[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; `lV
} 9FIe W[
int i1=l; ~T p8>bmSR
int i2=mid+1; f>"!-3
for(int cur=l;cur<=r;cur++){ :<WQ;q
if(i1==mid+1) I!soV0VU]
data[cur]=temp[i2++]; :+?W
else if(i2>r) yjM@/b
data[cur]=temp[i1++]; vS24;:f
else if(temp[i1] data[cur]=temp[i1++]; *]E7}bqb
else a|6x!p2X
data[cur]=temp[i2++]; TJ%]{%F
} q|]0on~]
} foP>w4pB
U_ ?elz\
} ,SE$Rh
/v;)H#;
改进后的归并排序: #ejw@bd
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package org.rut.util.algorithm.support; +DbWMm
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import org.rut.util.algorithm.SortUtil; sP3.s_U^
_WjETyh [H
/** Uf2v$Jl+Yh
* @author treeroot L->f= 8L
* @since 2006-2-2 6E\\`FE4y
* @version 1.0 _c(C;s3o
*/ BJ.8OU*9]S
public class ImprovedMergeSort implements SortUtil.Sort { h<^:Nn
U<,Kw6K
private static final int THRESHOLD = 10; rO?x/{;ai
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/* +GPT:\*q6
* (non-Javadoc) ,;=( )-
* ;MRC~F=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;~gd<KK
*/ jcv1z v.
public void sort(int[] data) { BtNW5'^
int[] temp=new int[data.length]; QSs$
mergeSort(data,temp,0,data.length-1); TXh@
} KZ<RDXVT
j~L1~@
private void mergeSort(int[] data, int[] temp, int l, int r) { %[\Ft
int i, j, k; x 1xj\O
int mid = (l + r) / 2; $qUta<o2@
if (l == r) \gI:`>- x
return; &6^W%r
if ((mid - l) >= THRESHOLD) :2UC{_
mergeSort(data, temp, l, mid); b-(UsY:
else &fd4IO/O
insertSort(data, l, mid - l + 1); FskJyB[
if ((r - mid) > THRESHOLD) >eG&gc@$1$
mergeSort(data, temp, mid + 1, r); QY\wQjwuW
else D>7_P7]y
insertSort(data, mid + 1, r - mid); l;Wy,?p
,<P[CUD&&
for (i = l; i <= mid; i++) { *A1TDc$
temp = data; }jY[| >z
} #!d^3iB2
for (j = 1; j <= r - mid; j++) { R$;&O. 5M
temp[r - j + 1] = data[j + mid]; YT(1 "{:
} 9X{nJ"
int a = temp[l]; UK<DcM~n
int b = temp[r]; L5k>;|SA
for (i = l, j = r, k = l; k <= r; k++) { (8-lDoW
if (a < b) { c>i*HN}Z|
data[k] = temp[i++]; `7qp\vYL
a = temp; r?yJ
} else { ;Y|~!%2~
data[k] = temp[j--]; t|U2ws#
b = temp[j]; QH' [(
} n\"LN3
} 7" STS7_
} {|J2clL
} Ved
/** :%b2;&A[
* @param data JTh=JHJ
* @param l z vylL M
* @param i U1HD~
*/ 1DlcO>#@
private void insertSort(int[] data, int start, int len) { V-ouIqnI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ExP25T
} j]l}K*8(
} FeeWZe0i
} )< a8a@
} aCi^^}!
pn%|;
堆排序： TX [%s@C
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package org.rut.util.algorithm.support; -b>O4_N
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import org.rut.util.algorithm.SortUtil; NDa|.,
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/** 8~Hs3\Hp
* @author treeroot 'kg]|"M
* @since 2006-2-2 S}[:;p?F`
* @version 1.0 (DMnwqr
*/ hUhp2ibEs
public class HeapSort implements SortUtil.Sort{ j% USu+&
8(/f!~
/* (non-Javadoc) = 4WZr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kmr 4cU5
*/ PM<LR?PLc
public void sort(int[] data) { U4L=3T+:[
MaxHeap h=new MaxHeap(); Qp{-!*
h.init(data); 6ym)F!t8l
for(int i=0;i h.remove(); |wb(rua
System.arraycopy(h.queue,1,data,0,data.length); ?| LB:8
} s1\BjSzk
MHyl=5
private static class MaxHeap{ 9c %Tv
^t ldm7{_
void init(int[] data){ Bpo68%dx89
this.queue=new int[data.length+1]; Cl.T'A$
for(int i=0;i queue[++size]=data; |j}F$*SE[
fixUp(size); J$/BH\
} wBHDof xX
} [gdPHXs
BI^]juH-c
private int size=0; Uu:v4a
jL%}y1m?
