[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; gt{ei)2b
} @: %}clZ
int i1=l; tEBf2|<
int i2=mid+1; +>c)5Jih
for(int cur=l;cur<=r;cur++){ !=k\Rr@qx
if(i1==mid+1) cs~ }k7><
data[cur]=temp[i2++]; qXP)R/~OZ
else if(i2>r) &k : |
data[cur]=temp[i1++]; Xo{Ce%L
else if(temp[i1] data[cur]=temp[i1++]; q'q'v S
else *A c~
data[cur]=temp[i2++]; CF =#?+x
} *!lq1h
} <NT/+>:2
_xUiHX<
} J"FKd3~:E
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改进后的归并排序: Oh<Z0M)
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package org.rut.util.algorithm.support; _qJ[~'m<^C
^'v6 ,*:4
import org.rut.util.algorithm.SortUtil; YgdoQBQ
,|xG2G6
/** URJ"
* @author treeroot NjsP"
* @since 2006-2-2 ^vsOlA(4
* @version 1.0 P,D >gxl
*/ *w> /vu
public class ImprovedMergeSort implements SortUtil.Sort { 5\EHu8
'HW(RC0dR
private static final int THRESHOLD = 10; e`#Gq0}8
nV"[WngN
/* w&:h^u
* (non-Javadoc) >\(Ma3S
* ,7/un8:%c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jwAO{.}T1r
*/ pB?a5jpA
public void sort(int[] data) { OkA-=M)RI:
int[] temp=new int[data.length]; +zz9u?2C`
mergeSort(data,temp,0,data.length-1); >JCSOI
} OdwSNG
)bw>)&)b`
private void mergeSort(int[] data, int[] temp, int l, int r) { I%{^i d@
int i, j, k; YfF&: "-NU
int mid = (l + r) / 2; Pgye{{
if (l == r) ;@v7AF6Hq
return; *M-.Vor?R
if ((mid - l) >= THRESHOLD) ]p+t>'s
mergeSort(data, temp, l, mid); W+Gu\=s%O
else G9Azd^3
insertSort(data, l, mid - l + 1); SuGlNp>#qm
if ((r - mid) > THRESHOLD) ^Fb"Is#S,
mergeSort(data, temp, mid + 1, r); cr,o<
else E3NYUHfZ
insertSort(data, mid + 1, r - mid); K<Ct
[h8F)
for (i = l; i <= mid; i++) { vlzjALy
temp = data; De:w(Rm
} pMa 3R3a
for (j = 1; j <= r - mid; j++) { glk I9~
temp[r - j + 1] = data[j + mid]; \mWXr*;
} S)JZb_
int a = temp[l]; jcx/ZR
int b = temp[r]; !jYV,:'
for (i = l, j = r, k = l; k <= r; k++) { <uv{/L b
if (a < b) { \UtUP#Y{t
data[k] = temp[i++]; w8FZXL
a = temp; _%i|*
} else { ] ^
data[k] = temp[j--]; D8[&}D4
b = temp[j]; ?ADk`ts~,}
} 1T}|c;fc
} `Rj i=k>
} Qyd3e O_
4_r8ynq{z
/** f()^^+
* @param data vbwEX6
* @param l hw~cS7
* @param i BIV]4vl-&
*/ K7e<hdP_#
private void insertSort(int[] data, int start, int len) { %qja:'k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jGt'S{
} n!HFHy2
} vc^PXjX
} &[RC4^;\V
} fjp>FVv3
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堆排序： )#*c|.
.=^h@C*
package org.rut.util.algorithm.support; "lN<v=
:VLuI
import org.rut.util.algorithm.SortUtil; rD$7;
^D vaT9s
/** E8NIH!dI
* @author treeroot G*J(4~Yw}
* @since 2006-2-2 QW6k!ms$
* @version 1.0 |S>nfL{TQe
*/ 3t%uUkXl
public class HeapSort implements SortUtil.Sort{ o2Pj|u*X
*jA%.F
/* (non-Javadoc) Hyee#fB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1egryp
*/ -P'>~W,~
public void sort(int[] data) { \dufKeiS&a
MaxHeap h=new MaxHeap(); <;U"D.'
h.init(data); =797;|B H
for(int i=0;i h.remove(); $T3/*xN
System.arraycopy(h.queue,1,data,0,data.length); 5-]%D(y
} *+@/:$|U
7*[>e7:A
private static class MaxHeap{ 6e~+@S
j&8~X2?*
void init(int[] data){ B8a!"AQ~5
this.queue=new int[data.length+1]; 2M1yw "
for(int i=0;i queue[++size]=data; !L3Bvb;Q
fixUp(size); ~{d94o.
