[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; }W2FF
} O52B
int i1=l; b|SDg%e
int i2=mid+1; Fru&-T[
for(int cur=l;cur<=r;cur++){ ?3[Gh9g`
if(i1==mid+1) p**Sd[|
data[cur]=temp[i2++]; {KQ-QKxxS
else if(i2>r) >:o$h2
data[cur]=temp[i1++]; {}.M(nPtv;
else if(temp[i1] data[cur]=temp[i1++]; 7+!FZo{?
else dC'8orFG+
data[cur]=temp[i2++]; `O+}$wP
} =Msr+P9Ai
} 6zbqv6
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} VQ}N&H)`
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改进后的归并排序: p{@jM
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package org.rut.util.algorithm.support; +56N}MAs
-!@]z2uU
import org.rut.util.algorithm.SortUtil; p!oO}gE
0P_=Oy"l-
/** /penB[1i
* @author treeroot NL^;C3u
* @since 2006-2-2 ! 3 ;;6
* @version 1.0 Vs1H)T%
*/ 1k)31GEQw
public class ImprovedMergeSort implements SortUtil.Sort { dDu8n+(8 L
> J.q3
private static final int THRESHOLD = 10; *XUJv&ZN
'zJBp 9a%
/* :9H`O!VF
* (non-Javadoc) HNUpgNi
* i'cGB5-j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]EN+^i1F[
*/ j.]ln}b/'+
public void sort(int[] data) { AU$<W"%R
int[] temp=new int[data.length]; tDC?St1
mergeSort(data,temp,0,data.length-1); at|.Q*&a#
} } yb"/jp
tZXq<k9
private void mergeSort(int[] data, int[] temp, int l, int r) { wC>}9OM
int i, j, k; @vc9L
int mid = (l + r) / 2; <lkt'iT=Sz
if (l == r) A!$;pwn0
return; "cZ){w
if ((mid - l) >= THRESHOLD) *KV^X(/
mergeSort(data, temp, l, mid); >sm~te$5
else R+*-i+]Q#7
insertSort(data, l, mid - l + 1); R@df~
if ((r - mid) > THRESHOLD) uv|RpIve:
mergeSort(data, temp, mid + 1, r); qdPmTaak
else W-RqooEv
insertSort(data, mid + 1, r - mid); lRANXM
/Moyn"Kj{
for (i = l; i <= mid; i++) { v)j3YhY
temp = data; %zKTrsMZ
} +xL' LCx
for (j = 1; j <= r - mid; j++) { u<U8LR=)V5
temp[r - j + 1] = data[j + mid]; !#Pr'm/,mu
} {EjzJr>
int a = temp[l]; SgWLs%B
int b = temp[r]; 2!)|B ;y
for (i = l, j = r, k = l; k <= r; k++) { g#iRkz%l)&
if (a < b) { +Pc2`,pw|
data[k] = temp[i++]; ,.HS )<B
a = temp; |jI|},I
} else { gJH^f3
data[k] = temp[j--]; :@b=;
b = temp[j]; Dnl|B\
} }~v&
} a9uMgx}
} rDWwu'
/EW=OZ/
/** Wh)>E!~9
* @param data %oOSmt
* @param l v t_lM
* @param i #e[S+a
*/ (j(hr'f
private void insertSort(int[] data, int start, int len) { -]Ny-[P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yJ:rry
} FJp<J
} 7\AoMk}
} m;J'y2h =$
} yRivf.wH
j;<s!A#
堆排序： ]pWn%aGv*Y
vX?C9Fr2
package org.rut.util.algorithm.support; d"=)=hm!
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import org.rut.util.algorithm.SortUtil; sB*!Nf^y
v'Pbx
/** F]L96&
* @author treeroot ?BX}0RWMh7
* @since 2006-2-2 m f\tMik<
* @version 1.0 nKmf#
*/ L=@8Zi!2<
public class HeapSort implements SortUtil.Sort{ )+Yu7=S
|&MOus#v
/* (non-Javadoc) z.!u<hy(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pwvmb\
*/ ,z01*Yx
public void sort(int[] data) { y5j ;Daq
MaxHeap h=new MaxHeap(); x9o(q`N
h.init(data); *^iSP(dg
for(int i=0;i h.remove(); Xb~i?T;f
System.arraycopy(h.queue,1,data,0,data.length); Elt"tJ
} 9+b){W
tmQ,>
private static class MaxHeap{ 6st^-L
Us\Nmso z
void init(int[] data){ q26qY5D
this.queue=new int[data.length+1]; u"F{cA!B
for(int i=0;i queue[++size]=data; I%jlM0ZUI"
fixUp(size); BQ=JZ4&
} h05BZrE
} YB_fy8Tfx
:<H4hYt2
private int size=0; N>iNz[a q
jFl!<ooCo
private int[] queue; T3Sz<K$E
d/b\:[B@
public int get() { `NQ;|!
