[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; ~WVrtYJu
} m^TkFt<BM
int i1=l; ;$W|FpR2
int i2=mid+1; +ux,cx.U"
for(int cur=l;cur<=r;cur++){ (j2]:BVu
if(i1==mid+1) [x@iqFO9
data[cur]=temp[i2++]; 9{+B lNZ
else if(i2>r) ?f a/}|T
data[cur]=temp[i1++]; towQoqv
else if(temp[i1] data[cur]=temp[i1++]; f5'+F-`N
else #*~#t4S-
data[cur]=temp[i2++]; ^D!UF(H
} akaQ6DIdG
} aa$+(
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} r=s7be
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改进后的归并排序: |`,%%p|T%
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package org.rut.util.algorithm.support; Lw3Z^G
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import org.rut.util.algorithm.SortUtil; CA{c-kG
3xeW!~
/** 3Y>!e#
* @author treeroot ETYw
* @since 2006-2-2 d kPfdK}G
* @version 1.0 *`|F?wF
*/ XWK A0
public class ImprovedMergeSort implements SortUtil.Sort { 1,Y-_e)
n`}vcVL;
private static final int THRESHOLD = 10; kGCd!$fsk
hMi`n6m
/* ^ng?+X>mP
* (non-Javadoc) Zsaz#z|xW
* VNF@)!l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uZi]$/ic
*/ )bqO}_B
public void sort(int[] data) { y6;A4p>
int[] temp=new int[data.length]; N{f RZN
mergeSort(data,temp,0,data.length-1); z~Gi/Ln
} `NrxoU=
j:rGFd
private void mergeSort(int[] data, int[] temp, int l, int r) { $ -;,O8yR
int i, j, k; 5r@x$*>e
int mid = (l + r) / 2; "(/.3`g
if (l == r) )|3?7?X
return; mL ]zkD_
if ((mid - l) >= THRESHOLD) Fj|C+;Q.
mergeSort(data, temp, l, mid); h%pgdix
else $:SHZe
insertSort(data, l, mid - l + 1); k/cQJz
if ((r - mid) > THRESHOLD) ?PLf+S
mergeSort(data, temp, mid + 1, r); CsXIq.9
else LC/6'4}_
insertSort(data, mid + 1, r - mid); ShFSBD\M#
GJU84Xn7
for (i = l; i <= mid; i++) { _z~|*7@
temp = data; B_nim[72
} | M4_@P
for (j = 1; j <= r - mid; j++) { 9tWu>keu
temp[r - j + 1] = data[j + mid]; iq=<LOx
} L3,p8-d9Z
int a = temp[l]; Beqzw0
int b = temp[r]; Z_Hc":4i
for (i = l, j = r, k = l; k <= r; k++) { YrFB~z.V
if (a < b) { F:1w%#6av
data[k] = temp[i++]; Js ~_8
a = temp; qf7lQovK
} else { o{lR_
data[k] = temp[j--]; g7rn|<6FI
b = temp[j]; DhYQ>Gv8U
} `VwZDU~6
} i_Ab0vye
} w>J|416
GeD^-.^
/** b+9M? k"
* @param data I4,C-D
* @param l L slI!.(
* @param i :[?hU}9
*/ a)/!ifJ;
private void insertSort(int[] data, int start, int len) { ??Q'| r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cj#$WZga%
} |9Q4VY'";
} K1Snag
} Tq,Kel
} }w}2'P'T
buu~#m1z
堆排序： 0[/>> !ws
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package org.rut.util.algorithm.support; Q30AaG}f
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import org.rut.util.algorithm.SortUtil; "AMbU68
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/** ?A+-k4l
* @author treeroot yY_Zq\
* @since 2006-2-2 p"\Z@c
* @version 1.0 bz<f u
*/ <F{EZ Ii
public class HeapSort implements SortUtil.Sort{ @(<C{
Q}C)az
/* (non-Javadoc) :c)N"EJlI2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fuq ;4UcbL
*/ V(3^ev/
public void sort(int[] data) { >Z r f}H
MaxHeap h=new MaxHeap(); e:D8.h+&}
h.init(data); *")Req
for(int i=0;i h.remove(); [|.IXdJ!
