[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; Yu=^`I
} 03PVbDq-
int i1=l; yLP0w^Q
int i2=mid+1; "M tQj}
for(int cur=l;cur<=r;cur++){ gE&f}M-
if(i1==mid+1) `}bUf epMJ
data[cur]=temp[i2++]; c/u;v69r
else if(i2>r) f W )
data[cur]=temp[i1++]; iX28+weH
else if(temp[i1] data[cur]=temp[i1++]; C+Z"0\{o
else q%"nk
data[cur]=temp[i2++]; m`|Z1CT
} U7W ct %
} +2?[=g4;}
7]Egu D4
} =cQwR:):
v7-'H/d.
改进后的归并排序: d3\8BKp
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package org.rut.util.algorithm.support; "~ /3
-}(W=r\
import org.rut.util.algorithm.SortUtil; Um~jp:6p
5^xt/vYa)
/** Wi[Y@
* @author treeroot xqr`T0!&
* @since 2006-2-2 h,\^Sb5AP
* @version 1.0 t&ztY] qh
*/ 6Bo~7gnc
public class ImprovedMergeSort implements SortUtil.Sort { ]9]3=;b>
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private static final int THRESHOLD = 10; J<H$B +;qR
9 %,_G.
/* I`5F&8J{
* (non-Javadoc) L>).o%(R
* mRW(]OFIai
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4O[5,
*/ FJ!N)`[
public void sort(int[] data) { /ZvNgaH5M
int[] temp=new int[data.length]; oB&s2~
mergeSort(data,temp,0,data.length-1); b,#cc>76\
} \I/l6H>o3
a^)7&|$ E
private void mergeSort(int[] data, int[] temp, int l, int r) { \@*cj8e
int i, j, k; jQ4Pv`
int mid = (l + r) / 2; $*MjNj2
if (l == r) o//N"S.)
return; *O$kF.3q
if ((mid - l) >= THRESHOLD) h%E25in
mergeSort(data, temp, l, mid); ~5:]Oux
else h7~&rWb
insertSort(data, l, mid - l + 1); ,Uc\ Ajx
if ((r - mid) > THRESHOLD) cJ&l86/l1
mergeSort(data, temp, mid + 1, r); $kZ,uvKN
else r&o%n5B
insertSort(data, mid + 1, r - mid); ?Xlmt$Jp
:>Z0Kb}7
for (i = l; i <= mid; i++) { shYcfLJ
temp = data; Q'7o_[o/
} 6!+xf
for (j = 1; j <= r - mid; j++) { SXwgn >
temp[r - j + 1] = data[j + mid]; TJ?}5h5
} 1[} =,uaM
int a = temp[l]; DS=kSkW^&5
int b = temp[r]; Mff_j0D
for (i = l, j = r, k = l; k <= r; k++) { A}t.`FLP,j
if (a < b) { wZE[we^Q"
data[k] = temp[i++]; !D7\$ g6g
a = temp; qVZ=:D{
} else { O<L/m[]
data[k] = temp[j--]; '+f!(teLz
b = temp[j]; t=xO12Z
} uvc0"g1h
} ^}U{O A
} <!5N=-
jcXb@FE6
/** &|n*&@fF
* @param data E36<Wog
* @param l vkc(-n
* @param i X H{5E4P
*/ yoGE#+|7^
private void insertSort(int[] data, int start, int len) { V=3NIw18
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T_5 E
} o1GWcxu*\
} rH8?GR0<
} ir \d8.
