[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; 0T2h3,
} Gv[W)+3f
int i1=l; )@.bkzW
int i2=mid+1; WTPp/Nq'
for(int cur=l;cur<=r;cur++){ )c=R)=N
if(i1==mid+1) FUzIuz 6
data[cur]=temp[i2++]; pq[RH-{
else if(i2>r) BQWEC,*N
data[cur]=temp[i1++]; 8[i#x|`g
else if(temp[i1] data[cur]=temp[i1++]; \3dMA_5
else md7Aqh
data[cur]=temp[i2++]; V-a/%_D
} V%k[S|f3
} {= Dtajz
rP.qCl+J
} <tK6+isc
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改进后的归并排序: H=]$9ZH!
r,=xI`XH
package org.rut.util.algorithm.support; e#Jx|Ej=
#.p^S0\pw
import org.rut.util.algorithm.SortUtil; lbrob' '+
r(pp =
/** u2K{3+r`'
* @author treeroot B`OggdE
* @since 2006-2-2 9Ue3 %?~c
* @version 1.0 1 GUF,A+_O
*/ r$=MBeT
public class ImprovedMergeSort implements SortUtil.Sort { _F xq
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private static final int THRESHOLD = 10; .!0),KmkK
@K36?d]e
/* a$Eqe_
* (non-Javadoc) F7J-@T<
* &,+G}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `*e',j2}UU
*/ 5sC{5LJzC
public void sort(int[] data) { q /EK]B
int[] temp=new int[data.length]; k:PO"<-U
mergeSort(data,temp,0,data.length-1); `),7*gn*)
} N;tUrdgQ
x<60=f[O2R
private void mergeSort(int[] data, int[] temp, int l, int r) { r/=v;4.W
int i, j, k; !q~s-~d^
int mid = (l + r) / 2; #C,M8~Q7
if (l == r) 4xhV +Y
return; )hj77~{+
if ((mid - l) >= THRESHOLD) 2D`@$)KL
mergeSort(data, temp, l, mid); NylN-X7[#
else /s& xI
insertSort(data, l, mid - l + 1); QlIg'B6
if ((r - mid) > THRESHOLD) p3I{
mergeSort(data, temp, mid + 1, r); )0`;leli
else =IV_yor
insertSort(data, mid + 1, r - mid); Fh& `v0
`g6XVa*%#
for (i = l; i <= mid; i++) { ;k^wn)JE$
temp = data; 7a0ZI
} `kIzT!HX
for (j = 1; j <= r - mid; j++) { G_zJuE$V
temp[r - j + 1] = data[j + mid]; kHd_q.
} O_0|Q@
int a = temp[l]; L q8}z-?
int b = temp[r]; {g\Yy(r
for (i = l, j = r, k = l; k <= r; k++) { sLK J<=0i
if (a < b) { Gm^@lWzG
data[k] = temp[i++]; EU]{S=T
a = temp; H,txbJ
} else { w/KHS#~
data[k] = temp[j--]; 1g9Qvz3
b = temp[j]; W%b<(T;
} M_+&XLnzsJ
} !y$Hr[v
} {%. _cR2
<`5>;Xn=
/** K"VphKvR
* @param data LtbL[z>]
* @param l EHkb{Q8
* @param i g 'c4&Do
*/ #)q}Jw4]j
private void insertSort(int[] data, int start, int len) { _CAWD;P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tY !fO>Fn~
} ~1wAk0G`n
} xB3;%Lc
} wx -NUTRim
} z %{>d#rw
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堆排序： [VIdw92
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package org.rut.util.algorithm.support; Gnp,~F"
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import org.rut.util.algorithm.SortUtil; |M#b`g$JO,
K`* 8*k{
/** cy7GiB2'
* @author treeroot 5^cPG" 4@
* @since 2006-2-2 'x<gC"0A
* @version 1.0 X'.}#R1
*/ !1+L0,I6
public class HeapSort implements SortUtil.Sort{ 2,puu2F
Z!G_" 3
/* (non-Javadoc) rJ ?Y~Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mm/U9hbp%
*/ I?dh"*Js&
public void sort(int[] data) { n|lXBCY7K
MaxHeap h=new MaxHeap(); h'^7xDw
h.init(data); 2/=CrK
for(int i=0;i h.remove(); )`F?{Sg
System.arraycopy(h.queue,1,data,0,data.length); #Bj{ 4OeV
} LdR}v%EH
*ntq;]
private static class MaxHeap{ 4Cke(G
'cy35M
void init(int[] data){ -'BJhi\Y]~
this.queue=new int[data.length+1]; O7ceSz
for(int i=0;i queue[++size]=data; [Av87!kJ!X
fixUp(size); !vfjo[v
} ySP1WK
} uljd)kLy4O
!FipKX
private int size=0; l-_voOP
| ctGxS9
private int[] queue; "p.MJxH
.x$+R%5U
public int get() { J6Hw05%0=
return queue[1]; . l RW
} ] M"{=z
?'CIt5n+\{
public void remove() { pA"x4\s
SortUtil.swap(queue,1,size--); DF%\1C>
fixDown(1); * gr{{c
} Z/sB72K1
file://fixdown P[n`X
private void fixDown(int k) { 3m#v|52oj
int j; Z66akr
while ((j = k << 1) <= size) { r1EccY
if (j < size %26amp;%26amp; queue[j] j++; gR.zL>=_5e
if (queue[k]>queue[j]) file://不用交换 ]p(+m_F
break; epCU(d*b
SortUtil.swap(queue,j,k); x?KgEcnw2X
k = j; {2R b^K
} %*e6@Hm
} V;L^q?v !