System.arraycopy(h.queue,1,data,0,data.length); =bgzl=A`
} _FR_6*C)5
6}4?,r
private static class MaxHeap{ ?5-Y'(r
K%iWUl;
void init(int[] data){ B|XrjI?
this.queue=new int[data.length+1]; lLhvpvT
for(int i=0;i queue[++size]=data; ;+jz=9Q-
fixUp(size); jMr[UZ
} |C"(K-do
} =z#6mSx|W
i[_B~/_
private int size=0; '-c *S]:r
[@ >}
private int[] queue; |7ct2o~un
xU<WUfS1
public int get() { .Nt;J,U
return queue[1]; DXA<m2&64N
} D y+)s-8
n<q1itjD
public void remove() { d^h`gu~3
SortUtil.swap(queue,1,size--); y``[CBj
fixDown(1); f3PDLQA
} Bl[4[N
file://fixdown /5M0[C E
private void fixDown(int k) { %]G'u
int j; 7W[+e&
while ((j = k << 1) <= size) { )<YfLDgTs
if (j < size %26amp;%26amp; queue[j] j++; 6.5E d-
if (queue[k]>queue[j]) file://不用交换 [QUaC3l)
break; r)<c ~\0 7
SortUtil.swap(queue,j,k); gOb"-;Zw
k = j; M]|tXo$?
} t^Z-0jH
} kA/4W^]Ws
private void fixUp(int k) { pNUe|b+P
while (k > 1) { b:B+x6M
int j = k >> 1; 4,EX2
if (queue[j]>queue[k]) ^Mvgm3hg
break; Ln+;HorZ]
SortUtil.swap(queue,j,k); O1+OE!w
k = j; "{9^SPsp
} +%Z#!1u
} uvG'Kx
OTe h8h
} (fNG51h!
qkXnpv
} l(A)Gd5>
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SortUtil： 2o)8'Lp
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package org.rut.util.algorithm; fM/~k>wl
L0\~K~q
import org.rut.util.algorithm.support.BubbleSort; Hnft1
import org.rut.util.algorithm.support.HeapSort; VEsIhjQ
import org.rut.util.algorithm.support.ImprovedMergeSort; 6+UTEw;
import org.rut.util.algorithm.support.ImprovedQuickSort; ^=Dz)95c
import org.rut.util.algorithm.support.InsertSort; LO;7NK
import org.rut.util.algorithm.support.MergeSort; m+|yk.md
import org.rut.util.algorithm.support.QuickSort; k%D|17I
import org.rut.util.algorithm.support.SelectionSort; gUr#3#
import org.rut.util.algorithm.support.ShellSort; h;[<4zw
,tTq25~H\
/** Efp[K}Z^$
* @author treeroot q!;u4J
* @since 2006-2-2 )&6ZgRq
* @version 1.0 o'EJ,8
*/ *q&^tn b
public class SortUtil { ;{lb_du2:
public final static int INSERT = 1; E]O/'-
public final static int BUBBLE = 2; t7-6A
public final static int SELECTION = 3; lxsn(- j
public final static int SHELL = 4; O\J{4EB@.
public final static int QUICK = 5; J5!-<oJ/
public final static int IMPROVED_QUICK = 6; y g:&cIr,
public final static int MERGE = 7; #_SsSD=.Sy
public final static int IMPROVED_MERGE = 8; -xXdT$Xd
public final static int HEAP = 9; G)IK5zCDd
V1#:[o63+
public static void sort(int[] data) { v?Zo5uVoq
sort(data, IMPROVED_QUICK); DuQW?9^232
} {h*)|J
private static String[] name={ -{XDQ{z<%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZS<`.L6B3
}; nV:RL|p2jw
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private static Sort[] impl=new Sort[]{ w2H^q3*
new InsertSort(), "IHFme@^
new BubbleSort(), H-,p.$3}
new SelectionSort(), D_q"|D$SB
new ShellSort(), }Y"vUl_I2
new QuickSort(), G\z5Ue*
new ImprovedQuickSort(), 8kLHQ0pmu
new MergeSort(), QXu[<V
new ImprovedMergeSort(), !$NQF/Ol
new HeapSort() WJJmM*>JW
}; 0Ke2%+yqJ
~KQiNkA\|l
public static String toString(int algorithm){ _v[gJ(F
return name[algorithm-1]; <2af&-EGs
} 7NvnCs
3a?|}zr4
public static void sort(int[] data, int algorithm) { od)ssL&E~
impl[algorithm-1].sort(data); []jbzVwS2
} F'-,Ksn
qizQt]l
public static interface Sort { Mt4*`CxtH;
public void sort(int[] data); k:F{U^!p|
} [sNvCE$\]
@#=yC.s
public static void swap(int[] data, int i, int j) { NTo[di\_
int temp = data; <A(Bq'eQM
data = data[j]; !k Heslvi
data[j] = temp; R`J.vMT
} 2w}l!'ue
} GG`j9"t4