[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; 0Rz",Mu>
} 1V;m8)RF
int i1=l; Rqun}v}
int i2=mid+1; P+(Ys[J3
for(int cur=l;cur<=r;cur++){ C''[[sw'K
if(i1==mid+1) Wq/0}W.
data[cur]=temp[i2++]; r=ht:+m
else if(i2>r) cE3V0voSw1
data[cur]=temp[i1++]; Y@'ahxF
else if(temp[i1] data[cur]=temp[i1++]; `E5vO1Pl
else KZI-/H+
data[cur]=temp[i2++]; k^Uk=)9
} ~.<}/GP]_
} p&cJo<]=LE
9I*i/fa
} !kWx'tJ$
q Qc-;|8
改进后的归并排序: ez^b{s`
8@BN6
package org.rut.util.algorithm.support; 6a*OQ{8
G/?j$T
import org.rut.util.algorithm.SortUtil; ka[%p,H
@^K_>s9B
/** [p 8fg!|
* @author treeroot d>jRw
* @since 2006-2-2 T`r\yl}
* @version 1.0 ZsL-vlv
*/ Q=.j>aM+_
public class ImprovedMergeSort implements SortUtil.Sort { -LMO f[v?
]tO9<
private static final int THRESHOLD = 10; GFO(O
#)28ESj
/* 0?\d%J!"S
* (non-Javadoc) /rmm@
* \I~9%QJ>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TDjjaO
*/ vV /fTO
public void sort(int[] data) { `yWWX.`
int[] temp=new int[data.length]; ^*+-0b;[G
mergeSort(data,temp,0,data.length-1); f*GdHUZ*
} S0-/9h
UZ3oc[#D=]
private void mergeSort(int[] data, int[] temp, int l, int r) { =]hPX
int i, j, k; e(;nhU3a*,
int mid = (l + r) / 2; I DtGtkF
if (l == r) \:d|'r8OCM
return; h2fTG
if ((mid - l) >= THRESHOLD) * 57y.](w
mergeSort(data, temp, l, mid); .LEn~ 8
else {-kV~p
insertSort(data, l, mid - l + 1); /b~|(g31"
if ((r - mid) > THRESHOLD) 7d'gG[Z^^
mergeSort(data, temp, mid + 1, r); Jz'8|o;^
else J3#
insertSort(data, mid + 1, r - mid); ,K[}Bz
6$"0!fl>
for (i = l; i <= mid; i++) { "\u_gk{g
temp = data; :Y>M//0
} @qWes@
for (j = 1; j <= r - mid; j++) { } l4d/I
temp[r - j + 1] = data[j + mid]; _9Y7.5
} B;mt11M
int a = temp[l]; @(Y+W2Iyy+
int b = temp[r]; tx01*2]pX
for (i = l, j = r, k = l; k <= r; k++) { RB `<Zw
if (a < b) { OBJk\j+Wi
data[k] = temp[i++]; 4?F7%^vr
a = temp; %b(non*
} else { 9t^Q_[hG
data[k] = temp[j--]; p?+*R@O
b = temp[j]; 97n@HL1
} < &~KYu\r
} _'47yq^O
} ^GN|}W
3~Vo]wv
/** 8I*WVa$l
* @param data l~9P4 ,
* @param l VvTs87
* @param i .}zpvr8YP
*/ M,nLPHgK
private void insertSort(int[] data, int start, int len) { X6lR?6u%|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M<x W)R
} W2\Q-4D
} TWFi.w4pY
} ^@0-E@ {c
} +r 2\v
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堆排序： _laLTP*
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package org.rut.util.algorithm.support; _N-JRM m<
iSz?V$}?
