[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; @s!9T
} Kn3qq
int i1=l; =!7k/n';
int i2=mid+1; 0STtwfTr:
for(int cur=l;cur<=r;cur++){ PmOm>
if(i1==mid+1) la#f,C3_
data[cur]=temp[i2++]; }M?\BH&
else if(i2>r) Gxu
data[cur]=temp[i1++]; 2|]$hjs
else if(temp[i1] data[cur]=temp[i1++]; Qr]xj7\@i
else Q4e*Z9YJ
data[cur]=temp[i2++]; f`'?2
} K=Z~$)Og)
} ULc oti=,
^$qr6+
} z-fP#.
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改进后的归并排序: ]-"~?
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package org.rut.util.algorithm.support; $z,lq#zzl
j<H`<S
import org.rut.util.algorithm.SortUtil; lx*"Pj9hho
~_ss[\N
/** USfpCRj9
* @author treeroot @igGfYy
* @since 2006-2-2 YT\x'`>Q
* @version 1.0 pQ%~u3
*/ }~pT saw
public class ImprovedMergeSort implements SortUtil.Sort { xc)A`(g
*izPLM}+
private static final int THRESHOLD = 10; *sK")Q4N
kKr|PFz
/* I>ks H
* (non-Javadoc) 1}+lL)-!
* _j{^I^P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i zJa`K
*/ mh`~1aEr
public void sort(int[] data) { Eukj2a
int[] temp=new int[data.length]; )RA$E`!b
mergeSort(data,temp,0,data.length-1); QX}O{LQR
} v0euvs
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private void mergeSort(int[] data, int[] temp, int l, int r) { p12'^i |
int i, j, k; `Wq4k>J}*
int mid = (l + r) / 2; 2g shiY8_
if (l == r) =4`#OQ&g
return; S*;8z}5<\
if ((mid - l) >= THRESHOLD) I^|6gaP|6
mergeSort(data, temp, l, mid); fp!Ba
else ozN#LIM>P
insertSort(data, l, mid - l + 1); j3{8]D
if ((r - mid) > THRESHOLD) cU <T;1VQ
mergeSort(data, temp, mid + 1, r); YEfa8'7R
else w@&g9e6E
insertSort(data, mid + 1, r - mid); ph\KTLU
0>hV?A
for (i = l; i <= mid; i++) { F FHk0!3
temp = data; dL;C4[(N
} %oVoE2T{@
for (j = 1; j <= r - mid; j++) { Wr+?ul*_
temp[r - j + 1] = data[j + mid]; } LuPYCzpu
} <=WSX{_D
int a = temp[l]; 1F?`.~q
int b = temp[r]; L=Cm0q 3v
for (i = l, j = r, k = l; k <= r; k++) { A0{ !m
if (a < b) { y4* }E
data[k] = temp[i++]; 3LXS}~&
a = temp; *s4h tt
} else { 57r?`'#*
data[k] = temp[j--]; bxX[$q
b = temp[j]; A[20ic
} mqL&bmT
} iW.4'9
} On%21L;JG
Hc.r/
/** pzcV[E1
* @param data L ;5R*)t
* @param l pw;
* @param i "fWAp*nI3t
*/ `I*W}5
private void insertSort(int[] data, int start, int len) { /)I:Cz/f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CZ2&9Vb9I
} &h)G>Sqc
} /H 3u^
} |eS5~0<`
} p H&Tb4
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堆排序： TAfLC)
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package org.rut.util.algorithm.support; ^Mw>'*5^
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import org.rut.util.algorithm.SortUtil; xWkCP2$?P
>E*j4gg
/** JkT, i_
* @author treeroot VQSwRL3B=
* @since 2006-2-2 [I/f(GK
* @version 1.0 4`Com~`6"
*/ MExP'9
public class HeapSort implements SortUtil.Sort{ +E.}k!y
i4 BCm/h
/* (non-Javadoc) T\;7'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .iK{=L/(y
*/ QLNQE6-
public void sort(int[] data) { Pl|e?Np
MaxHeap h=new MaxHeap(); -$Y@]uf^
h.init(data); 8yr_A[S8.
for(int i=0;i h.remove(); ;3ZHm*xJx
System.arraycopy(h.queue,1,data,0,data.length); Y{c_5YYf
} zY?GO"U"
W)WL1@!Z
private static class MaxHeap{ E]zTd$v6
>uMj}<g#Z?
void init(int[] data){ n_G< /8
this.queue=new int[data.length+1]; FPM@%U
for(int i=0;i queue[++size]=data; _`6fGu& W
fixUp(size); C.SGm
} __x2xtrH
} q,b6).
