[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; \~'+TW
} p*(]8pDC
int i1=l; V .VV:`S
int i2=mid+1; Fs)m;C
for(int cur=l;cur<=r;cur++){ .=4k'99,
if(i1==mid+1) a,*~wmg
data[cur]=temp[i2++]; d/`Q,Vl
else if(i2>r) UI.>BZ6}
data[cur]=temp[i1++]; uSK<{UT~3
else if(temp[i1] data[cur]=temp[i1++]; $WK~|+"{>
else ~gvw6e*[
data[cur]=temp[i2++]; {F+iL&e)
} n:[GK_
} 9dD;Z$x&Xk
zAdZXa[MRY
} ;?0r,0l2$
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改进后的归并排序: /*5lO;!s{
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package org.rut.util.algorithm.support; 9q!./)
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import org.rut.util.algorithm.SortUtil; ]pP [0S
yjxv D
/** 96 !e:TU
* @author treeroot q%A.)1<'_
* @since 2006-2-2 lGtTZcg
* @version 1.0 " )_-L8
*/ [boB4>.
public class ImprovedMergeSort implements SortUtil.Sort { kI>PaZ`i)
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private static final int THRESHOLD = 10; YE\s<$
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/* IQ"9#{o
* (non-Javadoc) !o&b:7
* _l;$<]re\k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z6xM(*vg
*/ @fxDe[J:
public void sort(int[] data) { Gt;59}
int[] temp=new int[data.length]; !q_fcd^c
mergeSort(data,temp,0,data.length-1); ,a/<t"
} Cn>RUGoUsI
u$?t |Ll
private void mergeSort(int[] data, int[] temp, int l, int r) { G(1y_t
int i, j, k; R s)Nz< d
int mid = (l + r) / 2; dLnMd0
if (l == r) sAz]8(Fi0
return; ]#VNZ#("
if ((mid - l) >= THRESHOLD) z(&~O;;N#
mergeSort(data, temp, l, mid); Fb{kql=
else E|fQbkfw
insertSort(data, l, mid - l + 1); oCftI':@
if ((r - mid) > THRESHOLD) o|BEY3|
mergeSort(data, temp, mid + 1, r); To"J>:l
else )2jBhT
insertSort(data, mid + 1, r - mid); 9c_h+XN?y
vCh/%7+
for (i = l; i <= mid; i++) { lP:ll])p2
temp = data; [10;Mg
} 5E!G
for (j = 1; j <= r - mid; j++) { =whYo?cE(
temp[r - j + 1] = data[j + mid]; W;Ei>~E
} `Mp-4)mn
int a = temp[l]; e):rr*
int b = temp[r]; H_CX5=Nq^
for (i = l, j = r, k = l; k <= r; k++) { mt(2HBNoz
if (a < b) { %!i|"FNc
data[k] = temp[i++]; .s!qf!{V`
a = temp; :"oQ _bLT
} else { 6X@$xe847[
data[k] = temp[j--]; `Mxi2Y{vp
b = temp[j]; 8XUm.nV
} xrPC
} c$>$2[*=
} (wRJ"Nwu
&m>sGCZ
/** 5/),HGxi
* @param data ?{ 0MF
* @param l ![,W?
* @param i CI )89`
*/ 3bi,9 >%
private void insertSort(int[] data, int start, int len) { 0cwb^ffN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NdW2OUxw"
} eaxp(VX?oy
} 4/Yk;X[jk
} u`]J]gE
} ~X`_g/5X
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堆排序： a\Ond#1p
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package org.rut.util.algorithm.support; kq SpZoV0'
9y~5@/32R
import org.rut.util.algorithm.SortUtil; D# "ppa}
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/** tC,R^${#
* @author treeroot #0WGSIht<
* @since 2006-2-2 H.HXwN/x
* @version 1.0 /Y>$w$S
*/ SeC[,
public class HeapSort implements SortUtil.Sort{ K6=i\
Vu/{Hr
/* (non-Javadoc) B3lP#ckh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SGd[cA Ko
*/ 02lI-xHe
public void sort(int[] data) { #]iSh(|8
MaxHeap h=new MaxHeap(); vt`V<3
h.init(data); 2k}" 52
for(int i=0;i h.remove(); P@m_tA%
System.arraycopy(h.queue,1,data,0,data.length); S<f]Y4A&
} J m5).
