[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; MCe=RR
} KSqWq:W+
int i1=l; Z)|*mJ
int i2=mid+1; E$4\Yc)(AL
for(int cur=l;cur<=r;cur++){ h?bm1e5kE
if(i1==mid+1) <2diO=
data[cur]=temp[i2++]; }c|Xr^
else if(i2>r) A"I:cw"KY
data[cur]=temp[i1++]; V\PGk<VO
else if(temp[i1] data[cur]=temp[i1++]; 0>4:(t7h\
else 7tUl$H;I/R
data[cur]=temp[i2++]; q,^^c1f
} -HP [IJP
} \2: JX?Jw!
ss236&
} Ts|&_|
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改进后的归并排序: H;G*tje/M
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package org.rut.util.algorithm.support; (3%NudkwT
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import org.rut.util.algorithm.SortUtil; "npj%O<bd
My:wA;#
/** 1r\? uD
* @author treeroot LC*@/((
* @since 2006-2-2 2y,NT|jp
* @version 1.0 mj%Iow.
*/ }Wn6r_:
public class ImprovedMergeSort implements SortUtil.Sort { ?#rDoYt/Sx
hR[Qdu6r
private static final int THRESHOLD = 10; Q^DKKp
c3`X19'%fM
/* f<!eJO:<'
* (non-Javadoc) zRD{"uqi
* :?U1^!$$1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 BAnf9
*/ y2TJDb1
public void sort(int[] data) { xx#;)]WT
int[] temp=new int[data.length]; 9%$4Ux*q
mergeSort(data,temp,0,data.length-1); X[(u]h`
} gK9@-e
#Ji&.T^U/
private void mergeSort(int[] data, int[] temp, int l, int r) { ]GJIrtS4
int i, j, k; SH<Nt[8C
int mid = (l + r) / 2; #QXB2x<*
if (l == r) +K; X$kB
return; tegLGp@_
if ((mid - l) >= THRESHOLD) lmp0Ye|
mergeSort(data, temp, l, mid); mmu{K$9}I
else *t3fbD
insertSort(data, l, mid - l + 1); 2J|Wbey
if ((r - mid) > THRESHOLD) _Sosw|A
mergeSort(data, temp, mid + 1, r); }Rt?p8p
else =sG C
insertSort(data, mid + 1, r - mid); B7fURL Rqr
Z<0M_q9?MO
for (i = l; i <= mid; i++) { 'eLO#1Ipf
temp = data; U9SByqa1
} MJt?^G (w?
for (j = 1; j <= r - mid; j++) { ^^{K[sLB
temp[r - j + 1] = data[j + mid]; k129)79
} vO&%sjvH
int a = temp[l]; 54-sb~]
int b = temp[r]; E-MEMran4
for (i = l, j = r, k = l; k <= r; k++) { 2Rc#{A
if (a < b) { K!).QB'
data[k] = temp[i++]; H .JA)*b-
a = temp; ,&Gn7[<
} else { }{n[_:[7
data[k] = temp[j--]; *=$Jv1"Q +
b = temp[j]; bsmZR(EnU
} bfVKf}
} X) owj7U;
} ) 'j7Ra
l7ZqkGG]
/** cDYKvrPY
* @param data ^$FHI_
* @param l AcwLs%'sx
* @param i %{Kp#R5E
*/ .Qyq*6T3&
private void insertSort(int[] data, int start, int len) { :Z- =1b~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uv%T0JA/
} Ty}'A(U
} %|I~8>m
} N8@Fj!Zi
} *_}ft-*w
/3Zo8.
堆排序： A%-*M 'J
z|Q)^
package org.rut.util.algorithm.support; }G]6Rip3
#e}Q|pF
import org.rut.util.algorithm.SortUtil; 2y>~<S
D. fPHq
/** i/6(~v
* @author treeroot bz[U<
* @since 2006-2-2 +g(>]!swb
* @version 1.0 [d`J2^z}
*/ @>}!g9c
public class HeapSort implements SortUtil.Sort{ CCNrjaA
3,8<5)ds*
/* (non-Javadoc) ]]Sz|6P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %?Yf!)owh
*/ w<!F& kQB
public void sort(int[] data) { 6U Q~Fv`]
MaxHeap h=new MaxHeap(); 4QARrG%
h.init(data); e4fh<0gX
for(int i=0;i h.remove(); 2-s ,PQno^
System.arraycopy(h.queue,1,data,0,data.length); 7y5`YJ}!
