[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; i# fvF)
} A4*D3\>%u
int i1=l; D;hJK-Y
int i2=mid+1; 6>3zD)tG
for(int cur=l;cur<=r;cur++){ de9e7.(2
if(i1==mid+1) zjTCq; G
data[cur]=temp[i2++]; peew<SX
else if(i2>r) WOeG3jMz?
data[cur]=temp[i1++]; (Z0.H3
else if(temp[i1] data[cur]=temp[i1++]; Vp1Q^`a{G
else 9.:&u/e
data[cur]=temp[i2++]; ^?: Az
} 2q UX"a4
} u/CR7Y
T2A74>Nw
} 8.&P4u i
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改进后的归并排序: =eR#]d
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package org.rut.util.algorithm.support; /uPMzl
#3O$B*gV6
import org.rut.util.algorithm.SortUtil; &gP1=P,!
;Za^).=
/** sHPlNwyy
* @author treeroot +f}w+
* @since 2006-2-2 oore:`m;
* @version 1.0 "AlR%:]24~
*/ _dc,}C
public class ImprovedMergeSort implements SortUtil.Sort { 4^*Z[6nt|
?es9j]
private static final int THRESHOLD = 10; /VFQbJ+`
VrKLEN\
/* MH]?:]K9V
* (non-Javadoc) 'X\C/8\
* 5>:p'zI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Va4AE)[/*
*/ -j^G4J
public void sort(int[] data) { ;m:I
int[] temp=new int[data.length]; PWV+M@
mergeSort(data,temp,0,data.length-1); !95Q4WH-@
} 3W[Ps?G
- v=ndJ.
private void mergeSort(int[] data, int[] temp, int l, int r) { 1`1Jn*|TI
int i, j, k; lrgvY>E0
int mid = (l + r) / 2; 6|Crc$4l
if (l == r) "Z"`X3,-z
return; BPy pA$
if ((mid - l) >= THRESHOLD) AY]rQ:I
mergeSort(data, temp, l, mid); )LL.fPic
else ;`Sn66&
insertSort(data, l, mid - l + 1); ?U,XyxN
if ((r - mid) > THRESHOLD) yn2k!2]&T<
mergeSort(data, temp, mid + 1, r); m~@Lt~LZs
else G&yF9s)Lvs
insertSort(data, mid + 1, r - mid); YCBUc<)
>qdRqy)DC
for (i = l; i <= mid; i++) { +p-S36K~,7
temp = data; yg%T{hyzH
} (OG>=h8?
for (j = 1; j <= r - mid; j++) { CelM~W$=u
temp[r - j + 1] = data[j + mid]; 5(DnE?}vo
} rD>q/,X=\
int a = temp[l]; /b{Ufo3v
int b = temp[r]; [5]* Be
for (i = l, j = r, k = l; k <= r; k++) { Ct0%3]<J
if (a < b) { G)=+Nt\*
data[k] = temp[i++]; ^56#{~%^?
a = temp; ?o d*"M
} else { 1!R:}r3t
data[k] = temp[j--]; QjsN7h&%
b = temp[j]; pS!N<;OWr
} b~+\\,q}
} F'55BY*!
} ([hd
|H8UT SX+
/** r+nhm"9
* @param data =V^8RlBi
* @param l a]x\e{
* @param i HmpV; <t3
*/ ^p~3H
private void insertSort(int[] data, int start, int len) { (!<G` ;}u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =YR+`[bfI
} EkP(]F
} )<L?3Jjt5
} "oCXG`.k&
} B)ibxM(n*
%U$%x
堆排序： (PnrY~9
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package org.rut.util.algorithm.support; \'x?VVw
~ [=2d a
import org.rut.util.algorithm.SortUtil; T)cbpkH4
.7H*F9
/** YifTC-Q;
* @author treeroot 1<f,>BQ+
* @since 2006-2-2 ^^(4xHN
* @version 1.0 Xx=.;FYk
*/ GnW_^$Fs
public class HeapSort implements SortUtil.Sort{ -KCQ!0\F
V7>{,
/* (non-Javadoc) <V*M%YWs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;<v9i#K5
*/ oFS)3.
public void sort(int[] data) { Z9lfd6MU,
MaxHeap h=new MaxHeap(); OSCeTkR
h.init(data); MtK5>mhZI`
for(int i=0;i h.remove(); ;gW?Fnry;
System.arraycopy(h.queue,1,data,0,data.length); nB ,&m&
} JZ0u/x5
9/50+2F
private static class MaxHeap{ TGozoPV
@RS|}M^4
void init(int[] data){ CA ,0Fe3
this.queue=new int[data.length+1]; M{~KT3c
for(int i=0;i queue[++size]=data; 4N{^niq7
fixUp(size); b~m|mb$
} rxAb]~MMp
} "ZFK-jn/
MXuiQ;./
private int size=0; ESv&x6H
wz5*?[4
private int[] queue; (yi{<$U*
nYO4JlNP
public int get() { 3+r8yiY
return queue[1]; Uzd\#edxJ
} MQGR-WV=5
mkt%|Kb.
