[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; J)148/
} JGLjx"Y
int i1=l; JA")L0a_
int i2=mid+1; #z(JYw,
for(int cur=l;cur<=r;cur++){ Y{Yp N
if(i1==mid+1) vX9B^W||x
data[cur]=temp[i2++]; #]g9O?0$
else if(i2>r) &efwfnG<
data[cur]=temp[i1++]; J2vaKl
else if(temp[i1] data[cur]=temp[i1++]; 31FQ=(K
else Vm3e6Y,K
data[cur]=temp[i2++]; c:$W5j('Z
} `S&$y4|Vs
} |Z"5zL10
r@|{mQOxa
} CO)BF%?B
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改进后的归并排序: XBTtfl &
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package org.rut.util.algorithm.support; gG>|5R0
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import org.rut.util.algorithm.SortUtil; BLno/JK0}
D09/(%4j
/** NHL -ll-R
* @author treeroot 96 oztUK
* @since 2006-2-2 ;$0)k(c9
* @version 1.0 H&yK{0H
*/ ec$kcD!
public class ImprovedMergeSort implements SortUtil.Sort { cb9ndZ)v.
{[i 37DN
private static final int THRESHOLD = 10; fw[Z7`\Q5
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/* 8M"0o}wx
* (non-Javadoc) 0\Q/$#3
* Z*M]AvO+#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fq-AvU
*/ McXid~
public void sort(int[] data) { IM^K]$q$47
int[] temp=new int[data.length]; A3;}C+K
mergeSort(data,temp,0,data.length-1); jTDaW8@L
} 0Ud.u
2#^@awJ ?
private void mergeSort(int[] data, int[] temp, int l, int r) { u>YC4&
int i, j, k; Cq<a|t
int mid = (l + r) / 2; a$7}41F[~s
if (l == r) KA"D2j9wn
return; ,g"[7Za
if ((mid - l) >= THRESHOLD) &:}{?vU
mergeSort(data, temp, l, mid); 2v;F@fUB.
else [1 ?
insertSort(data, l, mid - l + 1); ,[Bv\4Ah
if ((r - mid) > THRESHOLD) Bq20U:f
mergeSort(data, temp, mid + 1, r); A-8[8J
else `Tt;)D
insertSort(data, mid + 1, r - mid); )J['0DUrZK
rEM#J"wF
for (i = l; i <= mid; i++) { $;1TP|
temp = data; RTEzcJ>
} NJe^5>4`
for (j = 1; j <= r - mid; j++) { G(;C~kHX
temp[r - j + 1] = data[j + mid]; 6oQSXB@
} -=+@/@nV
int a = temp[l]; 8ph*S&H
int b = temp[r]; <z=d5g{n
for (i = l, j = r, k = l; k <= r; k++) { 5*n3*rbU:
if (a < b) { k3w(KH@
data[k] = temp[i++]; 5 wT e?
a = temp; .5'_5>tkv
} else { 2< "-
data[k] = temp[j--]; {FrcpcrQa
b = temp[j]; %]iDhXLr
} g aq"+@fH
} -q8R'?z[
} y|e@zf
gaIN]9wLm
/** ]{/1F:bcQ
* @param data Y[8GoqE|
* @param l L PDx3MS
* @param i 'on8r*
*/ ;:%*h2
private void insertSort(int[] data, int start, int len) { zFq8xw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hl3%+f
} Zdm7As]
} XEB1%. p
} ';\v:dP
} &t1Uk[
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堆排序： `F^~*FnR,B
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package org.rut.util.algorithm.support; {tN?)~ZQ
WqHsf1?N
import org.rut.util.algorithm.SortUtil; -%g$~MZ?'
5g$]ou
/** k^Gf2%k
* @author treeroot RTJ\|#w
* @since 2006-2-2 t.ci!#/d
* @version 1.0 !qQB}sAf
*/ &.ilku/
public class HeapSort implements SortUtil.Sort{ V=?qU&r<+
k v>rv37u
/* (non-Javadoc) lDV}vuM<4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SdJGhU
*/ 5xsGSoa+
public void sort(int[] data) { Kz>Bw;R(
MaxHeap h=new MaxHeap(); EV$$wrohQ`
h.init(data); GjfPba4>
for(int i=0;i h.remove(); T"tR*2HwSd
System.arraycopy(h.queue,1,data,0,data.length); $1F$3"k
} G 5T{*
!L=RhMI
private static class MaxHeap{ +'@j~\>^yJ
nc.(bb),
void init(int[] data){ qpCNvhi
this.queue=new int[data.length+1]; ]m(C}}
for(int i=0;i queue[++size]=data; ma%PVz`I;9
fixUp(size); W{v{sQg
} s[}4Q|s%
} .EXe3!J)!