} \19XDqf8
} 6[qRb+ds
N?87Bd
private int size=0; df8rf8B-
G]&:">&R
private int[] queue; VK`b'U&l"
sBSBDjk[
public int get() { =1+I<Ljk
return queue[1]; !7bC\ {
} dm,bZHo
qRB%G<H
public void remove() { w_|WberU
SortUtil.swap(queue,1,size--); iZ_R oJ
fixDown(1); V?Nl%M[b
} @d4zSG/s5w
file://fixdown ao7|8[
private void fixDown(int k) { 162qxR[.
int j; m41n5T`
while ((j = k << 1) <= size) { ""WZpaw
if (j < size %26amp;%26amp; queue[j] j++; p=405~
if (queue[k]>queue[j]) file://不用交换 WtlIrdc
break; C<n.C*o
SortUtil.swap(queue,j,k); Ho"FB|e
k = j; IOmIkx&`GP
} Q g"{F},4
} s0nihX1Z-
private void fixUp(int k) { ?TzN?\
while (k > 1) { wy Le3
int j = k >> 1; 6xBP72L;%"
if (queue[j]>queue[k]) &ul9N)A
break; +d'h20
SortUtil.swap(queue,j,k); EB> RY+\
k = j; MuO>O97
} q2/Vt0aYx
} SULWPH5Pr
]pB~&0jg
} *><] [|Y@H
PK+][.6H
} 9:=a FP
y>~KeUC
SortUtil： /6S/a*`<X
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package org.rut.util.algorithm; ?94da4p
9Z+@i:_}
import org.rut.util.algorithm.support.BubbleSort; m9PcDhv
import org.rut.util.algorithm.support.HeapSort; Js=|r;'
import org.rut.util.algorithm.support.ImprovedMergeSort; ;G},xDGO_m
import org.rut.util.algorithm.support.ImprovedQuickSort; p.l]%\QI
import org.rut.util.algorithm.support.InsertSort; !J:DBtGT
import org.rut.util.algorithm.support.MergeSort; OEAF.
import org.rut.util.algorithm.support.QuickSort; ]j{S' cz
import org.rut.util.algorithm.support.SelectionSort; (bBetX
import org.rut.util.algorithm.support.ShellSort; Y<0f1N
9r8{9h:
/** }xdI{E1 q)
* @author treeroot t*D[Q$v
* @since 2006-2-2 O-&n5
* @version 1.0 slPFDBx
*/ Qy3e,9nS
public class SortUtil { q2hZ1o
public final static int INSERT = 1; x b_C1n
public final static int BUBBLE = 2; 4&$G;?#W2
public final static int SELECTION = 3; b1 KiO2 E
public final static int SHELL = 4; >?$Ze@
public final static int QUICK = 5; @u$oqjK
public final static int IMPROVED_QUICK = 6; PD/~@OsxU
public final static int MERGE = 7; I&(cdKY z
public final static int IMPROVED_MERGE = 8; _nTjCN625
public final static int HEAP = 9; H%sQVE7m
^lQ-w|7(
public static void sort(int[] data) { 'bT9AV%
sort(data, IMPROVED_QUICK); *y0`P0V|8
} 8a05`ZdP
private static String[] name={ \<PX'mnO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4ErDGYg}
}; }e@j(*8
M(2[X/t
private static Sort[] impl=new Sort[]{ h+Z|s
new InsertSort(), \|T0@V
new BubbleSort(), Xbu >8d?n
new SelectionSort(), tHu8|JrH+
new ShellSort(), &[s^`e
new QuickSort(), >?tcL*
new ImprovedQuickSort(), 6%yr>BFtVV
new MergeSort(), ]XP[tLYY
new ImprovedMergeSort(), vG
new HeapSort() =)bZSb"<"
}; z_Qw's
|H@M-
public static String toString(int algorithm){ "1[N;|xa
return name[algorithm-1]; ga,yFw
} +HfjnEbtBs
aG"UV\
public static void sort(int[] data, int algorithm) { m|-O/6~
impl[algorithm-1].sort(data); %ZQl.''ISa
} 6dinC <[}
E?FPxs
public static interface Sort { F-=er e
public void sort(int[] data); -|3U0:'m
} ^iI^)
5-C6;7%:
public static void swap(int[] data, int i, int j) { x/4lD}Pw]
int temp = data; %d?%^) u,
data = data[j]; {?j|]j
data[j] = temp; F\]rxl4(L
} qrdA?VV
} o?%x!m>