[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~6K}g?
} }d<R 5
int i1=l; 7uF|Z(
int i2=mid+1; 7;s#QqG`I
for(int cur=l;cur<=r;cur++){ 5o#JHD
if(i1==mid+1) 7l D-|yx
data[cur]=temp[i2++]; `7CK;NeT
else if(i2>r) ,%M[$S'
data[cur]=temp[i1++]; T3X'73M
else if(temp[i1] data[cur]=temp[i1++]; Rff F:,b
else v $Iw?y
data[cur]=temp[i2++]; CMXF[X)%
} AcC &Q:g
} FACw;/rW
j3gDGw;
} 0zaK&]oY0
A&Y5z[p
改进后的归并排序: ;mkkaW,D*
x HRSzYn$
package org.rut.util.algorithm.support; bGPE0}b
7?$?Yu
import org.rut.util.algorithm.SortUtil; j/FLEsU!R
={qcDgn~C
/** eU[g@Pq:Y
* @author treeroot o*S_"
* @since 2006-2-2 \^x{NV@v42
* @version 1.0 xN1P#
*/ O G`8::S
public class ImprovedMergeSort implements SortUtil.Sort { ,/42^|=Z6O
/Mqhx_)>A
private static final int THRESHOLD = 10; `(e:H
/yOx=V
/* /wV|;D^ )
* (non-Javadoc) Cn{Hk)6
* l":W@R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ri.tA
*/ g7\=
public void sort(int[] data) { }LzBo\
int[] temp=new int[data.length]; JVZ-nHf(9
mergeSort(data,temp,0,data.length-1); ,_2-Op
} T5S4,.o9W
^*K=wE}AG
private void mergeSort(int[] data, int[] temp, int l, int r) { r|Ui1f5
int i, j, k; (}: s[cs
int mid = (l + r) / 2; P@{x@9kI
if (l == r) UUah5$Iy
return; i0vm00oT
if ((mid - l) >= THRESHOLD) ag-A}k>v
mergeSort(data, temp, l, mid); X8nos
else o NtFYY
insertSort(data, l, mid - l + 1); : T*Q2
if ((r - mid) > THRESHOLD) BOs/:ZbK0W
mergeSort(data, temp, mid + 1, r); "mlQ z4D)5
else KZm&sk=QM-
insertSort(data, mid + 1, r - mid); _yg_?GH
$Ome]+0
for (i = l; i <= mid; i++) { 2jsbg{QS#_
temp = data; *FlPGBjJ
} "6B7EH
for (j = 1; j <= r - mid; j++) { fz&B$1;8
temp[r - j + 1] = data[j + mid]; OQVrg2A%(
} %TB(E<p`
int a = temp[l]; I6>J.6luF9
int b = temp[r]; RK3yq$
for (i = l, j = r, k = l; k <= r; k++) { $l7^-SK`E
if (a < b) { 8Zv``t61
data[k] = temp[i++]; uqMw-f/
a = temp; $[gN#QW%
} else { Y'v[2s
data[k] = temp[j--]; ]lB zpD
b = temp[j]; /:{%X(8
} Cf{F"o
} $ghZ<Y2}9
} }3pM,.
dmFn0J-\
/** NYm"I`5w
* @param data k6G _c;V
* @param l T]#V
* @param i <`H0i*|Ued
*/ ll:UIxx
private void insertSort(int[] data, int start, int len) { 9d(\/ 7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h^M_yz-f
} bGRt
} qQ@| Cj
} WK~H]w
} hW^,' m
x7j#@C
堆排序： 9T,/R1N8
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package org.rut.util.algorithm.support; 0-. d{P
r*X,]\V0x
import org.rut.util.algorithm.SortUtil; `Q]N]mK
&Y@i:O
/** }X(&QZ7i`
* @author treeroot +mQ5\14#
* @since 2006-2-2 \2SbW7"/;P
* @version 1.0 m'4f'tbN
*/ rzjVUPdnh
public class HeapSort implements SortUtil.Sort{ qd`e:s*%
>lI7]hbIs
/* (non-Javadoc) {SoI;o_>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v4$/LUJZp
*/ UKS5{"=T[
public void sort(int[] data) { #c"eff
MaxHeap h=new MaxHeap(); d,<ni"
h.init(data); NBikYxa
for(int i=0;i h.remove(); RNg?o[S
System.arraycopy(h.queue,1,data,0,data.length); Lvk}%,S8t
} .sMs_ 5D
s**<=M GK
private static class MaxHeap{ 36d nS>4
j\>LJai"
void init(int[] data){ h2l;xt
this.queue=new int[data.length+1]; ~9X^3.nI
for(int i=0;i queue[++size]=data; @AyteHK
fixUp(size); \Mf>X\}
} /{M<FVXK+|
} YQVo7"`%