fR&;E
private static class MaxHeap{ 6,707h
'9+JaB
void init(int[] data){ \Tc<27-
this.queue=new int[data.length+1]; pE<@
for(int i=0;i queue[++size]=data; b=5"*=T{+
fixUp(size); [=})^t?8
} atW=xn
} UkE fuH
g/o@,_
private int size=0; `FjU2 O
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private int[] queue; "h-G=vo,kl
<}@*i
public int get() { T=EHue$
return queue[1]; `Dck$
} fL #e4
R|jt mI?
public void remove() { F ka^0
SortUtil.swap(queue,1,size--); (9#$za>
fixDown(1); *?2aIz"
} &DX&*Xq2
file://fixdown /Ria"lLv
private void fixDown(int k) { % Rv;e
int j; e;M#MkP7
while ((j = k << 1) <= size) { 8QYP\7}o
if (j < size %26amp;%26amp; queue[j] j++; jf`QoK
if (queue[k]>queue[j]) file://不用交换 )(?,1>k`Z
break; jvI!BZ
SortUtil.swap(queue,j,k); M@k8;_5
k = j; l@ amAusE
} xnuu#@f
} e ej:
private void fixUp(int k) { lo1<t<w`
while (k > 1) { D#=$? {w
int j = k >> 1; }#u.Of`6"
if (queue[j]>queue[k]) b6`_;Z
break; =RA8^wI
SortUtil.swap(queue,j,k); K@JGGgrE`!
k = j; kBh*@gf
} ~HFqAOr
} ;;^OKrzWW
>TB"Ez09
} G`/5=
kB2]Z}
} P}2i[m.*,
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SortUtil： 5^,"Ve|
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package org.rut.util.algorithm; &V`~ z e
ftr8~*]O
import org.rut.util.algorithm.support.BubbleSort; 9+"R}Nxv^
import org.rut.util.algorithm.support.HeapSort; ~`xaBz0q
import org.rut.util.algorithm.support.ImprovedMergeSort; gMGX)Y ,=/
import org.rut.util.algorithm.support.ImprovedQuickSort; }{R?i,j(
import org.rut.util.algorithm.support.InsertSort; CFLWo1
import org.rut.util.algorithm.support.MergeSort; UJ/=RBfkJ
import org.rut.util.algorithm.support.QuickSort; wWVLwp4-
import org.rut.util.algorithm.support.SelectionSort; $ $=N'Q
import org.rut.util.algorithm.support.ShellSort; c:J;Q){Xz
#j+0jFu
/** agbG)t0
* @author treeroot aUGRFK_6$
* @since 2006-2-2 E*sQ|" g
* @version 1.0 jc$gy`,F
*/ :t7M'BSm2z
public class SortUtil { #FZoi:'Q
public final static int INSERT = 1; 4x2 ;@Pd
public final static int BUBBLE = 2; !08\w@
public final static int SELECTION = 3; fEWXC|"
public final static int SHELL = 4; j3Sz+kOf,
public final static int QUICK = 5; 0SHF 8kek
public final static int IMPROVED_QUICK = 6; z]twh&^1L
public final static int MERGE = 7; P^)J^{r
public final static int IMPROVED_MERGE = 8; Z\\'0yuY(
public final static int HEAP = 9; ^Fn~@'
B24,;2J
public static void sort(int[] data) { tL#]G?0d
sort(data, IMPROVED_QUICK); pV^(8!+
} &OMe'P
private static String[] name={ e5GJ:2sH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !.EDQ1k
}; [z2jR(+`U
x%Fy1.
private static Sort[] impl=new Sort[]{ Wx`|u
new InsertSort(), [T6MaP?
new BubbleSort(), <`f~Z|/-_(
new SelectionSort(), oEuV&m|yX
new ShellSort(), :L6,=#
new QuickSort(), ru#CywK{{;
new ImprovedQuickSort(), 7 {n>0@_
new MergeSort(), dsUt[z1w5
new ImprovedMergeSort(), k"L?("~
new HeapSort() ZLS\K/F>>=
}; xoYaL
G@N-+
public static String toString(int algorithm){ smJ#.I6/L
return name[algorithm-1]; O$K?2-
} O-N@HZC
tLD(%s_
public static void sort(int[] data, int algorithm) { GGWdMGI/
impl[algorithm-1].sort(data); 4g "_E
} zz7#gU
ssx#\
public static interface Sort { (QFu``ae+
public void sort(int[] data); <y!(X"n`
} .szc-r{
/7o{%~O
public static void swap(int[] data, int i, int j) { 9R1S20O
int temp = data; u&npUw^Va
data = data[j]; u&Lp
data[j] = temp; 1UwpLd
} =iFI@2
} 8wX|hK!Gz