[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; -=tf)
} o!\Q,
int i1=l; ')bas#=uP
int i2=mid+1; 'V*ixK8R0
for(int cur=l;cur<=r;cur++){ ="k9 y
if(i1==mid+1) xD:t$~
data[cur]=temp[i2++]; TjUg8k
else if(i2>r) )@IDmz>
data[cur]=temp[i1++]; @y|ZXPC#
else if(temp[i1] data[cur]=temp[i1++]; X\z`S##kj
else AM[#AZv
data[cur]=temp[i2++]; MR) *Xh
} JTw< 4]
} vM.Y/,7S
\1[=t+/
} i42M.M6D$
@1`!}.Tk
改进后的归并排序: o~aK[
3?R56$-+
package org.rut.util.algorithm.support; z]^u@]@NC
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import org.rut.util.algorithm.SortUtil; x)wlp{rLf
5-=&4R\k
/** y@T0 jI
* @author treeroot ut<0-
* @since 2006-2-2 p)dD{+"/2
* @version 1.0 3@t&5UjwQ
*/ /M0A9ZT[
public class ImprovedMergeSort implements SortUtil.Sort { \!+#9sq0
![>j`i
private static final int THRESHOLD = 10; $$,/F
CTNeh%K;
/* dGNg[
* (non-Javadoc) 2"'<Yk9
* E1=WH-iA0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <]SI-
*/ BA5b;+o-
public void sort(int[] data) { ZFJqI
int[] temp=new int[data.length]; o'Uaz*-po
mergeSort(data,temp,0,data.length-1); _3;vir%)
} 3pV^Oe^9
o_(@v2G`
private void mergeSort(int[] data, int[] temp, int l, int r) { {\SJr:
int i, j, k; d,hKy2
int mid = (l + r) / 2; Hv>16W$_
if (l == r) prdlV)LTpY
return; ' )0eB:
if ((mid - l) >= THRESHOLD) F*0rpQ,*
mergeSort(data, temp, l, mid); 7,.3'cCL^
else @`IMR$'
insertSort(data, l, mid - l + 1); ib-)T7V`
if ((r - mid) > THRESHOLD) .# Jusd
mergeSort(data, temp, mid + 1, r); 5>S<9A|Q
else aw3 oG?3I
insertSort(data, mid + 1, r - mid); ,>AA2@6zMT
GY%2EM(
for (i = l; i <= mid; i++) { 9On0om>
temp = data; _#SCjFz
} (]Pr[xB
for (j = 1; j <= r - mid; j++) { ++m^z` D
temp[r - j + 1] = data[j + mid]; lCX*Q{s22
} )zKZ<;#y
int a = temp[l]; 4P>4d +
int b = temp[r]; Dh4EP/=z
for (i = l, j = r, k = l; k <= r; k++) { 'X$J+s}6&
if (a < b) { si!jB%^
data[k] = temp[i++]; Qw,{"J
a = temp; mZ[tB/
} else { S5,y!K]C~
data[k] = temp[j--]; %VSjMZ
b = temp[j]; ~+HZQv3Y
} 5C G ,l
} ~vL`[JiK
} O1 KT
Z ZMz0^V
/** I?z*.yA*
* @param data GY3g`M
* @param l KysJ3G.k\
* @param i )J"*[[e
*/ >$g+Gx\v4
private void insertSort(int[] data, int start, int len) { |)4aIa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RyN}Gz/YN
} FUD M]:XQ
} vhEXtjL
} Mq#sSBE<K
} z0v|%&IK
_[kZ:#
堆排序： CZ~%qPwDw
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package org.rut.util.algorithm.support; p bT sn
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import org.rut.util.algorithm.SortUtil; m,qMRcDF
0&W*U{0F\
/** e*Y>+*2y
* @author treeroot )M:pg%
* @since 2006-2-2 zDD1EycH
* @version 1.0 F.DRGi.i
*/ (c'kZ9&
public class HeapSort implements SortUtil.Sort{ T``O!>J
v=Y) A?