G6SgVaM
private int size=0; p/H.bG!z
?gH[la
private int[] queue; tUn>=>cWP
Z!p\=M,%
public int get() { TBlSZZ-55]
return queue[1]; rb*|0ST
} te_2"Z
`lf_wB+I
public void remove() { -,bFGTvYQ
SortUtil.swap(queue,1,size--); '&>"`q
fixDown(1); , X5.|9
} 1.hWgWDP
file://fixdown exRw, Nk4
private void fixDown(int k) { 7DB_Z/uU
int j; ,_z79tC{s
while ((j = k << 1) <= size) { {U4!sJSl1
if (j < size %26amp;%26amp; queue[j] j++; [KDxB>R<{
if (queue[k]>queue[j]) file://不用交换 `e[S Zj\
break; "*g+qll!5d
SortUtil.swap(queue,j,k); X/_I2X
k = j; W!Tx%
} m/HT3<F
} N?GTfN
private void fixUp(int k) { <-lM9}vd
while (k > 1) { 1wSAwpz
int j = k >> 1; \Z{tC$|H
if (queue[j]>queue[k]) uvys>]+
break; iP:i6U]
SortUtil.swap(queue,j,k); |vI*S5kn6A
k = j; KE?t?p
} ,'L>:pF3
} PyeNu3Il4
@"w4R6l+*
} CH++3i2&
*TOdIq&z
} C@M-_Ud>Q
8%rD/b6`
SortUtil： hpdI5
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package org.rut.util.algorithm; >e]g T
(;NJ<x
import org.rut.util.algorithm.support.BubbleSort; ''17(%
import org.rut.util.algorithm.support.HeapSort; woI5aee|
import org.rut.util.algorithm.support.ImprovedMergeSort; Ee>VA_ss
import org.rut.util.algorithm.support.ImprovedQuickSort; H MOIUd
import org.rut.util.algorithm.support.InsertSort; dSI"yz
import org.rut.util.algorithm.support.MergeSort; zzmC[,u}
import org.rut.util.algorithm.support.QuickSort; ~ |G&cg
import org.rut.util.algorithm.support.SelectionSort; lg%fjBY
import org.rut.util.algorithm.support.ShellSort; Vaxg
!-I,Dh-A
/** 4.A^5J'W
* @author treeroot q^X7x_
* @since 2006-2-2 w,|@e_|J
* @version 1.0 ns[/M~_r
*/ 3:nhZN/95T
public class SortUtil { 0KA*6]h t
public final static int INSERT = 1; mF~T?L"
public final static int BUBBLE = 2; %h.zkocM
public final static int SELECTION = 3; U~G7~L &m
public final static int SHELL = 4; g)Z8WH$;H3
public final static int QUICK = 5; q(sTKT[V
public final static int IMPROVED_QUICK = 6; i4D(8;
public final static int MERGE = 7; bpu`'Vx
public final static int IMPROVED_MERGE = 8; q<RjAi
public final static int HEAP = 9; )\wkVAm
PgtLyzc
public static void sort(int[] data) { Ku5||u.F4*
sort(data, IMPROVED_QUICK); sG g458
} Bwg(f_[1
private static String[] name={ uHbg&eW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v>X!/if<y
}; EEe$A?a;
]3r}>/2(
private static Sort[] impl=new Sort[]{ Upz)iOqLi
new InsertSort(), y4\X~5kU
new BubbleSort(), iSfRJ:_&6
new SelectionSort(), 44CZl{pt
new ShellSort(), [8ZDMe
new QuickSort(), jaS<*_~#R
new ImprovedQuickSort(), ammi4k/
new MergeSort(), fe .=Z&
new ImprovedMergeSort(), 5SFr E`
new HeapSort() }G4I9Py
}; "&L8d(ZuA
}:$cK(|
public static String toString(int algorithm){ ?;~!C2Zs
return name[algorithm-1]; N2:Hdu:
} XJul~"
14$%v;Su4
public static void sort(int[] data, int algorithm) { xd?=#d
impl[algorithm-1].sort(data); 5:PS74/
} Qt u;_
^[hAj>7_8$
public static interface Sort { *qpFtBg
public void sort(int[] data); n"iS[uj,
} <Bo\a3Z
b'4a;k!rS
public static void swap(int[] data, int i, int j) { @&T' h}|:
int temp = data; {7y;s
data = data[j]; \g0vzo"u
data[j] = temp; M)13'B.
} !vX4_!%
} ?NE/}?a