[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; %h"< IA S.
} ({KAh?
int i1=l; _)E8XyzF
int i2=mid+1; qm=F6*@}
for(int cur=l;cur<=r;cur++){ 0xUj#)
if(i1==mid+1) {,FeNf46
data[cur]=temp[i2++]; " B{0-H+
else if(i2>r) rO$>zdmYHs
data[cur]=temp[i1++]; va(9{AXI
else if(temp[i1] data[cur]=temp[i1++]; [\9(@Bx
else 23$hwr&G\
data[cur]=temp[i2++]; |u"R(7N*
} ?ev G=S4>
} .p9h$z^
)m8>w6"
} rp#*uV9;
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改进后的归并排序: R0mT/h2
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package org.rut.util.algorithm.support; '1'1T5x~
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import org.rut.util.algorithm.SortUtil; bM^A9BxD
\a2oM$PX
/** o:DBOpS
* @author treeroot }8M`2HMFR
* @since 2006-2-2 Gu`Vk/&
* @version 1.0 **r?
*/ k^5Rf
public class ImprovedMergeSort implements SortUtil.Sort { |D`b7h
Y"kS!!C>[
private static final int THRESHOLD = 10; u7zB9iQ&
!VX_'GyK
/* G=!bM(]R~
* (non-Javadoc) {2k< k(,
* 'eDgeWt/CQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qj"syO
*/ bC>>^?U1m
public void sort(int[] data) { pt%~,M _
int[] temp=new int[data.length]; Ym{%"EB
mergeSort(data,temp,0,data.length-1); $v<hW A]>
} gDNTIOV
csX*XiDWm
private void mergeSort(int[] data, int[] temp, int l, int r) { gQd=0"MV
int i, j, k; d<GG(
int mid = (l + r) / 2; y7)[cvB
if (l == r) hf^`at
return; FR,#s^kF
if ((mid - l) >= THRESHOLD) sx<+ *Trl
mergeSort(data, temp, l, mid); zg Y*|{4Sl
else 0S:!Gv+
insertSort(data, l, mid - l + 1); qVD!/;l
if ((r - mid) > THRESHOLD) @VC9gdO/
mergeSort(data, temp, mid + 1, r); Qv0>Pf
else @52=3
insertSort(data, mid + 1, r - mid); /N[o[q
Ed&,[rC
for (i = l; i <= mid; i++) { Na 9l#
temp = data; $ lsRg:J
} HvgK_'
for (j = 1; j <= r - mid; j++) { zHoO?tGf
temp[r - j + 1] = data[j + mid]; {iIg 4PzrU
} #D LT-G0
int a = temp[l]; h[je_^5
int b = temp[r]; B,vHn2W
for (i = l, j = r, k = l; k <= r; k++) { JNM@Q
if (a < b) { 76_8e{zbr
data[k] = temp[i++]; fFZ`rPb
a = temp; ,gL)~6!A
} else { N 1f~K.e\
data[k] = temp[j--]; .H(}[eG_
b = temp[j]; N<Z)b!o%u
} 7{+Io
} `b#nC[b6|v
} X:SzkkVl7
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/** gc2|V6(
* @param data Y6<0%
* @param l u5XU`!
* @param i OU.9 #|qU
*/ `YmI'
private void insertSort(int[] data, int start, int len) { Q0q)n=i}]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )' x/q
} H&yFSz}6a
} \|pK Z6*s
} wO_pcNYZ8
} A.$VM#
1_j<%1{sZ
堆排序： Tu=eQS|'
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package org.rut.util.algorithm.support; uU[[[LQq
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import org.rut.util.algorithm.SortUtil; $;)noYo
k$0|^GL8
/** [Z5}2gB&
* @author treeroot \p3nd!OIG
* @since 2006-2-2 PD}SPOA`U3
* @version 1.0 +1+A3
*/ =2g[tsY
public class HeapSort implements SortUtil.Sort{ =JbdsYI(
Ic{'H2~4,
/* (non-Javadoc) B=q)}aWc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jp.3KA>
*/ ."F'5eTT~
public void sort(int[] data) { >d27[%
MaxHeap h=new MaxHeap(); _!C)r*0(
h.init(data); vA2,&%jw
for(int i=0;i h.remove(); z%}CBTm
System.arraycopy(h.queue,1,data,0,data.length); ]cLEuE^&
} ~aqT~TL_
CFkW@\]
private static class MaxHeap{ fbHWBb
]U#[\ Z
void init(int[] data){ "S B%02
this.queue=new int[data.length+1]; *fQ?A|l!x
for(int i=0;i queue[++size]=data; *2"bG1`
fixUp(size); &3 XFgHo
} ^T}}4I_Y
} N'eQ>2>O@
2sd ) w
private int size=0; s.p1L
EvSnZB1 y
private int[] queue; C>JekPeM
x tYV"
public int get() { $K6?(x_
return queue[1]; $/<"Si&(
} i)@U.-*5m
t-eKruj+
public void remove() { e_I; y
SortUtil.swap(queue,1,size--); \'s$ZN$k
fixDown(1); xJ=ZQ)&]
} )8x:x7?
