[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; 6~8X/ -02
} A0uA\E4q
int i1=l; qzE -y-9@
int i2=mid+1; c~Z\|Y`#B
for(int cur=l;cur<=r;cur++){ |0N1]Hf
if(i1==mid+1) -~=:tn)0
data[cur]=temp[i2++]; ;u?H#\J,
else if(i2>r) hL/
data[cur]=temp[i1++]; lHoV>k
else if(temp[i1] data[cur]=temp[i1++]; 4,6nk.$yN
else * p,2>[e
data[cur]=temp[i2++]; S6|L !pO
} F!6;<!&h
} BIEeHN4
8:Jc2K
} ')v<MqBr
_sNJU
改进后的归并排序: kD4J{\
rWzO>v
package org.rut.util.algorithm.support; :eTzjW=
'ul~f$ V
import org.rut.util.algorithm.SortUtil; (L8z<id<z
O(44Dy@2
/** JclG*/Wjg4
* @author treeroot zlN<yZB^
* @since 2006-2-2 ~]lVixr9
* @version 1.0 'uV;)~
*/ Eh?,-!SUQn
public class ImprovedMergeSort implements SortUtil.Sort { \_zp4Xb2
! ^U!T\qDi
private static final int THRESHOLD = 10; ]g0\3A
\bWo"Yo
/* }^3ICwzm
* (non-Javadoc) dI9u:-
* dpcFS0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0RGSv!w
*/ f{u3RCfX~2
public void sort(int[] data) { &H@OLyC
int[] temp=new int[data.length]; )3KQ QGi8
mergeSort(data,temp,0,data.length-1); "DNiVL.
} yBwCFn.uP-
}Dc?Emb
private void mergeSort(int[] data, int[] temp, int l, int r) { i_qR&X
int i, j, k; dWAKIBe
int mid = (l + r) / 2; SXfAw)-n
if (l == r) ){{]3r
return; Snf1vH
if ((mid - l) >= THRESHOLD) sa>}wz<o
mergeSort(data, temp, l, mid); ZA/:\6gm
else xp"5L8:C
insertSort(data, l, mid - l + 1); JRl`evTS
if ((r - mid) > THRESHOLD) lCMU{)
mergeSort(data, temp, mid + 1, r); LTc=D
else XDrNc!XN
insertSort(data, mid + 1, r - mid); 4^rO K
J$Nc9?|ZZ
for (i = l; i <= mid; i++) { 1K'.QRZMb9
temp = data; ZSg["`
} `(7HFq<N
for (j = 1; j <= r - mid; j++) { cu V}<3&
temp[r - j + 1] = data[j + mid]; 8HymkL&F
} 5PU$D`7it
int a = temp[l]; *~%# =o
int b = temp[r]; h,C?%H+/0Q
for (i = l, j = r, k = l; k <= r; k++) { wst)O{4
if (a < b) { ir*T,O 2J
data[k] = temp[i++]; H+ Y+8
a = temp; VY=c_Gl
} else { g<r'f"^
data[k] = temp[j--]; !F&Ss|(}
b = temp[j]; Ohmi(s
} 6~j.S "
} 27!9LU
} #=B~} _
&7\q1X&Rr
/** >B9|;,a
* @param data w\z6-qa
* @param l ^Q$U.sN?R
* @param i MHVHEwr.{
*/ e+5]l>3)f
private void insertSort(int[] data, int start, int len) { K6Gri>Um
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fhZD[m#D
} ;0f?-W?1
} 'YcoF;&[C
} gqf*;Z eU
} T]tG,W1>i
L3g}Z1<!$
堆排序： _,JdL'[d
` E2@GX+,
package org.rut.util.algorithm.support; H,!3s<1
g :me:M
import org.rut.util.algorithm.SortUtil; S%7^7MSqA
elBmF#,j7
/** .v3~2r*&
* @author treeroot YQI&8~z
* @since 2006-2-2 T]%:+_,
* @version 1.0 phA^ kdW
*/ XfXqq[\N
public class HeapSort implements SortUtil.Sort{ pU|SUM
l}$Pv?T,2
/* (non-Javadoc) /J"U`/ {4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ox` +Z0)a
*/ `E),G;I
public void sort(int[] data) { .D`""up|{
MaxHeap h=new MaxHeap(); G3&l|@5
h.init(data); q! +?