public void remove() { /bv4/P
SortUtil.swap(queue,1,size--); {AqPQeNgz
fixDown(1); $F86Dwd
} 5J<ghv>\P
file://fixdown S%m$LM]NCg
private void fixDown(int k) { eI*o9k$Qs
int j; ~@bh[o~rF
while ((j = k << 1) <= size) { Zae$M0)
if (j < size %26amp;%26amp; queue[j] j++; HWT^u$a"
if (queue[k]>queue[j]) file://不用交换 XqTDLM&
break; |0/~7l
SortUtil.swap(queue,j,k); ~!W{C_*N
k = j; _8"%nV
} qU,u(El
} 3.s.&^
private void fixUp(int k) { ] 'ybu&22
while (k > 1) { [D%5Fh\0
int j = k >> 1; uVw|fT
if (queue[j]>queue[k]) -?68%[4lm_
break; -.X-02
SortUtil.swap(queue,j,k); }e*OprF
k = j; X,h"%S<c#H
} KPSHBv-#
} *_7%n-k
V0x;*)\PYm
} rSvQarT
&?#G)suP
} vmZyvJSE
0? QTi(
SortUtil： nB1[OB{
aM|^t:
package org.rut.util.algorithm; s!j[Ovtx
11(:#4Y,
import org.rut.util.algorithm.support.BubbleSort; %^$7z,>;
import org.rut.util.algorithm.support.HeapSort; %0!!998
import org.rut.util.algorithm.support.ImprovedMergeSort; td#B$$[
import org.rut.util.algorithm.support.ImprovedQuickSort; S @MO
import org.rut.util.algorithm.support.InsertSort; <wZ2S3RNA
import org.rut.util.algorithm.support.MergeSort; N3J;_=<4
import org.rut.util.algorithm.support.QuickSort; |B;tv#mKD
import org.rut.util.algorithm.support.SelectionSort; B#T4m]E/
import org.rut.util.algorithm.support.ShellSort; 8vLaSZ="[
Yq?FiE0
/** VgO:`bDF
* @author treeroot @H^Yf
* @since 2006-2-2 <,!e*V*U
* @version 1.0 AsW!GdIN
*/ hc;8Vsa
public class SortUtil { RrGFGn{
public final static int INSERT = 1; Xo:!U=m/#
public final static int BUBBLE = 2; 0qj:v"~Q
public final static int SELECTION = 3; #r}O =izi
public final static int SHELL = 4; _3YuPMaN
public final static int QUICK = 5; M3U*'A\
public final static int IMPROVED_QUICK = 6; sV))Z2sq
public final static int MERGE = 7; U\ Et
public final static int IMPROVED_MERGE = 8; xQ=sZv^M
public final static int HEAP = 9; |99/?T-QW
eZMDtB
public static void sort(int[] data) { OIMsxXF\J
sort(data, IMPROVED_QUICK); 1]i{b/ 4
} bZ$;`F5})
private static String[] name={ dyz)22{\!`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F5|6*K
}; \qAg]-
n5~7x
private static Sort[] impl=new Sort[]{ N%k6*FBp~
new InsertSort(), M(alc9tn
new BubbleSort(), ju-tx :
new SelectionSort(), Oist>A$Z
new ShellSort(), S}Q/CT?au
new QuickSort(), VM1`:1Z:$
new ImprovedQuickSort(), ebSG|F
new MergeSort(), TM1isZ
new ImprovedMergeSort(), M6 W{mek
new HeapSort() ?W*{%my
}; Nj<}t/e
F?wfh7q
public static String toString(int algorithm){ 4Y)rgLFj
return name[algorithm-1]; *,:>EcDr
} q*|H*sS
Sd!!1as
public static void sort(int[] data, int algorithm) { XvU^DEfW
impl[algorithm-1].sort(data); PtUea
} `*J;4Ju@
\<}4D\qz
public static interface Sort { v\3:R,|'
public void sort(int[] data); arR9uxP
} _R,VNk
Pd<s#
public static void swap(int[] data, int i, int j) { &p)]Cl/`
int temp = data; xpWx6
data = data[j]; X2? ^t]-N
data[j] = temp; ZH:-.2*cj
} mUmU_L u8
} *v}8n95*2