/* (non-Javadoc) 5>nbA8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'A#bBn,|
*/ jkrv2 `"
public void sort(int[] data) { jx?"m=`s:
MaxHeap h=new MaxHeap(); ?S~@Ea8/M
h.init(data); "L)=Y7Dx
for(int i=0;i h.remove(); kuZs30^
System.arraycopy(h.queue,1,data,0,data.length); q ?qpUPzD
} ,5 A&
i+Fk
private static class MaxHeap{ h%0FKi^
,iy;L_N
void init(int[] data){ Z'V"nhL
this.queue=new int[data.length+1]; rmq^P;At
for(int i=0;i queue[++size]=data; ]rY3bG'&
fixUp(size); zfBaB0P
} `Cv@16
} "(QI7:iM
tnn,lWu|
private int size=0; z^YL$
,xzSFs>2
private int[] queue; @Q%g#N
8#_"WzDw
public int get() { A $GiO
return queue[1]; -:jC.} Y
} 8K;wX%_,
)Z.M(P
public void remove() { g:&V9~FR
SortUtil.swap(queue,1,size--); Cr;d !=
fixDown(1); 8A,="YIt
} x$WdW+glZ-
file://fixdown l`' lqnhv
private void fixDown(int k) { /iwL$xQQ
int j; MB#KLTwnT
while ((j = k << 1) <= size) { A:JWUx
if (j < size %26amp;%26amp; queue[j] j++; % njcWVP;
if (queue[k]>queue[j]) file://不用交换 'C")X
break; n?EL\B
SortUtil.swap(queue,j,k); @XSxoUF\
k = j; ]ICBNJ
} 4hLv"R.
} /qeSR3WC
private void fixUp(int k) { c8=@s#
while (k > 1) { =I6u*$9<
int j = k >> 1; ywl7bU-f
if (queue[j]>queue[k]) M9J^;3Lrh
break; >.}ewz&9o
SortUtil.swap(queue,j,k); AY~~a)V
k = j; $(PWN6{\r^
} zB@@Gs>
} OpT0V]k^"9
XY*KWO
} Ze:Y"49S+>
'aAay*1
} rf:CB&u
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SortUtil： EvJ"%:bp
xy.di9
package org.rut.util.algorithm; ,TdL-a5
1$^=M[v
import org.rut.util.algorithm.support.BubbleSort; puPYM"
import org.rut.util.algorithm.support.HeapSort; ==W`qC4n?n
import org.rut.util.algorithm.support.ImprovedMergeSort; tG"lI/
import org.rut.util.algorithm.support.ImprovedQuickSort; 50Kv4a"
import org.rut.util.algorithm.support.InsertSort; lDd8dT-Q.
import org.rut.util.algorithm.support.MergeSort; 1r-#QuV#
import org.rut.util.algorithm.support.QuickSort; rQ!X
import org.rut.util.algorithm.support.SelectionSort; p#T^o]+
import org.rut.util.algorithm.support.ShellSort; "v9i;Ba>+
YJ[Jo3M@j0
/** c~=yD:$
* @author treeroot 7lJs{$ P
* @since 2006-2-2 R8K?!Z
* @version 1.0 ~H+W[r}
*/ R2%>y5dD
public class SortUtil { G"'[dL)N>
public final static int INSERT = 1; *\5o0~~8J
public final static int BUBBLE = 2; s/=.a2\
public final static int SELECTION = 3; ^HM9'*&KJ
public final static int SHELL = 4; B<A=U r
public final static int QUICK = 5; ~5xs$ub
public final static int IMPROVED_QUICK = 6; |x ~<Dc>0*
public final static int MERGE = 7; i(l'f#
public final static int IMPROVED_MERGE = 8; RgQ;fYS
public final static int HEAP = 9; x(UOt;
J91O$szA
public static void sort(int[] data) { M^$liS.D
sort(data, IMPROVED_QUICK); lbg^ 2|o~~
} V.8pxD5s
private static String[] name={ mn;Wqb/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &\_cU?0d
}; ?7:?OX
8pQ:B/3=
private static Sort[] impl=new Sort[]{ #!n"),3
new InsertSort(), +mqz)-x
new BubbleSort(), ^^{gn3xJ
new SelectionSort(), ,svj(HP$
new ShellSort(), K#LG7faj
new QuickSort(), RlH~<|XK
new ImprovedQuickSort(), XJ.ERLR.
new MergeSort(), .bT|:Q~@{
new ImprovedMergeSort(), \XUG-\$p
new HeapSort() =%Yw;%0)Y
}; YhzDi>hob
w=txSF&Qr
public static String toString(int algorithm){ IRxFcLk
return name[algorithm-1]; 1Z+\>~8
} =rrbS8To=
fcC?1M[BP~
public static void sort(int[] data, int algorithm) { >[U.P)7;
impl[algorithm-1].sort(data); *k7vm%#ns
} ;J)8#|
7rdPA9
public static interface Sort { pJK}9p=4`
public void sort(int[] data); |4XR [eX
} /h!Y/\kI
"V:24\vO
public static void swap(int[] data, int i, int j) { )7j CEA03
int temp = data; M-B-
data = data[j]; Yiq8>|
data[j] = temp; s=uWBh3J
} h{sY5d'D
} .LX8ko