[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; L? DlR hu
} Cjr]l!
int i1=l; }x`Cnn
int i2=mid+1; @@H_3!B%4v
for(int cur=l;cur<=r;cur++){ B4RrUA32
if(i1==mid+1) PM[_0b
data[cur]=temp[i2++]; |-}.Y(y
else if(i2>r) \)No?fB
data[cur]=temp[i1++]; H%@f ^
else if(temp[i1] data[cur]=temp[i1++]; 5OI.Ka
else B1)Eo2i#
data[cur]=temp[i2++]; Fb(@i
} _x<NGIz
} g77M5(ME
sQ#e 2
} hz4?ku
9y*] {IY
改进后的归并排序: dYrgL3'
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package org.rut.util.algorithm.support; C*b[J
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import org.rut.util.algorithm.SortUtil; X6G{.Vh"
]qT&6:;-]
/** U<w8jVE
* @author treeroot HKrENk
* @since 2006-2-2 s;9Du|0f^
* @version 1.0 =4eJ@EVM
*/ 6P{^j
public class ImprovedMergeSort implements SortUtil.Sort { ?Tc#[B
E)$>t}$
private static final int THRESHOLD = 10; *I(6hB
Mqd'XU0L
/* />S^`KSTM
* (non-Javadoc) -j3Lgm
* CK7([>2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HJAiQ[m5s
*/ 0qJ (RB
public void sort(int[] data) { :>fT=$i@
int[] temp=new int[data.length]; =:s`C,l.4
mergeSort(data,temp,0,data.length-1); US ALoe
} ;nBf
Y.Zd_,qy
private void mergeSort(int[] data, int[] temp, int l, int r) { |&=-Nm
int i, j, k; <l5i%?
int mid = (l + r) / 2; =tP9n;D
if (l == r) nv:Qd\UM
return; T%eBgseS
if ((mid - l) >= THRESHOLD) JI-i7P
mergeSort(data, temp, l, mid); cpjwc@UMe
else G{} 2"/
insertSort(data, l, mid - l + 1); bXnUz?1!d
if ((r - mid) > THRESHOLD) UUV5uDe>i
mergeSort(data, temp, mid + 1, r); F<I*?${[
else ;98&5X\u<
insertSort(data, mid + 1, r - mid); [nO3%7t@
$K^l=X
for (i = l; i <= mid; i++) { #h[>RtP:
temp = data; (I}owr5:
} eK:?~BI!
for (j = 1; j <= r - mid; j++) { #-'`Ybw
temp[r - j + 1] = data[j + mid]; ,-e}Xw9
} GGuU(sL*
int a = temp[l]; py'vD3Q
int b = temp[r]; Gw<D'b)!
for (i = l, j = r, k = l; k <= r; k++) { !l $d^y345
if (a < b) { w{W+WJ
data[k] = temp[i++]; P5<9;PPbZ
a = temp; A O:F*%Q u
} else { c#N4XsG,
data[k] = temp[j--]; lr>NG,N
b = temp[j]; f(|k0$EIu
} d&NnpjH}c
} ynIC (t
} Q ]CMm2L^f
@njNP^'Kx
/** "u^Erj# /
* @param data Nu"v .]Y2
* @param l |eu8;~A
* @param i ytIPY7E
*/ 0~ho/_
private void insertSort(int[] data, int start, int len) { o`S``?`^)^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PeIx41. +s
} f]/2uUsg%
} {1SsHir>
} S&!(h {O
} jKml:)k
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堆排序： ev$:7}h=
F\DiT|?}
package org.rut.util.algorithm.support; VP#KoX85
U*C^g}iA
import org.rut.util.algorithm.SortUtil; d0 )725Ia
zIrOMh
/** nc;eNB
* @author treeroot C1D:Xi-
* @since 2006-2-2 y47N(;vy
* @version 1.0 \V$qAfP)
*/ _Xd"'cXw
public class HeapSort implements SortUtil.Sort{ \}jA1oy
3*h"B$g!
