[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; I`X!M!dB)
} [`b,SX x
int i1=l; gac31,gH
int i2=mid+1; 6qFzo1LO
for(int cur=l;cur<=r;cur++){ IDT\hTPIs
if(i1==mid+1) ?'+]d;UO&
data[cur]=temp[i2++]; 5L[imOM0
else if(i2>r) M,@M5o2u
data[cur]=temp[i1++]; m+;U,[%[*E
else if(temp[i1] data[cur]=temp[i1++]; T`":Q1n
else j8p<HE51
data[cur]=temp[i2++]; k>mXh{(
} =VzJ>!0
} j \jMN*dmV
|ymW0gh7o$
} or3OLBf*Q
'`2'<^yO
改进后的归并排序: L%/>Le}VX
cB){b'WJ
package org.rut.util.algorithm.support; r=0PW_r:
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import org.rut.util.algorithm.SortUtil; 5>.ATfAsV
4X]/8%]V
/** iL);bv W
* @author treeroot 1>rQ).eT
* @since 2006-2-2 !DFTg4xb
* @version 1.0 v#&;z_I+
*/ Y4 z
public class ImprovedMergeSort implements SortUtil.Sort { j0}wv~\
mMwV5\(
private static final int THRESHOLD = 10; pI-Qq%Nwt
U1y!R<qlp
/* X^N6s"2
* (non-Javadoc) J FnE{
* Z9$pY=8^?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @2hhBW
*/ W9Azp8)p]
public void sort(int[] data) { X-(( [A
int[] temp=new int[data.length]; 81x/bx@L%
mergeSort(data,temp,0,data.length-1); :XFQ}Cl
} Hq 5#.rZ#
d9:I.SA)E
private void mergeSort(int[] data, int[] temp, int l, int r) { dY&v(~&;]
int i, j, k; H 4ELIF#@
int mid = (l + r) / 2; fYy w2"
if (l == r) pJ}U'*Z2
return; gi,7X\`KQ
if ((mid - l) >= THRESHOLD) 3-hcKE
mergeSort(data, temp, l, mid); oQ r.cKD ?
else STjb2t,a
insertSort(data, l, mid - l + 1); d.~ns4bt9
if ((r - mid) > THRESHOLD) A?#i{R
mergeSort(data, temp, mid + 1, r); ]vz6DJs
else 8%m\J:eR
insertSort(data, mid + 1, r - mid); g4=1['wW
t;VMtIW+E
for (i = l; i <= mid; i++) { c=\_[G(
temp = data; xIm2t~io
} 'yX\y 6I
for (j = 1; j <= r - mid; j++) { X,l7>>L{g
temp[r - j + 1] = data[j + mid]; xbhHP2F|
} 8A&N+sT
int a = temp[l]; b'+Wf#.]f0
int b = temp[r]; Yv]vl6<
for (i = l, j = r, k = l; k <= r; k++) { VVch%
if (a < b) { BedL `[,
data[k] = temp[i++]; 51|s2+GG
a = temp; "rLm)$I
} else { siCi+Y
data[k] = temp[j--]; v\6.#>NQ
b = temp[j]; kR %,:
} KyX2CfW}t
} C('D]u$Hdk
} &%j`WF4p
d^RcJ3w
/** HN NeH;L
* @param data ? bWc<]
* @param l k8}fKVU;
* @param i ASoBa&vX
*/ p1niS:}j
private void insertSort(int[] data, int start, int len) { W?zj^y[w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j:1N&7<FU
} 02;'"EmP$
} cI8\d 4/py
} ;~:Z~8+{c
} + >dC
-{OJM|W+
堆排序： 0qFO+nC
) 6QJZ$
package org.rut.util.algorithm.support; c{1)-&W
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import org.rut.util.algorithm.SortUtil; Zj]tiN f\"
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/** >x6\A7
* @author treeroot Dz~^AuD6
* @since 2006-2-2 k8stXW-w
* @version 1.0 lH_pG~
*/ K\Q4u4DjbJ
public class HeapSort implements SortUtil.Sort{ {= &&J@:
-FZNk}
/* (non-Javadoc) `Z>=5:+G@2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F%y#)53g
*/ 81|[Y'f
public void sort(int[] data) { kK}?NKqT
MaxHeap h=new MaxHeap(); B^TgEr
h.init(data); 2 oL$I(83
for(int i=0;i h.remove(); C<a&]dN/
System.arraycopy(h.queue,1,data,0,data.length); ],!}&#|
} 3t9+YdNKU
ZKt{3P
private static class MaxHeap{ B]yO
h#UPU7;
void init(int[] data){ Z<d=v3q
this.queue=new int[data.length+1]; ?H_@/?
