[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; r]0(qg
} `0?^[;[u[
int i1=l; t~ -J %$
int i2=mid+1; y5_XHi@u~o
for(int cur=l;cur<=r;cur++){ bjlkX[{}I
if(i1==mid+1) u^l*5F%DK
data[cur]=temp[i2++]; 7gm:ZS
else if(i2>r) <9`?Z-lJP
data[cur]=temp[i1++]; _e*c
else if(temp[i1] data[cur]=temp[i1++]; mY`@'
else m`c#:s'_
data[cur]=temp[i2++]; SBX|Bcyk*
} Yc d3QRB
} vb %T7
;,dkJ7M
} [.a;L">
O] H=s
改进后的归并排序: b~j~
c# xO<
package org.rut.util.algorithm.support; {|XQO'Wg
a!D*)z Y
import org.rut.util.algorithm.SortUtil; -1CEr_(P^
]%Y\ZIS
/** %@P``
* @author treeroot 8[~~gYl
* @since 2006-2-2 [^M|lf
* @version 1.0 x<@kjfm5
*/ D M}s0O$0
public class ImprovedMergeSort implements SortUtil.Sort { 0Z,{s158L
O~6Q;qP
private static final int THRESHOLD = 10; .uKx>YB}
7WP%J-
/* x{Sd P$
* (non-Javadoc) }%x}fu#
* <raG07{!*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V!xwb:J
*/ ;R!*I%
public void sort(int[] data) { Mn@$;\:
int[] temp=new int[data.length]; xg} ug[
mergeSort(data,temp,0,data.length-1); U@?6*,b(.
} 6JH56
]~8v^A7u
private void mergeSort(int[] data, int[] temp, int l, int r) { U*qNix
int i, j, k; q & b5g !
int mid = (l + r) / 2; TP{Gt.e
if (l == r) ;E#\
return; (z2Z)_6L*L
if ((mid - l) >= THRESHOLD) `NSy"6{Z
mergeSort(data, temp, l, mid); %[ /<+
else sB6dpD
insertSort(data, l, mid - l + 1); ~:EW>Fq%i
if ((r - mid) > THRESHOLD) ^dfx~C
mergeSort(data, temp, mid + 1, r); G?/c/rG
else xr.XU'
insertSort(data, mid + 1, r - mid); ~ezCu_
qm'b'!gq~
for (i = l; i <= mid; i++) { sT`^ljp4
temp = data; &K *X)DAs
} hiwIWd:H
for (j = 1; j <= r - mid; j++) { Gs_qO)~xo
temp[r - j + 1] = data[j + mid]; #Qd'+M
} k" YHsn
int a = temp[l]; !| xZ6KV
int b = temp[r]; 4LsHs
for (i = l, j = r, k = l; k <= r; k++) { )* TF"
if (a < b) { 9U^$.Lb
data[k] = temp[i++]; QrC/ssf}
a = temp; k_?~<vTM
} else { Hbk&6kS
data[k] = temp[j--]; FJT1i@N
b = temp[j]; _]=9#Fg7{
} CZ3].DA|z
} 9!}q{2j
} Pz@/|&]
`(DJs-xD
/** MCU9O
* @param data Q0~j$Jc
* @param l ^.vmF>$+I
* @param i (ua q<Cvg
*/ rl?7W];
private void insertSort(int[] data, int start, int len) { s<&[\U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OJ/SYZ.r
} %LQ/q3?_
} ?4G(N=/&
} JMlV@t7y<
} n3ZAF'
\A<v=VM|
堆排序： k)":v3^
}1U*A#aN7K
package org.rut.util.algorithm.support; `f)(Y1%.
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import org.rut.util.algorithm.SortUtil; 6peyh_
2\0Oji\6
/** (A{NF(
* @author treeroot r5 yO5W
* @since 2006-2-2 =& -[TPW
* @version 1.0 OOB^gf}$'
*/ zZ=$O-&%
public class HeapSort implements SortUtil.Sort{ T'1gy}
`FJ|W6%
/* (non-Javadoc) {Q~7M$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aFY u}kl
*/ KG8W8&q
public void sort(int[] data) { fg&eoI'f
MaxHeap h=new MaxHeap(); u9]1X1wV
h.init(data); &?+WXL>
for(int i=0;i h.remove(); T2weAk#J
System.arraycopy(h.queue,1,data,0,data.length); D.*>;5:0'
} } `T8A
vM`~)rO@!
private static class MaxHeap{ |RhM| i
B:9.e?t
void init(int[] data){ Sj-[%D*
this.queue=new int[data.length+1]; IU!Ht>
for(int i=0;i queue[++size]=data; kus}WJ
fixUp(size); `,Orf ZMb
} _k2w(ew?