for(int i=0;i h.remove(); C?3?<FDL
System.arraycopy(h.queue,1,data,0,data.length); [o=v"s't)
} ^sNj[%I R
\666{.a
private static class MaxHeap{ /k(KA [bS
"c6(=FFq
void init(int[] data){ OBY
this.queue=new int[data.length+1]; Y!6,ty'
for(int i=0;i queue[++size]=data; ]~SOGAFW
fixUp(size); JPX5Jm()
} 'o#ve72z1
} D#T1~r4
P2S$Dk_<\X
private int size=0; :{d?B$
nSL x1Q
private int[] queue; 4$=Dq$4z
'Zdjd]
public int get() { xi]qdiA
return queue[1]; I3A@0'Vm;L
} 4q`$nI Bi
(\ze T5
public void remove() { P-?ya!@"
SortUtil.swap(queue,1,size--); Ed%8| M3
fixDown(1); J0e~s
} RfMrGC^?
file://fixdown qd9CKd
private void fixDown(int k) { mE"?{~XVL
int j; (YbRYu
while ((j = k << 1) <= size) { d5zF9;[
if (j < size %26amp;%26amp; queue[j] j++; :h>d'+\
if (queue[k]>queue[j]) file://不用交换 \B'rWk33,
break; AiT&:'<UT
SortUtil.swap(queue,j,k); (1r.AG`g
k = j; Khbkv
} ab1qcQ<
} EPQ~V
private void fixUp(int k) { R(c:#KF#8
while (k > 1) { d85\GEF9i
int j = k >> 1; ?t&sT
if (queue[j]>queue[k]) 8\BCC1K
break; `3Gjj&c
SortUtil.swap(queue,j,k); %d5;JEgA:g
k = j; '[ZRWwhr
} cC.=,n
} LCrE1Q%VP
F j_r n
} H1(Zzn1
2l)J,z
} Kp+Lk
eGZX6Q7m
SortUtil： Y~qv 0O6K
KKR@u(+"a
package org.rut.util.algorithm; km;M!}D
?NZKu6
import org.rut.util.algorithm.support.BubbleSort; P&@:''
import org.rut.util.algorithm.support.HeapSort; Hnv{sND[
import org.rut.util.algorithm.support.ImprovedMergeSort; 'sCj\N
import org.rut.util.algorithm.support.ImprovedQuickSort; >g%^hjJ
import org.rut.util.algorithm.support.InsertSort; u.wm;eK[
import org.rut.util.algorithm.support.MergeSort; GbC-6.~
import org.rut.util.algorithm.support.QuickSort; &j\<UPn
import org.rut.util.algorithm.support.SelectionSort; =#@eDm%
import org.rut.util.algorithm.support.ShellSort; #Y3:~dmJ-
,"PKGd]^
/** 47R4gs#W
* @author treeroot OC|9~B1
* @since 2006-2-2 g0m6D:f
* @version 1.0 Th&* d;
*/ '/^bO#G:
public class SortUtil { 4~Ptn/ g
public final static int INSERT = 1; =)Cqjp
public final static int BUBBLE = 2; ffuV158a&
public final static int SELECTION = 3; WxE4r
public final static int SHELL = 4; SMr ]Gf.
public final static int QUICK = 5; oyGO!j
public final static int IMPROVED_QUICK = 6; N;XaK+_2F
public final static int MERGE = 7; Lw 7,[?,Z
public final static int IMPROVED_MERGE = 8; &u62@ug#}
public final static int HEAP = 9; y$VYWcFE
+~O0e-d
public static void sort(int[] data) { mC P*v-
sort(data, IMPROVED_QUICK); $2uZdl8Rvj
} >:whNp
private static String[] name={ "HRoS#|\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _pSCv:3T
}; =&QC&CqEi
~Qzb<^9]
private static Sort[] impl=new Sort[]{ W+[XNIg5
new InsertSort(), Ca[H<nyj
new BubbleSort(), >E;-asD
new SelectionSort(), |wASeZMO2
new ShellSort(), HS{a^c%
new QuickSort(), W]!{Y'G
new ImprovedQuickSort(), re9*q
new MergeSort(), ~$1Zw&X
new ImprovedMergeSort(), -@49Zh2'
new HeapSort() D-8NDa(`
}; P"dWh;I_
5"4O_JQ
public static String toString(int algorithm){ 5T?esF<
return name[algorithm-1]; MTZbRi6z
} $sDvE~f0n
N;cEf7+f
public static void sort(int[] data, int algorithm) { I g/SaEF
impl[algorithm-1].sort(data); p`// *gl
} Byf5~OC
;[*jLi,uc
public static interface Sort { @1#QbNp#
public void sort(int[] data); jseyT#2
} ! 6kLL
y{hy
public static void swap(int[] data, int i, int j) { +{V"a<D$m
int temp = data; V`OeJVe
data = data[j]; l MCoc'ae
data[j] = temp; _qg)^M6
} *={` %
} hLyD#XCFA