[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; U9Q[K`
} ) :Px`] 5
int i1=l; f'qM?GlET
int i2=mid+1; _(8N*q*w
for(int cur=l;cur<=r;cur++){ uBC#4cX`D*
if(i1==mid+1) CwyE8v
data[cur]=temp[i2++]; j<9^BNl
else if(i2>r) *<?KOM
data[cur]=temp[i1++]; ^?A>)?Sq
else if(temp[i1] data[cur]=temp[i1++]; gd]_OY7L
else N f}ZG
data[cur]=temp[i2++]; [<Mls@?
} vAOThj)
} Wkr31Du\K
Vyc
} BE0Xg
%;Z_`W
改进后的归并排序: A,7* 52U
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package org.rut.util.algorithm.support; 0j}@lOt(
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import org.rut.util.algorithm.SortUtil; BgB0
[g=4'4EZc
/** 8MBY3F
* @author treeroot %/_E8GE
* @since 2006-2-2 +vV?[e
* @version 1.0 , 0?_? GO
*/ ^$rqyWZYp
public class ImprovedMergeSort implements SortUtil.Sort { <u?\%iJ"
6\y?+H1
private static final int THRESHOLD = 10; e#WASHZN
OL@$RTh
/* {"rL3Lk
* (non-Javadoc) @f,/K1k
* )U8=-_m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZK<c(,oZ^
*/ Z]Cd>u
public void sort(int[] data) { IL?"g{w
int[] temp=new int[data.length]; (I{+%
mergeSort(data,temp,0,data.length-1); bcAk$tA2
} KsqS{VVCh
1].m4vC
private void mergeSort(int[] data, int[] temp, int l, int r) { 3S%/>)k
int i, j, k; k? ,/om1
int mid = (l + r) / 2; U_UN& /f
if (l == r) NZ+TTMv
return; "od2i\
if ((mid - l) >= THRESHOLD) %"|W qxv
mergeSort(data, temp, l, mid); Iy5)SZ'
else \"Qa)1|
insertSort(data, l, mid - l + 1); w.+G+r=
if ((r - mid) > THRESHOLD) ~{{7y]3M-
mergeSort(data, temp, mid + 1, r); `84,R!
else V%`\x\Xat
insertSort(data, mid + 1, r - mid); Ac}5,
H}8kku>7
for (i = l; i <= mid; i++) { ]7q|) S\
temp = data; EK\xc'6M
} `@So6%3Y|
for (j = 1; j <= r - mid; j++) { ws$kwSHq
temp[r - j + 1] = data[j + mid]; xA0=C
} m;U_oxb
int a = temp[l]; C[><m2T
int b = temp[r]; F8\JL %
for (i = l, j = r, k = l; k <= r; k++) { V~$?]Z%_
if (a < b) { hdH3Jb_hl(
data[k] = temp[i++]; FgR9$ is+
a = temp; FB3}M)G>M
} else { Q0g^%
data[k] = temp[j--]; S2#@j#\
b = temp[j]; aeEio;G1
} '<6DLtZl
} #f_.
} 02YmV%
$Xs`'>,"
/** [&lH[:Y#
* @param data Sb}=j;F
* @param l Kv ajk~
* @param i \Y6r !D9
*/ 6yC4rX!a
private void insertSort(int[] data, int start, int len) { | _nBiHjNn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e^N}(Kpy
} \AB)L{
} nUCOHVI7
} ^3QJv{)Q
} {9cjitl
zT>BC}~.b
堆排序： lx> ."rW
lnK#q.]
package org.rut.util.algorithm.support; .kB!',v\
/?V-
import org.rut.util.algorithm.SortUtil; $KS!vS7
qTGi9OP6/
/** gN]\#s@[
* @author treeroot ~9@83Cs2
* @since 2006-2-2 HKVtO%&
* @version 1.0 VuD{t%Jb
*/ :4r*Jju<V
public class HeapSort implements SortUtil.Sort{ AP ]`'C
oFsV0 {x%)
/* (non-Javadoc) ju1B._48
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |w5,%#AeO$
*/ {TDZDH
public void sort(int[] data) { ((=T E
MaxHeap h=new MaxHeap(); aYc^ 9*7
h.init(data); !.499H3
for(int i=0;i h.remove(); !1Ht{cA0
System.arraycopy(h.queue,1,data,0,data.length); wEQZ9?\
} HumL(S'm
7"OJ,Mx%
private static class MaxHeap{ xl@~K^c]
bL5u;iy)
void init(int[] data){ dk0} q6~
this.queue=new int[data.length+1]; {vQ:4O!:
for(int i=0;i queue[++size]=data; BKYyc6iE
fixUp(size); fm!\**Q1
} |OuIQhoE
} _ER. AKY
`A-
private int size=0; vhDtjf/*
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private int[] queue; MSB/O.
p =-~qBw
public int get() { (k_9<Yb3
return queue[1]; kM(m$Oo.
