[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; AuUT 'E@E
} w_pEup\`
int i1=l; m9ts&b+TE
int i2=mid+1; F6h3M~uR
for(int cur=l;cur<=r;cur++){ *c7kB}/
if(i1==mid+1) %]nYv#K
data[cur]=temp[i2++]; @=`Dw/13
else if(i2>r) ,0NVb7F;k
data[cur]=temp[i1++]; z*ZEw
else if(temp[i1] data[cur]=temp[i1++]; 2\l7=9 ]\3
else pl Ii
data[cur]=temp[i2++]; [VIdw92
} </tiNc
} UevbLt1Y
TYWajcch
} ^M6v;8EU
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改进后的归并排序: ?l`DkUo*j
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package org.rut.util.algorithm.support; LW?] ~|
9_JK.
import org.rut.util.algorithm.SortUtil; 'VFxg,
9=@j]g|
/** [Ua4{3#
* @author treeroot dKDtj:
* @since 2006-2-2 ['R2$z
* @version 1.0 PKT0Drv}c7
*/ >WE3$Q>bi
public class ImprovedMergeSort implements SortUtil.Sort { y/mxdPw
Bka\0+
private static final int THRESHOLD = 10; _X;^'mqf~
)`F?{Sg
/* #Bj{ 4OeV
* (non-Javadoc) N~l(ng9'U
* Smo^/K`f9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [%;LZZgl
*/ O^G/(
public void sort(int[] data) { l*uNi47|
int[] temp=new int[data.length]; 'IP'g,o++
mergeSort(data,temp,0,data.length-1); NZ9=hI;iM
} GBtBmV/`
#6fp"
private void mergeSort(int[] data, int[] temp, int l, int r) { dr^pzM!N
int i, j, k; l-_voOP
int mid = (l + r) / 2; | ctGxS9
if (l == r) "p.MJxH
return; S0/@y'q3en
if ((mid - l) >= THRESHOLD) ]kbmbO?M
mergeSort(data, temp, l, mid); rmUTl
else Hq$AF
insertSort(data, l, mid - l + 1); 5!}xl9D
if ((r - mid) > THRESHOLD) IGEf*!
mergeSort(data, temp, mid + 1, r); 8wwqV{O7
else Yfk[mo
insertSort(data, mid + 1, r - mid); af\>+7x93
;5=J'8f
for (i = l; i <= mid; i++) { "uN JQ0Y
temp = data; LT!B]y
} qWKpnofa
for (j = 1; j <= r - mid; j++) { v~q2D"
temp[r - j + 1] = data[j + mid]; {,*G}/9<
} ;nji<
int a = temp[l]; !EF~I8d\]
int b = temp[r]; go m<V?$
for (i = l, j = r, k = l; k <= r; k++) { *6e`km
if (a < b) { JTNQz
data[k] = temp[i++]; E{^*^+c"h
a = temp; x8.7])?w
} else { ~IZ'zuc
data[k] = temp[j--]; ->6/L)
b = temp[j]; zHG KPuk'
} Wd_bDZQ
} Zq2dCp%
} 24Z7;'
%Z 9<La
/** Y"D'|i
* @param data +8."z"i3lE
* @param l r|:|\"Yk
* @param i A`Z!=og=
*/ j;<Yje&Wz
private void insertSort(int[] data, int start, int len) { -2o4v#d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VxLq,$B76
} (WR&Vt4Rh
} ;i^p6b j
} T.<eriv
} M<r'j $g
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堆排序： kwMuL>5
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package org.rut.util.algorithm.support; {r`l
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import org.rut.util.algorithm.SortUtil; -dsB@nPiUw
2WIL0Siwl
/** 6b9Ddb*
* @author treeroot xYc)iH6&
* @since 2006-2-2 -6;0 x
* @version 1.0 'j !!h4
*/ sDK lbb
public class HeapSort implements SortUtil.Sort{ P_j?V"i<
[^A.$,
/* (non-Javadoc) Jn +[:s.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z_}vjk~s
*/ 7e/Uc!&*
public void sort(int[] data) { 1B+MCt4
MaxHeap h=new MaxHeap(); sVZb[|zSri
h.init(data); -\6tVF11z
for(int i=0;i h.remove(); OwwH 45
System.arraycopy(h.queue,1,data,0,data.length); \bCm]wR
} 'v* =}k
}$hxD9z
private static class MaxHeap{ W*QD'
A)2vjM9}K
void init(int[] data){ -?!|W-}@G=
this.queue=new int[data.length+1]; "L1cHP~d
