[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; |!J_3*6$>*
} orFB*{/Z
int i1=l; E O"
int i2=mid+1; <9x|)2P
for(int cur=l;cur<=r;cur++){ }Qh%Z)
if(i1==mid+1) (L!u[e0[#
data[cur]=temp[i2++]; mhF@S@
else if(i2>r) nyZ?m
data[cur]=temp[i1++]; !lKDNQ8>["
else if(temp[i1] data[cur]=temp[i1++]; ?sxf_0*
else r<;Y4<,BZ
data[cur]=temp[i2++]; &-x/c\jz
} (kx>\FIK*
} xM>dv5<E
ZJQkZ_9@2
} sA }X)aP
)5TX3#=;(G
改进后的归并排序: :~p_(rE
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package org.rut.util.algorithm.support; w_YY~Af
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import org.rut.util.algorithm.SortUtil; G~NhBA9
fVq,?
/** z]sQ3"cmX
* @author treeroot SNV;s,
* @since 2006-2-2 >Lz2zlZI
* @version 1.0 !zxq9IhWR
*/ aX~' gq>
public class ImprovedMergeSort implements SortUtil.Sort { ltd'"J/r
U27ja|W^
private static final int THRESHOLD = 10; }J=zO8OL
x_EU.924uY
/* o#IWH;ck.
* (non-Javadoc) V{0V/Nv
* Fh)YNW@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gKb5W094@
*/ C,u;l~zz
public void sort(int[] data) { hy:K) _
int[] temp=new int[data.length]; Pv@;)s(-
mergeSort(data,temp,0,data.length-1); [oH,FSuO!2
} j MA%`*r
t*Wxvoxk
private void mergeSort(int[] data, int[] temp, int l, int r) { F#{PJ#
int i, j, k; q5w)i
int mid = (l + r) / 2; wD[qE
if (l == r) %$!EjyH9
return; c{f1_qXN
if ((mid - l) >= THRESHOLD) Pq( )2B
mergeSort(data, temp, l, mid); 3*b!]^d:D
else Vs[!WJ 7
insertSort(data, l, mid - l + 1); FD}>}fLv
if ((r - mid) > THRESHOLD) 5TdI
mergeSort(data, temp, mid + 1, r); dk2o>jI4;
else @yjui
insertSort(data, mid + 1, r - mid); E9[8th,t
4>@-1nt}
for (i = l; i <= mid; i++) { Q_a%$a.rV
temp = data; &nZ.$UK<
} :Ee5:S
for (j = 1; j <= r - mid; j++) { [ \Aor[(
temp[r - j + 1] = data[j + mid]; =j~}];I
} [h2V9>4:
int a = temp[l]; BcoE&I?[m|
int b = temp[r]; qsL6*(S(r
for (i = l, j = r, k = l; k <= r; k++) { O~&l.>??
if (a < b) { G,i%:my7
data[k] = temp[i++]; 8%#uZG\}
a = temp; >Y/1%Hp9
} else { ]H<C Rw
data[k] = temp[j--]; ]# T9v06w
b = temp[j]; _'oy C(:}
} P.1iuZ "w
} `+/[0B=.
} gf2w@CVF>=
Bj7\{x,?
/** egi?Qg
* @param data JGD{cr[S
* @param l Bf88f<Z
* @param i HIeMV,.QN
*/ wGQ{
private void insertSort(int[] data, int start, int len) { 9tC8|~Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;h3*MR
} tg5jS]O
} ikRIL2Y
} A1f]HT
} )Bk?"q
.]H]H*wC
堆排序： 9e :E% 2
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package org.rut.util.algorithm.support; pN]Hp"v
qc'tK6=jp
import org.rut.util.algorithm.SortUtil; P[nWmY
PvT8XSlTx!
/** /9w}[y*E
* @author treeroot $'FPst8Q<
* @since 2006-2-2 d8RpL{9\7
* @version 1.0 v V^GIWK
*/ lE|T'?/
public class HeapSort implements SortUtil.Sort{ Ft.BfgJ$
^Q:K$!
