[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; Gf8s?l
} -{h
int i1=l; WS& kx~oQ
int i2=mid+1; ^4%Zvl
for(int cur=l;cur<=r;cur++){ !gwjN_ZJ^
if(i1==mid+1) zr76_~B1u
data[cur]=temp[i2++]; DjMf,wX-{
else if(i2>r) =1dI>M>tm
data[cur]=temp[i1++]; vUC!fIG
else if(temp[i1] data[cur]=temp[i1++]; {Hr$wa~
else gPS&^EdxA
data[cur]=temp[i2++]; ryO$6L
} fpM#XFj
} "s W-_j]
dAJ,x =`
} #s5 pz8v
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改进后的归并排序: PXP`ZLF
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package org.rut.util.algorithm.support; {5c]Mn"r
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import org.rut.util.algorithm.SortUtil; E04l|
"rXOsX\;
/** %IL6ix
* @author treeroot (yQ 5`
* @since 2006-2-2 Z.&\=qiY
* @version 1.0 l#3($QV,
*/ [n,?WwC
public class ImprovedMergeSort implements SortUtil.Sort { NTs;FX~g[
nbofYI$rd&
private static final int THRESHOLD = 10; v4?iOD
^CzYDq
/* ]kktoP|D
* (non-Javadoc) B%<e FFV\
* "oJ(J{Jat
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'p)Q68;&
*/ =4C}{IL
public void sort(int[] data) { "YFls#4H-
int[] temp=new int[data.length]; h?@G$%2
mergeSort(data,temp,0,data.length-1); )tZ`K |
} &!7+Yb(1
+2cs#i
private void mergeSort(int[] data, int[] temp, int l, int r) { @b!"joEy
int i, j, k; A3P9.mur
int mid = (l + r) / 2; B_3QQtjAl
if (l == r) exR^/|BR
return; O^{1RV3:,T
if ((mid - l) >= THRESHOLD) t7#lsd`_
mergeSort(data, temp, l, mid); .I?@o8'x
else ?s} %
insertSort(data, l, mid - l + 1); t> Q{yw
if ((r - mid) > THRESHOLD) x49!{}
mergeSort(data, temp, mid + 1, r); J$uM 03
else ~HLRfL?
insertSort(data, mid + 1, r - mid); 5$l9@0D.\
mAqDjRV1
for (i = l; i <= mid; i++) { XL< )v_
temp = data; $,1dQeE
} wV<7pi
for (j = 1; j <= r - mid; j++) { &R$Q\,
temp[r - j + 1] = data[j + mid]; g%J./F=@3
} %j]STD.E
int a = temp[l]; 0TE@xqW
int b = temp[r]; -R+zeu(e'
for (i = l, j = r, k = l; k <= r; k++) { ;'kI/(;;C
if (a < b) { T@+ClZi
data[k] = temp[i++]; OS7RQw1
a = temp; 10N,?a
} else { B< ;==|
data[k] = temp[j--]; &a~=b,
b = temp[j]; 3_ 2hC!u!K
} VAj<E0>
} &/F_*=VE
} P@ypk^v
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/** Z}Cqd?_')
* @param data TnxKR$Hoh
* @param l 5rN_jC*U
* @param i 2RNrIU I2
*/ 0%Q9}l#7
private void insertSort(int[] data, int start, int len) { 8Pmwzpk02
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9 pKm*n&
} X BI;Lg
} @6.]!U4w
} eqzTQen8q
} =t+('
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堆排序： qb7^VIo%c
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package org.rut.util.algorithm.support; Dt}dp_
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import org.rut.util.algorithm.SortUtil; ?vbDB4
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/** !'c|N9
* @author treeroot uCUu!Vfeg
* @since 2006-2-2 c8Pb
* @version 1.0 jPwef##~7
*/ Z.jCera.
public class HeapSort implements SortUtil.Sort{ 3ut_Bt\
gA +:CgQ
/* (non-Javadoc) OD4W}Y.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jb@\i@-
*/ {g=b]yg\o
public void sort(int[] data) { ,?=KgG1i
MaxHeap h=new MaxHeap(); fEiJ~&{&
h.init(data); _Xh=&(/8@
for(int i=0;i h.remove(); sco uO$K
System.arraycopy(h.queue,1,data,0,data.length); "Gh#`T0#a
} &c^7O#j
m#ad6 \
private static class MaxHeap{ A~y VYC6l
Y?!/>q
void init(int[] data){ $%}>zqD1
this.queue=new int[data.length+1]; {CP o<lz
for(int i=0;i queue[++size]=data; 75Fp[Q-
fixUp(size); -N^=@Yx)
} ' o=E!?
