[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; *c%{b3T_
} Hj`\Fm*A
int i1=l; cdGBo4
int i2=mid+1; V_e
for(int cur=l;cur<=r;cur++){ N9*QQ0
if(i1==mid+1) I\M }Dxpp
data[cur]=temp[i2++]; ]Nssn\X7
else if(i2>r) TI2K_'
data[cur]=temp[i1++]; 2qVoe}F
else if(temp[i1] data[cur]=temp[i1++]; }}rp/16
else j0Cj&x%qF}
data[cur]=temp[i2++]; zN)).a
} oxUBlye
} py%~Qz%
eR`Q7]j] -
} 48 0M|^
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改进后的归并排序: &sYxe:H
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package org.rut.util.algorithm.support; }7xcHVO8-
<dVJV?i;
import org.rut.util.algorithm.SortUtil; Wl+spWqW
k=d0%} `M(
/** %\}5u[V
* @author treeroot AOwmPHEL
* @since 2006-2-2 #_K<-m%9
* @version 1.0 K3WaBcm
*/ gLFTnMO
public class ImprovedMergeSort implements SortUtil.Sort { RED@|[Qh
H4T~Kv
private static final int THRESHOLD = 10; #,1)@[
<u],R.S)
/* j/NX
* (non-Javadoc) p&4n"hC
* 2}*8( 32
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xoGrXt9&
*/ ]O~$|Wk
public void sort(int[] data) { ;n|%W,b-
int[] temp=new int[data.length]; &m\Uc
mergeSort(data,temp,0,data.length-1); oSjYp(h:
} "(dI/}
{Xr 9]g`
private void mergeSort(int[] data, int[] temp, int l, int r) { |QR9#Iv
int i, j, k; ]Wjcr2Wq
int mid = (l + r) / 2; ;R<V-gab
if (l == r) Bga4kjfmk
return; .wlKl[lE2
if ((mid - l) >= THRESHOLD) f87XE";:A
mergeSort(data, temp, l, mid); s%>8y\MaK
else bR:hu}YS
insertSort(data, l, mid - l + 1); O 9M?Wk :
if ((r - mid) > THRESHOLD) p-w:l*-`
mergeSort(data, temp, mid + 1, r); yOAC<<Tzus
else JBZ1DZAWC
insertSort(data, mid + 1, r - mid); PRFl%M.H`
wuk\__f4
for (i = l; i <= mid; i++) { z!.cc6R
temp = data; N 6\Ey{
} oS<GjI:
for (j = 1; j <= r - mid; j++) { _2}~Vqb+
temp[r - j + 1] = data[j + mid]; &h!O<'*2
} %q9"2] cR
int a = temp[l]; T2tvU*[=
int b = temp[r]; Zw'050~-
for (i = l, j = r, k = l; k <= r; k++) { ma<uXq
if (a < b) { 6R$Yh0%
data[k] = temp[i++]; o-AF_N
a = temp; ;+#Nb/M
} else { 7`^Y*:(
data[k] = temp[j--]; $"MVr5q6
b = temp[j]; -XK;B--c
} (plT/0=^t
} EAxdF u
} WB<MU:.Vc
gf9U<J#&C
/** S;D]ym
* @param data bGy|T*@
* @param l @de0)AJG6
* @param i L 8;H_:~_'
*/ >El]5M7h7
private void insertSort(int[] data, int start, int len) { dV}]\8N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \1n (Jr.<
} 9Nx%Sdu
} I_N:j,Mx
} R?2HnJh
} 4PkKL/E
Q 8;JvCz
堆排序： ^SsnCn-e
x ju*zmu
package org.rut.util.algorithm.support; gX(Xj@=(&
0M&~;`W}
import org.rut.util.algorithm.SortUtil; 19pFNg'kA
gN73)uJ0
/** D`'Cnt/
* @author treeroot qK2jJ3)>
* @since 2006-2-2 G]EI!-y
* @version 1.0 0S'@(p[A
*/ ~Cg7
public class HeapSort implements SortUtil.Sort{ ue@W@pj
jt9- v-
/* (non-Javadoc) U}k@%m,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7sWe32
*/ |-S+x]9
public void sort(int[] data) { H!OX1F
MaxHeap h=new MaxHeap(); Iu5 9W>
h.init(data); 8t)gfSG
for(int i=0;i h.remove(); 1w7XM0SHcn
System.arraycopy(h.queue,1,data,0,data.length); b?lRada{I
} N7 hlM
\7#w@3*
private static class MaxHeap{ x2r.4
HvKdV`bz
void init(int[] data){ t.VVE:A^%
this.queue=new int[data.length+1]; FKL@,>!<e
for(int i=0;i queue[++size]=data; wPu.hVz
fixUp(size); v;Q*0%~
} so/0f1R?~
} J|^z>gP(
mh`uvqY
private int size=0; ur=:Ha
4`fV_H.8
private int[] queue; k'PvQl"I
a^E>LJL
public int get() { j72mm!
