[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; hg=BXe4:
} l#G }j^Q
int i1=l; 4Iou| H
int i2=mid+1; 2e @zd\
for(int cur=l;cur<=r;cur++){ 7Vxe]s
if(i1==mid+1) hr] :bR
data[cur]=temp[i2++]; |xQq+e}l<
else if(i2>r) 9QryW\6.@z
data[cur]=temp[i1++]; B[rxV
else if(temp[i1] data[cur]=temp[i1++]; 9AROvq|#
else wc5OK0|
data[cur]=temp[i2++]; >f*[U/{ K
} 3e.v'ccK&
} h7H#sL[^
X@ Gm:6
} ;qF#!Kb5
,3{z_Rax-
改进后的归并排序: %Pb 5PIk4
\4.U.pKY
package org.rut.util.algorithm.support; @BZ6{@*
]8XY"2b
import org.rut.util.algorithm.SortUtil; fuxBoB
c=T^)~$$
/** Bjz\L0d
* @author treeroot KR6*)?c`
* @since 2006-2-2 6_wf $(im
* @version 1.0 .qioEqK8!y
*/ i7[CqObzc
public class ImprovedMergeSort implements SortUtil.Sort { $z+iB;x
>_biiW~x:
private static final int THRESHOLD = 10; .wD>0Ig
Hize m!
/* rZy38Wo
* (non-Javadoc) gq6C6
* *Bt`6u.>e,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kQ$Q}3f
*/ |*N.SS
public void sort(int[] data) { |Mp_qg?g
int[] temp=new int[data.length]; g]V}azLr
mergeSort(data,temp,0,data.length-1); G^F4c{3c~
} 2oAPJUPOJ
cK>5!2b
private void mergeSort(int[] data, int[] temp, int l, int r) { $.}fL;BzVz
int i, j, k; *_$%Tv.]
int mid = (l + r) / 2; )Xa`LG=|
if (l == r) 6-#f1D 6
return; DFs J}` $
if ((mid - l) >= THRESHOLD) Etj*3/n|
mergeSort(data, temp, l, mid); B7TA:K
else 6:B[8otQ
insertSort(data, l, mid - l + 1); vZC2F
if ((r - mid) > THRESHOLD) vhEPk2wD,
mergeSort(data, temp, mid + 1, r); i6r%;ueLb
else A~-e?.
insertSort(data, mid + 1, r - mid); xkOyj`IS
/MSz{ %v
for (i = l; i <= mid; i++) { Y.@ vdW
temp = data; |nXs'TO'O
} :gb7Py'C
for (j = 1; j <= r - mid; j++) { +J$[RxQ#
temp[r - j + 1] = data[j + mid]; s_K:h
} jh`&c{#*)M
int a = temp[l]; FgRlxz
int b = temp[r]; lcvWx%/o@
for (i = l, j = r, k = l; k <= r; k++) { 5_M9T3
if (a < b) { Rs8`M8(4%
data[k] = temp[i++]; vN7a)s
a = temp; B4GgR,P@S
} else { 1d|+7
data[k] = temp[j--]; iO3@2J
b = temp[j]; >t?;*K\x"
} F[115/
} }9>W41
} 3Zdkf]Gh
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/** ar=uDb;
* @param data F^&_O*"
* @param l [Pby d
* @param i Am!$\T%2
*/ r.[!n)*
private void insertSort(int[] data, int start, int len) { +l2{EiQw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (5;w^E9*n;
} EG59L~nM
} br>"96A1l
} a*NcL(OC
} L=VJl[DL
m/JpYv~
堆排序： C*b!E:
GTNN4
package org.rut.util.algorithm.support; /{d7%Et6
-j`tBv)
import org.rut.util.algorithm.SortUtil; Qy*`s
7z)Hq./3@
/** pqBd#
* @author treeroot w=s:eM@
* @since 2006-2-2 gsqlWfa
* @version 1.0 bf-.SX~
*/ {2}O\A
public class HeapSort implements SortUtil.Sort{ ^hq`dr|R=
Jp!Q2}
/* (non-Javadoc) C3u/8Mrt7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \&`S~cV9
*/ 0[7\p\Q
public void sort(int[] data) { HO/Ij
MaxHeap h=new MaxHeap(); B4r4PSB>!
h.init(data); {PnvQ?|Z
for(int i=0;i h.remove(); t)=u}t$
System.arraycopy(h.queue,1,data,0,data.length); =66dxU?}
} y>3Zh5=
`6)GjZh^
private static class MaxHeap{ >_jT.d
U ]`SM6
void init(int[] data){ )/1AF^ E
this.queue=new int[data.length+1]; D kl4^}
for(int i=0;i queue[++size]=data; IC{\iwO/~c
fixUp(size); NBwxN
} 2%'{f
} y>_lxLhmO#
P hs4]!
