[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; .SLpgYFL{
} mo+!79&
int i1=l; uq/Fapl
int i2=mid+1; l<p<\,nV$
for(int cur=l;cur<=r;cur++){ ##%&*vh
if(i1==mid+1) cF_`QRtO
data[cur]=temp[i2++]; IT7],pM
else if(i2>r) FUf.3@}
data[cur]=temp[i1++]; 9)8Cf%<(
else if(temp[i1] data[cur]=temp[i1++]; FQ>kTm`d
else ~<-mxOe
data[cur]=temp[i2++]; =~"X/>'
} bT6VxbNS
} 9|3sNFGX
W/3sJc9
} vvG"rU
ExQ\qp3
改进后的归并排序: 4*L*"vKa
#.!#"8{0_
package org.rut.util.algorithm.support; UCXRF
jABFdNjri
import org.rut.util.algorithm.SortUtil; SME9hS$4
AusjN-IL
/** 4l{$dtKbI
* @author treeroot 93Zij<bH?e
* @since 2006-2-2 Mna yiJl
* @version 1.0 c%WO#}r|
*/ xXc>YTK'
public class ImprovedMergeSort implements SortUtil.Sort { ~ g-(
m"-kkH{I
private static final int THRESHOLD = 10; c1r+?q$f
;aj;(Z.p)
/* SQhVdYU1'
* (non-Javadoc) 7r50y>
* yj@k0TWT$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q7<d|s
*/ OR*JWW[]
public void sort(int[] data) { C/QmtT~`e
int[] temp=new int[data.length]; t|V<K^
mergeSort(data,temp,0,data.length-1); &AOGg\
} )0/*j]Kf
iE}] E
private void mergeSort(int[] data, int[] temp, int l, int r) { / Y od
int i, j, k; 6VC|] |*
int mid = (l + r) / 2; a5R. \a<q
if (l == r) MPDRMGR@i
return; h_{f_GQ"
if ((mid - l) >= THRESHOLD) ]8fn1Hx\
mergeSort(data, temp, l, mid); L"/?[B":
else )bR0>3/
insertSort(data, l, mid - l + 1); BWvM~no
if ((r - mid) > THRESHOLD) iC5HrOl6U
mergeSort(data, temp, mid + 1, r); .drY
else <ch}]-_
insertSort(data, mid + 1, r - mid); ;[UI]?A%
.ARM~{q6)@
for (i = l; i <= mid; i++) { 4# PxJG6m
temp = data; s9a`2Wm
} 1 z~|SmP1
for (j = 1; j <= r - mid; j++) { !mTq6H12 !
temp[r - j + 1] = data[j + mid]; vBOY[>=
} bS2g4]$'po
int a = temp[l]; {lH'T1^m
int b = temp[r]; ?O+.
for (i = l, j = r, k = l; k <= r; k++) { &6C]|13;
if (a < b) { ;l~a|KW0
data[k] = temp[i++]; {hJCn*m_
a = temp; K!Fem6R
} else { }<X*:%#b
data[k] = temp[j--]; ?P-O4
b = temp[j]; e"wzb< b
} ;y. ;U#O
} \Cu=Le^
} k(pJVez
1;1;-4k7I
/** A$N%deb
* @param data ['Lo8 [
* @param l #^r-D[/m
* @param i [8UZ5_1WL
*/ 2oEuqHL
private void insertSort(int[] data, int start, int len) { gm2|`^Xq$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Uz_p-J0
} =.;ib6M
} Za1mI^ L1
} [ i,[^
} E"_{S.Wc
1HKA`]D"p
堆排序： 0?8>{!I
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package org.rut.util.algorithm.support; i9zh X1#
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import org.rut.util.algorithm.SortUtil; \XmplG:
k kAg17 ^
/** y>x"/jzF#
* @author treeroot iAQ[;M3p
* @since 2006-2-2 y705
* @version 1.0 u9|Eos i
*/ ']eN4H&=?}
public class HeapSort implements SortUtil.Sort{ 2F`#df
yQUrHxm
/* (non-Javadoc) jvsSP?]n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x%r$/=
*/ (kB
public void sort(int[] data) { ;$6L_C4B
MaxHeap h=new MaxHeap(); .pWRV<25
h.init(data); b#p0s?*
for(int i=0;i h.remove(); uP%VL}%0
System.arraycopy(h.queue,1,data,0,data.length); %;ED}X
} HBR/" m
VD7-;
private static class MaxHeap{ -rI7ihr*
M&V4|D
void init(int[] data){ M j[+h|e
this.queue=new int[data.length+1]; ;Us6:}s
for(int i=0;i queue[++size]=data; SQ> Yf\
fixUp(size); DJgM>&Y6,
} `Wjq$*
} C(v'7H{4cW
#K:iB*
private int size=0; 1="]'!2Is
fqbeO9x
private int[] queue; )cRHt:
:FC)+OmJ
public int get() { hNZ_= <D!