} )4>7X)j>
ARG8\qU
public void remove() { t/l<X]o
SortUtil.swap(queue,1,size--); P(a}OlG
fixDown(1); %D~Mij
} R\]C;@J<
file://fixdown \9`.jB~<
private void fixDown(int k) { *Rxn3tR7
int j; !'B='].
while ((j = k << 1) <= size) { \u;`Lf
if (j < size %26amp;%26amp; queue[j] j++; 3rR1/\
if (queue[k]>queue[j]) file://不用交换 `$q0fTz
break; IR8yE`(h
SortUtil.swap(queue,j,k); 7y_<BCx h
k = j; \ _?d?:#RD
} s'bTP(wl9
} ,5AEtoF
private void fixUp(int k) { -aV(6i*n
while (k > 1) { Q 9E.AN
int j = k >> 1; &y7xL-xP
if (queue[j]>queue[k]) +k[w)7Q
break; ls~9qkAyLx
SortUtil.swap(queue,j,k); ;v/un
k = j; !OMCsUZ
} ~wO-Hgd
} p|@#IoA/e
N|3#pHm@
} }$ Kd-cj+
CTxP3a9]
} {qOqtkj
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SortUtil： }Yc5U,A;
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package org.rut.util.algorithm; |kTq &^$
WBb*2
import org.rut.util.algorithm.support.BubbleSort; !Uv>>MCr
import org.rut.util.algorithm.support.HeapSort; l]gW_wUQd
import org.rut.util.algorithm.support.ImprovedMergeSort; f.$*9Fkw
import org.rut.util.algorithm.support.ImprovedQuickSort; ZB}A^X
import org.rut.util.algorithm.support.InsertSort; oxdX2"WwU
import org.rut.util.algorithm.support.MergeSort; B{p74 >
import org.rut.util.algorithm.support.QuickSort; zg$ag4%Qgg
import org.rut.util.algorithm.support.SelectionSort; >8b%*f8R
import org.rut.util.algorithm.support.ShellSort; @4]{ZUV
~O]{m,)n
/** Q7i(M >|O
* @author treeroot A(n#k&W1fZ
* @since 2006-2-2 0Ue~dVrM(?
* @version 1.0 N Hn#c3o
*/ _dmG#_1
public class SortUtil { 96P&+
public final static int INSERT = 1; 2+Oz$9`.
public final static int BUBBLE = 2; 9hh~u -8L
public final static int SELECTION = 3; $PAAmaigi
public final static int SHELL = 4; !Ce!D0Tx
public final static int QUICK = 5; .2s^8gO
public final static int IMPROVED_QUICK = 6; *2rc Y
public final static int MERGE = 7; tGzp=PyA
public final static int IMPROVED_MERGE = 8; hljKBx~
public final static int HEAP = 9; _O;4>
CGkx_E]
public static void sort(int[] data) { B^/k`h6J
sort(data, IMPROVED_QUICK); o\; hF3
} \9uK^oS
private static String[] name={ uPjp5;V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `uZMln @
}; $15H_X*!
"_&c[VptWi
private static Sort[] impl=new Sort[]{ +S`cUn7
new InsertSort(), !IA\c(c^
new BubbleSort(), .!Kqcz% A
new SelectionSort(), \CVHtV
new ShellSort(), Xo&\~b#-
new QuickSort(), cbs ;
new ImprovedQuickSort(), H8=:LF
new MergeSort(), !l Egta[Ql
new ImprovedMergeSort(), F^aD#
new HeapSort() Tku6X/LF
}; `j!_tE`
y7%SHYC p[
public static String toString(int algorithm){ gVI`&W__,
return name[algorithm-1]; %QEyvl4
} uG +ZR: _
M&<qGV$A
public static void sort(int[] data, int algorithm) { Px9 K
impl[algorithm-1].sort(data); ;(A-
} scYqU7$%T
8R:Glif
public static interface Sort { O0s!3hKu
public void sort(int[] data); 08D:2 z1z
} FSAX,Y
C"%B>e
public static void swap(int[] data, int i, int j) { os&FrtDg
int temp = data; vxLr034
data = data[j]; [HUK 9hG
data[j] = temp; %u_dxpx
} kytHOn#
} /y6f~F