util.algorithm.SortUtil; _-|/$ jZ
"D,}|
/** 8]K+,0m6
* @author treeroot VUon>XQ G
* @since 2006-2-2 M!YGv
* @version 1.0 'yo-`nNFD
*/ /IQ$[WR cx
public class ImprovedMergeSort implements SortUtil.Sort { K 0e*K=UM
P b-4$n2c
private static final int THRESHOLD = 10; r>#4Sr
M3U?\g
/* }y1r yeW<
* (non-Javadoc) >*MGF=.QG
* c(b2f-0!4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QE|x[?7e,!
*/ b_&:tE--]
public void sort(int[] data) { 6&+}Hhe
int[] temp=new int[data.length]; e'yw8U5E/
mergeSort(data,temp,0,data.length-1); X2|&\G9c
} w5 #;Lm
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private void mergeSort(int[] data, int[] temp, int l, int r) { j.!5&^;u4
int i, j, k; I5*<J n
int mid = (l + r) / 2; n-9a0_{k
if (l == r) ;m=k FZ?
return; e45)t}'
if ((mid - l) >= THRESHOLD) &^`[$LtYd
mergeSort(data, temp, l, mid); shD4";8*@
else :q>)c]
insertSort(data, l, mid - l + 1); Quwq_.DU
if ((r - mid) > THRESHOLD) "S+AkLe(
mergeSort(data, temp, mid + 1, r); i#NtiZ.t=
else bE,#,
insertSort(data, mid + 1, r - mid); mBxMDnh
=Fc}T%
for (i = l; i <= mid; i++) { q[Tl#*P?y
temp = data; cQ;@z2\
} #qu;{I#W3
for (j = 1; j <= r - mid; j++) { JXV#V7
temp[r - j + 1] = data[j + mid]; ev#/v:$?
} jM-7
int a = temp[l]; l,6' S8=
int b = temp[r]; ~g9~D}48k'
for (i = l, j = r, k = l; k <= r; k++) { 4k9$' k
if (a < b) { p"7]zq]'
data[k] = temp[i++]; O=vD6@QI
a = temp; 6i;q=N$'
} else { LSR0yCU
data[k] = temp[j--]; f8\DAN
b = temp[j]; 1,Es'
} Ey.%: O-Dv
} KjMwrMgC
} n<P&|RTZ
qm<-(Qc(W
/** R|k:8v{V=
* @param data _%3p&1ld
* @param l XqU0AbQ
* @param i ahdwoB
*/ 2%v6h
private void insertSort(int[] data, int start, int len) { p' 6h9/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6B]i}nFH{+
} f,kV
} >7)QdaB
} rmi&{o:
} R_9M-RP6*
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堆排序： G5|'uKz2"
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package org.rut.util.algorithm.support; XTA:Y7"O
#]QS
import org.rut.util.algorithm.SortUtil; V*r/0|vd
}+}Cl T
/** Ga+Cb2$
* @author treeroot sOVpDtZ]LR
* @since 2006-2-2 @#*{* S8
* @version 1.0 i1X!G|Awfv
*/ L8f_^ *,
public class HeapSort implements SortUtil.Sort{ D-D8La?0p
]yQqx*
/* (non-Javadoc) M1]w0~G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VeqB/QX
*/ P^ht$)Y
public void sort(int[] data) { I]HLWF
MaxHeap h=new MaxHeap(); nltOX@P-
h.init(data); lKf kRyO_S
for(int i=0;i h.remove(); nVrV6w
System.arraycopy(h.queue,1,data,0,data.length); PbY.8d%2/k
} $2Awp@j
ul b0B"
private static class MaxHeap{ mML B?I
@=}NMoNH
void init(int[] data){ w#_7,*6]
this.queue=new int[data.length+1]; |z8_]o+|r1
for(int i=0;i queue[++size]=data; C8do8$
fixUp(size); eY%Ep=J
} JvEW0-B^l,
} 3UF^Ff<wo
EuA352x
private int size=0; ?9 W2ax-4
O$x +>^
private int[] queue; xnJ#}-.7
z:N?T0b(
public int get() { aO}p"-'
return queue[1]; BpGyjoJ2
} tk)}4b^\%j
V3T.EW
public void remove() { h#Mx(q
SortUtil.swap(queue,1,size--); C?MKbD=K
fixDown(1); A/&u/?*C
} \acGSW .c
file://fixdown ny!80I
private void fixDown(int k) { 8Ht=B,7T
int j; J*zQ8\f=}
while ((j = k << 1) <= size) { uhv_'Q
if (j < size %26amp;%26amp; queue[j] j++; 5!wjYQt3
if (queue[k]>queue[j]) file://不用交换 cmYzS6f,7
break; VD $PoP
SortUtil.swap(queue,j,k); %{UW!/
k = j; )Jw$&%/{1
} oLtzPC
} [S-#}C?~
private void fixUp(int k) { ;\f0II3
while (k > 1) { +;)Xu}
int j = k >> 1; ~OLyG$JJ
if (queue[j]>queue[k]) WRRR"Q$
break; !b+!] 2~g}
SortUtil.swap(queue,j,k); P(o>UDy
k = j; T!pA$eE
} rWqr-"0S.
