[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; NbdaP{{
} l;4F,iI
int i1=l; ?(z3/"g]
int i2=mid+1; be_t;p`3
for(int cur=l;cur<=r;cur++){ _]g6 3q
if(i1==mid+1) :n=+$Dq
data[cur]=temp[i2++]; R0>L[1o
else if(i2>r) -9mh|&z`
data[cur]=temp[i1++]; BshS@"8r
else if(temp[i1] data[cur]=temp[i1++]; XcXd7e
else rlq8J/0/+
data[cur]=temp[i2++]; .dV!du
} O;~1M3Ii
} *7ox_ R@
P&K~wP]
} z|Xl%8
LS`Gg7]S
改进后的归并排序: oKUJB.PF
hn-S$3')`
package org.rut.util.algorithm.support; ;rX4${h
<_5z^@N3$
import org.rut.util.algorithm.SortUtil; ?AEpg.9R-
^t"\PpmK<d
/** <m!\Ma
* @author treeroot @m6E*2Gg
* @since 2006-2-2 _<8n]0lX3
* @version 1.0 \*7Tj-#
*/ `k+k&t
public class ImprovedMergeSort implements SortUtil.Sort { lH[N*9G(
e>[QF+e)y
private static final int THRESHOLD = 10; %}@^[E)
#/aWGx_
/* j JW0a\0
* (non-Javadoc) ^U52 *6
* S}>rsg!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B}vI<?c
*/ i<l)To-
public void sort(int[] data) { g$ h!:wW
int[] temp=new int[data.length]; X- zg
mergeSort(data,temp,0,data.length-1); _.j KcDf
} j%lW+[%
iVD9MHT4
private void mergeSort(int[] data, int[] temp, int l, int r) { ;fuy}q8@7
int i, j, k; hod|o1C&
int mid = (l + r) / 2; #8'%CUF*<8
if (l == r) OHB!ec6W
return; oD.f/hi0|
if ((mid - l) >= THRESHOLD) Fw|5A"9'a'
mergeSort(data, temp, l, mid); iS"rMgq
else x`$4
insertSort(data, l, mid - l + 1); U7OW)tUf
if ((r - mid) > THRESHOLD) ~ 60J
mergeSort(data, temp, mid + 1, r); )Aj~ xA
else %P?W^mI
insertSort(data, mid + 1, r - mid); `H\^#Zu
A&z
for (i = l; i <= mid; i++) { : "UBeo<Z
temp = data; Cu}Rq!9i
} `.n[G~*w~1
for (j = 1; j <= r - mid; j++) { E@?jsN7
temp[r - j + 1] = data[j + mid]; "`lRX
} # H4dmnV
int a = temp[l]; b747eR 7E
int b = temp[r]; lGxG$0`;;
for (i = l, j = r, k = l; k <= r; k++) { 46*?hA7@r(
if (a < b) { "kMpa]<c-6
data[k] = temp[i++]; bH&[O`vf
a = temp; #CM2FN:W
} else { h5F1mr1Sa
data[k] = temp[j--]; @+\OoOK<L
b = temp[j]; $v+g3+7
} e%8K A#DX
} 3o6N&bQ b
} Qq5)|m
^K3{6}]
/** Q?vGg{>
* @param data ifuVVFov
* @param l 8Y:bvs.j
* @param i C6GYhG]
*/ !x>P]j7A}Y
private void insertSort(int[] data, int start, int len) { +&|WC2#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zF{5!b
} srUpG&Bcx
} K{N#^L!
} KnlVZn[3t
} /<GygRs
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堆排序： GeE|&popO
B;^7Yu0,
package org.rut.util.algorithm.support; oSxHTbp?
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import org.rut.util.algorithm.SortUtil; p3X>
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/** !IP[C?(nB
* @author treeroot ^/c&Ud
* @since 2006-2-2 =8[HC}s|$
* @version 1.0 aVd{XVE
*/ ~W!sxM5(*
public class HeapSort implements SortUtil.Sort{ LTrn$k3}
1'M<{h<sP
/* (non-Javadoc) }nuhLt1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \07 s'W U
*/ V"gnG](2l
public void sort(int[] data) { Si!W@Jm
MaxHeap h=new MaxHeap(); \3x,)~m
h.init(data); 6Vi #O^>
for(int i=0;i h.remove(); iugTXZ(
System.arraycopy(h.queue,1,data,0,data.length); Z?X ^7<
} !DD|dVA{
B\9ymhx;g%
private static class MaxHeap{ 6:J @
xj(&EGY:
void init(int[] data){ \#
this.queue=new int[data.length+1]; ?$9C[Kw`
for(int i=0;i queue[++size]=data; co#%~KqMu
fixUp(size); Z{&PKS
} ^BW V6
} s\_ ,aI
RytQNwv3
private int size=0; qd"*Td
P5kkaLzG
private int[] queue; zS]Yd9;X1
B$aboL2
public int get() { !1;DRF
return queue[1]; az\;D\\
} V\^?V|
19h8p>Sx0
public void remove() { F(:+[$)
SortUtil.swap(queue,1,size--); ` Y"Rh[C
fixDown(1); "C%;9_ig$
} o^2.&e+dQ
file://fixdown %/jmQ6z^
private void fixDown(int k) { Fod2KS;g
int j; Jy{A1i@4~s
while ((j = k << 1) <= size) { >(p "!