import org.rut.util.algorithm.SortUtil; 'aoHNZfxw
;'x\L<b/)
/** EO[UezuU
* @author treeroot dJ0qg_ U&
* @since 2006-2-2 MVpk/S%W
* @version 1.0 b#<@&0KE
*/ E5}wR(i,4
public class HeapSort implements SortUtil.Sort{ l;gj],*
NFQR
/* (non-Javadoc) "Lp"o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =Nj58l
*/ 8+7=yN(
public void sort(int[] data) { fm%1vM$[J
MaxHeap h=new MaxHeap(); Cyw cJ
h.init(data); u LXV,
for(int i=0;i h.remove(); kTLA["<m
System.arraycopy(h.queue,1,data,0,data.length); iqj ZC80
} I3ZbHb-)_,
>^Zyls
private static class MaxHeap{ )~X*&(7RR}
O]Mz1 ev|
void init(int[] data){ 4&c7^ 4w~
this.queue=new int[data.length+1]; TdAHw @(
for(int i=0;i queue[++size]=data; -UM5&R+o
fixUp(size); @9!,]n
} !MiH^wP
} V\V:uo(C
]EzX$T
private int size=0; ?/,sKF74i
dU~DlaEy(
private int[] queue; Fq<;-
2-3|0<`
public int get() { 6jIW)C
return queue[1]; = yH#Iil
} G'>z~I]6S
NI^[7.2
public void remove() { @?GOOD_i
SortUtil.swap(queue,1,size--); '5mzlR
fixDown(1); !PfIe94{`
} ir4uy
file://fixdown n./onv
private void fixDown(int k) { E Fx@O
int j; y ~ A]
while ((j = k << 1) <= size) { f;(]P
if (j < size %26amp;%26amp; queue[j] j++; AF qut
if (queue[k]>queue[j]) file://不用交换 +r+H`cT@
break; b7:B[7yK.x
SortUtil.swap(queue,j,k); I+Q`i:\,q
k = j; :X`Bc"
} =m4_8)-8u
} 3??*G8Yp
private void fixUp(int k) { om"q[Tudc
while (k > 1) { m*h, <,}-+
int j = k >> 1; @42!\1YT
if (queue[j]>queue[k]) dpBG)Xzoyv
break; a?IL6$z
SortUtil.swap(queue,j,k); Bpjwc<U
k = j; J@{yWgLg
} $cLtAo^W
} S;"7d
aeESS;JxJj
} >o\[?QvP
K%: :
} l/BE~gdl
\@kY2,I V
SortUtil： wNuS'P_(:T
p1=sDsLL
package org.rut.util.algorithm; mySm:ToT
1f 0"z1
import org.rut.util.algorithm.support.BubbleSort; T#1>pED
import org.rut.util.algorithm.support.HeapSort; ]Qp0|45=
import org.rut.util.algorithm.support.ImprovedMergeSort; }31z 35
import org.rut.util.algorithm.support.ImprovedQuickSort; <mc[-To
import org.rut.util.algorithm.support.InsertSort; MK]S205{
import org.rut.util.algorithm.support.MergeSort; }{^i*T5rl
import org.rut.util.algorithm.support.QuickSort; z/7H/~d
import org.rut.util.algorithm.support.SelectionSort; 1R/=as,R
import org.rut.util.algorithm.support.ShellSort; -4JdKO
9Q".166
/** >sE5zj|V
* @author treeroot wR;_x x
* @since 2006-2-2 ]FLuiC
* @version 1.0 W"mkNqH
*/ %$ ^yot
public class SortUtil { Te"<.0~1
public final static int INSERT = 1; >9f-zv(n
public final static int BUBBLE = 2; c FjC
public final static int SELECTION = 3; 8VLr*83~8
public final static int SHELL = 4; 7oPBe1P,K+
public final static int QUICK = 5; T8.@}a
public final static int IMPROVED_QUICK = 6; $4V ~hI4
public final static int MERGE = 7; FU0&EO
public final static int IMPROVED_MERGE = 8; %}G:R!4 d
public final static int HEAP = 9; Q1Z;vzQfg
%S22[;v{N
public static void sort(int[] data) { G!uQ|<(
sort(data, IMPROVED_QUICK); G}<q
} %Gn(b1X
private static String[] name={ 35yhe:$nf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AZ5c^c)
}; #Dx$KPD
bwo"s[w
private static Sort[] impl=new Sort[]{ O'deQq[
new InsertSort(), m=2TzLVv
new BubbleSort(), /^v4[]
new SelectionSort(), }k}5\%#li5
new ShellSort(), J4te!,
new QuickSort(), 8zz-jkR
new ImprovedQuickSort(), Q]7Q4U
new MergeSort(), _OTkv6;4n
new ImprovedMergeSort(), WK#lE&V3
new HeapSort() |B4dFI?
}; Z94D<X"
K}O~tff
public static String toString(int algorithm){ ^!|BKH8>f%
return name[algorithm-1]; Gq;0j:?CC
} 6^['g-\2
KhZ'Ic[vw
public static void sort(int[] data, int algorithm) { G7C9FV bR
impl[algorithm-1].sort(data); +v&+8S`+
} R+Ke|C
l\5qa_{z
public static interface Sort { 3}$L4U
public void sort(int[] data); #hzs,tvvD
} XH)MBr@Fz
iD@2_m)
public static void swap(int[] data, int i, int j) { SsafRK$
int temp = data; <acAc2
data = data[j]; Vm&fw".J
data[j] = temp; z@VY s
} A1\;6W:
} K^H=E