[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; "3LOL/7f
} kdmannM
int i1=l; v2G_p|+O
int i2=mid+1; Pon 2!$
for(int cur=l;cur<=r;cur++){ 9}iEEI
if(i1==mid+1) mm'n#%\G
data[cur]=temp[i2++]; bv5,Yk
else if(i2>r) ;hJTJMA6/6
data[cur]=temp[i1++]; )}hp[*C
else if(temp[i1] data[cur]=temp[i1++]; 1Z6<W~,1OM
else "'p:M,:
data[cur]=temp[i2++]; nV,qC.z
} |8c3%jve
} wo$9$~(
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} 4K[E3aA
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改进后的归并排序: Cy4@\X%W
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package org.rut.util.algorithm.support; O9oYuC:q
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import org.rut.util.algorithm.SortUtil; ;RB]awE
(Ybc~M)z
/** 3_~V(a
* @author treeroot Ovv~ymj
* @since 2006-2-2 ZK1d3
* @version 1.0 r@f8-!{s2h
*/ >y"W(
public class ImprovedMergeSort implements SortUtil.Sort { Jm0P~E[n
9TBkVbqV
private static final int THRESHOLD = 10; RZ:Yu
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/* WW\u}z.QJ
* (non-Javadoc) =LDzZ:' X
* g2JNa?z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [U]U *x
*/ \Pi\c~)Pr
public void sort(int[] data) { /qed_w.p
int[] temp=new int[data.length]; 57*z0<
mergeSort(data,temp,0,data.length-1); #Gx%PQ`
} wUW^ O
7/a[;`i*!
private void mergeSort(int[] data, int[] temp, int l, int r) { d }=fJ
int i, j, k; *%7[{Loz
int mid = (l + r) / 2; gPh;
if (l == r) "}!|V)K
return; ci0)kxUBF
if ((mid - l) >= THRESHOLD) >N62t9Ll[
mergeSort(data, temp, l, mid); ST5L O#5
else Q&@Ls?pu
insertSort(data, l, mid - l + 1); J:Ea|tXK^
if ((r - mid) > THRESHOLD) ?OW 4J0B'
mergeSort(data, temp, mid + 1, r); N9tH0
else #3>o^cN~8k
insertSort(data, mid + 1, r - mid); NQz*P.q
7n9&@D3:P
for (i = l; i <= mid; i++) { dIg/g~ t"
temp = data; d00#;R
} uf]SPG#/D
for (j = 1; j <= r - mid; j++) { <k!M+}a 9V
temp[r - j + 1] = data[j + mid]; njtz,qt_;G
} "XlNKBgM
int a = temp[l]; 6=U81
int b = temp[r]; DDQ}&`s
for (i = l, j = r, k = l; k <= r; k++) { JFH3)Q
if (a < b) { |tIr?nXSW3
data[k] = temp[i++]; ug{@rt/"Z
a = temp; [Gop-Vi/~
} else { 0uV3J
data[k] = temp[j--]; -0r0M)
b = temp[j]; v/*}M&vo
} ADK)p?
} ^\ A[^' 9
} 4&X D
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/** @&?E3?5ll
* @param data `|coA2$rw
* @param l u^|c_5J(
* @param i $9+|_[ ]v.
*/ h?R{5?RxK
private void insertSort(int[] data, int start, int len) { J!Er%QUR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :dq.@:+<R
} 94VtGg=b}
} J{;XNf =
} KBE3q)
} Wip@MGtJ
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堆排序： Rd'P\
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package org.rut.util.algorithm.support; DmU,}]#:
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import org.rut.util.algorithm.SortUtil; 7irpD7P>
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/** H3-(.l[!b)
* @author treeroot ^Ej$o@PH
* @since 2006-2-2 jq%%|J.x
* @version 1.0 '&hz*yk
*/ <G|i!Pm
public class HeapSort implements SortUtil.Sort{ j5m KJC
!q\MXS($#u
/* (non-Javadoc) ]QKo>7%[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p3r("\Za,
*/ GsIVx!
public void sort(int[] data) { 6_|iXs(&
MaxHeap h=new MaxHeap(); R !g'zS'
h.init(data); `#HtVI
for(int i=0;i h.remove(); +t*V7nW
System.arraycopy(h.queue,1,data,0,data.length); j9gn7LS
} i(T[
mi[t1cN)=
private static class MaxHeap{ OT0%p)
)5T82=[h<
void init(int[] data){ wcH,!;3z+
this.queue=new int[data.length+1]; }uZ/^_U.