/* (non-Javadoc) lJdBUoO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (fF8)4l
*/ wo0j/4o
public void sort(int[] data) { O^MI073Q>t
MaxHeap h=new MaxHeap(); \t!~s^Oox
h.init(data); ,JZ>)(@)
for(int i=0;i h.remove(); AO7[SHDZ
System.arraycopy(h.queue,1,data,0,data.length); #'Y lO-C
} oy8jc];SO
`> %QCc\
private static class MaxHeap{ gE6'A
Ar!0GwE+
void init(int[] data){ t%Jk3W/f
this.queue=new int[data.length+1]; w7@`:W
for(int i=0;i queue[++size]=data; N#ggT9>X
fixUp(size); i3w~&y-
} ^{uHph9ny
} QJ XP-
<<0sv9qw1
private int size=0; \\k=N(n
+Hu\b&g
private int[] queue; G3DgB!
ov_l)vt
public int get() { G`FYEmD
return queue[1]; I}_}VSG(
} BY~Tc5
vIRT$W' O}
public void remove() { fxd+0R;f
SortUtil.swap(queue,1,size--); '[WL8,.Q
fixDown(1); 9f! M1
} vxmX5.
file://fixdown -0^]:
private void fixDown(int k) { g=t`3X#d
int j; v'i'I/
while ((j = k << 1) <= size) { KZ%i&w#<
if (j < size %26amp;%26amp; queue[j] j++; |]9@JdmV
if (queue[k]>queue[j]) file://不用交换 T01Iu
break; OIPY,cj~
SortUtil.swap(queue,j,k); u!K1K3T6k
k = j; FoetP`
} 01'>[h#_n
} 8s)b[Z5
private void fixUp(int k) { ]CzK{-W
while (k > 1) { u#Ig!7iUu
int j = k >> 1; zr|DC] 3
if (queue[j]>queue[k]) I>;{BYPV
break; yJI~{VmU7
SortUtil.swap(queue,j,k); JdS,s5Z>
k = j; R;!,(l
} !mxH/{+|n
} BEOPZ[Q|c
hWy@?r.
} +cH>'OXoB
n<C] 6H
} <L]Gk]k_R
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SortUtil： TaRPMKk
VW\S>=O99
package org.rut.util.algorithm; b$b;^nly
bA)nWWSg=
import org.rut.util.algorithm.support.BubbleSort; [OCjYC`
import org.rut.util.algorithm.support.HeapSort; e{E\YEc
import org.rut.util.algorithm.support.ImprovedMergeSort; 2fTuIS<yr
import org.rut.util.algorithm.support.ImprovedQuickSort; 86=W}eV1r
import org.rut.util.algorithm.support.InsertSort; blQ&QQL
import org.rut.util.algorithm.support.MergeSort; i%FC lMF
import org.rut.util.algorithm.support.QuickSort; MDF_Xr-hZ
import org.rut.util.algorithm.support.SelectionSort; O(/~cQ
import org.rut.util.algorithm.support.ShellSort; KA?}o^-F
86{>X5+
/** j,i9,oF6]
* @author treeroot vxZ'-&;t
* @since 2006-2-2 *:n7B\.
* @version 1.0 f]r*;YEc4
*/ u ]"fwkL
public class SortUtil { 67(s\
public final static int INSERT = 1; }.A]=Ew
public final static int BUBBLE = 2; V*@aE
public final static int SELECTION = 3; JN/=x2n.
public final static int SHELL = 4; UfX~GC;B
public final static int QUICK = 5; DC h !Z{I
public final static int IMPROVED_QUICK = 6; X<,QSTP
public final static int MERGE = 7; }[akj8U
public final static int IMPROVED_MERGE = 8; #KiJ{w'
public final static int HEAP = 9; gO8d2?Oh
BzfR8mD
public static void sort(int[] data) { BaQyn 6B
sort(data, IMPROVED_QUICK); E4% -*n
} 5f7id7SI
private static String[] name={ [\W&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Oo :Dt~Ib
}; M[`[+5v
A&M_ J
private static Sort[] impl=new Sort[]{ _3aE]\O[
new InsertSort(), Ca0sm
new BubbleSort(), `$/a-K}
new SelectionSort(), 2jyWkAP'
new ShellSort(), f0H.$UAL
new QuickSort(), VNTbjn]
new ImprovedQuickSort(), v7"VH90`!
new MergeSort(), 56)!&MF
new ImprovedMergeSort(), +E</A:|}S
new HeapSort() x[58C+
}; nz3*s#k\-
~s+vJvWz
public static String toString(int algorithm){ )7& -DI1
return name[algorithm-1]; &#e;`(*
} bW=q G
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public static void sort(int[] data, int algorithm) { 4z(~)#'^
impl[algorithm-1].sort(data); Ss%Cf6qdWL
} g)#?$OhP"
dM;\)jm
public static interface Sort { oE+P=
public void sort(int[] data); AAQ!8!
} \}Am]Y/ w
OWibmX
public static void swap(int[] data, int i, int j) { ms0V1`
int temp = data; ycBgr,Ynu<
data = data[j]; 0;l~B
data[j] = temp; h}a}HabA
} 3WP\MM
} RFRXOyGz$