private void fixUp(int k) { _zI95
while (k > 1) { Kpz>si?CL
int j = k >> 1; 5,I'6$J
if (queue[j]>queue[k]) rK)So#'
break; ~;aSX1
SortUtil.swap(queue,j,k); +Qt=N6>
k = j; VxLq,$B76
} 2uZ <q?=
} ;E(gl$c:
@y;N u
} SOE#@{IXBa
dI5Z*"`R9
} ,]i ^/fT
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SortUtil： m/|>4~
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package org.rut.util.algorithm; pAtHU(}
q5 I2dNE
import org.rut.util.algorithm.support.BubbleSort; sVZb[|zSri
import org.rut.util.algorithm.support.HeapSort; (BVLlOo?J
import org.rut.util.algorithm.support.ImprovedMergeSort; (;$J5
import org.rut.util.algorithm.support.ImprovedQuickSort; PYkcGtVa_
import org.rut.util.algorithm.support.InsertSort; L=iaL[zdJ
import org.rut.util.algorithm.support.MergeSort; @%IZKYfc~
import org.rut.util.algorithm.support.QuickSort; ^*`{W4e]
import org.rut.util.algorithm.support.SelectionSort; u ?7(A%
import org.rut.util.algorithm.support.ShellSort; ;/N[tO?Q
Z_QSVH68A
/** !.zUY6
* @author treeroot xH;qJRHa
* @since 2006-2-2 LU_@8i:
* @version 1.0 9<k<HmkD
*/ i5?)E7-
public class SortUtil { HelC_%#^
public final static int INSERT = 1; /wK5YN.em
public final static int BUBBLE = 2; <&n3"
public final static int SELECTION = 3; 9U>ID{
public final static int SHELL = 4; &32qv` V_
public final static int QUICK = 5; 5@tpJ8E8$
public final static int IMPROVED_QUICK = 6; 7ks09Cy
public final static int MERGE = 7; ge`)sB,
public final static int IMPROVED_MERGE = 8; Cnd*%CPZ
public final static int HEAP = 9; s{NEP/QQJ
^TyusfOz
public static void sort(int[] data) { @es}bKP
sort(data, IMPROVED_QUICK); JS642T
} kWF4k
private static String[] name={ W:aAe%S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >a%NC'~rc
}; qDqIy+WR
+e)So+.W
private static Sort[] impl=new Sort[]{ ~2 T_)l?
new InsertSort(), V-}d-Y
new BubbleSort(), Xl#vVyO
new SelectionSort(), FZ #ngrT
new ShellSort(), WVftLIJ
new QuickSort(), T$06DS
new ImprovedQuickSort(), H:`W\CP7_
new MergeSort(), W([)b[-*
new ImprovedMergeSort(), -3qB,KT
new HeapSort() J{@gp,&e
}; X;w1@4!
Sr)/ Mf
public static String toString(int algorithm){ ZF51|b
return name[algorithm-1]; h76#HUBr!
} {dg3 qg~
z<+".sD'
public static void sort(int[] data, int algorithm) { 4(R O1VWsb
impl[algorithm-1].sort(data); a)(j68c
} ~{n_rKYV
@I]uK[qd
public static interface Sort { ci+Pg9sS
public void sort(int[] data); +AZ=nMgW
} H'<9;bD -
Nn ?BD4i
public static void swap(int[] data, int i, int j) { q5BJsw
int temp = data; (iP,F]
data = data[j]; (u]ft]z,-B
data[j] = temp; }1`Rq?@J
} 7\"-<z;kK
} Q[i;IbY