[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; 4uy:sCmu
} ,We'AR3X
int i1=l; @CNe)&U
int i2=mid+1; 0/TP`3$X#"
for(int cur=l;cur<=r;cur++){ efXiZ
if(i1==mid+1) sp8P[W1a
data[cur]=temp[i2++]; `x:8m?q05
else if(i2>r) Rn9e#_Az
data[cur]=temp[i1++]; p{0NKyOvU
else if(temp[i1] data[cur]=temp[i1++]; L{F[>^1Sb
else GJj}|+|
data[cur]=temp[i2++]; 3;Y9<
} eo&^~OVT
} 5v_vv'~
9YEE.=]T
} yBkcYHT
wY xk[)&Y
改进后的归并排序: 5Ei4$T
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package org.rut.util.algorithm.support; }/J<#}t
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import org.rut.util.algorithm.SortUtil; (U([T-H
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/** opfg %*
* @author treeroot v7b+
* @since 2006-2-2 . ytxe!O
* @version 1.0 a%*W( 4=Y
*/ }P\J?8
public class ImprovedMergeSort implements SortUtil.Sort { #I}w$j i
AOv>O52F/Q
private static final int THRESHOLD = 10; y"Ios:v@-
9][A1+"
/* apwA
* (non-Javadoc) DDBf89$\
* Nz;f| 2h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w[]\%`69}Z
*/ S5/p3;O\c
public void sort(int[] data) { }DFZ9,gQ
int[] temp=new int[data.length]; oCSJ<+[(C
mergeSort(data,temp,0,data.length-1); 7-("ppYX=
} -GODM128 ^
on.m '-s
private void mergeSort(int[] data, int[] temp, int l, int r) { :V~ AjV
int i, j, k; -'rb+<v
int mid = (l + r) / 2; B4t,@,\O
if (l == r) iLk"lcX
return; }e-D&U
if ((mid - l) >= THRESHOLD) 4vyJ<b
mergeSort(data, temp, l, mid); ,% *Jm
else jhB+ ]
insertSort(data, l, mid - l + 1); 8d[!"lL
if ((r - mid) > THRESHOLD) 1xjw=
mergeSort(data, temp, mid + 1, r); eCwR }m?_
else M5c *vs
insertSort(data, mid + 1, r - mid); ~F13}is
O2S{*D={
for (i = l; i <= mid; i++) { QRHM#v S
temp = data; T854}RX[{
} pGP$2
for (j = 1; j <= r - mid; j++) { q8H9au&/
temp[r - j + 1] = data[j + mid]; UQnv#a>
} Bxk2P<d
int a = temp[l]; AH|'{
int b = temp[r]; S4D~`"4$/
for (i = l, j = r, k = l; k <= r; k++) { yX1OJg[s,
if (a < b) { )NnkoCNeE
data[k] = temp[i++]; 9d8U@=
a = temp; (|sqN8SbA
} else { YJ{_%z|U
data[k] = temp[j--]; G\#dMCk?
b = temp[j]; (``|5;T\
} @T)>akEOt
} I 8 Ls_$[
} C8$/z>tQ
ni-4~k
/** qhOV>j,d
* @param data v2}>/b)
* @param l G&#l3bkQ
* @param i W{nDmG`yp
*/ iJzW3%E
private void insertSort(int[] data, int start, int len) { 28O3N;a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FmhN*ZXr#
} crU]P $a
} ?}<Wmy2A
} Gt;U9k|i
} Kbcr-89Gv~
g&d tOjM
堆排序： yOE N*^6
2$1D+(5;
package org.rut.util.algorithm.support; P|;=dX#-
=:Lc-y>
import org.rut.util.algorithm.SortUtil; -}P/<cu:
kRB2J3Nt.
/** 89[OaT_hs
* @author treeroot Jl{g"N{2u'
* @since 2006-2-2 ;{ESo?$*
* @version 1.0 Uc5BNk7<=
*/ d5 U+]g
public class HeapSort implements SortUtil.Sort{ V,>uM >$
e*pYlm
/* (non-Javadoc) p"o_0{8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FoGSCg%
*/ }+BbwBm&
public void sort(int[] data) { jmva0K},SE
MaxHeap h=new MaxHeap(); A IsXu"
h.init(data); a'YK1QX
for(int i=0;i h.remove(); R;F z"J
System.arraycopy(h.queue,1,data,0,data.length); K6e_RzP,.w
} 9Xeg&Z|!
