[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; 9+.3GRt7
} /c4$m3?]
int i1=l; p!<PRms@
int i2=mid+1; )oM% N
for(int cur=l;cur<=r;cur++){ uaCI2I
if(i1==mid+1) c]qh)F$s8
data[cur]=temp[i2++]; :3J`+V}9;
else if(i2>r) r/0AM}[!*j
data[cur]=temp[i1++]; qNMYZ0,
else if(temp[i1] data[cur]=temp[i1++]; $?LegX
else oJ#;XR
data[cur]=temp[i2++]; y`/:E<fVk
} :x^e T
} d?cCSf
ST4[d'|j
} t~qAA\p}o
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改进后的归并排序: C*t0`3g d
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package org.rut.util.algorithm.support; <Skf n`).
xf|C{XV@H
import org.rut.util.algorithm.SortUtil; -KG1"g,2
gh `_{l
/** ofgNL .u
* @author treeroot bhfKhXh8
* @since 2006-2-2 \`-xxhb?e
* @version 1.0 ;rnhv:Iw
*/ YhN:t?
public class ImprovedMergeSort implements SortUtil.Sort { a'*~E?b
whGtVx|zR
private static final int THRESHOLD = 10; SK*<H~2
P$@:T[}v
/* ldRq:M5z
* (non-Javadoc) 9c5DEq
* Fa{[kJ8z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "1p, r&}
*/ KmWd$Qy,
public void sort(int[] data) { KR%NgV+}!0
int[] temp=new int[data.length]; 'mF&`BN}b
mergeSort(data,temp,0,data.length-1); *w6F0>u
} o+- 0`!yj
SWT)M1O2
private void mergeSort(int[] data, int[] temp, int l, int r) { b/E3Kse?
int i, j, k; *hpS/g/3\
int mid = (l + r) / 2; R(f%*S4
if (l == r) ndk~(ex|j
return; wawJZ+V
if ((mid - l) >= THRESHOLD) lt\Bm<"z!1
mergeSort(data, temp, l, mid); &F'n >QT9q
else M`)3(|4
insertSort(data, l, mid - l + 1); EQ"+G[j~x
if ((r - mid) > THRESHOLD) f/m0,EERk
mergeSort(data, temp, mid + 1, r); uw@-.N^
else fEGnI\
insertSort(data, mid + 1, r - mid); Tv|iCYB?
vJX0c\e
for (i = l; i <= mid; i++) { e YiqTWn:
temp = data; Ypinbej
} { / ,?3
for (j = 1; j <= r - mid; j++) { oTTE<Ct[
temp[r - j + 1] = data[j + mid]; ]L3MIaO2T
} {Z>Mnw"R
int a = temp[l]; \#C]|\
int b = temp[r]; i7&ay\+@
for (i = l, j = r, k = l; k <= r; k++) { DJ1!Xuu
if (a < b) { ^5k~7F.
data[k] = temp[i++]; z.tN<P7
a = temp; ke2M&TV
} else { UunZ/A$]m
data[k] = temp[j--]; w,0OO f
b = temp[j]; 3k/X;:,.
} hdH3Jb_hl(
} FgR9$ is+
} FB3}M)G>M
bH%d*
/** {.Brh"yC
* @param data I:;umyRH
* @param l ?0:=+%.
* @param i L3s"L.G
*/ d9l2mJzW
private void insertSort(int[] data, int start, int len) { bu=RU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D&DbxTi
} Sj viH
} e`K{
} +{%)}?F
} R^INl@(O
#K/95!)
