[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; N7;kWQH
} @TzUcE
int i1=l; zMO xJ
int i2=mid+1; ]2[\E~^KU
for(int cur=l;cur<=r;cur++){ B.gEV*@
if(i1==mid+1) CT<z1)#@^
data[cur]=temp[i2++]; " #U-*Z7
else if(i2>r) 'P%&*%
data[cur]=temp[i1++]; wx2 z9Q
else if(temp[i1] data[cur]=temp[i1++]; byZj7q5&Q
else X|R"8cJ
data[cur]=temp[i2++]; ]RF(0;
} r -uu`=,
} D<*)^^
Q7mikg=1-
} ZA'0q
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改进后的归并排序: 'loko#6
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package org.rut.util.algorithm.support; Gxt6]+r
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import org.rut.util.algorithm.SortUtil; X7MA>j3m
T@n};,SQ
/** gN<J0c)
* @author treeroot Scmew
* @since 2006-2-2 /-=h|A#Kh
* @version 1.0 V.ae 5@;
*/ HisH\z/i5)
public class ImprovedMergeSort implements SortUtil.Sort { Enp;-wG:-
7--E$!9O,
private static final int THRESHOLD = 10; h6tYy_(G
tC7 4=
/* =>GGeEL
* (non-Javadoc) tS,AS,vy]
* 8N`Rf;BM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <DEu]-'>
*/ $bZ5@)E
public void sort(int[] data) { *I k/Vu%;
int[] temp=new int[data.length]; |"eC0u
mergeSort(data,temp,0,data.length-1); :G5O_T$
} e&Z ?I2J
w@,v$4Oi
private void mergeSort(int[] data, int[] temp, int l, int r) { mZjP;6
int i, j, k; b$`/f:_
int mid = (l + r) / 2; UcB2Aauji
if (l == r) w+XwPpM0.n
return; [o 6
if ((mid - l) >= THRESHOLD) J@ 8OU
mergeSort(data, temp, l, mid); g}*p(Tp9:
else )k4&S{=
insertSort(data, l, mid - l + 1); ~!/agLwY
if ((r - mid) > THRESHOLD) ?H8dyQ5"
mergeSort(data, temp, mid + 1, r); ]tmMk7
else veS) j?4
insertSort(data, mid + 1, r - mid); "R% RI( y{
xhMAWFg|
for (i = l; i <= mid; i++) { $ao7pvU6
temp = data; f{{J_""?&
} MK!Aq^Jz
for (j = 1; j <= r - mid; j++) { L#!m|_Mz
temp[r - j + 1] = data[j + mid]; }%0X7'
} ._&SS,I5VZ
int a = temp[l]; ++=jh6
int b = temp[r]; Rq|]KAN
for (i = l, j = r, k = l; k <= r; k++) { y%<CkgZS
if (a < b) { NA#,q 8
data[k] = temp[i++]; ZRFHs>0
a = temp; 1_M}Dc+J
} else { [4;G^{ bX
data[k] = temp[j--]; 6DC+8I<
b = temp[j]; Mh}vr%0;)
} YuoIhT
} `9acR>00$
} <2OXXQ1
v:NQrN
/** ?5j~"
* @param data U~oGg$
* @param l ##OCfCW
* @param i R|_._Btu!
*/ ylQ9Su>o
private void insertSort(int[] data, int start, int len) { A}_pJH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pxW*kS
} ?0lz!Nq'S
} P4 #j;k4P
} lA4TWU (]
} EWOa2^%}Z\
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堆排序： WDt6{5T
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package org.rut.util.algorithm.support; +/hd;s$x
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import org.rut.util.algorithm.SortUtil; y43ha
v <OZ # L$
/** a`LkP%
* @author treeroot D?4bp'0 3
* @since 2006-2-2 4EaxU !BT
* @version 1.0 .sKfwcYu4
*/ /+m2|Ij(
public class HeapSort implements SortUtil.Sort{ pv"s!q&
|AS<I4+&
/* (non-Javadoc) f{P?|8u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]oC"gWDYu
*/ !w;/J^
public void sort(int[] data) { [c v!YE
MaxHeap h=new MaxHeap(); -TS,~`O
h.init(data); 8fPTxvXqL
for(int i=0;i h.remove(); >oC{YYcK
System.arraycopy(h.queue,1,data,0,data.length); `O0y8
} d;{k,rP6
O9AFQ)u
private static class MaxHeap{ Ep3I*bQ Y
aS~~*UHW
void init(int[] data){ [*@ +
this.queue=new int[data.length+1]; eDvh3Y<D
for(int i=0;i queue[++size]=data; }^^c/w_
fixUp(size); flOXV
} ]kF1~kXBe
} J5Ti@(G5V
FOjX,@x&
private int size=0; n+nZ;GJ5d
iU(B#ohW"
private int[] queue; @ 'U`a4
6Xbf3So
public int get() { ]ZNFrpq
return queue[1]; Q8$;##hzt
} {uJ"%
SIc~cZ!Yu
public void remove() { _/Ay$l;F
SortUtil.swap(queue,1,size--); `g0^W/j
fixDown(1); k(_OhV_
} DhD##5a
file://fixdown <5}j(jxz}
private void fixDown(int k) { : t/0
int j; aX Ie
while ((j = k << 1) <= size) { xC}'"``s
if (j < size %26amp;%26amp; queue[j] j++; gAf4wq
if (queue[k]>queue[j]) file://不用交换 !T 9CpIM%
break; 8~&=vc
SortUtil.swap(queue,j,k); 6?[SlPPE1
k = j; ,LDL%<7t
} @Bn4ZFB@
} m;L3c(r.