mY!&*nYn|
private static class MaxHeap{ ZR@PqS+O/
/PgcW
void init(int[] data){ h|XLL|:
this.queue=new int[data.length+1]; xJF}6yPm@
for(int i=0;i queue[++size]=data; }XIUz|
fixUp(size); F@jyTIS^
} AOR(1Qyo
} WcKL=Z?(
[qQ~\]
private int size=0; uI+^8-HZ;
+4m~D`fqt[
private int[] queue; 46M?Gfd,X
_.K<#S
public int get() { ^HI}bS1+|
return queue[1]; S_Ug=8r4
} Nt P=m @
v="2p8@F
public void remove() { -+Ab[
SortUtil.swap(queue,1,size--); Zh3hCxXa
fixDown(1); GJbU1k]
} U+'h~P'4
file://fixdown EmubpUS;
private void fixDown(int k) { U8icP+Y
int j; i9quP"<9
while ((j = k << 1) <= size) { }@avGt;v
if (j < size %26amp;%26amp; queue[j] j++; o+ 0"@B
if (queue[k]>queue[j]) file://不用交换 Tq`rc"&7u
break; 2JS&zF
SortUtil.swap(queue,j,k); 7S)u7
k = j; v{*#
} o2r)K AA
} 9M!J7 W
private void fixUp(int k) { QzX|c&&>u2
while (k > 1) { 3( `NHS~h
int j = k >> 1; 2'5%EQW;0y
if (queue[j]>queue[k]) t&L+]I'P3
break; k\`~v$R3
SortUtil.swap(queue,j,k); P*zOt]T
k = j; %W:]OPURK
} @?\[M9yK
} xix:= a
Zm~oV?6
} euc|G Xs
c2d=dGP>~f
} :{ Q[kYj
wJKP=$6n_
SortUtil： P<{N)H 2r
^i!6q9<{e
package org.rut.util.algorithm; _"R /k`8
cop \o4ia
import org.rut.util.algorithm.support.BubbleSort; t?<pyw $
import org.rut.util.algorithm.support.HeapSort; 5$.e5y<&(
import org.rut.util.algorithm.support.ImprovedMergeSort; Y}Gf%Xi,
import org.rut.util.algorithm.support.ImprovedQuickSort; X23#y7:
import org.rut.util.algorithm.support.InsertSort; eJ O+MurO
import org.rut.util.algorithm.support.MergeSort; E ) iEWc
import org.rut.util.algorithm.support.QuickSort; c-gpO|4>
import org.rut.util.algorithm.support.SelectionSort; x\MzMQ#Bf
import org.rut.util.algorithm.support.ShellSort; !HPye@Ua
`$N()P
/** c mI&R(
* @author treeroot WfF~\DlrD
* @since 2006-2-2 -U#e
* @version 1.0 bw& U[|A0%
*/ (^4V]N&
public class SortUtil { P>s3Rh3:
public final static int INSERT = 1; >GV= %
public final static int BUBBLE = 2; ?z$^4u3
public final static int SELECTION = 3; Bc^MZ~+ip
public final static int SHELL = 4; suP/I?4'@
public final static int QUICK = 5; />,KWHR|:
public final static int IMPROVED_QUICK = 6; ltH?Ew<]
public final static int MERGE = 7; jj$D6f/mOG
public final static int IMPROVED_MERGE = 8; py8)e7gX=
public final static int HEAP = 9; [@LA<Z_
\2Atm,#4
public static void sort(int[] data) { Q"+)xj
sort(data, IMPROVED_QUICK); Nxd<#p
} Hk8pKpn3
private static String[] name={ 'l7ey3B%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8n1<nS<
}; 7)U08"
/+g9C(['
private static Sort[] impl=new Sort[]{ `: R7jf
new InsertSort(), [zv@}@$
new BubbleSort(), >q!:*
new SelectionSort(), f%2>pQTq@)
new ShellSort(), 3{*nG'@Mal
new QuickSort(), 8,DY0PGP
new ImprovedQuickSort(), H0P:t(<Gt
new MergeSort(), <T|?`;K
new ImprovedMergeSort(), a\@k5?
new HeapSort() A0f98?j^
}; jMV9r-{*+
de<T5/
public static String toString(int algorithm){ zlhHSyK
return name[algorithm-1]; W8><
} nA)KRCi
r]<?,xx[
public static void sort(int[] data, int algorithm) { ![l`@NH[U
impl[algorithm-1].sort(data); )U5Ba^"fI
} WPpS?
7q;wj~
public static interface Sort { &]_2tN=S$
public void sort(int[] data); pX LXkF?
} 8uD%
$FM:8^
public static void swap(int[] data, int i, int j) { E# UAC2Q
int temp = data; kx.8VUoM V
data = data[j]; "eb+O
data[j] = temp; 1[k.apn
} *< ?~
} N6thbH@