} G|H+ ,B
--6C>iY[&u
private static class MaxHeap{ UMILAoR
bBk_2lg=4)
void init(int[] data){ 4@AY~"dq
this.queue=new int[data.length+1]; s/"&k
for(int i=0;i queue[++size]=data; n0bm 'qw
fixUp(size); Hz) Xn\x
} J: vq)G\F
} (u-K^xC
w[YiH $
private int size=0; iH<:wLY&J
]$oo1ssZ1
private int[] queue; Ngi]I#Vz
*'H0%GM
public int get() { O`j1~o<{
return queue[1]; Lp.dF)C\
} : E[\1
BCMQ^hP}t
public void remove() { BpBMFEiP
SortUtil.swap(queue,1,size--); ~_6~Fi
fixDown(1); cc- liY"
} f^Sl(^f
file://fixdown ~Ap.#VIc'
private void fixDown(int k) { \5M1;
int j; Q=9Ce@[
while ((j = k << 1) <= size) { @`xR1pXQ
if (j < size %26amp;%26amp; queue[j] j++; 6|:K1bI)
if (queue[k]>queue[j]) file://不用交换 #J~
break; h]T
SortUtil.swap(queue,j,k); 0`UI^Y~Q
k = j; I!1|);li
} _zt)c!
} _^w&k{T
private void fixUp(int k) { {P')$f)
while (k > 1) { G%ytp=N
int j = k >> 1; (SGX|,5X7
if (queue[j]>queue[k]) 7IkNS
break; !xcLJ5^W
SortUtil.swap(queue,j,k); Oxsx\f_
k = j; RT`.S uN
} zW#P ~zS
} ZZq]I
O:%s;p 5
} 3MX&%_wUhB
n x4:n@J
} {6Y|Z>
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SortUtil： u+EZ"p;o
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package org.rut.util.algorithm; 3D 4-Wo4
(%~^Kmfb0
import org.rut.util.algorithm.support.BubbleSort; $ /`X7a{
import org.rut.util.algorithm.support.HeapSort; 3fGL(5|_
import org.rut.util.algorithm.support.ImprovedMergeSort; =EFCd=i
import org.rut.util.algorithm.support.ImprovedQuickSort; v}\4/u
import org.rut.util.algorithm.support.InsertSort; _4,/uG|a O
import org.rut.util.algorithm.support.MergeSort; CCDU5l$$
import org.rut.util.algorithm.support.QuickSort; #mKF)W
import org.rut.util.algorithm.support.SelectionSort; sbv2*fno5
import org.rut.util.algorithm.support.ShellSort; OFe-e(c1
@*e5(@R
/** W_.WMbT
* @author treeroot <qGxkV
* @since 2006-2-2 Fz11/sKz
* @version 1.0 ?}g^/g !
*/ q7z`oK5
public class SortUtil { 1A%0y)]
public final static int INSERT = 1; lT^/8Z<g
public final static int BUBBLE = 2; -.xiq0
public final static int SELECTION = 3; BSH2Kq
public final static int SHELL = 4; *T6*Nxs0k
public final static int QUICK = 5; +~(SeTY
public final static int IMPROVED_QUICK = 6; KE[!{O^(a
public final static int MERGE = 7; C&|K7Zp0v
public final static int IMPROVED_MERGE = 8; jYUN:
public final static int HEAP = 9; L:j3
d!{]CZ"@
public static void sort(int[] data) { %(&$CmS@
sort(data, IMPROVED_QUICK); CKI.\o
} uM)#T*(
private static String[] name={ Znw3P|>B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8+i=u"<
}; fHK.q({Qc
&R5zt]4d&
private static Sort[] impl=new Sort[]{ A=W:}szt]
new InsertSort(), _mWVZ1P
new BubbleSort(), ]*?lgwE
new SelectionSort(), <*Nd%Ca
new ShellSort(), w**~k]In
new QuickSort(), 3D;?X@
new ImprovedQuickSort(), t)|~8xpP
new MergeSort(), j)ME%17
new ImprovedMergeSort(), JR_%v=n~x
new HeapSort() !mZDukfjQ
}; S86,m=
`L LS|S]
public static String toString(int algorithm){ \VpN:RI
return name[algorithm-1]; }7*|s+F(f
} 'B:8tv
(/7b8)g
public static void sort(int[] data, int algorithm) { o_8Wnx^
impl[algorithm-1].sort(data); av&~A+b.r
} v-Tkp Yn
gLm,;'h%u
public static interface Sort { x8w l
public void sort(int[] data); 2##;[
} *8r^!(Kj
f$76p!pDa
public static void swap(int[] data, int i, int j) { Vy=P*
int temp = data; w_h{6Kc<
data = data[j]; cgnMoBIc
data[j] = temp; LLc^SP j
} 3xk_ZK82
} 4VF4 8