if (j < size %26amp;%26amp; queue[j] j++; ~%m-}Sxc
if (queue[k]>queue[j]) file://不用交换 2 ES .)pQ
break; -TSn_XE
SortUtil.swap(queue,j,k); >cQ*qXI0
k = j; qbpvTTF
} O]90F
} USfOc
private void fixUp(int k) { Z'hW;^e%_z
while (k > 1) { BB>3Kj:|
int j = k >> 1; e=QnGT*b5
if (queue[j]>queue[k]) /\(0@To
break; mq do@
SortUtil.swap(queue,j,k); tNoo3&
k = j; /EA4-#uw
} =&< s*-l[
} &CG3_s<2
\@3i=!
} +kmPQdO;*/
?&j[Rj0pH
} JstX# z
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SortUtil： 0'%R@|
[_#9PH33
package org.rut.util.algorithm; O\-cLI<h2
48Z{wV,
import org.rut.util.algorithm.support.BubbleSort; kbOdg:
import org.rut.util.algorithm.support.HeapSort; LEKN%2
import org.rut.util.algorithm.support.ImprovedMergeSort; WEZ(4ah
import org.rut.util.algorithm.support.ImprovedQuickSort; s'J8E+&5
import org.rut.util.algorithm.support.InsertSort; `b+f^6SJn
import org.rut.util.algorithm.support.MergeSort; Q9]7.^l
import org.rut.util.algorithm.support.QuickSort; <G/O!02
import org.rut.util.algorithm.support.SelectionSort; eOE7A'X
import org.rut.util.algorithm.support.ShellSort; P BpjE}[Q
`[2nxP>w`
/** H'P1EZtq
* @author treeroot z<hy#BIjnd
* @since 2006-2-2 [}N?'foLb
* @version 1.0 ]+{Cy\*kR
*/ bo4 :|Z
public class SortUtil { ebcGdC/%>
public final static int INSERT = 1; cL7je
public final static int BUBBLE = 2; p9y "0A|
public final static int SELECTION = 3; {|O8)bW'
public final static int SHELL = 4; _A;jtS)SY
public final static int QUICK = 5; l%oie1g l
public final static int IMPROVED_QUICK = 6; ]Jq1b210
public final static int MERGE = 7; eh&?BP?
public final static int IMPROVED_MERGE = 8; mTwz&N\
public final static int HEAP = 9; %e+hM $Q
~6Vs>E4G
public static void sort(int[] data) { b`usRoD{+
sort(data, IMPROVED_QUICK); g>CF|Wj
} i-vhX4:bd
private static String[] name={ x~?,Wv|cm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x@;XyQq
}; =\eM -"r
!-m(1
private static Sort[] impl=new Sort[]{ ;@Alr?y
new InsertSort(), MMN2XxS
new BubbleSort(), bW7tJ
new SelectionSort(), {+0]diD
new ShellSort(), ICN>8|O`&
new QuickSort(), }3!83~Qbx
new ImprovedQuickSort(), s*>s;S?{|
new MergeSort(), *!ZU"q}i
new ImprovedMergeSort(), k3da*vwE
new HeapSort() ><mZOTn e;
}; TxoMCN?7c
be|k"s|6)
public static String toString(int algorithm){ xa[<k>r3
return name[algorithm-1]; (_^g:>)Cs
} hc4<`W{
b'pbf
public static void sort(int[] data, int algorithm) { S#8wnHq
impl[algorithm-1].sort(data); Xai ,
} CS)&A4`8
/JaH
public static interface Sort { %M2.h;9]*\
public void sort(int[] data); 2l}FOdq
} v7&e,:r2E@
|"8Az0[!
public static void swap(int[] data, int i, int j) { $W<H[k&(B
int temp = data; tO~DA>R
data = data[j]; M}k )Ep9
data[j] = temp; mL?9AxO
} <N}UwB&
} "WdGY*r