dWR0tS6vR`
private int size=0; ;dXQB>Za
r{DR$jD
private int[] queue; 8m? 9?OV5
eK_Q>;k5A
public int get() { |e+8Xz1>
return queue[1]; S`,(10Y
} \ ;.W;!*
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public void remove() { z#qlu=
SortUtil.swap(queue,1,size--); \i Ylh HD
fixDown(1); M%dJqwH5{
} s>}ScJZK
file://fixdown oU }eAZj{
private void fixDown(int k) { #qL?;Zh0S
int j; /I[?TsXp
while ((j = k << 1) <= size) { g\sW2qXEw
if (j < size %26amp;%26amp; queue[j] j++; |&JCf=
if (queue[k]>queue[j]) file://不用交换 88fH!6b
break; Az+}[t
SortUtil.swap(queue,j,k); INca
k = j; ;6op|O
} &\(p<TF
} W/*2I3a
private void fixUp(int k) { ,TrrqCw>
while (k > 1) { dP8b\H
int j = k >> 1; $umh&z/
if (queue[j]>queue[k]) WfbG }%&J
break; Y02 cX@K6
SortUtil.swap(queue,j,k); SKTf=rY
k = j; <~:Lp:6 J
} F Qtlo+3
} D&5>Op4U
1mT3$Z
} ?L=@Zs
d\FBY&C7b
} F:"CaDk
YE<_a;yh1
SortUtil： V!!E)I
J}?F4
package org.rut.util.algorithm; *P4G}9B|9:
c_#\'yeW
import org.rut.util.algorithm.support.BubbleSort; I!IWmU6FN
import org.rut.util.algorithm.support.HeapSort; 0cV=>|b>;
import org.rut.util.algorithm.support.ImprovedMergeSort; gg;&a(
import org.rut.util.algorithm.support.ImprovedQuickSort; Rs@2Pe$3
import org.rut.util.algorithm.support.InsertSort; J7q]|9Hus|
import org.rut.util.algorithm.support.MergeSort; u&)+~X
import org.rut.util.algorithm.support.QuickSort; "#uXpCuw
import org.rut.util.algorithm.support.SelectionSort; IipG?v0z~
import org.rut.util.algorithm.support.ShellSort; #]nH$Kq
sFNBrL
/** }Dk*Hs^E
* @author treeroot H8[L:VeNT
* @since 2006-2-2 Fb#_(I[aj
* @version 1.0 wLeP;u1
*/ 8l(_{Y5(-
public class SortUtil { fVCpG~&t
public final static int INSERT = 1; g_z%L?N
public final static int BUBBLE = 2; mjdZ^
public final static int SELECTION = 3; s&vREx(
public final static int SHELL = 4; Zy0u@``
public final static int QUICK = 5; ]Bo !v*12
public final static int IMPROVED_QUICK = 6; wOH$S=Ba5,
public final static int MERGE = 7; /A3tY"Vn
public final static int IMPROVED_MERGE = 8; yp%7zrU
public final static int HEAP = 9; lp`raNNo
3ZNm,{
public static void sort(int[] data) { aa!o::;
sort(data, IMPROVED_QUICK); ?`PG`|2~
} CBC0X}_`
private static String[] name={ r|rOIAo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YEGRM$'`
}; 9I0}:J;7
=,B44:`r
private static Sort[] impl=new Sort[]{ gC-3ghmgS
new InsertSort(), 6onFf* m!x
new BubbleSort(), b/N+X}VMN
new SelectionSort(), s53Pw>f
new ShellSort(), h WvQh
new QuickSort(), `usX(snY
new ImprovedQuickSort(), 1#H=<iJ
new MergeSort(), X) lzBM
new ImprovedMergeSort(), :BLD&mb"Y
new HeapSort() hS)X`M
}; >5Vv6_CI0?
H+&c=~D\_
public static String toString(int algorithm){ {(r`&[
return name[algorithm-1]; I f9t^T#
} __Kn 1H{
|/,XdTSy
public static void sort(int[] data, int algorithm) { e 5hq>K
impl[algorithm-1].sort(data); N%Gb
} :f?};t+
m Cvgs
public static interface Sort { @ToY,@]e
public void sort(int[] data); /]~Oa#SQ:
} 0zD[mt
RY=B>398:
public static void swap(int[] data, int i, int j) { G]Fp},
int temp = data; qx3@]9
data = data[j]; $[5S M>e]
data[j] = temp; &)?ECj0`
} -ea":}/
} ~>:uMXyV2t