} >85zQ 1aL
?QpNjsF
private int size=0; S~3\3qt$
ZHkw6@|
private int[] queue; `Ko[r R+
^od<JD4
public int get() { K]fpGo
return queue[1]; SDBt @=Nl
} BQjGv?p0s
`;F2n2@
public void remove() { Fr5 Xp
SortUtil.swap(queue,1,size--); 3z[$4L'.
fixDown(1); @`|)Ia<
} &5Y_>{,
file://fixdown Hwu4:^OL|
private void fixDown(int k) { @-"R$HOT
int j; 9y~"|t
while ((j = k << 1) <= size) { Do*n#=
if (j < size %26amp;%26amp; queue[j] j++; MzTW8
if (queue[k]>queue[j]) file://不用交换 ;>ozEh#8w
break; s".HEP~]=
SortUtil.swap(queue,j,k); ,W*H6fw+
k = j; 1 Z[f {T)
} 9B/1*+ M
} Mqv[XHfB
private void fixUp(int k) { _x %1F
while (k > 1) { *Km7U-BG
int j = k >> 1; w>979g
if (queue[j]>queue[k]) YV([2
break; 8_Z/o5s
SortUtil.swap(queue,j,k); g`?:=G:a*
k = j; `w<J25
} QUOKThY?
} sN/+
Gi7RMql6Q
} `# ^0cW
QxpKX_@Q5
} kso*}uh0
gx;O6S{
SortUtil： )^/0cQcJ
PW)aLycPK
package org.rut.util.algorithm; =~|:t&v=c
{THqz$KN
import org.rut.util.algorithm.support.BubbleSort; cm@;*
import org.rut.util.algorithm.support.HeapSort; Vb)zZ^va+
import org.rut.util.algorithm.support.ImprovedMergeSort; : F9|&q-W,
import org.rut.util.algorithm.support.ImprovedQuickSort; bQQVj?8jp
import org.rut.util.algorithm.support.InsertSort; !'W-6f
import org.rut.util.algorithm.support.MergeSort; jv&+<j`r
import org.rut.util.algorithm.support.QuickSort; ~&g a1r2v?
import org.rut.util.algorithm.support.SelectionSort; urZ8j?}c
import org.rut.util.algorithm.support.ShellSort; )2.)3w1_4
'^}+Fv<O
/** ~UPZ<
* @author treeroot g.C5r]=+&
* @since 2006-2-2 n?QZFeI`
* @version 1.0 rVzI_zYqp'
*/ 'uC59X4l
public class SortUtil { t9u|iTY f!
public final static int INSERT = 1; y0IK,W'&?
public final static int BUBBLE = 2; $[(d X!]F
public final static int SELECTION = 3; ?L|yaC~
public final static int SHELL = 4; .j?kEN?w
public final static int QUICK = 5; #n7Yr,|Z
public final static int IMPROVED_QUICK = 6; QK <\kVZ8
public final static int MERGE = 7; ]WL|~mG
public final static int IMPROVED_MERGE = 8; h-XY4gq/
public final static int HEAP = 9; I>n g`
&<1`O
public static void sort(int[] data) { F ?=9eISLJ
sort(data, IMPROVED_QUICK); !%S4n
} }ugxN0
private static String[] name={ !j^&gRH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bFGDgwe z
}; Qv{,wytyO
f/ahwz
private static Sort[] impl=new Sort[]{ "J19*<~
new InsertSort(), , =y#m-9
new BubbleSort(), ClQe4uo{
new SelectionSort(), x';uCKWV
new ShellSort(), CL9yEy"V
new QuickSort(), r"]'`qP,
new ImprovedQuickSort(), 0k[2jh
new MergeSort(), ;l!`C':'
new ImprovedMergeSort(), yrr) y
new HeapSort() ?R'Y?b
}; JYmAn?o-
GyC)EFd
public static String toString(int algorithm){ +5X DF
return name[algorithm-1]; \l,rpVv5m
} 5%i:4sMx *
AW8'RfC.
public static void sort(int[] data, int algorithm) { p/olCmHD)
impl[algorithm-1].sort(data); X0uJNHO
} =G${[V\
.SS<MDcqIt
public static interface Sort { r>|-2}{N/
public void sort(int[] data); @;)PSp*j
} ;y1Q6eN
vg\/DbI'
public static void swap(int[] data, int i, int j) { `_qK&&s
int temp = data; wAF,H8 -DK
data = data[j]; jRQ+2@n{E
data[j] = temp; K*vU5S
} *e{PxaF!C
} (! KG)!