} 0EPF; Xx
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堆排序： V [[B~Rs
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package org.rut.util.algorithm.support; }gag?yQ.^
OWtN=Gk
import org.rut.util.algorithm.SortUtil; r>$jMo.S"
TD!QqLW
/** d<`Z{"g NS
* @author treeroot dkG-Yz~
* @since 2006-2-2 nzhQ\'TC
* @version 1.0 YHvmo@
*/ B quyPG"
public class HeapSort implements SortUtil.Sort{ X+P3a/T
e)cmZ8~S
/* (non-Javadoc) 90K&s#+13
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EBK\.[
*/ uz'beE
public void sort(int[] data) { hw~cS7
MaxHeap h=new MaxHeap(); r=&PUT+vt
h.init(data); jGt'S{
for(int i=0;i h.remove(); vc^PXjX
System.arraycopy(h.queue,1,data,0,data.length); F<IqKgGzH
} m{+lG*
A=h`Z^8\B
private static class MaxHeap{ .fD k5uo
3P-#NL
void init(int[] data){ O]{H2&k@
this.queue=new int[data.length+1]; BKvF,f/g
for(int i=0;i queue[++size]=data; s/ZOA[Yux
fixUp(size); OtQKDpJq
} -P'>~W,~
} q &jW{
6{+~B2Ef
private int size=0; ;?n*w+6<
Z|wZyt$$
private int[] queue; WWE?U-o
3_Oq4/
public int get() { \DGm[/P
return queue[1]; !L3Bvb;Q
} o_\b{<^I
Zjo9c{\
public void remove() { >u4uV8S
SortUtil.swap(queue,1,size--); = b)q.2'#
fixDown(1); ={feN L
} 8,kbGlSD
file://fixdown OQ[>s(`*{
private void fixDown(int k) { %Yd}},X_E
int j; k?xtZ,n{s
while ((j = k << 1) <= size) { 8q tNK>D
if (j < size %26amp;%26amp; queue[j] j++; *=;=VUu5
if (queue[k]>queue[j]) file://不用交换 Pv/P<i^
break; jq =-Y
SortUtil.swap(queue,j,k); 4>5%SzZT\3
k = j; K5w22L^=+
} H56e#:[$
} )n0g6
private void fixUp(int k) { d[SC1J
while (k > 1) { GXHk{G@TS
int j = k >> 1; YHKm{A ]
if (queue[j]>queue[k]) ^k-H$]
break; C %EQ9Iq6r
SortUtil.swap(queue,j,k); W}.4$f>
k = j; =#+Z KD
} =,0E3:X^
} Ap97Zcw
m?M(79u[
} 5T8!5EcS*
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} Tzk8y7$[
}]n&"=Zk-
SortUtil： \8t g7Sdq
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package org.rut.util.algorithm; iK.MC%8?
kYR&t}jlCg
import org.rut.util.algorithm.support.BubbleSort; [C d2L&9
import org.rut.util.algorithm.support.HeapSort; }RoM N$r
import org.rut.util.algorithm.support.ImprovedMergeSort; !w/~dy
import org.rut.util.algorithm.support.ImprovedQuickSort; Gwvs~jN
import org.rut.util.algorithm.support.InsertSort; $[|8bE
import org.rut.util.algorithm.support.MergeSort; B2,! 0Re
import org.rut.util.algorithm.support.QuickSort; vb70~k
import org.rut.util.algorithm.support.SelectionSort; ;yUY|o
import org.rut.util.algorithm.support.ShellSort; NGxii$F
{+r?gJ
/** -l,ib=ne
* @author treeroot s!+?)bB
* @since 2006-2-2 zBoU;d%p>
* @version 1.0 9(@bjL465
*/ F1,pAtA
public class SortUtil { E|5gKp-wJ
public final static int INSERT = 1; r":<1+07
public final static int BUBBLE = 2; Nf;vUYP
public final static int SELECTION = 3; %ZQl.''ISa
public final static int SHELL = 4; E?FPxs
public final static int QUICK = 5; x[>A'.m@)
public final static int IMPROVED_QUICK = 6; 5-C6;7%:
public final static int MERGE = 7; %d?%^) u,
public final static int IMPROVED_MERGE = 8; w1GCjD*y
public final static int HEAP = 9; Y&&Y:+ V
t^7R6y
public static void sort(int[] data) { YqDw*S{
sort(data, IMPROVED_QUICK); Dgkt-:S/T|
} _QErQ^`
private static String[] name={ %`}Qkb/Lyh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !W3Le$aL
}; fqr}tvMr=T
tRXM8't
private static Sort[] impl=new Sort[]{ wo_FM `@
new InsertSort(), o%|1D'f^
new BubbleSort(), w6cPd'
new SelectionSort(), X0U6:
new ShellSort(), f/=0
new QuickSort(), t7~mW$}O
new ImprovedQuickSort(), AG9U2x
new MergeSort(), xQD#; 7
new ImprovedMergeSort(), N7M^
new HeapSort() Dnp^yqz*
}; R4v=i)A~Z
fe Q%L
public static String toString(int algorithm){ r`&ofk1K
return name[algorithm-1]; i 9b^\&&
} -\I0*L'$|\
C )PN
public static void sort(int[] data, int algorithm) { kPxEGuL'
impl[algorithm-1].sort(data); .CYq+^
} F(w>lWs;
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public static interface Sort { F0|T%!FB>%
public void sort(int[] data); k\%{1oRA
} NKMB,b
w?/,LV
public static void swap(int[] data, int i, int j) { o2.! G
int temp = data; s9'iHe
data = data[j]; wj?fr?
data[j] = temp; /!E /9[V
} S\f^y8*<
} &{ f5F7E@