[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; _v(5vx_ {
} k!G{#(++&6
int i1=l; !? H:?
int i2=mid+1; J1w3g,
for(int cur=l;cur<=r;cur++){ |onLJY7)
if(i1==mid+1) Vk2%yw>
data[cur]=temp[i2++]; ]1eZ<le`6
else if(i2>r) Ups0Xg&{
data[cur]=temp[i1++]; e z_c;
else if(temp[i1] data[cur]=temp[i1++]; wp'[AR}
else n2:Uu>/
data[cur]=temp[i2++]; yMzy!b Ky
} \Ui8gDJ8y5
} BG)zkn$
_00}O+GLM4
} +Z-{6C
kM@e_YtpY
改进后的归并排序: 2Dt^W.!
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package org.rut.util.algorithm.support; >o%X;U 3
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import org.rut.util.algorithm.SortUtil; P: L6Zo-J
i3KAJ@
/** UtC<TBr
* @author treeroot _|4QrZ$n(
* @since 2006-2-2 u~VXe
* @version 1.0 +]GP"yv-
*/ d>T8V(Bb
public class ImprovedMergeSort implements SortUtil.Sort { 8G2QI4
st~l||
private static final int THRESHOLD = 10; `c|H^*RC
"=KFag
/* pAqPHD=
* (non-Javadoc) IP-M)_I
* ]&B/rSC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?R4u>AHS@
*/ 0v6Z4Ahpo
public void sort(int[] data) { TKbfZw
int[] temp=new int[data.length]; #;lEx'lKN
mergeSort(data,temp,0,data.length-1); {X<_Y<
} H3pZfdh?w
44t;#6p@%>
private void mergeSort(int[] data, int[] temp, int l, int r) { (CtRU
int i, j, k; X+HPdrT
int mid = (l + r) / 2; [3ggJcUgW>
if (l == r) T~SkFZ
return; W5()A,R
if ((mid - l) >= THRESHOLD) <lU(9) L;&
mergeSort(data, temp, l, mid); -UAMHd}4
else T-lP=KF=
insertSort(data, l, mid - l + 1); (lq%4h
if ((r - mid) > THRESHOLD) BT^=p
mergeSort(data, temp, mid + 1, r); l}T@Cgt
else ,J<+Wxz
insertSort(data, mid + 1, r - mid); MSp)Jc
SMU8U
for (i = l; i <= mid; i++) { FPZ@6
temp = data; JDp=w,7LF
} 3j[<nBsn.
for (j = 1; j <= r - mid; j++) { paYS<8In
temp[r - j + 1] = data[j + mid]; .b!HEi<F
} V`i(vC(
int a = temp[l]; E0aFHC[
int b = temp[r]; BLt_(S?Z`
for (i = l, j = r, k = l; k <= r; k++) { v}z^M_eFm
if (a < b) { jaVx9FR+
data[k] = temp[i++]; 6Bd:R}yZP7
a = temp; pN)>c,
} else { U+(qfa5(
data[k] = temp[j--]; C.H(aX)7
b = temp[j]; V' i@N
} rJtk4hOF
} ycEp,V;[Z
} V1,~GpNx
LJ9#!r@H
/** !wKNYe
* @param data YluvWHWi
* @param l .#K\u![@N
* @param i ]C|xo.=?]
*/ Pp4Q)2X
private void insertSort(int[] data, int start, int len) { j.V7`x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M?n}{0E4
} (9] =;)
} 9`@}KnvB?
} O-~cj7 0\
} Iu;VFa
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堆排序： ZLf(m35
8)b*q\O'
package org.rut.util.algorithm.support; o_ixdnc
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import org.rut.util.algorithm.SortUtil; h<WTN_i}
bZ+Hu~
/** 9IacZ
* @author treeroot Gq?>Bi;`
* @since 2006-2-2 hsI9{j]f
* @version 1.0 wqX!7rD/g)
*/ 92*"3)
public class HeapSort implements SortUtil.Sort{ #,!/Cnqis
w (ev=)7<
/* (non-Javadoc) >bO}sx1?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gA2]kZg
*/ _w%{yF6
public void sort(int[] data) { CzmB76zy.