} Z#l6BXK
.Iz JJp
} 4/_!F'j
6JeAXj1g+
} qVO,sKQ{
i5_l//]
SortUtil： arS@l<79
Bk@EQdn
package org.rut.util.algorithm; jwuSne
{9) HB:
import org.rut.util.algorithm.support.BubbleSort; {%RwZ'
import org.rut.util.algorithm.support.HeapSort; DGw*BN%`
import org.rut.util.algorithm.support.ImprovedMergeSort; }IdkXAB.
import org.rut.util.algorithm.support.ImprovedQuickSort; * bhb=~
import org.rut.util.algorithm.support.InsertSort; [jxh$}?P
import org.rut.util.algorithm.support.MergeSort; ]GsI|se
import org.rut.util.algorithm.support.QuickSort; G)f!AuN=
import org.rut.util.algorithm.support.SelectionSort; !aJ6Uf%R
import org.rut.util.algorithm.support.ShellSort; G8MLg#
Zlt,Us`
/** \IEuu^
* @author treeroot |oePB<N
* @since 2006-2-2 \@T;/Pj{[
* @version 1.0 sPl3JP&s
*/ )cL`$h4DD
public class SortUtil { 8A/rkoht*
public final static int INSERT = 1; P)hGe3
public final static int BUBBLE = 2; d/@P;YN!
public final static int SELECTION = 3; H(O|y2
public final static int SHELL = 4; 0QW;=@)d
public final static int QUICK = 5; ($8!r|g5#
public final static int IMPROVED_QUICK = 6; 4Me3{!HJz
public final static int MERGE = 7; )T&r770
public final static int IMPROVED_MERGE = 8; 2z AxGX
public final static int HEAP = 9; ;!7M<T$&
Mhb~wDQl
public static void sort(int[] data) { (^_INy*
sort(data, IMPROVED_QUICK); [r9HYju=
} : w>R|]
private static String[] name={ R((KAl]dL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i=hA. y`
}; -6X+:r`>u
zz<o4bR
private static Sort[] impl=new Sort[]{ T-x9IoE
new InsertSort(), "ub0}p4V
new BubbleSort(), r^ '
new SelectionSort(), RMid}BRE
new ShellSort(), [M:<!QXw
new QuickSort(), \C2HeA\#SW
new ImprovedQuickSort(), x2/ciC
new MergeSort(), 0Pt%(^
new ImprovedMergeSort(), (h[. Ie
new HeapSort() cK\?wZ| Y
}; e5"5 U7
H|MAbx 7
public static String toString(int algorithm){ b&d4(dk
return name[algorithm-1]; *iyc,f^w
} jR+kx:+
NSR][h_
public static void sort(int[] data, int algorithm) { #BgiDLh
impl[algorithm-1].sort(data); +CXq41g"c
} {d)L0KXK
hvA|d=R(
public static interface Sort { Hq?dqg'%~
public void sort(int[] data); g:6`1C
} ;RQ}OCz9}8
sheCwhV
public static void swap(int[] data, int i, int j) { }D3hP|.X
int temp = data; ; 3sjTqD
data = data[j]; 9/I xh?
data[j] = temp; Sw?EF8}[
} axK/YE7t
} [9F