[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; j65qIw_Z
} j`pX2S
int i1=l; :q,tmk h
int i2=mid+1; R@Kzdeo
for(int cur=l;cur<=r;cur++){ BT8L'qEj
if(i1==mid+1) >V1v.JH
data[cur]=temp[i2++]; Y6r<+#V
else if(i2>r) x=~$ik++
data[cur]=temp[i1++]; X23#y7:
else if(temp[i1] data[cur]=temp[i1++]; -VVJf5/
else %an&lcoX
data[cur]=temp[i2++]; N% W298
} Uc<j{U ,
} S eTn]
XAF*jevr
} qH1&tW$
E+xC1U 3
改进后的归并排序: NwPC9!*
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package org.rut.util.algorithm.support; hxQx$
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import org.rut.util.algorithm.SortUtil; 9C2DW,?
`;vJ\$-<
/** u>W:SM
* @author treeroot |E#+X
* @since 2006-2-2 1so9w89
* @version 1.0 ;+-Dg3
*/ sF+Bu'9A
public class ImprovedMergeSort implements SortUtil.Sort { 5h6c W
y-i6StJ
private static final int THRESHOLD = 10; eW>Y*l%B
>wOqV!0<
/* e qzmEg
* (non-Javadoc) OX!<{9o
* =2rkaBFC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1?}5.*j<
*/ 6)_svtg
public void sort(int[] data) { ltH?Ew<]
int[] temp=new int[data.length]; ?ot7_vl
mergeSort(data,temp,0,data.length-1); 3!:?OUhx
} EiP#xjn?c
1o*eu&@
private void mergeSort(int[] data, int[] temp, int l, int r) { h~R= ?%H[
int i, j, k; a(BEm_l3
int mid = (l + r) / 2; M~jV"OF=
if (l == r) S%t*!
return; *[SOz)
if ((mid - l) >= THRESHOLD) PUJkC
mergeSort(data, temp, l, mid); 48 n5Y~YS
else { *&Wc Os
insertSort(data, l, mid - l + 1); y.PsC '
if ((r - mid) > THRESHOLD) rE[:j2HF
mergeSort(data, temp, mid + 1, r); i,z^#b7JQ
else $63_*9
insertSort(data, mid + 1, r - mid); aUTXg60l*
ta'{S=^j
for (i = l; i <= mid; i++) { 'W2B**}
temp = data; ?7]UbtW[
} =Mby;wQ?|
for (j = 1; j <= r - mid; j++) { ;Or]x?-
temp[r - j + 1] = data[j + mid]; q{:]D(
} nhZ^`mP
int a = temp[l]; v3q.,I_
int b = temp[r]; nS5g!GYY,k
for (i = l, j = r, k = l; k <= r; k++) { b|KlWt'
if (a < b) { xh) h#p.
data[k] = temp[i++]; nB .?=eUa
a = temp; <bbC&O\
} else { z +NwGVk3
data[k] = temp[j--]; jf WZLb)
b = temp[j]; ;[,r./XmH
} ,K>q{H^
} 4[o/p8*/
} cU
c?H@HoF
/** 6myF! H=
* @param data (n+FEE<
* @param l @3_[NI%
* @param i jMV9r-{*+
*/ -Y=o
private void insertSort(int[] data, int start, int len) { Qf:#{~/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9iy3 dy^
} Q`{2yU:r
} a2!;$B%
} |_GESpoHH
} fp`k1Uq@
XJI ff$K
堆排序： h:3^FV&#
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package org.rut.util.algorithm.support; B65"jy
~(~ y=M
import org.rut.util.algorithm.SortUtil; WPpS?
_ \LPP_
/** cq#=Vb
* @author treeroot &]_2tN=S$
* @since 2006-2-2 lv=rL
* @version 1.0 =(cfo_B@K
*/ 7(W"NF{r
public class HeapSort implements SortUtil.Sort{ snm1EPj
r 1x2)
/* (non-Javadoc) $FM:8^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A]_5O8<buW
*/ G%#M17
public void sort(int[] data) { 8`GN8F
MaxHeap h=new MaxHeap(); &RL j^A!