return queue[1]; ,E8g~ZUY9
} ey$H2zmo
^e]h\G
public void remove() { DB0?H+8t
SortUtil.swap(queue,1,size--); fjMmlp
fixDown(1); xP7mP+D
} It]GlxMX
file://fixdown JH#p;7;
private void fixDown(int k) { ^}UFtL i
int j; ny0]Q@
while ((j = k << 1) <= size) { P=a&>i
if (j < size %26amp;%26amp; queue[j] j++; wjTW{Bg~G
if (queue[k]>queue[j]) file://不用交换 w3;T]R*
break; |+Xh ^E
SortUtil.swap(queue,j,k); hbSKlb0d
k = j; Of-8n-
} EgRuB@lw76
} Rsx?8Y^5
private void fixUp(int k) { B}@CtVWFz
while (k > 1) { Lie= DD
int j = k >> 1; `,Fc271`
if (queue[j]>queue[k]) /Ri-iC >
break; 6%V#_]
SortUtil.swap(queue,j,k); Q6p75$SVq
k = j; R8Dn GR
} 0S\HO<~k
} )>N=B2P
lI3d _cU
} t1p[!53(
CQA^"Ll
} QrLXAK\5
pS8`OBenA
SortUtil： ;,Os3
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package org.rut.util.algorithm; q8&^E.K
E?jb?
import org.rut.util.algorithm.support.BubbleSort; M(:_(4~
import org.rut.util.algorithm.support.HeapSort; AgWG4C=
import org.rut.util.algorithm.support.ImprovedMergeSort; t'DIKug&
import org.rut.util.algorithm.support.ImprovedQuickSort; )o;n2T#O
import org.rut.util.algorithm.support.InsertSort; FX+^S?x.
import org.rut.util.algorithm.support.MergeSort; -h21
import org.rut.util.algorithm.support.QuickSort; qxHsmGV
import org.rut.util.algorithm.support.SelectionSort; -3SRGr
import org.rut.util.algorithm.support.ShellSort; w ; PV &M
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/** 6-\C?w A
* @author treeroot N::.o+1
* @since 2006-2-2 'EB5#
* @version 1.0 b{,vZhP-
*/ nIl<2H]F`
public class SortUtil { m@yx6[E#
public final static int INSERT = 1; 2\#~%D>[
public final static int BUBBLE = 2; zc1~q
public final static int SELECTION = 3; f.RwV+lq
public final static int SHELL = 4; 85](,YYz
public final static int QUICK = 5; zeuSk|O
public final static int IMPROVED_QUICK = 6; LufZ,
public final static int MERGE = 7; OQ _wsAA
public final static int IMPROVED_MERGE = 8; 3ZqtIQY`
public final static int HEAP = 9; <7oZV^nd *
7mYBxE/
public static void sort(int[] data) { /?C6oj1
sort(data, IMPROVED_QUICK); ~{D:vj4>
} 2vW@d[<J
private static String[] name={ wQU-r|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r]%.,i7~8
}; 30h1)nQ$h}
TZ:dY x
private static Sort[] impl=new Sort[]{ EU()Nnm2
new InsertSort(), ?D]T|=EZY
new BubbleSort(), #Y>d@
new SelectionSort(), w*AXD!}
new ShellSort(), e{,[\7nF
new QuickSort(), e0<L^|S
new ImprovedQuickSort(), leEzfbb{'.
new MergeSort(), ntF#x.1Pm
new ImprovedMergeSort(), 3M{b:|3/q
new HeapSort() v?h8-yed
}; (<#Ns W!z
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public static String toString(int algorithm){ !B&1{
return name[algorithm-1]; G/8G`teAZ
} V__n9L/t
wqp(E+&
public static void sort(int[] data, int algorithm) { tA9(N>[*
impl[algorithm-1].sort(data); 1;9 %L@
} CYC6:g|)
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public static interface Sort { #e;\Eap
public void sort(int[] data); 7033#@_
} s}":lXkrw
mQt?d?6
public static void swap(int[] data, int i, int j) { rVx?Yo1F'
int temp = data; :aMp,DfM]P
data = data[j]; !& xc.39
data[j] = temp; E%>){Y)
} _:l<4u!
} HltURTbI