for(int i=0;i queue[++size]=data; ]3 YJEP
fixUp(size); ;y%lOYm
} F_/]9tz?;
} _K)B
zawU
private int size=0; 7fLLV2
mk~i (Ee
private int[] queue; K%Mm'$fTw
>^Klq`"?g=
public int get() { a^<
return queue[1]; ({yuwH?tH
} Cmm"K[>Rx
d;Z<")
public void remove() { ilw<Q-o4(
SortUtil.swap(queue,1,size--); KM g`O3_16
fixDown(1); =%znY`0b56
} TgSU}Mf)a
file://fixdown X1]&j2WR
private void fixDown(int k) { W'E!5T^
int j; =5b5d
while ((j = k << 1) <= size) { [z]@<99/
if (j < size %26amp;%26amp; queue[j] j++; p/:)Z_
if (queue[k]>queue[j]) file://不用交换 D'YF[l
break; i6-q%%]6
SortUtil.swap(queue,j,k); "FT5]h
k = j; =
} O_nk8
} @/lLLGrZ"
private void fixUp(int k) { mn{8"@Z
while (k > 1) { f~jx2?W
int j = k >> 1; u6'vzLmM
if (queue[j]>queue[k]) @CP"AYB #
break; jC*(ZF1B
SortUtil.swap(queue,j,k); q]0a8[]3
k = j; j?jEWreq]~
} ?g}n$%*5y!
} 4};!nYey!
*#+d j"
} AU}lKq7%
9xB^dKM3
} vz)A~"E
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SortUtil： |b;}' *
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package org.rut.util.algorithm; HW|c -\tS
!aeL*`;
import org.rut.util.algorithm.support.BubbleSort; UG s <<
import org.rut.util.algorithm.support.HeapSort; UIvTC S
import org.rut.util.algorithm.support.ImprovedMergeSort; n4 KiC!*i0
import org.rut.util.algorithm.support.ImprovedQuickSort; -WB?hmx
import org.rut.util.algorithm.support.InsertSort; ~2 T_)l?
import org.rut.util.algorithm.support.MergeSort; G-G!c2o
import org.rut.util.algorithm.support.QuickSort; Z_iu^Q
import org.rut.util.algorithm.support.SelectionSort; #-'=)l}i1A
import org.rut.util.algorithm.support.ShellSort; =jkC]0qx
aj20, w
/** ?|%^'(U}
* @author treeroot /R''R:j
* @since 2006-2-2 H:`W\CP7_
* @version 1.0 W([)b[-*
*/ 0'TqW9P
public class SortUtil { +%>s\W+?]
public final static int INSERT = 1; PkLRQ}
public final static int BUBBLE = 2; &{7n
public final static int SELECTION = 3; i`gsT[JQRX
public final static int SHELL = 4; P~#!-9?
public final static int QUICK = 5; =3{h9
public final static int IMPROVED_QUICK = 6; ~4U[p 50
public final static int MERGE = 7; b)en/mz
public final static int IMPROVED_MERGE = 8; C:hfI;*7
public final static int HEAP = 9; >L$y|8O
s^^X.z ,
public static void sort(int[] data) { 5w gtc~
sort(data, IMPROVED_QUICK); +#6WORH0S
} Umm_FEU#]
private static String[] name={ %bt2^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MKJ9PcVi
}; pCb@4nb
1#^[{XlAx
private static Sort[] impl=new Sort[]{ Qf414 oW
new InsertSort(), DHbLS3-
new BubbleSort(), s+[_5n~
new SelectionSort(), k)[}3oq
new ShellSort(), en=Z[ZIPO
new QuickSort(), !Wvzum@5D
new ImprovedQuickSort(), =gGK243
new MergeSort(), (u]ft]z,-B
new ImprovedMergeSort(), HoT5 5v!o
new HeapSort() uz ` H
}; *-ZD-B*?
7\"-<z;kK
public static String toString(int algorithm){ >RHK6c
return name[algorithm-1]; e[i&2mM
} p[0Ws460
E,xCfS)
public static void sort(int[] data, int algorithm) { xii*"n~
impl[algorithm-1].sort(data); Q~,E K
} ^Xt9AM]e
!.+iA=K{
public static interface Sort { !#rZeDmw
public void sort(int[] data); Y">Q16(
} D,mFme
H$Q$3Q!`
public static void swap(int[] data, int i, int j) { X-3L4@T:?
int temp = data; R=i$*6}a
data = data[j]; "h7Z(Y
data[j] = temp; <s9Sx>Zb
} W$EX6jTGI
} K *{C:Y