堆排序： ROO@EQ#`Z
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package org.rut.util.algorithm.support; '{)Jhl47
y<l(F?_
import org.rut.util.algorithm.SortUtil; cXb&Rm'L
Ian+0 ?`e
/** yIWgC[
* @author treeroot w/9%C(w6
* @since 2006-2-2 K.b:ae^k
* @version 1.0 j?\z5i""f
*/ hzA+,
public class HeapSort implements SortUtil.Sort{ C>QWV[F
'k[vcnSz\/
/* (non-Javadoc) ,G[Y< ~Hy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a&7uRR26
*/ VDiW9]
public void sort(int[] data) { p@oz[017/J
MaxHeap h=new MaxHeap(); Ue!yK
h.init(data); k[y^7,r
for(int i=0;i h.remove(); !&5*H06
System.arraycopy(h.queue,1,data,0,data.length); |3`8$-
} T`GiM%R;g
.X:,]of
private static class MaxHeap{ hUEA)c
g|tclBx
void init(int[] data){ *n6L3"cO
this.queue=new int[data.length+1]; ~_wSB[z
for(int i=0;i queue[++size]=data; B#3Q4c$
fixUp(size); HumL(S'm
} LG??Q+`l
} 1jpft3*x
RNt9Qdr4y
private int size=0; '($$-P\/
*JZlG%z
private int[] queue; vx}BTH
>Sb3]$$
public int get() { s@6Jz\<E
return queue[1]; "/%o'Fq
} 2WE01D9O
1*.*\4xo
public void remove() { o/& IT(v
SortUtil.swap(queue,1,size--); Lb{.}
fixDown(1); *&hbfsP:
} w:mm@8N
file://fixdown ZKM@U?PK
private void fixDown(int k) { #$}A$sm
int j; 5=8t<v1Bn
while ((j = k << 1) <= size) { !lBK!'0
if (j < size %26amp;%26amp; queue[j] j++; 7}`FXB
if (queue[k]>queue[j]) file://不用交换 5qFHy[IA
break; ZH~Wn#Wp
SortUtil.swap(queue,j,k); DcE4r>8B
k = j; |7${E^u
} #aiI]'
} X8wtdd]64
private void fixUp(int k) { ?-tNRIPW@p
while (k > 1) { D ,[yx='
int j = k >> 1; /QQjb4S}
if (queue[j]>queue[k]) RiFUa $
break; s'bTP(wl9
SortUtil.swap(queue,j,k); ,5AEtoF
k = j; -aV(6i*n
} Q 9E.AN
} &y7xL-xP
+k[w)7Q
} ls~9qkAyLx
#)3 B
} "2p\/VfA
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SortUtil： dnh~An 9
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package org.rut.util.algorithm; ^x_$%8
E'NS$,h
import org.rut.util.algorithm.support.BubbleSort; 2jxIr-a1G
import org.rut.util.algorithm.support.HeapSort; }(,{^".[}
import org.rut.util.algorithm.support.ImprovedMergeSort; h\Q@zR*0a
import org.rut.util.algorithm.support.ImprovedQuickSort; e3?z^AUXm
import org.rut.util.algorithm.support.InsertSort; wuM'M<J@
import org.rut.util.algorithm.support.MergeSort; mu5r4W47
import org.rut.util.algorithm.support.QuickSort; HJP~ lg
import org.rut.util.algorithm.support.SelectionSort; |dDKO
import org.rut.util.algorithm.support.ShellSort; ZT8LMPC
T|0d2aa
/** f>|<5zm#<
* @author treeroot t0Jqr)9}6
* @since 2006-2-2 ?Iq{6O>D.
* @version 1.0 6YV"H
*/ N(2M w:}
public class SortUtil { ]&dPY[~,/i
public final static int INSERT = 1; ;>S|?M4GZ
public final static int BUBBLE = 2; >(.Y%$9"E
public final static int SELECTION = 3; ^AiQNL}
public final static int SHELL = 4; 6ud<U#\b&
public final static int QUICK = 5; >0uj\5h)I]
public final static int IMPROVED_QUICK = 6; `6;$Z)=.
public final static int MERGE = 7; ]2 $T 6
public final static int IMPROVED_MERGE = 8; X4Pm&ol
public final static int HEAP = 9; i%, 't
xLfv:Rp
public static void sort(int[] data) { K\59vtga
sort(data, IMPROVED_QUICK); R1eWPtWs
} z^s\&gix
private static String[] name={ USS%T<Vk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X*:,|
}; :8HVq*itS
{m@tt{%
private static Sort[] impl=new Sort[]{ o8v,178
new InsertSort(), |~PaCw8-ge
new BubbleSort(), nF<xJs
new SelectionSort(), \Hf/8!q
new ShellSort(), gXM+N(M-
new QuickSort(), xA`j:zn'j
new ImprovedQuickSort(), OiS\tK?|GV
new MergeSort(), Rjv;[
new ImprovedMergeSort(), 4O/IT1+A
new HeapSort() oZ^,*
}; ect$g#
`S.I,<&
public static String toString(int algorithm){ B2a#:E,6
return name[algorithm-1]; /Ov1eQBNG
} !l Egta[Ql
sFnR;
public static void sort(int[] data, int algorithm) { g"(@+\XZH"
impl[algorithm-1].sort(data); u[oV Jvc
} T7Y}v,+-
]>Gi_20*.
public static interface Sort { ;NrPMz
public void sort(int[] data); &flRrJ
} es~1@Jb
3^xq+{\)
public static void swap(int[] data, int i, int j) { +l.LwA
int temp = data; cc:$$_'L
data = data[j]; <(B|g&A
data[j] = temp; #Sx
} ^!0z+M:>^
} m l@%H