MaxHeap h=new MaxHeap(); 99b"WH^3$y
h.init(data); S3c%</'
for(int i=0;i h.remove(); 9; aOUs:<
System.arraycopy(h.queue,1,data,0,data.length); H1vToIP%
} ^X:g C9
U/\LOIs
private static class MaxHeap{ -8t&&fIA
5&134!hC
void init(int[] data){ pJ@->V_
this.queue=new int[data.length+1]; B+ZhQW
for(int i=0;i queue[++size]=data; {iTA=\q2O
fixUp(size); In#m~nE[M
} okbW. ~
} .V l
!q^2| %
private int size=0; 4Jw_gOY&D
mnq1WU;<
private int[] queue; !L@a;L
qu/b:P
public int get() { T2XLP
return queue[1]; ;k,#o!>
} ?!n0N\|i]
p8E6_%Rw
public void remove() { :b(Nrj&TQ[
SortUtil.swap(queue,1,size--); m Wh
fixDown(1); ?T8^tGD[
} -W1Apd%>
file://fixdown a,?u 2
private void fixDown(int k) { p9*Ak U&]
int j; KhNOxMZ
while ((j = k << 1) <= size) { j\uPOn8k
if (j < size %26amp;%26amp; queue[j] j++; oP`Qyk
if (queue[k]>queue[j]) file://不用交换 u 9kh@0
break; vC-5_pl
SortUtil.swap(queue,j,k); l9F]Lw
k = j; Q;2n
} Uk0 0lPG.U
} 91}kBj
private void fixUp(int k) { VNxhv!w
while (k > 1) { '/<f'R^
int j = k >> 1; N=TDywRI
if (queue[j]>queue[k]) 42.y.LtZ
break; KqzQLu
SortUtil.swap(queue,j,k); Kbqx)E$iL
k = j; w72\'
} ?0'db
} U3M;6j9`
o=I.i>c
} YiTVy/
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} +o}mV.&1,
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SortUtil： fO 6Jug
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package org.rut.util.algorithm; rHD_sC*
3mLtnRX[m
import org.rut.util.algorithm.support.BubbleSort; 'zfj`aqc
import org.rut.util.algorithm.support.HeapSort; I+']av8e
import org.rut.util.algorithm.support.ImprovedMergeSort; G q2@37U
import org.rut.util.algorithm.support.ImprovedQuickSort; Ec l/2
import org.rut.util.algorithm.support.InsertSort; Q<fDtf}
import org.rut.util.algorithm.support.MergeSort; 8\$u/(DX
import org.rut.util.algorithm.support.QuickSort; HkdBPMs79
import org.rut.util.algorithm.support.SelectionSort; uN9J?j*ir
import org.rut.util.algorithm.support.ShellSort; gEkH5|*Y
%%hG],w
/** _?c7{
* @author treeroot "|<U`3y6
* @since 2006-2-2 T6I$7F
* @version 1.0 m-MfFEZ
*/ X.J$ 5b
public class SortUtil { ]r(s02
public final static int INSERT = 1; D> EN:_v
public final static int BUBBLE = 2; GVUZn//
public final static int SELECTION = 3; 9;`E,w
public final static int SHELL = 4; ,HtXD~N
public final static int QUICK = 5; LV`tnt's
public final static int IMPROVED_QUICK = 6; YzeNr*
public final static int MERGE = 7; rqz`F\A;%
public final static int IMPROVED_MERGE = 8; 91ndr@*|
public final static int HEAP = 9; ){$*<#&H
K%WG[p\Eu
public static void sort(int[] data) { GVld]ioycG
sort(data, IMPROVED_QUICK); l3HfaCP6:
} QpiA~4
private static String[] name={ JbLHW26pl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vMeB2r<
}; in#lpDa[
/#g P#Z%
private static Sort[] impl=new Sort[]{ D&!c7_^
new InsertSort(), ^~JF7u
new BubbleSort(), 8\Kpc;zb
new SelectionSort(), I T?~`vi
new ShellSort(), g1&>.V}!
new QuickSort(), fRomP-S
new ImprovedQuickSort(), e)*-<AGwC
new MergeSort(), h8hyQd$!
new ImprovedMergeSort(), ;2[o>73F
new HeapSort() \IO<V9^L
}; l-?#oy
e>g>)!F
public static String toString(int algorithm){ DLD5>
return name[algorithm-1]; UM:]QbaIn
} ErxvGB(2
~'w]%rh!
public static void sort(int[] data, int algorithm) { =hi{J M
impl[algorithm-1].sort(data); a[@Y>
} #T++5G
r-$VPW
public static interface Sort { ;*njS1@
public void sort(int[] data); YT}ZLx
} ([dJ'OPx$
:pvB}RYD
public static void swap(int[] data, int i, int j) { Q#zU0K*^
int temp = data; W<>R;~)
data = data[j]; uSUog+i
data[j] = temp; z-_$P)[c
} G124!^
} >f70-D28