} 22bT3
@a;sV!S{
private int size=0; d=nh
XARSGAuw
private int[] queue; a-Y6w5
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public int get() { )kA2vX^=Z
return queue[1]; sL~,
} Ar~{=X
\]a uSO
public void remove() { \(9p&"Q-
SortUtil.swap(queue,1,size--); 3;D?|E]1
fixDown(1); a(Sv,@/
} d<Dn9,G
file://fixdown f(.6|mPp
private void fixDown(int k) { BD4"pcr
int j; /$*; >4=>f
while ((j = k << 1) <= size) { p2a?9R
if (j < size %26amp;%26amp; queue[j] j++; a@k.$
if (queue[k]>queue[j]) file://不用交换 0# UAjT3
break; P%jkKE?B4
SortUtil.swap(queue,j,k); [Yoa"K
k = j; Ltg-w\?]
} 7 s-`QdWX
} y[p6y[r*
private void fixUp(int k) { CRd_}
while (k > 1) { g5<ZS3tQ
int j = k >> 1; ~FNPD'`t
if (queue[j]>queue[k]) ]TfeBX6ST
break; ;>/ipnx
SortUtil.swap(queue,j,k); /MqP[*L
k = j; |w,^"j2R
} u=l0f6W
} 1l~.R#WG&
PIpWa$b
} rJp?d9B
0O^r.&{j>
} ]nHe$x!2]
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SortUtil： m^Rd Iy)
ndB@J*Imu
package org.rut.util.algorithm; S#hu2\9D,
gm}C\q9
import org.rut.util.algorithm.support.BubbleSort; SE-} XI\
import org.rut.util.algorithm.support.HeapSort; }kv)IJ
import org.rut.util.algorithm.support.ImprovedMergeSort; l]/> `62
import org.rut.util.algorithm.support.ImprovedQuickSort; 7j95"mI
import org.rut.util.algorithm.support.InsertSort; 2}>go^#O/w
import org.rut.util.algorithm.support.MergeSort; 5bF5~D(E
import org.rut.util.algorithm.support.QuickSort; JN)"2}SE
import org.rut.util.algorithm.support.SelectionSort; B ;;cbY
import org.rut.util.algorithm.support.ShellSort; Do(PdF6A
'H FwP\HX
/** %!D_q~"H
* @author treeroot a\Tr!Be,
* @since 2006-2-2 @V7;TJk
* @version 1.0 mnQal>0~
*/ vB]3Xb3a
public class SortUtil { vr<)Ay
public final static int INSERT = 1; @ > cdHv
public final static int BUBBLE = 2; H2s*s[T -
public final static int SELECTION = 3; $kM'
public final static int SHELL = 4; s%hU*^ 8
public final static int QUICK = 5; `7F@6n
public final static int IMPROVED_QUICK = 6; I"~xDa!
public final static int MERGE = 7; +0SW ?#%
public final static int IMPROVED_MERGE = 8; HI7]%<L
public final static int HEAP = 9; TR+Q4Y:
yr (g~MQ
public static void sort(int[] data) { PlF89-
sort(data, IMPROVED_QUICK); *C tsFS~
} `s#sE.=o
private static String[] name={ ]9dx3<2_I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t4C<#nfo
}; VoWA tNU
m]Hb+Y=;h
private static Sort[] impl=new Sort[]{ o8iig5bp
new InsertSort(), oPp!*$V
new BubbleSort(), Qs~d_;
new SelectionSort(), |qQ{8T%)
new ShellSort(), ;,()wH
new QuickSort(), 5XhK#X%:A
new ImprovedQuickSort(), i#Ne'q;T
new MergeSort(), ll 6]W~[ZC
new ImprovedMergeSort(), q+r `e
new HeapSort() (ej:_w1
}; M ,Zm|3L
5~v(AB(x
public static String toString(int algorithm){ .ou!g&xu
return name[algorithm-1]; 8 /5sv
} *vRNG 3D/
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public static void sort(int[] data, int algorithm) { cH+h=E=
impl[algorithm-1].sort(data); .G7]&5s
} &?}kL= h
5B8V$ X
public static interface Sort { &Bj,.dD/a
public void sort(int[] data); TXZ(mj?
} 49iR8w?k
*1 n;p)K
public static void swap(int[] data, int i, int j) { VyB\]EBu
int temp = data; -G(3Y2
data = data[j]; 3P%w-qT!N
data[j] = temp; |G|*
} =$&7IQ?
} \7OJN ~&<