:|V`QM
private int size=0; T[<deQ
PE\.JU
private int[] queue; ,ezC}V0M
RM(MCle}
public int get() { jmH=W)
return queue[1]; gjGKdTr'
} I8s%wY9
W|yFjE&dr
public void remove() { 68 *~5]
SortUtil.swap(queue,1,size--); vK10p)ZV
fixDown(1); 9bxBm
} }5??n~:*5
file://fixdown Pcs62aE
private void fixDown(int k) { tS@J)p+_(
int j; @}8~TbP
while ((j = k << 1) <= size) { b;O@|HK&~
if (j < size %26amp;%26amp; queue[j] j++; x&N!SU6
if (queue[k]>queue[j]) file://不用交换 B'kV.3t
break; s;9>YV2at
SortUtil.swap(queue,j,k); @7fx0I'n
k = j; f-BEfC,}'
} UgBD|~zu
} @_L:W1[
private void fixUp(int k) { wyVQV8+&>
while (k > 1) { A;'*>NS
int j = k >> 1; 'ZUB:R@[
if (queue[j]>queue[k]) 6iZ:0y0t+6
break; ,e{|[k
SortUtil.swap(queue,j,k); (=/%_jj
k = j; }R\9ybv
} l?rT_uO4
} dZ"B6L!^(
c'XvZNf .C
} @'ln)RT,
M;$LB@h
} TA"4yri=7x
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SortUtil： V|njgcn d
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package org.rut.util.algorithm; #zL0P>P'a
N;6@f*3_i
import org.rut.util.algorithm.support.BubbleSort; c@ea ;Cv
import org.rut.util.algorithm.support.HeapSort; nbhzLUK
import org.rut.util.algorithm.support.ImprovedMergeSort; n1mqe*Mvs/
import org.rut.util.algorithm.support.ImprovedQuickSort; ?;c&5'7ct
import org.rut.util.algorithm.support.InsertSort; <8SRt-Cr
import org.rut.util.algorithm.support.MergeSort; KVC$o+<'`%
import org.rut.util.algorithm.support.QuickSort; S7A[HG;
import org.rut.util.algorithm.support.SelectionSort; .bT+#x
import org.rut.util.algorithm.support.ShellSort; YM(`E9{h
_Cd_i[K[
/** Tam\,j
* @author treeroot ,]\:]Y&?
* @since 2006-2-2 Vjc*D]
* @version 1.0 ^-|yF2>`
*/ 3!OO_
public class SortUtil { MUeS8:q-N
public final static int INSERT = 1; !K~L&.\T
public final static int BUBBLE = 2; `~.0PnHf
public final static int SELECTION = 3; UyWKE<
public final static int SHELL = 4; )HFl 0[vT
public final static int QUICK = 5; TfFuHzZZ
public final static int IMPROVED_QUICK = 6; _Q $D6+
public final static int MERGE = 7; )}KQtkU8:
public final static int IMPROVED_MERGE = 8; L 2Z9g`>
public final static int HEAP = 9; 1,/L&_=_A
m$UrY(6d
public static void sort(int[] data) { {Yp;R
sort(data, IMPROVED_QUICK); .AzGPcJY
} 5V($|3PI
private static String[] name={ ,M)NC%0X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bns([F
}; R06zca
R'.YE;leBG
private static Sort[] impl=new Sort[]{ &M6cCT]&M
new InsertSort(), y9>?
new BubbleSort(), 2|8&=K /
new SelectionSort(), U_/<tWl\[3
new ShellSort(), sXmZ0Dv
new QuickSort(), "?yu^
new ImprovedQuickSort(), j$f`:A
new MergeSort(), @uWPo2
new ImprovedMergeSort(), JuD$CHg;#
new HeapSort() FQ72VY
}; &7gE=E(M
:2\H>^uV
public static String toString(int algorithm){ s)e'}y
return name[algorithm-1]; =u+.o<
} N-+`[8@(P<
~H0WHqcy
public static void sort(int[] data, int algorithm) { #f 4"
impl[algorithm-1].sort(data); k/|j e~$
} 3cp"UU}.
wU|Y`wJmF
public static interface Sort { "* Qwaq_
public void sort(int[] data); v8<MAq
} ZV=)`E`I|
NyJ=^=F#
public static void swap(int[] data, int i, int j) { @$ea-fK??
int temp = data; ~ 3HI;
data = data[j]; z [qO5z~I
data[j] = temp; }k-rOi'jL
} -i}@o1o\
} b,7@)sZ*