private int[] queue; 5_C#_=E
5t#]lg[06'
public int get() { GXlg%
return queue[1]; /P"\+Qp
} :QL p`s
pvUoed\
public void remove() { :Sn3|`HDm
SortUtil.swap(queue,1,size--); >@Vr'kg+V
fixDown(1); [=F |^KL
} Jo$Dxa z
file://fixdown ;/q6^Nk3A
private void fixDown(int k) { 6%INNIyAWa
int j; }Q^a.`h
while ((j = k << 1) <= size) { *>$)#?t
if (j < size %26amp;%26amp; queue[j] j++; &p4<@k\L
if (queue[k]>queue[j]) file://不用交换 AX RNV
break; G5f57F
SortUtil.swap(queue,j,k); _:p_#3s$
k = j; }Y ];ccT
} tRBK1h
} l'%R^
private void fixUp(int k) { ^|;4/=bbs
while (k > 1) { '0$[Ujc
int j = k >> 1; }F`2$Q+CW
if (queue[j]>queue[k]) W*`6ero
break; pDq_nx9
SortUtil.swap(queue,j,k); &E`Z_}~
k = j; "$pgmf2
} U?j>28
} K.1yncS^
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} (b}7Yb]#c
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} O~'yP@&`
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SortUtil： bu&y w~
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package org.rut.util.algorithm; $-fY8V3[
1ZFSz{
import org.rut.util.algorithm.support.BubbleSort; E"&9FxS]^
import org.rut.util.algorithm.support.HeapSort; jUSr t)o03
import org.rut.util.algorithm.support.ImprovedMergeSort; >!.9g
import org.rut.util.algorithm.support.ImprovedQuickSort; |bnjC$b*
import org.rut.util.algorithm.support.InsertSort; XqH<)B ]
import org.rut.util.algorithm.support.MergeSort; AK?j1Pk
import org.rut.util.algorithm.support.QuickSort; xU<lv{m`D
import org.rut.util.algorithm.support.SelectionSort; 7zZ|=W?&{
import org.rut.util.algorithm.support.ShellSort; : X|7l?{xW
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/** qJt gnk|
* @author treeroot |UO;StF
* @since 2006-2-2 lFY8^#@
* @version 1.0 A'(F%0NF6
*/ gSYX@'Q!
public class SortUtil { h18y?e7MU
public final static int INSERT = 1; U/o}{,$A
public final static int BUBBLE = 2; Nb/%>3O@
public final static int SELECTION = 3; i]?xM2(N
public final static int SHELL = 4; Rj`Y X0?+
public final static int QUICK = 5; S`w)b'B!M
public final static int IMPROVED_QUICK = 6; !PIdw~YC
public final static int MERGE = 7; <j3HT"^[D
public final static int IMPROVED_MERGE = 8; ye2Oh7
public final static int HEAP = 9; )1 j2
M6#(F7hB
public static void sort(int[] data) { 0M+tKFb
sort(data, IMPROVED_QUICK); In M'zAhb
} %([H*sLX
private static String[] name={ rapca'&#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jpv,0(
}; cSk}53
", )
private static Sort[] impl=new Sort[]{ mDfWR
new InsertSort(), cpnwx1q@
new BubbleSort(), ,m]q+7E
new SelectionSort(), X-FHJ4
new ShellSort(), #?6RoFgMe
new QuickSort(), ]!:Y]VYN)\
new ImprovedQuickSort(), rtE,SN
new MergeSort(), x)L@xQ
new ImprovedMergeSort(), IyP].g1"U
new HeapSort() X&Lt?e,&
}; J[wXG6M
NLY5L7
public static String toString(int algorithm){ u`|fmVI
return name[algorithm-1]; \]%U?`A
} Y&:i^k
3/FB>w gt
public static void sort(int[] data, int algorithm) { oD\+ 5[x
impl[algorithm-1].sort(data); @CF4:NNHw
} hhhO+D1(
e r$'c
public static interface Sort { GK&Dd"v
public void sort(int[] data); Dm#k-y
} p#2th`M:P1
Z-(HDn
public static void swap(int[] data, int i, int j) { P\e%8&_U/
int temp = data; >`'9V|1
data = data[j]; I#U44+c
data[j] = temp; :6V8
} Q>$L;1E*,
} ]EQ/*ct