h.init(data); NB=!1;^J
for(int i=0;i h.remove(); 6 #m:=
System.arraycopy(h.queue,1,data,0,data.length); T_NN.Ol
} qvN`46c
aWTvowA
private static class MaxHeap{ Hph$Z1{
k0^t$J W
void init(int[] data){ X7Z=@d(
this.queue=new int[data.length+1]; lVra&5
for(int i=0;i queue[++size]=data; p/WE[8U
fixUp(size); N*NGC!p`N
} $z[r(a^a
} kX8Ey
L+N;mI8
private int size=0; 5`QN<4?%
dc=~EG-_rM
private int[] queue; >tQ$V<YB
57`*5X
public int get() { YU6D;
return queue[1]; 9J4gDw4<
} ]~d!<x#+
#-{^={p"
public void remove() { $_orxu0W
SortUtil.swap(queue,1,size--); &(/QJ`*8
fixDown(1); mF`%Z~}b
} ';iLk[
file://fixdown gH<A.5 xy
private void fixDown(int k) { ^P~NE#p5
int j; eH' J
while ((j = k << 1) <= size) { FwaYp\z
if (j < size %26amp;%26amp; queue[j] j++; yD:}&!\}
if (queue[k]>queue[j]) file://不用交换 t1rAS.z&
break; + X0db
SortUtil.swap(queue,j,k); -hpC8YS
k = j; 0Ma3
} KnxK9
} W>cHZ. _
private void fixUp(int k) { m$!Ex}2
while (k > 1) { s_RUb
int j = k >> 1; rOA{8)jIa*
if (queue[j]>queue[k]) Ds@nuQ
break; C]GW u~QF
SortUtil.swap(queue,j,k); -![>aqWmj1
k = j; </-aG[Fi
} a"bael
} #.W^7}H
?f&O4H
} gv}J"anD
}Jm~b9j
} %z"${ zw
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SortUtil： +5xk6RP
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package org.rut.util.algorithm; (>M? iB
Gq0Q}[53
import org.rut.util.algorithm.support.BubbleSort; I|/\L|vo
import org.rut.util.algorithm.support.HeapSort; _4-UM2o;
import org.rut.util.algorithm.support.ImprovedMergeSort; ;!Q}g19C
import org.rut.util.algorithm.support.ImprovedQuickSort; kDWMget$
import org.rut.util.algorithm.support.InsertSort; /j$`Cq3I
import org.rut.util.algorithm.support.MergeSort; 'd |*n#Dqc
import org.rut.util.algorithm.support.QuickSort; }+dDGFk
import org.rut.util.algorithm.support.SelectionSort; *9)yN[w
import org.rut.util.algorithm.support.ShellSort; !v68`l15
(y!V0iy]
/** ds "N*\.
* @author treeroot 9D,/SZ-v
* @since 2006-2-2 rJw Ws
* @version 1.0 U])$#/ v
*/ vHM,_I{
public class SortUtil { s~n@|m9k
public final static int INSERT = 1; 4ztU) 1
public final static int BUBBLE = 2; \Jm^XXgS
public final static int SELECTION = 3; >})W5Y+
public final static int SHELL = 4; z 8y.@<6
public final static int QUICK = 5; y41,T&ja
public final static int IMPROVED_QUICK = 6; 5Zy%Nam'gN
public final static int MERGE = 7; W+`T:Mgh
public final static int IMPROVED_MERGE = 8; $c1xh.
public final static int HEAP = 9; =kDh:&u%
+Vw]DLWR
public static void sort(int[] data) { Y |'}VU
sort(data, IMPROVED_QUICK); M=#'+CF}W
} CA]u3bf~
private static String[] name={ 2kW*Z7@D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A| s\5"??
}; ;nbbKQ]u
G'0JK+=o
private static Sort[] impl=new Sort[]{ s~g0VNu Y
new InsertSort(), i>{.Y};
new BubbleSort(), [|tlTk
new SelectionSort(), #H-EOXy
new ShellSort(), kJk6lPSqi7
new QuickSort(), b<8,'QgB
new ImprovedQuickSort(), "pTU&He
new MergeSort(), ),5|Ves;t[
new ImprovedMergeSort(), cg).b?g
new HeapSort() &at>sQ'
}; ]%eyrbU
|h^]`= 3
public static String toString(int algorithm){ >eucQ]
return name[algorithm-1]; ,HECHA_"
} a2SXg A
:]uz0s`>
public static void sort(int[] data, int algorithm) { RI&V:1
impl[algorithm-1].sort(data); K %.>o
} XkEE55#>|
jSdW?IH
public static interface Sort { 3F?_{A
public void sort(int[] data); !~fy".|x
} 6YF<GF{
nl+8C}=u
public static void swap(int[] data, int i, int j) { 'tn-o
int temp = data; /4{IxQk
data = data[j]; vu|-}v?:
data[j] = temp; -h%1rw
} /j"aOLL|
} x9i^_3Z