/* (non-Javadoc) A# M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }5tn
*/ u\.sS|$
public void sort(int[] data) { {M~!?#<K
MaxHeap h=new MaxHeap(); wD,F=O
h.init(data); MM8)yCI
for(int i=0;i h.remove(); l*m|b""].u
System.arraycopy(h.queue,1,data,0,data.length); NJtB;
} S~Hj. d4/
( L6`_)
private static class MaxHeap{ : }IS=A
+%Gm2e;_u
void init(int[] data){ P*T)/A%4
this.queue=new int[data.length+1]; BVNh>^W5B
for(int i=0;i queue[++size]=data; #dfW1@m
fixUp(size); Hf-F-~E
} Mk9kGP%
} 7=AKQ7BB>b
kv4J@
private int size=0; ha),N<'
N+V-V-PVk
private int[] queue; y d$37G|n
r4lG 5dV
public int get() { \~H"!vj
return queue[1]; o_N02l4J)
} 09?<K)_G
3U`.:w`
public void remove() { ]/']{*T1
SortUtil.swap(queue,1,size--); XHg%X
fixDown(1); #"M Pe4
} *3K"Kc2
file://fixdown [Bh]\I'
private void fixDown(int k) { t}FMBGo[
int j; 9$S,P|
while ((j = k << 1) <= size) { uSQ*/h-<)0
if (j < size %26amp;%26amp; queue[j] j++; K]oPh:E
if (queue[k]>queue[j]) file://不用交换 >?'FH +2K
break; HW G~m:km
SortUtil.swap(queue,j,k); }a1UOScO0
k = j; Vel;t<1
} 7GUJ&U)J
} N [u Xo
private void fixUp(int k) { Uk2q,2
while (k > 1) { zef,*dQY
int j = k >> 1; Mt Z(\&~
if (queue[j]>queue[k]) j5O*H_D
break; ;Z_C3/b
SortUtil.swap(queue,j,k); [s2V-'2
k = j; `Vi:r9|P
} ,')bO*Ng
} ^IpiNY/%Q
"/fs%F
} 9%qMZP0]
G~L?q~b
} GvOAs-$
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SortUtil： DV\ei")
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package org.rut.util.algorithm; SEIu4 l$E
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import org.rut.util.algorithm.support.BubbleSort; u&xK>7
import org.rut.util.algorithm.support.HeapSort; YoJ'=z,e
import org.rut.util.algorithm.support.ImprovedMergeSort; =7Vl{>*1N
import org.rut.util.algorithm.support.ImprovedQuickSort; Zg&\K~OC
import org.rut.util.algorithm.support.InsertSort; lKUm_; m
import org.rut.util.algorithm.support.MergeSort; ..!-)q'?
import org.rut.util.algorithm.support.QuickSort; }YP7x|
import org.rut.util.algorithm.support.SelectionSort; @t8kN6.
import org.rut.util.algorithm.support.ShellSort; fNPj8\#V,
1>VS/H`
/** znO00qX
* @author treeroot 0s""%MhFI
* @since 2006-2-2 zD;] sk4
* @version 1.0 #cG479X"
*/ |S:!+[
public class SortUtil { ~!F4JRf
public final static int INSERT = 1; 7$W;4!BN*
public final static int BUBBLE = 2; Xb-c`k~_
public final static int SELECTION = 3; DS}rFU
public final static int SHELL = 4; sC_UalOC_
public final static int QUICK = 5; s;7qNwYO
public final static int IMPROVED_QUICK = 6; [=6~"!P}
public final static int MERGE = 7; wrYQ=u#Z
public final static int IMPROVED_MERGE = 8; $3.vVnc
public final static int HEAP = 9; B"9hQb
'Q>z**
public static void sort(int[] data) { i:M*L< +
sort(data, IMPROVED_QUICK); #pQ"+X
} ?s)sPM?
private static String[] name={ gQ=POJ=G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u?;Vxh3@|
}; vj&5`
}FiN 7#
private static Sort[] impl=new Sort[]{ 9m!!b{
new InsertSort(), C'czXZtn
new BubbleSort(), C!{AnWf
new SelectionSort(), ]p&<nK,
new ShellSort(), AY'?Xt
new QuickSort(), NTXL>Q*e
new ImprovedQuickSort(), R:OU>HsdX
new MergeSort(), ^I<T+X+<
new ImprovedMergeSort(), j8Q5d`
new HeapSort() cia-OVX
}; aXbNDj ][
2\63&C^
public static String toString(int algorithm){ ]vQ?]d?>a
return name[algorithm-1]; XyM(@6,'
} BU:Ecchbr
4:Xj-l^D
public static void sort(int[] data, int algorithm) { +'['HQ)
impl[algorithm-1].sort(data); 3$N %iE6
} c Z6p^
5Z6-R}uXk
public static interface Sort { :#w+?LA*
public void sort(int[] data); @?3vRs}h
} _TOi [GT
nl'J.dJe
public static void swap(int[] data, int i, int j) { qTTn51
int temp = data; <F)w=_%&
data = data[j]; M*O(+EM
data[j] = temp; `xX4!^0Hm
} N$%61GiulT
} x\`RW3 K