for(int i=0;i queue[++size]=data; @$}Ct
fixUp(size); 4>^LEp
} `%QXaKO-
} (#kKL??W
Hjhgu=
private int size=0; &~mJ ).*
'8J!(+
private int[] queue; H9;0$Y(e-
;~D$rT
public int get() { yFoPCA86y
return queue[1]; $%BI8_
} <W] RyEg`
Ri>4:V3K
public void remove() { nTsKJX%\
SortUtil.swap(queue,1,size--); Pi+pQFz5
fixDown(1); "C0?s7Y
} wZ4w`|'
file://fixdown m)7Ql!l
private void fixDown(int k) { &F- \t5X=i
int j; y1{TVpN
while ((j = k << 1) <= size) { =6Fpixq>
if (j < size %26amp;%26amp; queue[j] j++; )ifjK6*
if (queue[k]>queue[j]) file://不用交换 :FTx#cZ
break; XHU\;TF
SortUtil.swap(queue,j,k); QyghNImp
k = j; (}g4}A@x
} GY>G}bfh
} O&dBLh!G
private void fixUp(int k) { {FQ@eeU
while (k > 1) { @E 8P>kq
int j = k >> 1; @An}
if (queue[j]>queue[k]) 0=0,ix7?#
break; (Bq^ D9
SortUtil.swap(queue,j,k); l1bkhA b
k = j; Y~xo=v(
} lArKfs/
} +7\d78U
ho-#Xbq#g
} /KLkrW
zmU@ k
} SZ29B
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SortUtil： 0iYo&q'n
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package org.rut.util.algorithm; ;6eBfMhL
jme`Tyd
import org.rut.util.algorithm.support.BubbleSort; 0~~yYo&
import org.rut.util.algorithm.support.HeapSort; \q($8<
import org.rut.util.algorithm.support.ImprovedMergeSort; {xAd>fGG+y
import org.rut.util.algorithm.support.ImprovedQuickSort; vPz$+&{I
import org.rut.util.algorithm.support.InsertSort; y\omJx=,
import org.rut.util.algorithm.support.MergeSort; e2e!"kEF
import org.rut.util.algorithm.support.QuickSort; ;FQNO:NP
import org.rut.util.algorithm.support.SelectionSort; 9X?RJ."J
import org.rut.util.algorithm.support.ShellSort; +4$][3.
@XJ#oxM^
/** C}#$wge
* @author treeroot @ ]40xKF
* @since 2006-2-2 f8 BZkh
* @version 1.0 F\, vIS
*/ [~PR\qm
public class SortUtil { Ur]/kij
public final static int INSERT = 1; o%bf7)~s
public final static int BUBBLE = 2; |1GOm=GNK
public final static int SELECTION = 3; 6Df*wi!jI
public final static int SHELL = 4; ,<N{Y[n]e
public final static int QUICK = 5; HfZ^ED"}
public final static int IMPROVED_QUICK = 6; 0 N"N$f
public final static int MERGE = 7; Xp] jF^5
public final static int IMPROVED_MERGE = 8; j7U&a}(
public final static int HEAP = 9; 1fvN[
PB *v45
public static void sort(int[] data) { []v$QR&u#v
sort(data, IMPROVED_QUICK); )s,LFIy<A
} qu1+.z=|
private static String[] name={ =z;]FauR!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RL:B.Lv/W
}; O6/:J#X%
;yajt\a
private static Sort[] impl=new Sort[]{ /oW]? 9
new InsertSort(), DK eB%k
new BubbleSort(), iO&*WIbg
new SelectionSort(), #i.,+Q
new ShellSort(), ,PmUl=
new QuickSort(), Nc&J%a
new ImprovedQuickSort(), %3O))Ug5
new MergeSort(), J%-4ZB"
new ImprovedMergeSort(), {G0=A~
new HeapSort() X;H\u6-|>6
}; NXQ=8o9,9
-%5#0Ogh M
public static String toString(int algorithm){ re_nb)4g
return name[algorithm-1]; .uVd'
} 6I: 6+n
jQxhR
public static void sort(int[] data, int algorithm) { O/|))H?C
impl[algorithm-1].sort(data); U(0FL6sPC
} d#TA20`
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public static interface Sort { JO*/UC>"
public void sort(int[] data); BPa,P_6(
} CIz0Gjtx6m
Q^ZM|(s#
public static void swap(int[] data, int i, int j) { ]Zt]wnL+
int temp = data; Q5ff&CE
data = data[j]; JOpH Z?
data[j] = temp; .dMdb7
} ^GAJ9AF@(
} iMt3h8