file://fixdown .y %pGi
private void fixDown(int k) { M9(ez7Z
int j; {.aK{ V
while ((j = k << 1) <= size) { ^Hz
if (j < size %26amp;%26amp; queue[j] j++; ?dJ/)3I%F
if (queue[k]>queue[j]) file://不用交换 t`<}UWAH+
break; C}(<PNT
SortUtil.swap(queue,j,k); zqekkR]
k = j; ]ZR{D7.?
} P<cMP)+K
} ,<0Rf
private void fixUp(int k) { RI[7M (
while (k > 1) { V_+}^
int j = k >> 1; F.~n
if (queue[j]>queue[k]) )){PBT}t]
break; &jXca|wAR
SortUtil.swap(queue,j,k); n=<NFkeX
k = j; 54ak<&?
} LaIW,+
} + AcKB82
?o(ZTlT
} Aj8l%'h[
_"?c9
} };|!Lhl+
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SortUtil： TRs[~K)n
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package org.rut.util.algorithm; (xk.NZnF
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import org.rut.util.algorithm.support.BubbleSort; #Acon7Rp
import org.rut.util.algorithm.support.HeapSort; (TT3(|v
import org.rut.util.algorithm.support.ImprovedMergeSort; :DOr!PNA
import org.rut.util.algorithm.support.ImprovedQuickSort; o9KyAP$2
import org.rut.util.algorithm.support.InsertSort; Tm%$J
import org.rut.util.algorithm.support.MergeSort; fs2mN1
import org.rut.util.algorithm.support.QuickSort; XPHQAo[(s
import org.rut.util.algorithm.support.SelectionSort; r.^0!(d
import org.rut.util.algorithm.support.ShellSort; PtQQZ"ept
k%EWkM)?
/** 2gQY8h8
* @author treeroot Pcs^@QP
* @since 2006-2-2 8 *4@-3Sx
* @version 1.0 _-4n~(
*/ i_|9<7a
public class SortUtil { ?o2;SY(-
public final static int INSERT = 1; uI%N?
public final static int BUBBLE = 2; 4)3g!o?
public final static int SELECTION = 3; &ui:DZAxj|
public final static int SHELL = 4; ;jRL3gAe)
public final static int QUICK = 5; {c v;w
public final static int IMPROVED_QUICK = 6; 6V'wQqJ
public final static int MERGE = 7; QRsqPh&-
public final static int IMPROVED_MERGE = 8; ;Ri 3#*a=
public final static int HEAP = 9; ~v.jZ/h
VKq0<+M
public static void sort(int[] data) { $Nj'OJSj%
sort(data, IMPROVED_QUICK); 8q_1(& O
} r5f^WZ$-
private static String[] name={ +IwdMJ8&8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %iK%$
}; Pk$}%;@v
W0VA'W
private static Sort[] impl=new Sort[]{ D3<IuWeM
new InsertSort(), 4^ c!_K&&
new BubbleSort(), x1|Da$2
new SelectionSort(), ;V|M3
new ShellSort(), l%^h2 o
new QuickSort(), o `b`*Z
new ImprovedQuickSort(), 6!4';2Q
new MergeSort(), Dl0/-=L
new ImprovedMergeSort(), F{TC#J}I%'
new HeapSort() y<O@rD8iA
}; 8B}'\e4i
!a' K&
public static String toString(int algorithm){ IkSX\*
return name[algorithm-1]; e{v,x1Y_z(
} L@7Qs6G2u
pwa.q
public static void sort(int[] data, int algorithm) { Q{H17]W
impl[algorithm-1].sort(data); x7vq?fP0n
} kxwNbxC
K5P Gi#
public static interface Sort { !nec 7
public void sort(int[] data); gE\A9L~b
} %GM>u2baw
^$e0t;W=
public static void swap(int[] data, int i, int j) { VT'0DQ!NIq
int temp = data; o^6jyb!j
data = data[j]; 4uFIpS|rq
data[j] = temp; 3Z_t%J5QZ$
} $8jaapNm@
} d/l,C4p