private int size=0; P%A;EF~v
p#wQW[6
private int[] queue; D>|m8-@]
eRKuy l
public int get() { 26.),a
return queue[1]; ~1]4 J(+
} c>#T\AEkF
!K-lO{Z^
public void remove() { 1@rI4U@D
SortUtil.swap(queue,1,size--); @E %:ALJ
fixDown(1); D1rXTI$$
} AE?MEag
file://fixdown >?aPXC
private void fixDown(int k) { |T\`wcP`q
int j; OC34@YUj[
while ((j = k << 1) <= size) { .<%2ON_
if (j < size %26amp;%26amp; queue[j] j++; ]rGZ
if (queue[k]>queue[j]) file://不用交换 E}LuWFZ&
break; _;L%? -2c
SortUtil.swap(queue,j,k); VPW@y
k = j; }N[|2nR'
} `Sgj!/!F
} B( r~Nvc
private void fixUp(int k) { O{b<UP'85
while (k > 1) { 5x856RQ'
int j = k >> 1; g@0<`g
if (queue[j]>queue[k]) +yYxHIOZ(
break; p}H:t24Cr5
SortUtil.swap(queue,j,k); KZrg4TEVi
k = j; j3>0oe!
} `o/G0~T)
} O&BNhuW2
m}Xb#NAF8
} 2E5n07,
j11FEE<W
} )S?.YCv?
dpAj9CX(
SortUtil： vge4&H3a&
*rKj%Me
package org.rut.util.algorithm; TwPpZ@
-c%#Hd
import org.rut.util.algorithm.support.BubbleSort; CCoT
import org.rut.util.algorithm.support.HeapSort; p+x}$&<|
import org.rut.util.algorithm.support.ImprovedMergeSort; ~dc o
import org.rut.util.algorithm.support.ImprovedQuickSort; f2h`bO
import org.rut.util.algorithm.support.InsertSort; s Zn@ye^
import org.rut.util.algorithm.support.MergeSort; /Ne;Kdp
import org.rut.util.algorithm.support.QuickSort; .X1xpi%
import org.rut.util.algorithm.support.SelectionSort; -Cn x!g}
import org.rut.util.algorithm.support.ShellSort; Dh+<|6mx
vciO={M
/** s!73To}>
* @author treeroot q,;8Ka )
* @since 2006-2-2 ]?p 9)d=%<
* @version 1.0 &VPfI
*/ ]mzghH:E
public class SortUtil { 9U]3B)h%m
public final static int INSERT = 1; (V(8E%<c
public final static int BUBBLE = 2; k'6x_ G
public final static int SELECTION = 3; 2^aXXPC
public final static int SHELL = 4; WRCf[5
public final static int QUICK = 5; ^7Z#g0{^w
public final static int IMPROVED_QUICK = 6; :<p3L!?8y
public final static int MERGE = 7; )L+>^cJI<
public final static int IMPROVED_MERGE = 8; tl6x@%\
public final static int HEAP = 9; t~v_k\`{
Q]1s*P
public static void sort(int[] data) { 5M v<8P~
sort(data, IMPROVED_QUICK); sgLw,WZ:
} ]]Fe:>
private static String[] name={ ^\ku}X_[?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %\f<N1~*
}; @f!r"P]
mXwDB)O{)
private static Sort[] impl=new Sort[]{ 9Zj9e
new InsertSort(), )+ (GE
new BubbleSort(), 1j_ 6Sw(
new SelectionSort(), $Wn!vbL
new ShellSort(), 0/5{v6_rG
new QuickSort(), Xmny(j)g
new ImprovedQuickSort(), Ud:;kI%Vj
new MergeSort(), dbG902dR
new ImprovedMergeSort(), ~ugyUpY"
new HeapSort() jdf3XTw
}; &gdhq~4#
e3.q8r
public static String toString(int algorithm){ /B!Ik:c}
return name[algorithm-1]; .+A2\F.^
} -|2k$W
F\2<q$Zn+
public static void sort(int[] data, int algorithm) { h f{RI4Jc
impl[algorithm-1].sort(data); o`M.v[O
} !NO)|N>
/k.?x]Ab
public static interface Sort { '/F% ff
public void sort(int[] data); quL+UFuM
} |wM<n
%7A?gY81
public static void swap(int[] data, int i, int j) { Hrg -5_
int temp = data; ==npFjB
data = data[j]; 4 3G2{
data[j] = temp; UM}MK
} p5Wz.n.<'
} |xFSGrC