return queue[1]; ~-uf%=
} jvD_{r
R#8cOmZ
public void remove() { 7 b(
SortUtil.swap(queue,1,size--); YjJ^SU`*
fixDown(1); Q-#<{' (
} fo`R=|L[
file://fixdown LHu
private void fixDown(int k) { 5JK'2J&
int j; %g89eaEZ
while ((j = k << 1) <= size) { B!8X?8D
if (j < size %26amp;%26amp; queue[j] j++; 8faT@J'e;
if (queue[k]>queue[j]) file://不用交换 {D :WXvI
break; !<VP[%2L~
SortUtil.swap(queue,j,k); Li0+%ijM
k = j; #CAZ}];Qx
} .a(G=fk
} 4GeN<9~YS
private void fixUp(int k) { t%5bDdo
while (k > 1) { &(l.jgqg&
int j = k >> 1; in,0(I&I
if (queue[j]>queue[k]) ,Shzew+
break; wq!9wk9
SortUtil.swap(queue,j,k); $sg-P|Wo
k = j; YWDgRb
} j8bA"r1
} S~ S>62
"^BA5
} ggkz fg&
u^c/1H:6
} XeY[;}9
9HiyN>(
SortUtil： ;lrO?sm
CR2.kuM0~
package org.rut.util.algorithm; G %\/[ B
&DHIYj1 i
import org.rut.util.algorithm.support.BubbleSort; ?"<m{,yQI
import org.rut.util.algorithm.support.HeapSort; *zDDi(@vtK
import org.rut.util.algorithm.support.ImprovedMergeSort; /-m)
import org.rut.util.algorithm.support.ImprovedQuickSort; c;-NRvVb
import org.rut.util.algorithm.support.InsertSort; *B{]
import org.rut.util.algorithm.support.MergeSort; 0T#z"l<L
import org.rut.util.algorithm.support.QuickSort; ,_w}\'?L
import org.rut.util.algorithm.support.SelectionSort; *P]]7DR
import org.rut.util.algorithm.support.ShellSort; .d$Q5Qae
'@w'(}3!3R
/** |8[!`T*s
* @author treeroot 2J$vX(
* @since 2006-2-2 BhbfPQ
* @version 1.0 gW4fwE^
*/ nhC8Tq[m
public class SortUtil { f<nK;
public final static int INSERT = 1; =3SJl1w1
public final static int BUBBLE = 2; HkhZB^_V
public final static int SELECTION = 3; LjW32>B
public final static int SHELL = 4; Y}s6__
public final static int QUICK = 5; ,L~aa?Nb-
public final static int IMPROVED_QUICK = 6; 8y_(Iu|:
public final static int MERGE = 7; c9Cc%EK
public final static int IMPROVED_MERGE = 8; xx7&y!_
public final static int HEAP = 9; k$8Zg*)
NG:4Q.G1g
public static void sort(int[] data) { :sLg$OF
sort(data, IMPROVED_QUICK); (JnEso-V
} +j+ v(-
private static String[] name={ K3h7gY|.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nR@mm j
}; E]g6|,4~-
^-n^IR}J
private static Sort[] impl=new Sort[]{ (vzYgU,
new InsertSort(), ~&F|g2:
new BubbleSort(), _y>drvg
new SelectionSort(), $FX$nY
new ShellSort(), gGBRfq>
new QuickSort(), aK|
new ImprovedQuickSort(), #Yp&yi }
new MergeSort(), fO^s4gWTg
new ImprovedMergeSort(), hJSWh5]
new HeapSort() YDYNAOThnb
}; HrFbUK@@
$3&XM
public static String toString(int algorithm){ XkoPN]0n
return name[algorithm-1]; +t&)Z
} ;V?(j3b[
0.nkh6?
public static void sort(int[] data, int algorithm) { !Y7$cU &
impl[algorithm-1].sort(data); "iX\U'`
} 4MW oGV9
fl9VokAT
public static interface Sort { _?'W30Dg
public void sort(int[] data); )^4Ljb1
} "*l{ m2"
v3t<rv
public static void swap(int[] data, int i, int j) { KU0Ad);e
int temp = data; q(hBqUW
data = data[j]; 9kqR-T|Q
data[j] = temp; fZsw+PSy
} OK`^DIr5l
} PvjZoF["