return queue[1]; 53:u6bb;
} N*|EfI|X
Z0zEX?2mb
public void remove() { qjkWCLOd
SortUtil.swap(queue,1,size--); \mGb|aF8
fixDown(1); *\xRNgEQ
} ]~dB|WB
file://fixdown ,&4 [`d
private void fixDown(int k) { 8A]8yX =
int j; 0'r}]Mws
while ((j = k << 1) <= size) { >S`=~4
if (j < size %26amp;%26amp; queue[j] j++; @HMH>;haE
if (queue[k]>queue[j]) file://不用交换 flqr["czwK
break; &$CyT6mb^
SortUtil.swap(queue,j,k); ~s4JGV~R
k = j; EH2):
} lshSRir
} ym6Emf]
private void fixUp(int k) { ag:<%\2c
while (k > 1) { O}cfb4"
int j = k >> 1; _){u5%vv
if (queue[j]>queue[k]) |tI{MztJ"c
break; 2& Hl wpx
SortUtil.swap(queue,j,k); rjcH[U(
k = j; XS@iu,uO
} ?:60lCqj
} g~K-'Nw
Q$.CtECo
} E{JTy{z-
M^WoV }'
} |n,O!29
i=b'_SZ'
SortUtil： @]X!#&2>
wjX0r7^@
package org.rut.util.algorithm; h6LjReNo
1iR\M4?Frf
import org.rut.util.algorithm.support.BubbleSort; #Qz9{1\G
import org.rut.util.algorithm.support.HeapSort; K ~\b+
import org.rut.util.algorithm.support.ImprovedMergeSort; qfFa" a
import org.rut.util.algorithm.support.ImprovedQuickSort; LL3| U
import org.rut.util.algorithm.support.InsertSort; fy>3#`T-
import org.rut.util.algorithm.support.MergeSort; N/{=j
import org.rut.util.algorithm.support.QuickSort; MJe/ \
import org.rut.util.algorithm.support.SelectionSort; cqh1,h$sG
import org.rut.util.algorithm.support.ShellSort; 6@^ ?dQ
B\AyG4J
/** r\b$/:y<e
* @author treeroot -6F\=
* @since 2006-2-2 u{WI 4n?
* @version 1.0 ^v;8 (eF
*/ Gv)*[7
public class SortUtil { T`v
public final static int INSERT = 1; hZ<FCY,/?
public final static int BUBBLE = 2; %:l\Vhhz
public final static int SELECTION = 3; O[1Q#
public final static int SHELL = 4; ,82?kky
public final static int QUICK = 5; 2-g 5Gb2|
public final static int IMPROVED_QUICK = 6; d<\X)-"
public final static int MERGE = 7; +BI%.A`2
public final static int IMPROVED_MERGE = 8; L-|7 &
public final static int HEAP = 9; ;2BPEo>z9
P&o+ut:
public static void sort(int[] data) { 'g)5vI~'
sort(data, IMPROVED_QUICK); TffeCaBv
} }/NL"0j+4
private static String[] name={ :8)3t! A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !C' Y 7
}; Gqar5
"$%&C%t
private static Sort[] impl=new Sort[]{ 6 ;\>,
new InsertSort(), /6N!$*8
new BubbleSort(), )J\ JAUj
new SelectionSort(), $Ovq}Rexc
new ShellSort(), :Z;kMrU
new QuickSort(), >]\oVG
new ImprovedQuickSort(), QE;,mC>
new MergeSort(), Tt0]G_
new ImprovedMergeSort(), SV2\vby}C
new HeapSort() ~ebm,3?
}; 1RQM-0W,
,8p-EH
public static String toString(int algorithm){ S^e e<%-
return name[algorithm-1]; [9CBTSr
} 4%jSqT@
v>Kv!OY:c
public static void sort(int[] data, int algorithm) { ir)~T0
impl[algorithm-1].sort(data); Vc|QW
} Mm"0Ip2"
>?X(,c
public static interface Sort { Y#-pK)EeU
public void sort(int[] data); hdH-VR4
} d{'u97GDc
gWjz3ob
public static void swap(int[] data, int i, int j) { |2X+( F Ed
int temp = data; L|2WTyMU
data = data[j]; >Cr'dKZ}
data[j] = temp; ve/|"RB
} #|l#
} )!`>Q|]}Zd