for(int i=0;i queue[++size]=data; /!Ag/SmS!9
fixUp(size); P|ibUxSA~,
} j07A>G-=
} C~>0K,C0^
|qQ6>IZ
private int size=0; C3=0st$
Dj=$Q44
private int[] queue; 30I-E._F
qm_r~j
public int get() { g; -3
return queue[1]; Jb> X$|N'%
} Da[#X`Kp$
Y]6dYq{k
public void remove() { KI\bV0$p<
SortUtil.swap(queue,1,size--); `*Wg&u
fixDown(1); L:&'z:,<
} e`LvHU_0
file://fixdown DS4y@,/)'
private void fixDown(int k) { GKWsJO5 n
int j; Q1kM 4Up
while ((j = k << 1) <= size) { g51UIN]o-
if (j < size %26amp;%26amp; queue[j] j++; Zp{K_ec{
if (queue[k]>queue[j]) file://不用交换 x76;wQ
break; nvQX)Xf
SortUtil.swap(queue,j,k); jpYZ) So-
k = j; KIY`3Fl09
} u"7!EhX&
} L^CB#5uG
private void fixUp(int k) { Y<Ae_yLa
while (k > 1) { mmjWLrhlu
int j = k >> 1; ?vWF[ DRd'
if (queue[j]>queue[k]) {l/`m.Z
break; 1jzu-s,F
SortUtil.swap(queue,j,k); 2H8\P+
k = j; cna%;f.
} er BerbEEH
} Yevd h<
*@@dO_%6
} "-:g.x*d
\L?A4Qx)_
} PpLhj
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SortUtil： '.%Omc
+:aNgO#e8
package org.rut.util.algorithm; a)S6Z
5sEk rT '
import org.rut.util.algorithm.support.BubbleSort; ep5`&g]3
import org.rut.util.algorithm.support.HeapSort; \TzBu?,v8
import org.rut.util.algorithm.support.ImprovedMergeSort; #:Q\
import org.rut.util.algorithm.support.ImprovedQuickSort; {QdoIPr3
import org.rut.util.algorithm.support.InsertSort; @R;k@b
import org.rut.util.algorithm.support.MergeSort; hDg"?{
import org.rut.util.algorithm.support.QuickSort; `DGI|3
import org.rut.util.algorithm.support.SelectionSort; 7NOF^/nU
import org.rut.util.algorithm.support.ShellSort; /i_FA]Go
_ A{F2M
/** !%(kMN
* @author treeroot keQRS+9
* @since 2006-2-2 t<}N>%ZO
* @version 1.0 M'X,7hZ
*/ @!ja/Y^
public class SortUtil { +S#Xm4
public final static int INSERT = 1; XCxxm3t
public final static int BUBBLE = 2; /`#JM
public final static int SELECTION = 3; {ktwX\z
public final static int SHELL = 4; NTK9`#SA
public final static int QUICK = 5; =%I;Y& K
public final static int IMPROVED_QUICK = 6; mss.\
public final static int MERGE = 7; S&l [z,
public final static int IMPROVED_MERGE = 8; ][//G|9
public final static int HEAP = 9; hH05p!2
XCyb[(4
public static void sort(int[] data) { m#_M"B.cm
sort(data, IMPROVED_QUICK); &>Z;>6J,
} [\fwnS_1
private static String[] name={ vaVV1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g%ys|
}; +_*iF5\
M=3w
private static Sort[] impl=new Sort[]{ !"hzGgOOX
new InsertSort(), vq3:N'
new BubbleSort(), #Rs5W
new SelectionSort(), .*+jD^Gr
new ShellSort(), qJtLJ<=1
new QuickSort(), {{pN7Z
new ImprovedQuickSort(), !lZ}kz0
new MergeSort(), IY!8j$'|
new ImprovedMergeSort(), F]N?_ bo
new HeapSort() \?Xoa"^
}; ,|#biT-<T
@0tX,Z9
public static String toString(int algorithm){ 2zv:j7
return name[algorithm-1]; ,j(E>g3
} ]w4?OK(j
Ne3YhCC>
public static void sort(int[] data, int algorithm) { K2v[_a~@
impl[algorithm-1].sort(data); ?-0, x|ul
} qrZ3`@C4k
d|W=_7z
public static interface Sort { Y}C|4"V
public void sort(int[] data); @S5HMJ2=
} /&czaAR-
m' |wlI[lq
public static void swap(int[] data, int i, int j) { 5vS[{;<&
int temp = data; tU!Yg"4Q
data = data[j]; fb[lL7
data[j] = temp; MlS5/9m@^
} @1bl<27
} 23'<R i