private void fixUp(int k) { 7xYz9r)w`
while (k > 1) { )g}G{9M^
int j = k >> 1; h0I5zQZm
if (queue[j]>queue[k]) "yj_v\@4
break; eC L_c>3!
SortUtil.swap(queue,j,k); $RUK<JN$6
k = j; u! dx+vd
} ^Y5I OX:
} MH0wpHz
qVH.I6)
} (]PH2<3t
;' H\s
} D0z[h(m
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SortUtil： W=OryEV?
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package org.rut.util.algorithm; 0)ZLdF_6
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import org.rut.util.algorithm.support.BubbleSort; iSg0X8J)
import org.rut.util.algorithm.support.HeapSort; Q{an[9To~P
import org.rut.util.algorithm.support.ImprovedMergeSort; T8x8TN"
import org.rut.util.algorithm.support.ImprovedQuickSort; 1kR. .p<"
import org.rut.util.algorithm.support.InsertSort; {-f%g-@L6|
import org.rut.util.algorithm.support.MergeSort; eKZS_Qd
import org.rut.util.algorithm.support.QuickSort; C[d1n#@r
import org.rut.util.algorithm.support.SelectionSort; ]>%2,+5
import org.rut.util.algorithm.support.ShellSort; 3i'01z
VL'wrgk
/** WWo"De@
* @author treeroot e,lLHg
* @since 2006-2-2 ]E'?#z.t
* @version 1.0 !nlr!+(fV
*/ xEeHQ7J
public class SortUtil { 7AWq3i{
public final static int INSERT = 1; A}&YK,$5ED
public final static int BUBBLE = 2; .rnT'""i<5
public final static int SELECTION = 3; rBy0hGx
public final static int SHELL = 4; Upcx@zJ
public final static int QUICK = 5; #,1z=/d.
public final static int IMPROVED_QUICK = 6; lNl.lI\t)y
public final static int MERGE = 7; %r*,m3d
public final static int IMPROVED_MERGE = 8; 0Ub'=`]5a
public final static int HEAP = 9; E> $_ $'
pZ3sp!
public static void sort(int[] data) { T<NOLfk66
sort(data, IMPROVED_QUICK); #f/4%|t:
} G6G-qqXy6
private static String[] name={ ]qu6/Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 65*Hf3~~
}; w{So(AF
Q1rEUbvCE
private static Sort[] impl=new Sort[]{ NL;sn"
new InsertSort(), `H$=hr
new BubbleSort(), n&zEYCSI
new SelectionSort(), _`p^B%[
new ShellSort(), _VTpfeL@n
new QuickSort(), MI(;0
new ImprovedQuickSort(), *[*q#b$j
new MergeSort(), %Lb cwh(9
new ImprovedMergeSort(), ]<L~f~vU
new HeapSort() g j]8/~lr
}; 5\w*W6y
<W)F{N?
public static String toString(int algorithm){ MNb9~kM
return name[algorithm-1]; x$D^Bh,
} 9yWf*s<
I,HtW),
public static void sort(int[] data, int algorithm) { e6 x#4YH
impl[algorithm-1].sort(data); *N:0L,8
} *+2_!=4V
@!O(%0 =
public static interface Sort { DT)][V^w
public void sort(int[] data); 8{ =ha
} ~(huUW
AXSip
public static void swap(int[] data, int i, int j) { ' i<4;=M&
int temp = data; Un,'a8>V`
data = data[j]; udIm}jRA"
data[j] = temp; n;$u%2t2
} s S#/JLDx]
} 3}&3{kt